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Research Article

JCR. 2020; 7(12): 3669-3673


NEW COMPLEX ADMIXTURE FOR HIGH-STRENGTH CONCRETE

Valentina Solovyova, Sergey Kasatkin, Abu-Khasan Mahmud, Dmitry Solovyov.

Abstract
This study aims to develop a complex admixture for the concrete used in high-voltage transmission structures. It is suggested that a combination of polycarboxylate polymer, silica sol and a high molecular weight component can improve concrete properties, such as compressive strength and tensile strength in bending, freeze resistance, integral waterproofing, and corrosive resistance. The experimental use of this complex admixture in concrete proved that the combined effect improves the compressive strength by 58% and tensile strength in bending by 88%. Density of the hardened concrete is enhanced by 29% and durability generally doubles. The findings of this study appear practical as they justify reducing of the consumption of reinforcement in concrete by 22% or, in case of the same reinforcing, reducing the consumption of cement by 24%.

Key words: chemical admixture, high-strength concrete, strength, durability, crack growth, compression zone, corrosion resistance.



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