Effect of particle size distribution of slag on the strength and pore structure of low-temperature concrete

Abstract

In order to study the effect of particle size distribution of slag on strength and pore structure of the concrete at low temperature, the particle sizes of slag were divided into four grades, namely, 5∼10 μm, 10∼15 μm, 15∼20 μm and 20∼26 μm. The influence of particle size distribution of slag on the compressive strength and pore structure of low temperature concrete cured for 3 days, 7 days and 14 days were analyzed. The results show that different particle size distribution of slag leads to different pore structure and strength of concrete. When the slag with the size is of 10∼15μm, the concrete obtains the best performance, regardless of curing temperature. In addition, the decreasing granularity of slag improves the pore structure and increases the density of concrete.