橡胶混凝土耐热性能及抗碳化性能研究  

Study on the Heat Resistance and Carbonation Resistance of Rubber Concrete

作　　者：李科成 王随原[2] 阚列 

机构地区：[1]重庆建筑工程职业学院建筑经济系,重庆400072 [2]交通运输部公路科学研究院,北京100088 [3]重庆新城建设造价事务所有限责任公司,重庆401121

出　　处：《公路工程》2015年第3期130-133,138,共5页Highway Engineering

基　　金："十二五"科技支撑计划(2012BAJ17B01)

摘　　要：为了研究橡胶混凝土的耐热性能和抗碳化性能,通过试验研究了橡胶粉掺量和受热温度对混凝土质量损失和抗压强度的影响,以及橡胶粉掺量和碳化时间对碳化后混凝土碳化深度、和强度指标的影响。试验结果表明,随受热温度的升高和橡胶粉掺量的增大,质量损失逐渐增大,而抗压强度逐渐减小,其中当受热温度大于600℃时橡胶混凝土的耐热性能大幅降低;各橡胶粉掺量下抗压强度和受热温度之间有很好的线性相关性,其中加入橡胶粉后︱A︱增大,混凝土温度敏感性增强。橡胶粉对碳化深度、碳化后抗压强度和抗折强度的影响规律不明显,当掺量小于10%时,混凝土碳化主要发生在14 d之后,而当掺量大于20%时碳化从7 d开始加速;橡胶粉掺量越多,碳化后混凝土折压比越大,混凝土弯曲韧性越好。In order to study the heat resistance and carbonation resistance of rubber concrete,this paper through test studyed the effect of rubber powder content and heating temperature on the quality loss and compressive strength of concrete,and studied the effect of rubber powder content and carbonization time on carbonation depth and intensity of concrete after carbonation too. The results show that,with the increase of the heating temperature and rubber powder content,the mass loss increased while compressive strength decreased gradully,and when the heating temperature is greater than 600 ℃,heat resistance of rubber concrete reduced significantly; There was a good linear correlation between compressive strength and heating temperature,added rubber powder increased ︱A︱,and reinforced the temperature sensitivity concrete. The influence of rubber powder on the carbonation depth,compressive strength and flexural strength after carbonation is not obvious,when the content is less than 10%,the carbonization of concrete occurs mainly in the 14 d,but when the content is greater than 20%,carbonation accelerated from 7 d;The more the rubber powder content,the greater the pressure ratio of folded after concrete carbonation,bending toughness better.

关 键 词：橡胶混凝土 橡胶粉 耐热性能 抗碳化性能 

分 类 号：U414.1[交通运输工程—道路与铁道工程]