机制砂混凝土在高温后的强度和耐久性研究  

Study on the strength and durability of concrete with manufactured-sand under condition of high temperature

作　　者：陈正发[1] 刘桂凤[1] 徐建民 

机构地区：[1]山东理工大学建筑工程学院,山东淄博255049 [2]山东凝易固砂浆科技有限公司,山东淄博255051

出　　处：《混凝土》2011年第10期46-48,共3页Concrete

基　　金：山东省自然科学基金项目(ZR2009FM020);国家自然科学基金项目(50709031)

摘　　要：在对原材料性能测试和混凝土配合比试验的基础上,对C30机制砂混凝土开展了高温后的强度和耐久性试验研究。对比研究了高温后无腐蚀,高温后酸腐蚀和高温后碱腐蚀3种情况下机制砂混凝土的强度和相对动弹模量的变化规律。试验结果表明机制砂混凝土在高温后,抗压强度和相对动弹模量都显著降低,并随温度的增加降低的幅度有增大趋势;机制砂混凝土在高温后,耐酸、碱性侵蚀等的耐久性能明显减弱,且经受的温度越高其耐酸、碱性侵蚀的能力越低,以耐酸侵蚀的能力最低。Experiment studies on C30 concrete with manufactured-sand were carried out under condition of high temperature,which based on the testing of raw material performance and concrete mix ration.A comparative study on the changing laws of the strength and the relative dynamic elastic modulus of concrete was made in three cases which were high temperature, acid corrosion following after high temperature and alkali corrosion following after high temperature.The results of tests indicated that the strength and the relative dynamic elastic modulus of concrete with manufactured-sand decreased markedly with the increasing of temperature.The durability of acid and alkali-resistant of concrete with manufactured-sand was also remarkably weakened due to the action of high temperature.The capability of acid and alkali-resistant of the concrete was weaker and weaker with the increasing of temperature, especially the anti-acid capability.

关 键 词：机制砂混凝土 高温 强度 耐久性 

分 类 号：TU528.041[建筑科学—建筑技术科学]