橡胶集料混凝土与普通混凝土的黏结性能与机理研究  

Experimental Study on the Property and Mechanism of the Bonding between Rubberized Concrete and Normal Concrete

作　　者：刘春丽 刘信勇 LIU Chunli;LIU Xinyong(Henan Water&Power Engineering Consulting Co.,Ltd.,Zhengzhou 450016,China;Yellow River Engineering Consulting Co.,Ltd.,Zhengzhou 450003,China)

机构地区：[1]河南省水利勘测设计研究有限公司,河南郑州450016 [2]黄河勘测规划设计研究院有限公司,河南郑州450003

出　　处：《河南科技》2022年第14期55-60,共6页Henan Science and Technology

基　　金：国家自然科学基金项目(U1704243)。

摘　　要：本研究采用平均2 mm和4 mm两种粒径的橡胶颗粒,经改性剂处理后,等体积取代C30强度等级普通混凝土中的部分砂集料,称之为橡胶集料混凝土。通过橡胶集料混凝土(新浇筑混凝土)与普通混凝土(长龄期混凝土)黏结抗拉强度试验,研究橡胶颗粒粒径、掺量和改性方法对黏结抗拉强度的影响规律。试验结果表明,随着橡胶颗粒掺量的增大,橡胶集料混凝土—普通混凝土黏结抗拉强度呈先增后降变化,且掺加平均4 mm粒径橡胶颗粒的黏结抗拉强度大于掺加平均2 mm粒径橡胶颗粒的黏结抗拉强度。橡胶颗粒经改性剂处理,或在黏结面上涂刷水泥浆、界面剂均可提高黏结抗拉强度。无重复双因素方差分析结果显示,橡胶掺量和界面剂类型对黏结抗拉强度影响显著,橡胶颗粒粒径和改性剂对黏结抗拉强度影响不显著。In this study, two kinds of rubber particles with average diameter of 2 mm and 4 mm are used to replace part of sand aggregate in C30 strength grade common concrete by equal volume after treatment with modifier, which is called rubber aggregate concrete. The effects of rubber particle size, dosage and modification method on the bonding tensile strength of rubber aggregate concrete(newly poured concrete) and ordinary concrete(long-age concrete) were studied by testing the bonding tensile strength of rubber aggregate concrete. The test results show that the bond tensile strength of rubber aggregate concrete-ordinary concrete increases first and then decreases with the increase of the content of rubber particles, and the bond tensile strength of 4 mm rubber particles is greater than that of 2 mm rubber particles. The adhesive tensile strength can be improved by modifying rubber particles or brushing cement slurry and interface agent on the bonding surface. The results of two-factor anova showed that the rubber content and the type of interfacial agent had significant effects on the bond tensile strength, while the rubber particle size and modifier had no significant effects on the bond tensile strength.

关 键 词：橡胶集料混凝土 橡胶颗粒 改性剂 界面剂 

分 类 号：TU528[建筑科学—建筑技术科学]