Evaluation of the physical-mechanical properties of cement-lime based masonry mortars produced with mixed recycled aggregates

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2020-02-06 DOI:10.3989/mc.2020.02819

R. L. Ferreira, M. A. Anjos, E. F. Ledesma, J. Pereira, A. K. Nóbrega

引用次数: 15

Abstract

This study investigated the physical-mechanical effects of cement-lime mortars containing recycled aggregate of construction and demolition waste (CDW). The natural aggregate (NA) was replaced by volume at 25%, 50%, 75% and 100% by mixed recycled aggregate (MRA) obtained from the CDW crushing. Five types of mortars were prepared with a volumetric ratio of 1:1:6 (cement, lime and aggregate) and water/binder ratio based on the fixed consistency of 260 mm. The effects of MRA on fresh and hardened mortars’ properties were analyzed. The results were analyzed using a one-way ANOVA. MRA incorporation improved most of the physical-mechanical properties of mortars tested, except for hardened bulk density, water absorption and porosity. In the long-run, mechanical strengths significantly increased in all compositions, especially those with higher percentages of MRA. The results obtained showed that the use of MRA in masonry mortars is an alternative to reduce the generation of waste and consumption of natural resources.

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混合再生骨料生产水泥-石灰基砌体砂浆的物理力学性能评价

研究了含建筑垃圾再生骨料(CDW)的水泥石灰砂浆的物理力学效应。将天然骨料(NA)以25%、50%、75%和100%的体积替换为CDW破碎所得的混合再生骨料(MRA)。以固定稠度260 mm为基准，以体积比1:1:6(水泥、石灰、骨料)、水胶比配制5种砂浆。分析了MRA对新鲜砂浆和硬化砂浆性能的影响。结果采用单因素方差分析。MRA掺入改善了砂浆的大部分物理力学性能，除了硬化的体积密度、吸水率和孔隙率。从长期来看，所有组合物的机械强度都显著提高，尤其是那些含有较高MRA百分比的组合物。结果表明，在砌体砂浆中使用MRA是一种减少废物产生和自然资源消耗的替代方案。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.