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 1.1 4区 工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY
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。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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
Materiales de Construccion
Materiales de Construccion 工程技术-材料科学:综合
CiteScore
3.20
自引率
9.50%
发文量
38
审稿时长
>12 weeks
期刊介绍: Materiales de Construcción is a quarterly, scientific Journal published in English, intended for researchers, plant technicians and other professionals engaged in the area of Construction, Materials Science and Technology. Scientific articles focus mainly on: - Physics and chemistry of the formation of cement and other binders. - Cement and concrete. Components (aggregate, admixtures, additions and similar). Behaviour and properties. - Durability and corrosion of other construction materials. - Restoration and conservation of the materials in heritage monuments. - Weathering and the deterioration of construction materials. - Use of industrial waste and by-products in construction. - Manufacture and properties of other construction materials, such as: gypsum/plaster, lime%2
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