Latest Products http://www.navpadsales.com Latest Products Mon, 16 May 2022 05:01:02 +0530 en-us http://www.navpadsales.com Plaster Mesh http://www.navpadsales.com/plaster-mesh.htm http://www.navpadsales.com/plaster-mesh.htm Thu, 01 Jul 2021 00:00:00 +0530 Cemfil Anti Crack HD Glass Fiber http://www.navpadsales.com/cemfil-anti-crack-hd-glass-fiber.htm http://www.navpadsales.com/cemfil-anti-crack-hd-glass-fiber.htm Thu, 01 Jul 2021 00:00:00 +0530 Fly Ash Bulker http://www.navpadsales.com/fly-ash-bulker.htm http://www.navpadsales.com/fly-ash-bulker.htm Thu, 01 Jul 2021 00:00:00 +0530 Fly Ash http://www.navpadsales.com/fly-ash.htm http://www.navpadsales.com/fly-ash.htm Thu, 01 Jul 2021 00:00:00 +0530 metakaolin powder http://www.navpadsales.com/metakaolin-powder.htm http://www.navpadsales.com/metakaolin-powder.htm Fri, 06 Aug 2021 00:00:00 +0530 Metakaolin is a pozzolan, probably the most effective pozzolanic material for use in concrete. It is a product that is manufactured for use rather than a by-product and is formed when china clay, the mineral kaolin, is heated to a temperature between 600 and 800ºC. Its quality is controlled during manufacture, resulting in a much less variable material than industrial pozzolans that are by-products. First used in the 1960s for the construction of a number of large dams in Brazil, metakaolin was successfully incorporated into the concrete with the original intention of suppressing any damage due to alkali-silica reaction. When used to replace cement at levels of 5 to 10% by weight, the concrete produced is generally more cohesive and less likely to bleed. As a result pumping and finishing processes require less effort. The compressive strength of hardened concrete is also increased at this level of replacement. Slightly higher replacement levels (up to 20%) produce a cement matrix that has low porosity and permeability. This results in improvements to resistance of the hardened concrete to attack by sulfates, chloride ions and other aggressive substances, such as mineral and organic acids. Freeze/ thaw resistance is improved and the risk of damage resulting from the effects of impact or abrasion is reduced for metakaolin concrete that has been finished and cured properly. Microsilica Powder http://www.navpadsales.com/microsilica-powder.htm http://www.navpadsales.com/microsilica-powder.htm Thu, 01 Jul 2021 00:00:00 +0530 FLY ASH Pozzocrete 60 Powder http://www.navpadsales.com/pozzocrete-60-powder.htm http://www.navpadsales.com/pozzocrete-60-powder.htm Wed, 11 Aug 2021 00:00:00 +0530 The Pozzocrete Fly Ash range is an artificial pozzolan, specially designed to achieve optimum performance on most cement and concrete applications. In the production of Pozzocrete 40™, 60™, 63™, and 83™ high quality PFA were selected and industrially processed in order to obtain maximum performance as a cement replacement product.The POZZOCRETE brand is reserved only for those grades which meet the Indian Standard 3812 , the European Standard EN450 Category S and the American Standard ASTM 618. Other by-products are called P... (with the related Grade number). The process used to produce Pozzocrete Fly Ash significantly reduces the amount of unburned particles leading to a virtually carbon free material. Optimum reactivity is obtained by rejecting the less reactive crystalline Fly Ash particles and by increasing the specific surface of the final product. POZZOCRETE products are available, depending on the product grade, in 30 kg paper bags, 50 kg HDP bags, Jumbo (big) bags carrying 1 – 1.3 ts , loose supply in 15 – 25 ts road tankers (bulkers)  and on customer request in break bulk shipments. The P-grades (with the exception of the P10 grade) are only available in big-bags or in bulker. The design of all Pozzocrete grades has taken into account the severe weather conditions in the areas where it may be supplied, in order to allow high cement replacement volumes insuring adequate strength development and good durability whilst avoiding short-term damage such as bleeding and thermo-hygrometric plastic shrinkage ULTRA FINE FLY ASH Pozzocrete 100 Powder http://www.navpadsales.com/pozzocrete-100-powder.htm http://www.navpadsales.com/pozzocrete-100-powder.htm Wed, 11 Aug 2021 00:00:00 +0530 POZZOCRETE 100 is being manufactured at the DIRK POZZOCRETE plant at Nashik. 90 % of the particles of this product are below 10 micron whereas the mean particle size is 3 microns. The high silica content and sum of oxides (SiO2 + Al2O3 + Fe2O3) are similar to what would be expected for a Class F Fly Ash as per EN 450 or ASTM C 618 designation.   This makes POZZOCRETE 100 a substitute of silica fume in concrete whilst showing further advantages in durability, workability, sulphate and chloride resistance. POZZOCRETE 100 reduces the heat of hydration in concrete.   .  