摘要
抗冻性是评价混凝土耐久性的重要指标,因此提高再生混凝土的抗冻性是国内外学者的研究热点.在总结目前再生混凝土现存问题的基础上,通过对国内外学者的研究进行深入分析总结出再生混凝土抗冻性的影响因素:(1)再生骨料取代率对再生混凝土的抗冻性有较大影响;(2)降低水灰比可以提高再生混凝土抵抗冻坏的性能;(3)选择合适的矿物掺合料可以改善再生混凝土抵抗冻坏的性能;(4)加入外加剂可提高再生混凝土的抵抗冻坏的性能.最后,提出了在实际工程中提高再生混凝土抗冻性的有效技术措施.
Frost resistance is an important index for evaluating the durability of concrete,so improving the frost resistance of recycled concrete is a research hotspot of domestic and foreign scholars.On the basis of summarizing the existing problems of recycled concrete,the influencing factors of frost resistance of recycled concrete are summarized through in-depth analysis of the research of domestic and foreign scholars(1)The replacement rate of recycled aggregate has great influence on the frost resistance of recycled concrete.(2)Reducing water cement ratio can improve the frost resistance of recycled concrete.(3)Selection of appropriate mineral admixtures can improve the frost resistance of recycled concrete.(4)Adding admixtures can improve the frost resistance of recycled concrete.Finally,the effective technical measures to improve the frost resistance of recycled concrete in practical engineering are put forward.
作者
白亚东
黄志强
付旭
王大光
BAI Yadong;HUANG Zhiqiang;FU Xu;WANG Daguang(School of Architecture and Civil Engineering,Shenyang University of Technology,Shenyang 110870,China;Institute of Architectural Engineering,North China Institute of Aerospace Engineering,Langfang 065000,China)
出处
《混凝土》
CAS
北大核心
2020年第6期98-101,105,共5页
Concrete
基金
国家自然科学基金项目(51474050)
河北省高等学校科学技术研究项目(QN2017003)
河北省建设科技研究指导性计划项目(20182051)。
关键词
再生混凝土
抗冻性
再生骨料
水灰比
矿物掺合料
外加剂
recycled concrete
frost resistance
recycled aggregate
water cement ratio
mineral admixtures
admixtures
