江苏大学学报（自然科学版）2017，Vol.38Issue(1)：119-124,6.DOI:10.3969/j.issn.1671-7775.2017.01.021
再生细骨料对混凝土力学及抗冻性能的影响
Influence of recycled fine aggregate on mechanical properties and freeze-thaw resistance of concrete
摘要
Abstract
The normal and the air-entrained concretes with different water-cementmass ratio were designed to investigate the influence of recycled fine aggregate on mechanical properties and freeze-thaw resistance of concrete with different strength grade through varying the replacement rate of recycled fine aggregate.The results show that the compressive strength and the flexural strength of normal concrete markedly decrease with the increasing of replacement ratio of recycled fine aggregate.The compressive strength of air-entrained concrete is obviously decreased with the increasing of replacement ratio of recycled fine aggregate,while the flexural strength is less affected.The resistance to freezing and thawing of concrete with high water-cement ratio (m (water)∶m (cement)=0.52 )is poor with or without recycled fine aggregate.The resistance to freezing and thawing of concrete can be improved with limited extent through adding air-entraining agents.The anti-frost performance of concrete with low water-cement ratio (m(water)∶m(cement)=0.35 )is naturally endowed and is not degraded noticeably by adding recycled fine aggregate.Adding air-entraining agents has little effect for improving the resistance to freezing and thawing. Compared with adding air-entraining agents, the performance of freeze-thaw <br> resistance of recycled fine aggregate concrete can be improved noticeably by decreasing water-cement ratio.关键词
再生细骨料/引气混凝土/抗冻性能/替代率/水灰比Key words
recycled fine aggregate/air-entrained concrete/freeze-thaw resistance/the replacement rate/water-cement ratio分类
建筑与水利引用本文复制引用
张秋美,谢永利,刘保健,汤金涛..再生细骨料对混凝土力学及抗冻性能的影响[J].江苏大学学报（自然科学版）,2017,38(1):119-124,6.基金项目
交通部西部交通建设科技项目（200831800029）；交通运输部科技成果推广项目（2014316T15100）；云南省交通运输厅科技项目（云交科2015（A）12） （）
