不同养护条件下粗细集料配比对碾压混凝土路面干缩的影响

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2021-05-05 DOI:10.3989/MC.2021.03520

M. Abbasi, P. Shafigh, M. R. Baharum

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引用次数: 2

摘要

干燥收缩是一种不可避免的现象，它会导致硬化混凝土出现裂缝，并最终导致显著的体积变化。研究了碾压混凝土路面在两种不同养护条件下的干缩应变行为。RCCP的变量是在12%和15%的两种水泥剂量下，粗骨料与细骨料（C/F）的比例分别为0.7、1、1.2和1.5。还对新鲜的RCCP以及硬化的RCCP的压缩、劈拉和弯曲拉伸强度进行了Vebe测试。试验结果表明，当水泥含量从12%增加到15%时，在固化和非固化条件下，干缩应变都会增加。通常，当C/F比低于1.0时，干燥收缩应变显著增加。强烈建议在RCCP的混合物中使用在1.0至1.2范围内的C/F骨料比。

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The effect of coarse to fine aggregate ratio on drying shrinkage of roller compacted concrete pavement in different curing conditions

Drying shrinkage is an inevitable phenomenon that leads to cracks and eventually remarkable volume changes in hardened concrete. In this study, the drying shrinkage strain behavior of roller compacted concrete pavements (RCCPs) in two different curing conditions was investigated. The variables of RCCPs were coarse to fine aggregate (C/F) ratios of 0.7, 1, 1.2 and 1.5 in two cement dosages of 12% and 15%. Vebe tests of the fresh RCCP as well as the compressive, splitting tensile and flexural tensile strengths of the hardened RCCPs were also performed. The test results indicate that by increasing cement content from 12% to 15%, the drying shrinkage strain increased in both cured and non-cured conditions. Generally, the drying shrinkage strain was significantly increased when the C/F ratio was lower than 1.0. It is highly recommended that C/F aggregate ratio is used in the range of 1.0 to 1.2 in the mixture of RCCP.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.