Advantage And Disadvantage Of Silicate

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Abstract: As concrete is the most commonly used material in construction, improvement of cementitious material become more and more essential. The advancement of concrete technology can reduce the consumption of natural resources and energy sources and lessen the burden of pollutants on environment. Presently large amounts of silica fume and steel slag are generated in industries with an impact on environment and humans. Conventional concrete has two major drawbacks: low tensile strength and a destructive and brittle failure. In an attempt to increase concrete ductility and energy absorption, fibre reinforced concrete has been introduced. The present investigation revealed the effect of using silica fume and steel slag as a partial replacement…show more content…
Most of the increase in cement demand could be met by the use of supplementary cementing materials, in order to reduce the green gas emission. If alternative cheap cement can be produced locally, the demand for portland cement will reduce. Industrial wastes, such as silica fume, blast furnance slag, fly ash are being used as supplementary cement replacement materials and recently, agricultural wastes are also being used as pozzolanic materials in concrete. When pozzolanic materials are incorporated to concrete, the silica present in these materials react with the calcium hydroxide released during the hydration of cement and forms additional calcium silicate hydrate (C – S – H ), which improve durability and the mechanical properties of…show more content…
From the above table 7.4 , the highest compressive strength was achieved by 10% replacement of cement, which was found about 26.79 Mpa compared with 24.18 Mpa for the control mixture at 7days. This means there is an increase in the strength of almost 11.20% compared to the control mix at 7 days. Also it was found that there is an increase in strength of almost 18% compared to the control mix at 14 days. Increase in strength was from 29.76 Mpa to 34.64Mpa for the control mixture at 14 days. The increase in the strength of 28 days was almost 16.31% compared to the control mix. It was found that increase in strength was about 41.23 Mpa compared with 37.20Mpa for the control mixture at 28 days. b) SPLIT TENSILE TEST RESULTS Table 9 Split tensile strength % of 7 days 14 days 28 days replacement Normal concrete 1.82 2.24 2.80 BC1 2.18 2.68 3.36 BC2 2.53 3.12 3.90 BC3 2.32 2.86
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