Mix proportion design method and experiment of self-compacting concrete
01 Jan 2009-
TL;DR: In this article, a mix design method for self-compacting concrete is proposed with detailed procedure, an experimental study on the mix was made, the span of parameters was determined in the method.
Abstract: A mix design method for self-compacting concrete is proposed with detailed procedure.Based on the method,an experimental study on the mix was made,the span of parameters was determined in the method.The effects of factors on the concrete strength are analyzed with orthogonal test.
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TL;DR: In this paper, the influence of mineral admixtures on workability of fresh concrete and chloride ion permeability resistance of hardened concrete for C50 self-compacting concrete was investigated by means of the Natural Immersion Test.
Abstract: The influence of mineral admixtures on workability of fresh concrete and chloride ion permeability resistance of hardened concrete for C50 self-compacting concrete was investigated by means of the Natural Immersion Test. The results showed that the chloride diffusion coefficient in fly ash concrete decreased first and then increased with increasing fly ash content in cementitious materials, when fly ash content was 30% or 40%, it got the lowest value at 28 days or 90 days, respectively. The chloride diffusion coefficient in specimens decreased with increasing the ground granulated blast furnace slag content in cementitious materials, but it changed little when the replacement was in ranges of 50% to 60%. Furthermore, for the specimens which replaced by fly ash and ground granulated blast furnace slag, the chloride diffusion coefficient decreased first and then increased with increasing the fly ash content in complex cementitious, and when fly ash content was 10% or 20%, it got the lowest value at 28 days or 90 days, respectively.
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