Advantages:1.The Ultrafine Fly Ash branded as  POZZOCRETE 100 can produce  concrete strength comparable with that produced with a highly reactive pozzolan such as Silica Fume (SF). To reach the performance levels of SF concrete at early age, generally the concentration of UFFA and SF are the same must be slightly and the total water in the concrete must be reduced by about 15-20 %; 2. POZZOCRETE 100 displays a strong tendency to reduce water demand. For comparable workability as SF concrete, a 15-20% reduction in total water content, together with as much as a 30% reduction in HRWR (=High Range Water Reducer), is possible; 3. POZZOCRETE 100 concrete also displays a lower tendency towards cracking due to drying and autogenous shrinkage compared with SF concrete; 4. Processing FA into an ultra-fine material like POZZOCRETE 100 with a refined particle size distribution clearly improves its performance as a durability-enhancing admixture. The practical significance of the increased reactivity, from a concrete technology perspective , is that a given improvement in performance canbe achieved at a lower level of replacement (that is, the ultra-fine material is more efficient) compared with an unprocessed FA and at an earlier age. As such, POZZOCRETE 100 offers a viable alternative to SF in certain applications.    Glass Fiber Chicken Mesh http://www.navpadsales.com/glass-fiber-chicken-mesh.htm http://www.navpadsales.com/glass-fiber-chicken-mesh.htm Mon, 02 Aug 2021 00:00:00 +0530 Backed by years of industry experience, we are engaged in offering a premium quality range of Glass Fiber Chicken Mesh. We import Fiber Glass Mesh ranging from 45 gsm to 350 gsm are made non-alkaline, with high quality special glass yarns. The required chemical and physical characteristics as well as dimensional stability are achieved through special alkaline resistant finishes. Providing a proper use and observance of the plaster manufacturers working in building construction, this reinforcement fiber glass fabrics offer maximum security against tension. The reinforcement grids are highly unaffected by temperature, have excellent strength and an extreme resistance to alkali. The frequent occurring tensions in ceilings and walls are well compensated by the fabrics to prevent in the plaster. Fiber Glass Mesh is an ideal engineering material in construction and can be easily used to reinforce cement, stone, wall material, roofing, bitumen, gypsum, and so on. Alkali Resistant Fiber Glass Mesh is used for Internal & External Plaster Reinforcement. Description:The fiberglass alkali-resistant mesh is on the basis of alkali-resistant or C-glass or E-glass woven fabric, then coated by acrylic acid copolymer liquid. Features: Good alkaline-resistance High strength Excellent alkali and acid resistance Good cohesion Excellent in coating Application: Wall-reinforce Out-side wall heat insulation and waterproof Reinforcement of plastic, bitumen, plaster, marble, mosaic, etc. Ideal engineering material in construction. reinforcing mesh ( chicken mesh ) 6' x 50 mtr & 4' x 50mtr http://www.navpadsales.com/duramesh-reinforcing-mesh-chickn-mash.htm http://www.navpadsales.com/duramesh-reinforcing-mesh-chickn-mash.htm Wed, 11 Aug 2021 00:00:00 +0530 REINFORCE PLASTER MESH ( CHICKN MESH ) As reinforcing material, plaster mesh is used for building internal and external decoration, especially in plastering work. It protects the plaster layer surface from cracking and increases the mechanical strength of the plaster layer. Meanwhile plastering mesh provides a better grip with plaster wall and forms the skeleton layers of the wall plaster and putty, thereby significantly strengthening the plaster layer and significantly extending its service life. Due to its strength and durability, plaster mesh is also successfully used as reinforcing material in strengthening the foundations of buildings, restoration and reinforcement of existing plaster, brickwork, installation of thermal insulation and roofing tile ties, and road laying pavement construction. pulverised fly ash http://www.navpadsales.com/.htm http://www.navpadsales.com/.htm Mon, 02 Aug 2021 00:00:00 +0530 Why Fly Ash? What is fly ash? Fly ash is the finely divided residue that results from the combustion of pulverized coal and is transported from the combustion chamber by exhaust gases. Over 61 million metric tons (68 million tons) of fly ash were produced in 2001. Where does fly ash come from? Fly ash is produced by coal-fired electric and steam generating plants. Typically, coal is pulverized and blown with air into the boiler's combustion chamber where it immediately ignites, generating heat and producing a molten mineral residue. Boiler tubes extract heat from the boiler, cooling the flue gas and causing the molten mineral residue to harden and form ash. Coarse ash particles, referred to as bottom ash or slag, fall to the bottom of the combustion chamber, while the lighter fine ash particles, termed fly ash, remain suspended in the flue gas. Prior to exhausting the flue gas, fly ash is removed by particulate emission control devices, such as electrostatic precipitators or filter fabric baghouses (see Figure 1-1). Where is fly ash used? Currently, over 20 million metric tons (22 