Abstract
Environmental pollution due to CO2 emissions from the cement industry and the depletion of the natural resources of the aggregate used in the concrete industry call for the need to find alternatives to reduce these harmful effects. Some of these alternatives include the use of supplementary cementitious materials and the reuse of wastes from other industries as cement and aggregate replacement materials. Thus, this study was conducted to investigate the possibility of using autoclaved aerated (cellular) concrete blocks waste powder (CCP) that is locally produced as a partial substitute for cement or sand in mortar. Seven mixtures were cast. Three of them made by the substitution of the cement with CCP passed from 0.075 mm sieve (5%, 10 % and 15 % by weight), and other three mixtures comprised the replacement of natural sand with CCP of size 0.15−0.075 mm (5%, 10 % and 20 % by weight). A reference mixture (without replacement) was also performed for comparison purposes. The mechanical and water absorption properties were examined. Results indicated that among all tests examined, a sustainable mortar was produced by the substitution of the cement or sand with 10% CCP with an enhancement in the compressive strength without significantly affecting other properties of the mortar.
Highlights
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In order to reduce the depletion of natural resources as well as the environmental damages caused by the cement industry, alternatives to cement and aggregates are needed in concrete production
In order to reduce the environmental impact and enhance the sustainable development, this study was performed to investigate the potential use of concrete powder (CCP) resulted from the crushing and grinding of locally produced broken cellular concrete blocks as a partial replacement of cement or fine aggregate in cement mortar
Summary
Please cite this article as: Nasr MS, Ali IM, Hussein AM, Shubbar AA, Kareem QT, AbdulAmeer AT, Utilization of locally produced waste in the production of sustainable mortar, Case Studies in Construction Materials (2020), doi: https://doi.org/10.1016/j.cscm.2020.e00464 This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.
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