Development of sustainable high-performance desert sand concrete: Engineering and environmental impacts of compression casting

IF 11.2 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Resources Conservation and Recycling Pub Date : 2024-11-12 DOI:10.1016/j.resconrec.2024.108002

Syed Minhaj Saleem Kazmi , Muhammad Junaid Munir , Yu-Fei Wu

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Abstract

River sand is essential for concrete but its production depletes 50 billion tons of resources annually causing scarcity and environmental issues. Desert sand (DS) covering 6 million square kilometers could help address this scarcity but has inferior properties. This study develops high-strength desert sand concrete (DSC) using 100 % DS through compression casting. Nine concrete mixes were prepared with varying DS replacement levels (0, 50, 100 %) and design strengths (30, 50, 70 MPa). Compression casting improved DSC's compressive and split tensile strength by up to 93 % and 54 % respectively compared to traditional concrete. It also reduced water absorption and voids by up to 41 % and 34 % and enhanced chloride and carbonation resistance by up to 64 % and 100 %. XRD, DSC-TG, and SEM analyses also confirm these results. Compression casting of DSC cut costs, CO₂ emissions, and energy consumption by up to 57 %, 43 %, and 42 % respectively. This innovative DSC offers superior engineering, environmental, and economic benefits as a sustainable alternative to traditional concrete.

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开发可持续的高性能沙漠砂混凝土：压缩浇注的工程和环境影响

河砂是混凝土的必需品，但其生产每年消耗 500 亿吨资源，造成资源匮乏和环境问题。面积达 600 万平方公里的沙漠砂（DS）可帮助解决这一稀缺问题，但其性能较差。本研究利用 100% 的沙漠砂通过压缩浇注法开发了高强度沙漠砂混凝土（DSC）。研究人员配制了九种混凝土混合物，其DS替代水平（0、50、100%）和设计强度（30、50、70兆帕）各不相同。与传统混凝土相比，压缩浇注法使 DSC 的抗压强度和劈裂拉伸强度分别提高了 93% 和 54%。此外，它还将吸水率和空隙率分别降低了 41% 和 34%，并将抗氯化物和抗碳化性能分别提高了 64% 和 100%。XRD、DSC-TG 和 SEM 分析也证实了这些结果。DSC 压缩铸造的成本、二氧化碳排放量和能耗分别降低了 57%、43% 和 42%。作为传统混凝土的可持续替代品，这种创新的 DSC 具有卓越的工程、环境和经济效益。

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来源期刊

Resources Conservation and Recycling 环境科学-工程：环境

CiteScore

22.90

自引率

6.10%

发文量

625

审稿时长

23 days

期刊介绍： The journal Resources, Conservation & Recycling welcomes contributions from research, which consider sustainable management and conservation of resources. The journal prioritizes understanding the transformation processes crucial for transitioning toward more sustainable production and consumption systems. It highlights technological, economic, institutional, and policy aspects related to specific resource management practices such as conservation, recycling, and resource substitution, as well as broader strategies like improving resource productivity and restructuring production and consumption patterns. Contributions may address regional, national, or international scales and can range from individual resources or technologies to entire sectors or systems. Authors are encouraged to explore scientific and methodological issues alongside practical, environmental, and economic implications. However, manuscripts focusing solely on laboratory experiments without discussing their broader implications will not be considered for publication in the journal.