million tons) of fly ash are used annually in a variety of engineering applications. Typical highway engineering applications include: portland cement concrete (PCC), soil and road base stabilization, flowable fills, grouts, structural fill and asphalt filler. What makes fly ash useful? Fly ash is most commonly used as a pozzolan in PCC applications. Pozzolans are siliceous or siliceous and aluminous materials, which in a finely divided form and in the presence of water, react with calcium hydroxide at ordinary temperatures to produce cementitious compounds. The unique spherical shape and particle size distribution of fly ash make it a good mineral filler in hot mix asphalt (HMA) applications and improves the fluidity of flowable fill and grout. The consistency and abundance of fly ash in many areas present unique opportunities for use in structural fills and other highway applications. Environmental benefits. Fly ash utilization, especially in concrete, has significant environmental benefits including: (1) increasing the life of concrete roads and structures by improving concrete durability, (2) net reduction in energy use and greenhouse gas and other adverse air emissions when fly ash is used to replace or displace manufactured cement, (3) reduction in amount of coal combustion products that must be disposed in landfills, and (4) conservation of other natural resources and materials. Figure 1-1: Method of fly ash transfer can be dry, wet, or both. Production Fly ash is produced from the combustion of coal in electric utility or industrial boilers. There are four basic types of coal-fired boilers: pulverized coal (PC), stoker-fired or traveling grate, cyclone, and fluidized-bed combustion (FBC) boilers. The PC boiler is the most widely used, especially for large electric generating units. The other boilers are more common at industrial or cogeneration facilities. Fly ashes produced by FBC boilers are not considered in this document. Fly ash is captured from the flue gases using electrostatic precipitators (ESP) or in filter fabric collectors, commonly referred to as baghouses. The physical and chemical characteristics of fly ash vary among combustion methods, coal source, and particle shape. Table 1-1: 2001 Fly ash production and use.  Million Metric TonsMillion Short TonsPercent Produced 61.84 68.12 100.0 Used 19.98 22.00 32.3 As shown in Table 1-1, of the 62 million metric tons (68 million tons) of fly ash produced in 2001, only 20 million metric tons (22 million tons), or 32 percent of total production, was used. The following is a breakdown of fly ash uses, much of which is used in the transportation industry. Table 1-2: Fly ash uses.  Million Metric TonsMillion Short TonsPercent Cement/Concrete 12.16 13.40 60.9 Flowable Fill 0.73 0.80 3.7 Structural Fills 2.91 3.21 14.6 Road Base/Sub-base 0.93 1.02 4.7 Soil Modification 0.67 0.74 3.4 Mineral Filler 0.10 0.11 0.5 Mining Applications 0.74 0.82 3.7 Waste Stabilization /Solidification 1.31 1.44 6.3 Agriculture 0.02 0.02 0.1 Miscellaneous/Other 0.41 0.45 2.1 Totals 19.98 22.00 100 Handling The collected fly ash is typically conveyed pneumatically from the ESP or filter fabric hoppers to storage silos where it is kept dry pending utilization or further processing, or to a system where the dry ash is mixed with water and conveyed (sluiced) to an on-site storage pond. The dry collected ash is normally stored and handled using equipment and procedures similar to those used for handling portland cement: Fly ash is stored in silos, domes and other bulk storage facilities Fly ash can be transferred using air slides, bucket conveyors and screw conveyors, or it can be pneumatically conveyed through pipelines under positive or negative pressure conditions Fly ash is transported to markets in bulk tanker trucks, rail cars and barges/ships Fly ash can be packaged in super sacks or smaller bags for specialty applications Dry collected fly ash can also be moistened with water and wetting agents, when applicable, using specialized equipment (conditioned) and hauled in covered dump trucks for special applications such as structural fills. Water conditioned fly ash can be stockpiled at jobsites. Exposed stockpiled material must be kept moist or covered with tarpaulins, plastic, or equivalent materials to prevent dust emission. Characteristics Size and Shape. Fly ash is typically finer than portland cement and lime. Fly ash consists of silt-sized particles which are generally spherical, typically ranging in size between 10 and 100 micron (Figure 1-2). These small glass spheres improve the fluidity and workability of fresh concrete. Fineness is one of the important properties contributing to the pozzolanic reactivity of fly ash. Figure 1-2: Fly ash particles at 2,000x magnification. Chemistry. Fly ash consists primarily of oxides of silicon, aluminum iron and calcium. Magnesium, potassium, sodium, titanium, and sulfur are also present to a lesser degree. When used as a mineral admixture in concrete, fly ash is classified as either Class C