1. Introduction. In recent years, due to the low hydration heat and good crack resistance [1], [2], [3], low-heat Portland (LHP) cement concrete has been used in water conservancy projects worldwide, such as Baihetan Hydropower Project and Wudongde Arch Dam [4], [5].However, when the flow velocity of the flood discharge structure …
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The environmental impacts of cement manufacturing are becoming a real-time issue that requires attention. This paper investigates the mechanical and physical properties of mortars with finely ground sand as a substitute for cement. The experimental program consisted of three silica sands with a Blaine Specific Surface (BSS) area of 459 m2/kg, …
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Microsilica in concrete enhances its performance and durability by reducing pores and increasing hydration. Learn about its types, properties, and applications.
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In the other samples, 20% of the mass of the cement was replaced for silica fume (Silica fume paste—SFP) or quartz powder (Quartz powder paste—QPP) for the semi-adiabatic calorimetry and Le ...
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This study investigates the mechanical properties of high-strength self-compacting concrete (HSSCC) through rigorous laboratory testing. Six input parameters—cement, water-cement ratio, nano-silica percentage, fine aggregate, coarse aggregate and temperature—are analysed with compressive, flexural, and split tensile …
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The supplementary cementitious materials (SCMs) are used as an alternative material to reduce environmental concerns. Using industrial waste as an SCM can also help to reduce the amount of garbage deposited in lagoons and landfills and can have strength, durability, economic and environmental benefits. Ultra-high performance concrete …
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The temperature variation of the concrete mixes measured by the maturity logger for 24 h after mixing showed a noticeable rise in temperature in nano-silica high-performance concrete (nS-HPC) compared to ordinary concrete and micro-silica high-performance concrete (mS-HPC), indicating that nS particles increased early hydration …
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Silica fume concrete is composed of cement, silica fume, fine aggregate, coarse aggregate, and water. Fresh and hardened properties of silica fume concrete is superior to conventional concrete. For instance, it has higher compressive and flexural ...
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The effect of curing procedure on hardened silica fume concrete is reported. The silica fume contents were 10%, 15%, 20%, and 30% by weight of cement. The aggregate to cementitious material ratios ...
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Silica sand is a commonly used material in the construction industry, particularly in the production of concrete. This outline will explore the reasons why silica sand is used in …
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Use of supplementary cementitious materials (sCMs) provides great effort towards reducing the consumption of cement. Clay silica sand is such a cement replacement material [3] [4][5][6][7][8][9 ...
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After that it decreases. 2-Compressive Strength of Silica Sand Concrete The compressive strength of referral concrete as well as silica sand concrete is given in table 4.2. For finding the compressive strength …
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This study is about silica fume (SF) which is used in geopolymer concrete, silica fume an extremely pozzolanic substance, a ferrosilicon industry by-product is used to enhance the mechanical and endurance characteristics of concrete. It could be combined with silica dust and Portland cement or put directly as an element to concrete.
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A review on eminent application and performance of nano based silica and silica fume in the cement concrete. Author links ... (0 and 15%), ing agents (20,30 and 40 kg/m 3) and BF (0,1.5 and 3%).UPV, apparent porosity, sorpitivity, compressive, tensile and flexural strength, water absorption, thermal conductivity and resistance, …
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In addition to the control, three binary and three ternary blends of concrete containing different percentages of cement/BA and cement/BA/SF were tested to …
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specification also calls for a maximum water/cement ratio of 0.40. The producer plans to use 7.5% silica fume by weight of cement to meet this coulomb requirement. Concrete workability must also be taken into consideration. Step 1: Start with a mix that meets the water/cement ratio requirement. Materials SSD Mass, kg/m 3SSD Weight, lbs/yd ...
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The current research aims to produce green (environmentally friendly) concrete by using plastic waste as coarse aggregates in different proportions (10% and 20%) and nano silica sand powder as an ...
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Yang et al. [7] investigated the mechanical properties of seawater and sea sand alkali-activated slag concrete. They found that bond strength and residual frictional stress were slightly higher with seawater or sea sand compared to ordinary concrete, with the highest shear fracture energy in seawater and sea sand alkali-activated slag concrete.
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Silica sand which is naturally available material available in the vicinity of certain hilly area was used as partial replacement of cement in concrete.
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APPLICATIONS ANDBENEFITS OF OUR WASHED, DRIED, & SORTED SILICA SAND: Raw material for precast concrete products Water filtration media (ANSI/NSF 61 …
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This study explores the effects of high-content fly ash and limestone filler partial replacement for portland cement and silica sand, respectively on the flexural toughness parameters of engineered cementitious composites (ECC).
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Industrial silica sand is a by-product obtained from the industries like paint, paper, rubber etc. It has a similar property with river sand and& M sand. This study …
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Several issues should be taken into consideration when adding nano silica to the cement mixture in concrete production. For instance, the issue of water permeability of hardened concrete. ... (kg/m 3) 5 mm (kg/m 3) Dune sand ... was depicted when 9% MS and 1% NS partially replaced cement with 40.7% enhancement compared to the control …
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Building materials in the construction industry, particularly concrete and cement, are one of the parameters that cause an increase in global CO2 emissions. Cement production is responsible for 5–8% of these emissions, being a key factor in global warming potential (GWP). This underscores the need for scholarly attention to the …
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The addition of silica fume as a cement paste replacement can significantly improve the mechanical properties of concrete. When SF substitution amount was increased from 0% to 10%, the cubic compressive strength and splitting-tensile strength were increased by 26.7% and 40.7% respectively.
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Two control mixtures were designed at w/cm ratios of 0.60 and 0.40 with cement contents of 350 and 450 kg/m 3, respectively. A partial replacement of cement with silica fume was used to examine the effect of silica fume on the mechanical properties of rubberized concretes.
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Effect of Partial Replacement of Cement by Silica Fume on Hardened Concrete ... grade Ordinary Portland Cement, sand and coarse ... With an average silica fume dosage of about 40 kg, ...
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The first reference mix had the same cement content (400 kg/m 3) and similar workability as the silica fume concrete. Its water to cementitious materials ratio was 0.40, which is higher than the silica fume concrete, thus reflecting the water reducing effects of the silica fume when added in combination with a superplasticizer.
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The mix design M-40 grade for Pier (Using Admixture – Fosroc) provided here is for reference purpose only. Actual site conditions vary and thus this should be adjusted as per the location and other factors. Parameters for mix design M40 Grade Designation = M-40 Type of cement = O.P.C-43 grade Brand of cement = Vikram...
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This study explores the effect of high content of silica sand as a partial replacement for fine aggregate for concrete making in construction purpose. In this …
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A cement tanker that could ordinarily haul 35 metric tons of cement accommodates only 7 to 9 tons of dry micro silica and requires 20 to 50 percent more time for discharging.
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There's a lot the average person doesn't know about concrete. It's porous; it's the world's most-used material after water; and it's not cement. MIT's Concrete Sustainability Hub describes the world's most consumed construction material and its environmental impact.
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The abrasion erosion characteristics of concrete made from moderate heat Portland cement, fly ash, and silica fume were investigated via sandblasting …
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The proper concrete mixing ratios are 1:2:3, 1:3:3, 1:2:4 for cement, sand, and stone. Mixing ratios are based on what psi concrete you need. Mixing ratio chart
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