A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Latex modified high performance concrete
The objective of the present research work was to know the comparative behaviour of normal and SBR latex modified concrete (LMC) in terms of strength, chemical resistance, pore sizes and their distributions and SEM studies mainly at the advanced age of two years. Styrene Butadiene Rubber (SBR) Latex is a good concrete additive, which gives sufficient workability at much reduced water-cement ratios and fills voids and capillaries in the products of hydration by a process, called polymerization. Specimens were tested for compressive strength and modulus of rupture at the ages of 28 days and two years. Pore sizes, their distribution and chemical resistance of normal and LMC for different polymer cement ratios (P/C) were studied at two years age by using Olympus PME-3 inverted metallurgical microscope and scanning electron microscope (SEM). Chemical resistance of normal and modified concrete specimens were tested, in the light of international research work on LMC against three N/2commercial grade acid solutions of HCL, H2SO4 and HNO3. The salts were sodium carbonate and ammonium sulphate in the shape of saturated solutions. Results indicated that compressive strength of concrete decreased with increasing P/C ratio, which can be offset by further reducing W /C ratio, the pore sizes got reduced and their distributions got scattered with increased chemical resistance. The thickness of polymer chains increased with an increase in polymer dispersion and at 20% P/C ratio of SBR latex, random 3D interwoven polymer chains obtained significant thicknesses and growth which is responsible for the high performance of LMC.
Latex modified high performance concrete
The objective of the present research work was to know the comparative behaviour of normal and SBR latex modified concrete (LMC) in terms of strength, chemical resistance, pore sizes and their distributions and SEM studies mainly at the advanced age of two years. Styrene Butadiene Rubber (SBR) Latex is a good concrete additive, which gives sufficient workability at much reduced water-cement ratios and fills voids and capillaries in the products of hydration by a process, called polymerization. Specimens were tested for compressive strength and modulus of rupture at the ages of 28 days and two years. Pore sizes, their distribution and chemical resistance of normal and LMC for different polymer cement ratios (P/C) were studied at two years age by using Olympus PME-3 inverted metallurgical microscope and scanning electron microscope (SEM). Chemical resistance of normal and modified concrete specimens were tested, in the light of international research work on LMC against three N/2commercial grade acid solutions of HCL, H2SO4 and HNO3. The salts were sodium carbonate and ammonium sulphate in the shape of saturated solutions. Results indicated that compressive strength of concrete decreased with increasing P/C ratio, which can be offset by further reducing W /C ratio, the pore sizes got reduced and their distributions got scattered with increased chemical resistance. The thickness of polymer chains increased with an increase in polymer dispersion and at 20% P/C ratio of SBR latex, random 3D interwoven polymer chains obtained significant thicknesses and growth which is responsible for the high performance of LMC.
Latex modified high performance concrete
Latex-modifizierter Hochleistungsbeton
Rizwan, S.A. (author) / Hameed, A. (author) / Ahmad, K. (author)
2002
12 Seiten, 6 Bilder, 7 Tabellen, 12 Quellen
Conference paper
English
Latex Modified High Performance Concrete
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