or Class F ash based on its chemical composition. American Association of State Highway Transportation Officials (AASHTO) M 295 [American Society for Testing and Materials (ASTM) Specification C 618] defines the chemical composition of Class C and Class F fly ash. Class C ashes are generally derived from sub-bituminous coals and consist primarily of calcium alumino-sulfate glass, as well as quartz, tricalcium aluminate, and free lime (CaO). Class C ash is also referred to as high calcium fly ash because it typically contains more than 20 percent CaO. Class F ashes are typically derived from bituminous and anthracite coals and consist primarily of an alumino-silicate glass, with quartz, mullite, and magnetite also present. Class F, or low calcium fly ash has less than 10 percent CaO. Table 1-3: Sample oxide analyses of ash and portland cement CompoundsFly Ash Class FFly Ash Class CPortland Cement SiO2 55 40 23 Al203 26 17 4 Fe2O3 7 6 2 CaO (Lime) 9 24 64 MgO 2 5 2 SO3 1 3 2 Color. Fly ash can be tan to dark gray, depending on its chemical and mineral constituents. Tan and light colors are typically associated with high lime content. A brownish color is typically associated with the iron content. A dark gray to black color is typically attributed to an elevated unburned carbon content. Fly ash color is usually very consistent for each power plant and coal source. Figure 1-3: Typical ash colors Quality of Fly Ash Quality requirements for fly ash vary depending on the intended use. Fly ash quality is affected by fuel characteristics (coal), co-firing of fuels (bituminous and sub-bituminous coals), and various aspects of the combustion and flue gas cleaning/collection processes. The four most relevant characteristics of fly ash for use in concrete are loss on ignition (LOI), fineness, chemical composition and uniformity. LOI is a measurement of unburned carbon (coal) remaining in the ash and is a critical characteristic of fly ash, especially for concrete applications. High carbon levels, the type of carbon (i.e., activated), the interaction of soluble ions in fly ash, and the variability of carbon content can result in significant air-entrainment problems in fresh concrete and can adversely affect the durability of concrete. AASHTO and ASTM specify limits for LOI. However, some state transportation departments will specify a lower level for LOI. Carbon can also be removed from fly ash. Some fly ash uses are not affected by the LOI. Filler in asphalt, flowable fill, and structural fills can accept fly ash with elevated carbon contents. Fineness of fly ash is most closely related to the operating condition of the coal crushers and the grindability of the coal itself. For fly ash use in concrete applications, fineness is defined as the percent by weight of the material retained on the 0.044 mm (No. 325) sieve. A coarser gradation can result in a less reactive ash and could contain higher carbon contents. Limits on fineness are addressed by ASTM and state transportation department specifications. Fly ash can be processed by screening or air classification to improve its fineness and reactivity. Some non-concrete applications, such as structural fills are not affected by fly ash fineness. However, other applications such as asphalt filler, are greatly dependent on the fly ash fineness and its particle size distribution. Chemical composition of fly ash relates directly to the mineral chemistry of the parent coal and any additional fuels or additives used in the combustion or post-combustion processes. The pollution control technology that is used can also affect the chemical composition of the fly ash. Electric generating stations burn large volumes of coal from multiple sources. Coals may be blended to maximize generation efficiency or to improve the station environmental performance. The chemistry of the fly ash is constantly tested and evaluated for specific use applications. Some stations selectively burn specific coals or modify their additives formulation to avoid degrading the ash quality or to impart a desired fly ash chemistry and characteristics. Uniformity of fly ash characteristics from shipment to shipment is imperative in order to supply a consistent product. Fly ash chemistry and characteristics are typically known in advance so concrete mixes are designed and tested for performance. Table 1-4: Guidance documents used for fly ash quality assurance. ACI 229R Controlled Low Strength Material (CLSM) ASTM C 311 Sampling and Testing Fly Ash or Natural Pozzolans for Use as a Mineral Admixture in Portland Cement Concrete AASHTO M 295ASTM C 618 Fly Ash and Raw or Calcined Natural Pozzolan for Use as a Mineral Admixture in Portland Cement Concrete ASTM C 593 Fly Ash and Other Pozzolans for Use With Lime ASTM D 5239 Standard Practice for Characterizing Fly Ash for Use in Soil Stabilization ASTM E 1861 Guide for the Use of Coal Combustion By-Products in Structural Fills Quality Assurance and Quality Control criteria vary for each use of fly ash from state to state and source