Presenter Information

Yubo PanFollow

Abstract

With the technology of the Mineral Admixtures’ application in Cement-based materials becoming mature, the superfinezied of mineral admixtures has also become a trend . After superfinezied, the hydration activity of the mineral admixtures is greatly improved, while increasing the degree of structural compactness of Cement-based materials ,improving the workability of Cement-based materials. The mineral admixtures applying to concrete materials after superfinezied, which has a certain improvement effect on the performance of concrete. In this paper, the effect of superfinezied mineral admixture on the workability of dry hard concrete and the high performance concrete was investigated. The proportion of ultra-fine composite mineral admixture replacing cement was 0, 20% and 30% respectively, and the workability of concrete was characterized by compressive strength, flexural strength and slump. Meanwhile,the effect of ultra-fine mineral admixture on the hydration products of concrete was characterized by Quantitative XRD. According to the experimental results, the ultra-fine mineral admixture can significantly increase the mechanical strength of concrete, reduce the water requirement of concrete and improve the flowability of concrete materials. The clinker content in the hydration products was significantly consumed, accelerating the hydration of C2S and C3S in the cement.

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Effect of ultra-fine composite Mineral Admixtures on the Mechanical Properties and Slump of Concrete

With the technology of the Mineral Admixtures’ application in Cement-based materials becoming mature, the superfinezied of mineral admixtures has also become a trend . After superfinezied, the hydration activity of the mineral admixtures is greatly improved, while increasing the degree of structural compactness of Cement-based materials ,improving the workability of Cement-based materials. The mineral admixtures applying to concrete materials after superfinezied, which has a certain improvement effect on the performance of concrete. In this paper, the effect of superfinezied mineral admixture on the workability of dry hard concrete and the high performance concrete was investigated. The proportion of ultra-fine composite mineral admixture replacing cement was 0, 20% and 30% respectively, and the workability of concrete was characterized by compressive strength, flexural strength and slump. Meanwhile,the effect of ultra-fine mineral admixture on the hydration products of concrete was characterized by Quantitative XRD. According to the experimental results, the ultra-fine mineral admixture can significantly increase the mechanical strength of concrete, reduce the water requirement of concrete and improve the flowability of concrete materials. The clinker content in the hydration products was significantly consumed, accelerating the hydration of C2S and C3S in the cement.