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

IF 1.1 4区工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY

Materiales de Construccion 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.

查看原文本刊更多论文

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。

求助全文

约1分钟内获得全文求助全文

来源期刊

Materiales de Construccion 工程技术-材料科学：综合

CiteScore

3.20

自引率

9.50%

发文量

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