to source. Some states require certified samples from the silo on a specified basis for testing and approval before use. Others maintain lists of approved sources and accept project suppliers' certifications of fly ash quality. The degree of quality control requirements depends on the intended use, the particular fly ash, and its variability. Testing requirements are typically established by the individual specifying agencies. Figure 1-4: Microscopic photographs of fly ash (left) and portland cement (right). Table 1-5. Specifications for fly ash in PCC.AASHTO M 295 (ASTM C 618) - Class F and C    Class FClass C Chemical RequirementsSiO2 + Al2O3 + Fe2O3 min% 701 50 SiO3 max% 5 5 Moisture Content max% 3 3 Loss on ignition (LOI) max% 51 51 Optional Chemical RequirementsAvailable alkalies max% 1.5 1.5 Physical RequirementsFineness (+325 Mesh) max% 34 34 Pozzolanic activity/cement (7 days) min% 75 75 Pozzolanic activity/cement (28 days) min% 75 75 Water requirement max% 105 105 Autoclave expansion max% 0.8 0.8 Uniform requirements2: density max% 5 5 Uniform requirements2: Fineness max% 5 5 Optional Physical RequirementsMultiple factor (LOI x fineness)   255 -- Increase in drying shrinkage max% .03 .03 Uniformity requirements: Air entraining agent max% 20 20 Cement/Alkali Reaction: Mortar expansion (14 days) max% 0.020 -- Notes: ASTM requirements are 6 percent The density and fineness of individual samples shall not vary from the average established by the 10 preceding tests, or by all preceding tests if the number is less than 10, by more than the maximum percentages indicated. adhesive glass fiber tape http://www.navpadsales.com/.htm http://www.navpadsales.com/.htm Mon, 02 Aug 2021 00:00:00 +0530 Self-adhesive fiberglass mesh is the best tape for the job. Rake over the damaged plaster with a paint scraper. ... Unroll enough self-adhesive fiberglass mesh tape to cover the crack. ... Cover the tape with plaster or drywall joint compound. ... Apply one coat of plaster or drywall joint compound over the tape. fiberglass roll http://www.navpadsales.com/fiberglass-roll.htm http://www.navpadsales.com/fiberglass-roll.htm Mon, 02 Aug 2021 00:00:00 +0530 With a firm commitment to quality, our organization is engaged in offering a wide ambit of Fiberglass Roll. Backed by rich industry experiences; we are highly engaged in offering a premium quality range of Fiberglass Roll. We have carved a niche for ourselves in this domain by providing a premium quality gamut of Fiberglass Roll. pulverised fuel ash FLY ASH http://www.navpadsales.com/pulverised-fuel-ash.htm http://www.navpadsales.com/pulverised-fuel-ash.htm Mon, 02 Aug 2021 00:00:00 +0530 Uses, Benefits and Drawbacks of Fly Ash in Construction concrete curb construction Updated April 07, 2017 Fly ash is a fine powder which is a byproduct from burning pulverized coal in electric generation power plants. Fly ash is a pozzolan, a substance containing aluminous and siliceous material that forms cement in the presence of water. When mixed with lime and water it forms a compound similar to Portland cement. The fly ash produced by coal-fired power plants provide an excellent prime material used in blended cement, mosaic tiles, and hollow blocks among others. Fly ash can be an expensive replacement for Portland cement in concrete although using it improves strength, segregation, and ease of pumping concrete. The rate of substitution typically specified is 1 to 1 ½ pounds of fly ash to 1 pound of cement. Nonetheless, the amount of fine aggregate should be reduced to accommodate fly ash additional volume. Fly Ash Applications Fly ash can be used as prime material in blocks, paving or bricks; however, one the most important applications is PCC pavement. PCC pavements use a large amount of concrete and substituting fly ash provides significant economic benefits. Fly ash has also been used for paving roads and as embankment and mine fills, and it's gaining acceptance by the Federal government, specifically the Federal Highway Administration. Fly Ash Drawbacks Smaller builders and housing contractors are not that familiar with fly ash products which could have different properties depending on where and how it was obtained. For this reason, fly ash applications are encountering resistance from traditional builders due to its tendency to effloresce along with major concerns about freezethaw performance. Other major concerns about using fly ash concrete include: Slower strength gain. Seasonal limitation. Increase in air entraining admixtures. reinforcing plaster mash ( CHICKN MASH ) http://www.navpadsales.com/reinforce-plaster-mesh-chickn-mesh.htm http://www.navpadsales.com/reinforce-plaster-mesh-chickn-mesh.htm Mon, 02 Aug 2021 00:00:00 +0530 REINFORCE PLASTER MESH ( CHICKN MESH ) As reinforcing material, plaster mesh is used for building internal and external decoration, especially in plastering work. It protects the plaster layer surface from cracking and increases the mechanical strength of the plaster layer. Meanwhile plastering mesh provides a