再生粗骨料强化后混凝土抗碳化试验研究  

Experimental Study of recycled concrete coarse aggregate experimental of carbonation resistance on strengthening

作　　者：朱从香[1] 郑娟[1] 许飞[1] 何霞[2] 王虹[3] 

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

出　　处：《四川建筑科学研究》2012年第6期210-213,218,共5页Sichuan Building Science

摘　　要：再生粗骨料存在孔隙率高、内部产生的微细裂缝多以及强度比较低等缺陷,从而导致再生混凝土抗碳化能力下降。本文首先采用三种化学浆液对粗骨料进行浸泡修复,提高粗骨料的基本性能,进而提高其配置的再生混凝土的强度,同时,结合再生混凝土界面过渡区的微观结构进行研究分析,阐述其对再生混凝土抗碳化能力的影响规律。试验分析表明,再生粗骨料经过强化处理后配置的再生混凝土,其抗碳化性能都有所提高,采用溶液浸泡处理后的再生粗骨料配置的再生混凝土碳化深度更小,抗碳化能力更强。Combined with low intensity of recycled coarse aggregate, water absorption and crushing low indicators big problem, recycled concrete decreased carbonation resistance. The intensified test research on recycled aggregate are carried out by means of physical strengthening and then three different types of chemical grout for immersion and the reasons on weak which exist in the Interfacial Transition Zone（ITZ） of recycled concrete are analyzed. Finally, the law of the carbonation resistance of recycled concrete is found out. Test analysis show that, the carbonation resistance of recycled concrete which combined by the enhanced recycled coarse aggregate increases. The carbonation depth of recycled concrete which combined by the recycled coarse aggregate which immersioned in chemical grout is reduced.

关 键 词：再生粗骨料 化学浆液 强化试验 抗碳化性能 

分 类 号：TU528[建筑科学—建筑技术科学]