使用钢渣粗集料增强混凝土的力学性能和孔隙率

Enhancement of Mechanical Properties and Porosity of Concrete Using Steel Slag Coarse Aggregate.

作者信息

Miah Md Jihad, Patoary Md Munir Hossain, Paul Suvash Chandra, Babafemi Adewumi John, Panda Biranchi

机构信息

Department of Civil Engineering, University of Asia Pacific, Dhaka 1205, Bangladesh.

Department of Civil Engineering, International University of Business Agriculture and Technology, Dhaka 1230, Bangladesh.

出版信息

Materials (Basel). 2020 Jun 26;13(12):2865. doi: 10.3390/ma13122865.

DOI:10.3390/ma13122865

PMID:32604757

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7344919/

Abstract

This paper investigates the possibility of utilizing steel slags produced in the steelmaking industry as an alternative to burnt clay brick aggregate (BA) in concrete. Within this context, physical, mechanical (i.e., compressive and splitting tensile strength), length change, and durability (porosity) tests were conducted on concrete made with nine different percentage replacements (0%, 10%, 20%, 30%, 40%, 50%, 60%, 80%, and 100% by volume of BA) of BA by induction of furnace steel slag aggregate (SSA). In addition, the chemical composition of aggregate through X-ray fluorescence (XRF) analysis and microstructural analysis through scanning electron microscopy (SEM) of aggregates and concrete were performed. The experimental results show that the physical and mechanical properties of concrete made with SSA were significantly higher than that of concrete made with BA. The compressive and tensile strength increased by 73% when SSA fully replaced BA. The expansion of concrete made with SSA was a bit higher than the concrete made with BA. Furthermore, a significant lower porosity was observed for concrete made with SSA than BA, which decreased by 40% for 100% SSA concrete than 100% BA concrete. The relation between compressive and tensile strength with the porosity of concrete mixes are in agreement with the relationships presented in the literature. This study demonstrates that SSA can be used as a full replacement of BA, which is economical, conserves the natural aggregate, and is sustainable building material since burning brick produces a lot of CO.

摘要

本文研究了将钢铁行业生产的钢渣用作混凝土中烧粘土砖骨料（BA）替代品的可能性。在此背景下，对用感应炉钢渣骨料（SSA）替代九种不同比例（0%、10%、20%、30%、40%、50%、60%、80%和100%（体积）的BA）的BA制成的混凝土进行了物理、力学（即抗压和劈裂抗拉强度）、长度变化和耐久性（孔隙率）测试。此外，通过X射线荧光（XRF）分析对骨料的化学成分进行了分析，并通过扫描电子显微镜（SEM）对骨料和混凝土进行了微观结构分析。实验结果表明，用SSA制成的混凝土的物理和力学性能明显高于用BA制成的混凝土。当SSA完全替代BA时，抗压强度和抗拉强度提高了73%。用SSA制成的混凝土的膨胀率比用BA制成的混凝土略高。此外，观察到用SSA制成的混凝土的孔隙率明显低于用BA制成的混凝土，100%SSA混凝土的孔隙率比100%BA混凝土降低了40%。混凝土混合料的抗压强度和抗拉强度与孔隙率之间的关系与文献中提出的关系一致。本研究表明，SSA可以完全替代BA，这是一种经济、节约天然骨料且可持续的建筑材料，因为烧制砖块会产生大量二氧化碳。