better grip with plaster wall and forms the skeleton layers of the wall plaster and putty, thereby significantly strengthening the plaster layer and significantly extending its service life. Due to its strength and durability, plaster mesh is also successfully used as reinforcing material in strengthening the foundations of buildings, restoration and reinforcement of existing plaster, brickwork, installation of thermal insulation and roofing tile ties, and road laying pavement construction. Silica Fume http://www.navpadsales.com/silica-fume.htm http://www.navpadsales.com/silica-fume.htm Tue, 03 Aug 2021 00:00:00 +0530 Silica fume is a byproduct of producing silicon metal or ferrosilicon alloys. One of the most beneficial uses for silica fume is in concrete. Because of its chemical and physical properties, it is a very reactive pozzolan. Concrete containing silica fume can have very high strength and can be very durable. Micro Silica http://www.navpadsales.com/micro-silica.htm http://www.navpadsales.com/micro-silica.htm Tue, 03 Aug 2021 00:00:00 +0530 Microsilica can be used in concrete and refractory materials. Microsilica ,when used in concrete, it can improve concrete’s properties such as compressive strength, bond strength and abrasion resistance, reduces permeability,and therefore helps in protecting reinforcing steel from corrosion.   Micro Silica Micro Silica is designed to give a big Qualitative boost to Concrete. It is well recognized that Concrete Mix for High Strength cannot be achieved without some extra cementitious material beyond Cement & Fly ash. Here Micro Silica plays a vital role in                   ü  Increasing Compressive, Flexural and bond strengths in concrete. ü  Improves the Life of Concrete by acting as Corrosion Inhibitor for Reinforcement. ü  Improves the Life of Concrete by reducing Alkali-Silica Reaction (ASR) or Concrete Cancer. Micro Silica is a mineral admixture comprising of very fine solid glassy spheres of silicon dioxide (SiO2). Micro Silica is fine amorphous silica with particle size around 100 times smaller than average particle size of cement and fly ash.     Higher Compressive, Flexural & Bond Strength with Micro Silica ü  The silica present in Micro Silica, reacts with the weaker calcium hydroxide released during the hydration of cement and forms additional calcium silicate hydrate (C – S – H). The concrete derives greater strength from higher concentration of strong Calcium Silicate Hydrate replacing weak and easily soluble calcium hydroxide.   ü  Micro Silica is like a pozzolanic material which provides more uniform distribution and a greater volume of hydration in concrete structures. This changes the Rheology of concrete and reduces the water-binder ratio. This in turn results into higher compressive strength.   Reinforcement Corrosion Inhibitor role of Micro Silica ü  With particle size of 1/100th of cement & fly ash, Micro Silica drastically reduces the average size of pores in the concrete. This drastically reduces water permeability in concrete.   ü  Lower water-binder ratio achieved by adding Micro Silica ensure that the concrete does not loose water during setting and no pin holes are created.   ü  It reduces the rate of carbonation, decreases permeability to chloride ions and imparts high electrical resistivity. Hence it protects the reinforcement steel and embedment.   ü  As an additional functional benefit, this reduces the instances of damp and water leakage troubles.     Resistant to Concrete Cancer (Alkali-Aggregate Reaction)   ü  Cement Hydration process produces Calcium Hydroxide along with Sodium and Potassium oxides which has the following impact on concrete at a later stage: §  With age the porosity of concrete gathers sufficient moisture to aid a swelling reaction between highly alkaline cement paste and the reactive non-crystalline silica found in many aggregates. This form hydroscopic gel of Sodium Silicate which swells absorbing further moisture weakening the concrete and creating cracks. These cracks lead to increased porosity which in turn exponentially propagates the process of disintegration. That is the reason it is termed as Concrete Cancer.     §  In case of Sulfate attack, free calcium hydroxide reacts to produce calcium sulphate. This brings acidity in concrete and weakens the structure. ü  Micro Silica acts with the policy of “fight Fire with Fire” to combat ASR reaction. It initiates a prompt reaction at early stage of concrete hardening. Thus, it binds these trouble makers, i.e. Calcium Hydroxide along with Sodium and Potassium oxides. Thus, they are arrested and quarantined not allowing them to create much trouble at later stage. Add to this the fact that Micro Silica has already reduced the porosity and hence curtailing the availability of moisture, the other key requirement for this process.     RecommendationMicro Silica can be mixed between 5-10% of cement used in Concrete Mix for excellentperformance.   