摘要
通过对冻融环境下的再生自密实混凝土进行抗压、劈拉以及动弹性模量试验,以期得到在不同冻融循环次数作用下再生自密实混凝土抗压以及劈拉强度的变化规律。通过试验得到以下结论:再生自密实混凝土的抗冻性能明显低于普通混凝土;再生自密实混凝土的力学强度随冻融循环次数的增加产生大幅的降低;结合微观结构试验,分析冻融环境下再生自密实混凝土与普通混凝土的动弹性模量损失率的发展趋势;根据混凝土的试验结果建立了准确度较高的再生自密实混凝土冻融损伤计算公式。
To obtain the variation of recycled self-compacting concrete compressive and splitting tensile strength with freeze-thaw cycles,the compressive strength,splitting tensile and dynamic elastic modulus test were carried.The following conclusions were obtained through experiments:the frost resistance of recycled concrete was lower than ordinary concrete;the mechanical strength of recycled concrete decreases greatly with the increase of freeze-thaw cycles;the development trend of the dynamic modulus loss rate of recycled concrete was different with ordinary concrete,in the freeze-thaw environment;the formula for calculating freeze-thaw damage of recycled concrete was established based on the test results.
作者
刘传辉
吴婷
LIU Chuan-hui;WU Ting(School of Architectural Engineering and Art Design,Hunan Institute of Technogy,Hengyang 421001,China)
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2018年第8期2640-2645,共6页
Bulletin of the Chinese Ceramic Society
关键词
再生自密实混凝土
力学性能
冻融循环
动弹性模量
recycled self-compacting concrete
mechanical property
freeze-thaw cycle
dynamic modulus of elasticity
