再生骨料表面残留附着砂浆含量统计

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中文摘要：再生骨料表面残留的附着砂浆是再生骨料与天然骨料的主要区别,也是劣化其力学性能的根本原因.为了获得再生骨料表面残留的附着砂浆含量,建立了基于图像分析技术的附着砂浆含量统计方法,统计了不同粒径范围内的再生骨料表面附着砂浆含量,系统研究了再生骨料粒径对附着砂浆含量的影响,通过高温-低温循环试验处理同粒径范围的再生骨料,论证了图像分析方法的适用性和可行性.研究结果表明:图像分析方法是一种高效、安全的统计方法,可以用来统计再生骨料表面残留的附着砂浆含量;在骨料粒径为 10.0～31.5 mm内,附着砂浆含量介于 35.94%～38.99%;粒径为 16.0～20.0 mm内的再生骨料表面残留附着砂浆含量最低,相对其他粒径具有较高的质量和性能;在设计再生混凝土配合比时,应适当增加该粒径范围内的再生骨料含量,以降低附着砂浆对再生混凝土力学性能的劣化影响.

外文标题：Statistical of adhered mortar on the surface of recycled aggregate

外文摘要：The adhered mortar on the surface of recycled aggregate is the main difference between the recycled aggregates and natural aggregates,and is also the primary cause of deterioration of its mechanical properties.To obtain the content of adhered mortar on the surface of recycled aggregate,a statistical method of adhered mortar based on the image analysis was established,and the effect of recycled aggregate size on the content of adhered mortar was investigated.Thereafter,the cycle test of high-low temperature was conducted to demonstrate the applicability and feasibility of image analysis method.The research results shown that the image analysis method is an efficient and safe statistical method,which can be used to count the content of adhered mortar on the surface of recycled aggregate;the contents of adhered mortar were between from 35.94%to 38.99%by varying the recycled aggregate size from 10.0 mm to 31.5 mm.In addition,the recycled aggregate with a particle size in the range of from 16.0 mm to 20.0 mm have the lowest content of adhered mortar,and therefore have higher quality and performance compared with other particle sizes.The recycled aggregate percentage in range of this particle size should be increased appropriately during the design of mix proportion,which can reduce the deterioration of the mechanical properties of recycled aggregate concrete by the adhered mortar.

外文关键词：

recycled aggregateadhered mortarimage analysis methodhigh-low temperature test

作者：

胥民尧、王耀、秦煜、侯长超

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作者单位：

盐城工业职业技术学院建筑工程学院,江苏盐城 224005

重庆交通大学土木工程学院,重庆 400074

中铁二院重庆勘察设计研究院有限责任公司,重庆 400023

关键词：

再生骨料附着砂浆图像分析法高温-低温试验

基金：

国家自然科学基金江苏省建筑产业现代化示范项目新型建筑工业化创新基地江苏省高等学校自然科学研究A项目资助项目江苏省高等学校自然科学研究A项目资助项目江苏高校青蓝工程优秀青年骨干教师项目2017年江苏省高校优秀科技创新团队盐工院自然科学重点课题2022年盐城市基础研究计划项目2023年国家外国专家项目2022年盐城工业职业技术学院校级课题

项目编号：

5197811419KJB56000622KJD560007Ygy1902YCBK202242G2023014042LYgy2202

出版年：

2024

DOI：

10.3969/j.issn.1002-3550.2024.01.029

混凝土

中国建筑东北设计研究院有限公司

混凝土

CSTPCD北大核心

影响因子：0.844

ISSN：1002-3550

年,卷(期)：2024.(1)

参考文献量42