废轮胎橡胶混凝土界面过渡区特征试验研究

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (2): 573-578.

所属专题：资源综合利用

废轮胎橡胶混凝土界面过渡区特征试验研究

朱星曈¹, 耿欧^1,2, 朱思远¹

1.中国矿业大学力学与土木工程学院,徐州 221116;
2.中国矿业大学江苏省土木工程环境灾变与结构可靠性重点实验室,徐州 221116

收稿日期:2020-09-16 修回日期:2020-10-28 出版日期:2021-02-15 发布日期:2021-03-10
通讯作者: 耿欧,博士,教授。E-mail:ougeng@cumt.edu.cn
作者简介:朱星曈(1997—),女,硕士研究生。主要从事废轮胎橡胶混凝土方向的研究。E-mail:1483716871@qq.com
基金资助:
国家自然科学基金(51972337)

Characteristics of Interface Transition Zone of Waste Tire Rubber Concrete

ZHU Xingtong¹, GENG Ou^1,2, ZHU Siyuan¹

1. College of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, China;
2. Key Laboratory of Environmental Impact and Structural Safety in Engineering, China University of Mining and Technology, Xuzhou 221116, China

Received:2020-09-16 Revised:2020-10-28 Online:2021-02-15 Published:2021-03-10

摘要/Abstract

摘要： 采用SEM、EDS等测试技术,研究了1~3 mm废轮胎橡胶颗粒混凝土中橡胶与水泥石界面过渡区(ITZ)的微观形貌,水化产物分布以及ITZ宽度。结果表明:橡胶混凝土中橡胶与水泥石的界面粘结较普通混凝土中粗骨料与水泥石更为薄弱,ITZ的结构较为松散,孔隙率也较大;界面区水化产物中C-S-H凝胶含量小于普通混凝土,氢氧化钙晶体(CH)和钙矾石晶体(AFt)的含量则大于普通混凝土;1~3 mm橡胶颗粒混凝土ITZ宽度约为50 μm,而普通混凝土仅有40 μm,比普通混凝土更加不稳定。

关键词: 废轮胎橡胶混凝土, 界面过渡区, 水化产物, 元素分布

Abstract: SEM, EDS and other equipments were used to study the micro morphology, hydration product distribution and the width of interface transition zone (ITZ) in 1 mm to 3 mm waste tire rubber concrete. The results show that the interface bond between rubber and cement stone in rubber concrete is weaker than that between coarse aggregate and cement stone, that means rubber concrete has looser structure and higher porosity of ITZ than ordinary concrete.The content of hydrated calcium silicate (C-S-H) in hydrated products of ITZ of rubber concrete is less than that of ordinary concrete, while the content of calcium hydroxide (CH) and ettringite (AFt) crystals is higher than that of ordinary concrete. The width of ITZ of 1 mm to 3 mm waster tire rubber concrete is about 50 μm, while that of ordinary concrete is only 40 μm, so rubber concrete have more unstable interface transition zone.

Key words: waste tire rubber concrete, interfacial transition zone, hydration product, element distribution

中图分类号:

TQ171

朱星曈, 耿欧, 朱思远. 废轮胎橡胶混凝土界面过渡区特征试验研究[J]. 硅酸盐通报, 2021, 40(2): 573-578.

ZHU Xingtong, GENG Ou, ZHU Siyuan. Characteristics of Interface Transition Zone of Waste Tire Rubber Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(2): 573-578.

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废轮胎橡胶混凝土界面过渡区特征试验研究

Characteristics of Interface Transition Zone of Waste Tire Rubber Concrete

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