再生混凝土抗碳化性能试验研究  

TEST AND RESEARCH ON CARBONIZATION RESISTANCE OF RECLAIMED CONCRETE

作　　者：袁娟[1] 郭樟根[1] 彭阳[1] 吴灿炜 

机构地区：[1]南京工业大学土木工程院,南京210009

出　　处：《建筑技术开发》2014年第4期60-63,共4页Building Technology Development

基　　金：国家自然科学基金(50708045);江苏省六大人才高峰资助项目

摘　　要：为了研究再生混凝土的抗碳化性能,系统分析了水灰比、水泥用量、再生骨料取代率、原始混凝土强度及矿物掺合料等对再生混凝土碳化深度的影响规律,并采用有限元方法对再生混凝土的碳化进行了数值模拟。研究结果表明:再生混凝土的抗碳化性能在相同水灰比的条件下略低于普通混凝土,再生混凝土的抗碳化性能不仅受水灰比和水泥用量的影响,还受到再生粗骨料取代率及其强度的影响,再生混凝土碳化深度与碳化时间的平方根成正比,在一定范围内添加矿物掺和料可降低再生混凝土的碳化深度。To study the carbonization resistance of reclaimed concrete, systematic analysis is made on the influencing law of water - cement ratio, cement content, reclaimed aggregate replacing ratio, original concrete strength and mineral ag- gregate on carbonization depth of reclaimed concrete, and finite element method is adopted for numerical simulation of carbonization of reclaimed concrete. The research result indicates that carbonization resistance of reclaimed con- crete is slightly lower than ordinary concrete under the same water - cement ratio; carbonization resistance of re- claimed concrete is influenced not only by water - cement ratio and cement content, but also by replacing ratio and strength of reclaimed aggregate; carbonization depth of reclaimed concrete is in a positive proportion to the square root of carbonization time; mineral mixture within a certain range could reduce the carbonization depth of reclaimed concrete.

关 键 词：再生混凝土 碳化 水灰比 

分 类 号：TU528[建筑科学—建筑技术科学]