Fiber Glass Mesh http://www.navpadsales.com/fiber-glass-mesh.htm http://www.navpadsales.com/fiber-glass-mesh.htm Tue, 10 Aug 2021 00:00:00 +0530   Being a leading firm in this industry, we are offering a high quality range of Fiber Glass Mesh. Fiber Glass Mesh is an ideal engineering material in construction and can be easily used to reinforce cement, stone, wall material, roofing, bitumen, gypsum, and so on. Alkali Resistant Fiber Glass Mesh is used for Internal & External Plaster Reinforcement.   fiberglass mesh http://www.navpadsales.com/fiberglass-mesh.htm http://www.navpadsales.com/fiberglass-mesh.htm Tue, 10 Aug 2021 00:00:00 +0530 We are among the reputed organizations, highly engaged in providing an optimum quality range of Fiberglass Mesh.   With sincerity and hard work of our professionals, we have carved a niche for ourselves in this domain by providing a premium quality gamut of Fiberglass Mesh. Pozzocrete Fly Ash Pozzocrete 60 http://www.navpadsales.com/pozzocrete-fly-ash-pozzocrete-60.htm http://www.navpadsales.com/pozzocrete-fly-ash-pozzocrete-60.htm Tue, 10 Aug 2021 00:00:00 +0530 Pozzocrete 60 is a high efficiency pozzolanic material, obtained by selection and processing of power station fly ashes resulting from the combustion of pulverised bituminous coal. Pozzocrete 60 is subjected to strict quality control. Pozzocrete (P40, P60 and P100)a processed quality assured fly ash, investigated for its use as a partial replacement for cement in cement mortar (1:3). The utilization of Pozzocrete (P40, P60 and P100) as cement replacement material in mortar or as additive in cement introduces many benefits from economical, technical and environmental points of view. This paper presents the results of the cement mortar of mix proportion 1:3 in which cement is partially replaced with Pozzocrete (P40, P60 and P100) as 0%, 10%, 30%and 50% by weight of cement. Four set of mixture proportions were made. First were control mix (without Pozzocrete (P40, P60 and P100) with regional fine aggregate (sand)) and the other mixes contained Pozzocrete (P40, P60 and P100) obtained from DIRK India Private Limited, nashik, Maharashtra state. The compressive strength has been obtained with partial replacement of Pozzocrete (P40, P60 and P100) with cement. Test results indicate the decreases in the strength properties of mortar with Pozzocrete (P40, P60 and P100) for strength at 28 days as partial replacement with the cement in the cement mortar 1:3. So it can be used in non-structural elements with the low range compressive strength where strength is not required and low cost temporary structure is prepared. Anti - Crack AR Glass Fiber http://www.navpadsales.com/ar-glass-fiber.htm http://www.navpadsales.com/ar-glass-fiber.htm Tue, 10 Aug 2021 00:00:00 +0530 Anti-Crack HD (High Dispersion) is an engineered AR-glass chopped strand designed for mixing in concrete and all hydraulic mortars.Anti-Crack HD fibers are typically used at low addition level to prevent cracking & improve the performance of concrete, flooring, renders or other special mortar mixes.They incorporate easily into mixes creating a multidimensional homogeneous network of reinforcement in the matrix.Anti-Crack?? HD fibres can be added at the central mixing plant to the wet concrete mix; or directly into the ready-mix truck.Quality Standards Certification:Fibres can be introduced directly in the ready mix plant or directly in the concrete truck. Recommended dosage is 600 g/m3 (1 lb/cum) of concrete to control plastic shrinkage cracking Anti-Crak HD fibres are packed in individual paper bags (water dispersible) or in plastic bags.Anti-Crak HD fibres should be stored away from heat and moisture, and in their original packaging.The best conditions are:Anti-Crak HD fibres do not protrude through the surface and require no additional finishing procedures.The reinforcement is incorporated in the concrete mass and is invisible on the finished surface.High dispersion (220 million filaments per kg, 100 million per lb)Excellent workabilityInvisible on the finished surfaceDoes not corrodeControl and prevention of cracking in fresh concreteOverall enhancement of durability and mechanical properties of concreteEffective at very low dosageHomogeneous mixSafe and easy to handleLoss on Ignition: 0.55% (ISO 1980: 1980)Moisture: 0.3% max (ISO 3344: 1977)Material: Alkali Resistant Glass*Specific Gravity: 2.68 g/cm3Electrical Conductivity: Very lowChemical Resistance: Very highModulus of elasticity: 72GPa – 10 x 106 psiTensile Strength: 1,700 MPa – 250 x 103 psiAnti-Crak HD fibres are part of Cem-FIL product range Cem-FIL anti-crack HD http://www.navpadsales.com/cem-fil-anti-crack-hd.htm http://www.navpadsales.com/cem-fil-anti-crack-hd.htm Mon, 03 Jan 2022 00:00:00 +0530 Anti-Crack HD (High Dispersion) is an engineered AR-glass chopped strand designed for mixing in concrete and all hydraulic mortars. Anti-Crack HD fibers are typically used at low addition level to prevent cracking & improve the performance of concrete, flooring, renders or other special mortar mixes.They incorporate easily into mixes creating a multidimensional