不同强度等级的高品质再生细骨料混凝土试验研究  

Experimental study on high quality recycled fine aggregate concrete with different strength grades

作　　者：聂立武[1] 韩古月[1] 滕毓晨 

机构地区：[1]辽宁建筑职业学院,辽宁辽阳111000 [2]中建三局集团有限公司东北分公司,辽宁沈阳110179

出　　处：《混凝土》2017年第11期118-121,共4页Concrete

基　　金：住房城乡建设部2016年科学技术项目计划(2016-R3-003);辽宁省自然科学基金资助项目(201202097);辽宁省教育厅科技计划项目(L2014584)

摘　　要：为扩大再生细骨料的工程使用规模,采用高品质再生细骨料制备再生混凝土,重点研究强度等级和再生细骨料取代率对高品质再生细骨料混凝土性能的影响。结果表明:随着强度等级的增加,高品质再生细骨料混凝土的抗压强度和抗氯离子渗透性能均逐渐增强,而用水量呈现出先减小后增大的趋势;随着再生细骨料取代率的增大,其用水量增多,抗压强度和抗氯离子渗透性能均逐渐降低;当再生细骨料的取代率为100%时,用水量最大增幅为8.0%,28 d抗压强度最大降幅为9.6%,氯离子扩散系数最大增加了0.52×10^(-12)m^2/s。In order to enlarge the scale of recycled fine aggregate,the recycled concrete was prepared by high quality recycled aggregate,and focus on the effect of strength grade and recycled fine aggregate replacement rate on the properties of high quality recycled fine aggregate concrete.The results showed that the compressive strength and resistance to chloride ion permeability of high quality recycled fine aggregate concrete are increased with the increase of the strength grade,while the water consumption showed first decreased and then increased.The water consumption of high quality recycled fine aggregate concrete increases with the decrease of the replacement rate of recycled fine aggregate,and the compressive strength and chloride ion permeability decreases gradually.When the replacement rate of recy cled fine aggregate is 100%,the maximum increased of water consumption is 8%,and the maximum decline of compressive strength of28 d is 9.6%,and the chloride diffusion coefficient maximum increased by 0.52×10^（-12） m^2/s.

关 键 词：再生细骨料混凝土 取代率 强度等级 用水量 抗压强度 抗氯离子渗透 

分 类 号：TU528.04[建筑科学—建筑技术科学]