高掺量低品质粉煤灰混凝土碳化性能的试验研究  

Experimental Research on the Carbonation Performance of Concrete with High Content and Low Quality Fly Ash

作　　者：王卓琳[1,2] 施钟毅[2] 姚利君[2] 许清风[1,2] 贡春成[1,2] 

机构地区：[1]上海市工程结构安全重点实验室,上海200032 [2]上海市建筑科学研究院(集团)有限公司,上海200032

出　　处：《粉煤灰综合利用》2015年第3期12-16,共5页Fly Ash Comprehensive Utilization

基　　金：上海市科委青年科技启明星项目(13QB1403000)

摘　　要：进行了掺加不同品质和掺量粉煤灰、复掺矿渣粉的粉煤灰混凝土的快速碳化试验研究。结果表明,低品质粉煤灰掺量越多,越不利于混凝土抗碳化性能;20%以下掺量时,混凝土碳化深度不会显著增加;48%掺量时,混凝土抗碳化性能明显降低;在混凝土中复掺矿渣粉可以大大改善粉煤灰混凝土的抗碳化性能。提出了复掺矿渣粉的高掺量低品质粉煤灰混凝土配合比设计方法,不仅对提高粉煤灰混凝土抗压强度有利,并且可大大改善其抗碳化性能。The carbonation performance of fly ash concrete was tested,with the effect of fly ash quality,admixtures content,multi-mineral admixtures and so on. The results showed that the carbonation resistance of concrete decreased with the increase of low quality fly ash content. The carbonation resistance was not significantly reduced if the low quality fly ash content was less than 20%. When the low quality fly ash content was48%,the carbonation depth increased greatly. The carbonation resistance of fly ash concrete could be greatly improved by mixing slag powder. The mix proportion design method of the high content and low quality fly ash concrete is suggested to improve the compressive strength and the carbonation resistance of fly ash concrete.

关 键 词：粉煤灰 低品质 碳化 矿渣粉 配合比 

分 类 号：TU528.041[建筑科学—建筑技术科学]