浸泡法强化再生混凝土抗碳化试验研究  

Experimental study on carbonation resistance of recycled concrete coarse aggregate on strengthening

作　　者：朱从香[1,2] 杨鼎宜 许飞[1] 郑娟[1] 王虹[3] 

机构地区：[1]江海职业技术学院,江苏扬州225101 [2]扬州大学,江苏扬州225009 [3]泰州职业技术学院,江苏泰州225300

出　　处：《混凝土》2012年第9期65-68,共4页Concrete

基　　金："十二五"国家支撑计划项目(2012BAJ20B01-06)

摘　　要：由于再生粗骨料孔隙率高、内部产生的微细裂缝多,导致再生粗骨料强度低,进而导致其配置的再生混凝土的抗碳化能力大幅下降。为了提高粗骨料的基本性能,采用3种化学浸泡浆液对粗骨料进行浸泡修复,分析不同处理的粗骨料配置的再生混凝土的强度和微观结构的发展变化,并研究对抗碳化性能的影响。试验分析表明:经过强化处理的再生粗骨料配置的再生混凝土内部更加致密,其抗碳化性能都有了一定的提高。Because of the high porosity and many microscopic checked, the strength of recycled coarse aggregate was low, then the carbonation resistance of recycled concrete also decreased a lot.In order to improve the basic performance of recycled coarse aggregate, three kinds of chemical agents were used to repair deficiency in the recycled coarse aggregate.Based on the research, the development situations of strength and the mi- crostrncture in the recycled concrete which used different chemical agents were researched, and the effect on resistance ability were also analy- sised.Both theory and experiment study showed that, the internal microstructure of recycled concrete which used recycled coarse aggregate became more dense, and the resistance ability was also improved.

关 键 词：再生粗骨料 化学浆液 强化试验 再生混凝土 抗碳化性能 微观结构 

分 类 号：TU528.041[建筑科学—建筑技术科学]