玻璃骨料自密实混凝土工作性能及高温性能研究

Study on the performance and high temperature performance of glass aggregate self-compacting concrete

为研究改性玻璃骨料自密实混凝土(SCC)的性能,采用不同体积替代率的玻璃替代传统骨料配制混凝土,并进行工作性能、强度试验、耐火试验等测试新拌自密实混凝土的性能。结果表明:自密实混凝土中掺入玻璃能改善混凝土的流动性;改性后的自密实混凝土,玻璃掺量在10%～30%时7 d龄期强度高于普通混凝土,表现出早强性;高温试验中,300℃以下对混凝土强度影响较小,500℃时,混凝土强度损失30%左右,温度达到700℃时,强度损失率接近70%,0～30%玻璃掺量混凝土与传统骨料混凝土性能相似,40%玻璃骨料配制的混凝土具有较好的耐火性能。

In order to study the performance of modified glass aggregate self-compacting concrete,the concrete with different volume replacement rate was used instead of the traditional aggregate to make concrete,and the working performance,strength test and fire test were used to test the performance of the new self-compacting concrete.The results show that the fluidity of self-compacting concrete mixing glass can improve concrete;modified self-compacting concrete of the glass content in the 10%~30% 7 d age strength stronger than ordinary concrete,showed early strength;high temperature test,and 300 ℃ on the strength of concrete has no effect,500 ℃.The strength of concrete,the loss of about 30%,the temperature reached 700 ℃,the strength loss rate is close to 70%,the performance of 0~30% glass content and traditional concrete aggregate concrete is similar to that of the 40% glass aggregate concrete has good fire resistance.