Research on performance of carboxylic acid concrete

Abstract

The changing tendency of concrete performance is derived from the effect of admixture, water-cement ratio and fibre. In the case for a same water-cement ratio, adding water reducer, the concrete shrinkage will increase significantly. While a carboxylic acid concrete adding 15% fly ash, its shrinkage is basically same with non-adding fly ash concrete. With the increase of the fly ash addition to 25%, the concrete shrinkage will become obviously. It leads to the rapid expansion of the initial volume of hydration after mixing slag. The shrinkage of concrete is not very obvious after adding alkali-resistant glass fibre. Owing to increasing the tensile strength of concrete, the anti-crack effect is obvious. It increases the shrinkage of concrete in the long time. The shrinkage tendency of the carboxylic acid concrete increases, when the water-cement ratio reduces. The lower is the water-cement ratio, the more obvious is the early contraction.