超声回弹综合法在混合骨料混凝土中应用试验研究  

Experimental Study on the Application of Ultrasonic-rebound Combined Method in Specified Density Concrete

作　　者：杨文慧[1] 李晓丽[1] 

机构地区：[1]内蒙古农业大学水利与土木建筑工程学院,呼和浩特010018

出　　处：《硅酸盐通报》2013年第6期1119-1125,共7页Bulletin of the Chinese Ceramic Society

基　　金：内蒙古自治区自然科学基金项目(2009MS0705)

摘　　要：本文以内蒙古锡林浩特地区富含的天然浮石作为轻骨料,以体积分数0%、15%、20%、30%、50%的轻骨料替代粗骨料,同时以质量分数0%、15%、25%、35%的粉煤灰替代水泥,制备混合骨料混凝土,研究浮石的取代率、粉煤灰的掺量以及龄期对混合骨料混凝土抗压强度、回弹值及超声波速的影响规律。结果表明:用体积分数为15%的浮石部分替代普通粗骨料,并掺入25%的粉煤灰可以提高混凝土的抗压强度,并且抗压强度、回弹值及超声波速三者之间存在一定的相关关系,由此建立更适合于混合骨料混凝土的超声回弹综合法测强公式。Taking natural pumice largely existing in the region of Xilinhot in Inner Mongolia as light aggregate,which was substituted for coarse aggregate in the volume fractions of 0%,15%,20%,30% and 50%,and cement was replaced with fly ash in the volume fractions of 0%,15%,25% and 35%,made specified density concrete.Then we studied the influence law of the different replacement rate of pumice,the different replacement amount of fly ash and the curing age on compressive strength,rebound value and ultrasonic velocity of specified density concrete.The research shows that it can increase strength of concrete and there is correlativity among compressive strength,rebound value and ultrasonic velocity while the substitution rate of pumice is 15% and the replacement rate of fly ash is 25%.So strength curve which was more suitable for specified density concrete was established in this paper.

关 键 词：混合骨料混凝土 抗压强度 回弹值 超声波速 

分 类 号：TU528[建筑科学—建筑技术科学]