Taking the substitution rate of tunnel slag sand in plateau area and the substitution rate of fly ash as variables,through 20 groups of test study the slump,cube compressive strength fcu,splitting tensile strength ft,axial compressive strength fc and elastic modulus Ec of fly ash concrete with tunnel slag sand,and the relationship between age and fcu of fly ash concrete with tunnel slag sand was tested.The results showed that with the increase of substitution rate of tunnel slag sand,when the replacement rate of slag sand is from 0 to 70%,it is beneficial to the mechanical properties of concrete,strength peak when replacement ratio of slag sand is 50%.Fly ash has an adverse effect on the early mechanical properties of concrete.When the age develops to 56 d,the later strength development rate of concrete mixed with fly ash is faster.
关键词
隧道洞渣/粉煤灰/混凝土/坍落度/力学性能/高原地区
Key words
tunnel slag/fly ash/concrete/slump/mechanical properties/plateau area
维普
万方数据