负温混凝土的收缩性能  

SHRINKAGE PERFORMANCE OF MINUS TEMPERATURE CONCRETE

作　　者：邓红卫[1] 李国范[2] 杨少伟[1] 杨英姿[1] 

机构地区：[1]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150001 [2]平顶山工学院土木系,河南平顶山467001

出　　处：《低温建筑技术》2005年第3期1-3,共3页Low Temperature Architecture Technology

摘　　要：研究了负温混凝土在经历了-5℃、-10℃、-15℃及自然变负温(+1℃～-6℃)养护7d,转为正温后的收缩率发展趋势,并与标准养护混凝土的收缩率进行了对比。结果表明,各组负温混凝土的收缩率均小于标准养护混凝土,掺防冻剂的负温混凝土收缩率小于未掺防冻剂负温混凝土,各组负温混凝土的最终收缩率的关系为:-15℃>-10℃>-5℃>自然变负温。After cured at -5℃、-10℃、-15℃ and natural altering minus temperature(+1℃^-6℃)for 7 days,the shrinkage development trend in positive temperature is investigated.It is shown that all the shrinkage of minus temperature concrete is smaller than that of the standard cured concrete.The shrinkage of minus temperature concrete with anti-freezing agent is not as much as the ones without anti-freezing agent.The relationship of final shrinkage of the minus temperature concrete is :-15℃>-10℃>-5℃>natural altering minus temperature.

关 键 词：负温混凝土 收缩 

分 类 号：TU502[建筑科学—建筑技术科学]