homogeneous network of reinforcement in the matrix.Anti-Crack?? HD fibres can be added at the central mixing plant to the wet concrete mix; or directly into the ready-mix truck PRODUCT DESCRIPTION ADVANTAGES AND BENEFITS FEATURES (nominal values)PRODUCT APPLICATIONAnti-Crak HD (High Dispersion) is an engineered AR-glass chopped strand designed for mixing in concrete and all hydraulic mortars.Anti-Crak HD fibers are typically used at low addition level to prevent cracking & improve the performance of concrete, flooring, renders or other special mortar mixes.They incorporate easily into mixes creating a multidimensional homogeneous network of reinforcement in the matrix.Anti-Crak?? HD fibres can be added at the central mixing plant to the wet concrete mix; or directly into the ready-mix truck.-Anti-Crak HD fibres do not protrude through the surface and require no additional finishing procedures. -The reinforcement is incorporated in the concrete mass and is invisible on the finished surface.-High dispersion (220 million filaments per kg, 100 million per lb)-Excellent workability- Invisible on the finished surface- Does not corrode -Control and prevention of cracking in fresh concrete- Overall enhancement of durability and mechanical properties of concrete- Effective at very low dosage- Homogeneous mix- Safe and easy to handle- Fiber length: 12 mm - Filament diameter: 14m, (0.000546 in)- Loss on Ignition: 0.55% (ISO 1980: 1980)- Moisture: 0.3% max (ISO 3344: 1977) Material: Alkali Resistant Glass* Specific Gravity: 2.68 g/cm3 Softening point: 860??C - 1580??F-Electrical Conductivity: Very low-Chemical Resistance: Very highModulus of elasticity: 72GPa - 10 x 106 psi-Tensile Strength: 1,700 MPa - 250 x 103 psi* Anti-Crak HD fibres are part of Cem-FIL product rangeQUALITY STANDARDS CERTIFICATIONFibres can be introduced directly in the ready mix plant or directly in the concrete truck.Recommended dosage is 600 g/m3 (1 lb/cum) of concrete to control plastic shrinkage crackingAnti-Crak HD fibres are packed in individual paper bags (water dispersible) or in plastic bags.Anti-Crak HD fibres should be stored away from heat and moisture, and in their original packaging.The best conditions are:- Temperature: 15C - 35C.- Humidity: 35% - 65%.Hear I provide you a Price for your Demanded product quality.Anti-Crak 25. KG BAGS  Round Cover Block http://www.navpadsales.com/round-cover-block.htm http://www.navpadsales.com/round-cover-block.htm Wed, 11 Aug 2021 00:00:00 +0530 A cover block is basically a spacer that is used to lift the rebar matrix off the ground so that concrete may flow below the rebar. In order to prevent corrosion of the rebar, it has to be totally sheathed in concrete. It usually needs about 2 to 3 inches of coverage on all sides. So the cover block lifts the rebar up by about 2 to 3 inches and becomes a permanent and integral part of the poured concrete, make certain that no part of the rebar sags and minimizes that required concrete coverage throughout the pour. Metakaolin http://www.navpadsales.com/metakaolin.htm http://www.navpadsales.com/metakaolin.htm Mon, 02 May 2022 00:00:00 +0530 Metakaolin grades of calcined clays are reactive allumino silicate pozzolan formed by calcining very pure hydrous chinaclay. Chamically metakaoline combines with calcium hydroxide to form calcium silicate and calcium alluminate hydrates. Unlike other natural pozzolan metakaolin is water processed to remove unreactive impurities producing an almost 100 percent reactive material.the particle size of metakaolin is significantly smaller than cement particles. Is 456:2000 recommends use of metakaolin as mineral admixture. Metakaolin is a pozzolan, probably the most effective pozzolanic material for use in concrete. It is a product that is manufactured for use rather than a by-product and is formed when china clay, the mineral kaolin, is heated to a temperature between 600 and 800ºC. Its quality is controlled during manufacture, resulting in a much less variable material than industrial pozzolans that are by-products. First used in the 1960s for the construction of a number of large dams in Brazil, metakaolin was successfully incorporated into the concrete with the original intention of suppressing any damage due to alkali-silica reaction. When used to replace cement at levels of 5 to 10% by weight, the concrete produced is generally more cohesive and less likely to bleed. As a result pumping and finishing processes require less effort. The compressive strength of hardened concrete is also increased at this level of replacement. Slightly higher replacement levels (up to 20%) produce a cement matrix that has low porosity and permeability. This results in improvements to resistance of the hardened concrete to attack by sulfates, chloride ions and other aggressive substances, such as mineral and organic acids. Freeze/ thaw resistance is improved and the risk of damage resulting from the effects of impact or abrasion is reduced for metakaolin concrete that has been finished and cured properly.