掺钢渣-矿渣-粉煤灰复合微粉混凝土的高温性能研究

Research on high temperature performance of composite micropowde concrete mixed by steel slag,slag and fly ash

为了更好、更安全地利用工业废渣,本文研究了钢渣-矿渣-粉煤灰复合微粉混凝土高温后的性能,以不同掺量的4种复合微粉混凝土为研究对象,分析了复合微粉种类和掺量对混凝土高温后性能的影响。试验研究表明:复合微粉的加入都会使混凝土的失重率变大。对于以钢渣或粉煤灰为主的复合微粉混凝土,复合微粉掺量与混凝土的残余抗压强度和静弹性模量负相关。对于以矿渣为主的复合微粉混凝土,复合微粉掺量与混凝土的残余抗压强度和静弹性模量先正相关后负相关。

In order to better and safer use the industrial waste slag in architecture,the paper studied the high temperature property of composite micropowder concrete with steel slag,powder slag and of fly ash.Taking four different kinds of composite powders as research object,it analyzed the effect of composite powder type and dosage on the high temperature back properties of concrete. The results show that the addition of composite powder to concrete will increase weight loss rate. For the composite powder concrete mainly with steel slag or fly ash,the mixture amount of composite powder has negative relation with the residual compressive strength of concrete and static elastic modulus. For the composite powder concrete mainly with slag,the composite powder content has positive relation first and then negative relation with the residual compressive strength of concrete and static elastic modulus.