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Water-Soluble Super Absorbent Polymer as Self-curing Agents in High-Strength Cement Concrete Mixes
The ordinary Portland cement is mixed with various mineral admixtures to produce high strength concrete. Mineral admixtures like microsilica and metakaolin are well-known supplementary cementitious materials. Metakaolin is derived from natural pozollanic material named as kaolin clays; many researchers had tried it to produce high strength concrete. Concrete produced using such natural pozollana and of low water–cement ratio might not have enough water for hydration process. It would affect adversely the properties of concrete. In this study, high strength concrete is produced using metakaolin and mixed with superabsorbent polymer (SAP) to fulfill the demand of water during hydration process. It also examines the effect of SAP on the mechanical properties of concrete. The study includes use of two types of polymers commercially available, namely polyvinyl alcohol (PVA) and polyacrylic acid (PAA). Concrete is mixed with both types of polymers separately. Concrete specimens are cast by using SAP and without SAP and cured under different curing regime conditions. Polymers are added in varying percentages from 0.2 to 1.0% by the weight of cement. The test results reveal that 0.4% by the weight of cement is the optimum dose of PVA which produces strength that nearly equals to the strength of the control mix and for the same dose of PAA, the strength obtained is about fifty percent of the strength of the control mix. As the strength gets reduces by the addition of polyacrylic acid, this paper aims to describe the effect of polyvinyl alcohol and polyacrylic acid in combination on the properties of concrete. The study reveals that use of superabsorbent polymers in combination and in lesser percentages is more effective in water retention and strength enhancement as compared to air-cured mixes (No curing).
Water-Soluble Super Absorbent Polymer as Self-curing Agents in High-Strength Cement Concrete Mixes
The ordinary Portland cement is mixed with various mineral admixtures to produce high strength concrete. Mineral admixtures like microsilica and metakaolin are well-known supplementary cementitious materials. Metakaolin is derived from natural pozollanic material named as kaolin clays; many researchers had tried it to produce high strength concrete. Concrete produced using such natural pozollana and of low water–cement ratio might not have enough water for hydration process. It would affect adversely the properties of concrete. In this study, high strength concrete is produced using metakaolin and mixed with superabsorbent polymer (SAP) to fulfill the demand of water during hydration process. It also examines the effect of SAP on the mechanical properties of concrete. The study includes use of two types of polymers commercially available, namely polyvinyl alcohol (PVA) and polyacrylic acid (PAA). Concrete is mixed with both types of polymers separately. Concrete specimens are cast by using SAP and without SAP and cured under different curing regime conditions. Polymers are added in varying percentages from 0.2 to 1.0% by the weight of cement. The test results reveal that 0.4% by the weight of cement is the optimum dose of PVA which produces strength that nearly equals to the strength of the control mix and for the same dose of PAA, the strength obtained is about fifty percent of the strength of the control mix. As the strength gets reduces by the addition of polyacrylic acid, this paper aims to describe the effect of polyvinyl alcohol and polyacrylic acid in combination on the properties of concrete. The study reveals that use of superabsorbent polymers in combination and in lesser percentages is more effective in water retention and strength enhancement as compared to air-cured mixes (No curing).
Water-Soluble Super Absorbent Polymer as Self-curing Agents in High-Strength Cement Concrete Mixes
Lecture Notes in Civil Engineering
Prashant, Amit (editor) / Sachan, Ajanta (editor) / Desai, Chandrakant S. (editor) / Suryawanshi, N. T. (author) / Thakare, S. B. (author)
2020-03-12
11 pages
Article/Chapter (Book)
Electronic Resource
English
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