文献类型：期刊文献

中文题名：CO_(2)强化再生骨料的特性及其对再生混凝土性能的影响

英文题名：Properties of CO_(2)-modified recycled aggregates and its effect on the performance of recycled aggregate concrete

作者：高越青[1];潘碧豪[1];梁超锋[1,3];肖建庄[3];何智海[1,2]

机构：[1]绍兴文理学院土木工程学院,浙江绍兴312000;[2]绍兴文理学院浙江省岩石力学与地质灾害重点实验室,浙江绍兴312000;[3]同济大学土木工程学院,上海200092

年份：2021

卷号：43

期号：6

起止页码：95

中文期刊名：土木与环境工程学报（中英文）

外文期刊名：Journal of Civil and Environmental Engineering

收录：CSTPCD、、Scopus、北大核心、CSCD、北大核心2020、CSCD_E2021_2022

基金：国家自然科学中巴联合基金(51661145023);浙江省自然科学基金(LY20E080012);绍兴市科技计划创新项目(2018C30007)。

语种：中文

中文关键词：再生骨料;再生骨料混凝土;CO_(2)强化;CO_(2)吸收率;残留CO_(2)

外文关键词：recycled aggregate;recycled aggregate concrete;CO_(2)modification;CO_(2)absorption;residual CO_(2)content

中文摘要：CO_(2)强化不同品质和粒径再生骨料的特性研究尚不系统和完善。在约20%CO_(2)浓度和自然环境压力条件下,考虑再生粗骨料(RCA)品质和粒径的影响,试验测试了CO_(2)强化再生骨料(CRCA)的碳化率、CO_(2)吸收率、碱度、残留CO_(2)气体含量、吸水率及CO_(2)强化再生骨料混凝土(CRAC)的抗压强度和抗氯离子渗透性能。结果表明:CO_(2)强化再生骨料的碳化率和CO_(2)吸收率随再生骨料水灰比的增加而增加;CO_(2)强化显著降低了再生骨料的碱度,且CO_(2)强化再生骨料粒径越小、水灰比越低,其残留CO_(2)气体含量越高;CO_(2)强化显著降低了再生骨料的吸水率,明显提升CO_(2)强化再生骨料混凝土的抗压强度和抗氯离子渗透性能。

外文摘要：The properties of CO_(2)-modified recycled aggregates with different qualities and particle sizes have not been investigated systematically and comprehensively.In the conditions of 20%CO_(2)concentration and natural environmental pressure,considering the effect of recycled coarse aggregate(RCA)quality and particle size,the carbonization rate,CO_(2)absorption,alkalinity,water absorption of CO_(2)-modified recycled coarse aggregate(CRCA)and residual CO_(2)content in CRCA were investigated;the compressive strength and chloride penetration resistance of CO_(2)-modified recycled coarse aggregate concrete(CRAC)were also evaluated.The results show that the carbonization rate and CO_(2)absorption of CRCA increase with the increase of CRCA water-cement ratio;the CO_(2)modification significantly reduces the alkalinity of RCA;the smaller particle size and lower water-cement ratio of CRCA,the more CO_(2)sequestrates in CRCA;the CO_(2)modification remarkably reduces the water absorption of CRCA and significantly improves the compressive strengths and chloride penetration resistance of CRAC.