Marble waste and recycled concrete aggregates in self compacting concrete (SSC): an evaluation of fresh and hardened properties

IF 1.6 Q3 ENGINEERING, CIVIL
O. Ofuyatan, Kayode-Thomas Enoch, Oluwafuminiyi Ogundeji, David O. Omole
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引用次数: 3

Abstract

ABSTRACT Abundant waste is being generated in the demolition or renovation in the construction industry. Improper disposal of this waste creates environmental concern as they form huge landfills without proper use. This study examined the fresh, hardened, durability, and microstructural analysis of self-compacting concrete made with recycled aggregates (RA) and marble waste as a 10–30% granite substitute. Slump flow test, T50cm test, V-funnel test, and L-box test were conducted on the fresh concrete. Compressive strength, split tensile strength, flexural strength, microstructural properties, and carbonation of the hardened concrete were determined. The physical tests revealed that though the recycled aggregates and marble waste do not have properties as good as the natural coarse aggregates, recycled aggregates were observed to exhibit a better strength than marble waste. SCC with marble waste had better fresh state properties than those with recycled aggregates. SCC with recycled aggregates had better-hardened state properties than those with marble waste. It can be inferred from the microstructural analysis that the utilisation of partial granite replacement improved the interaction between the concrete constituents. However, the sample with recycled aggregate was still better than that with marble waste in this regard.
自密实混凝土(SSC)中的大理石废料和再生混凝土骨料:新鲜和硬化性能的评估
摘要建筑业在拆迁或改造过程中产生了大量的垃圾。这些废物的不当处理造成了环境问题,因为它们在没有得到适当利用的情况下形成了巨大的垃圾填埋场。本研究考察了用再生骨料(RA)和大理石废料作为10-30%花岗岩替代品制成的自密实混凝土的新鲜度、硬化度、耐久性和微观结构分析。对新拌混凝土进行了坍落度流动试验、T50cm试验、V型漏斗试验和L型箱试验。测定了硬化混凝土的抗压强度、劈拉强度、抗弯强度、微观结构性能和碳化性能。物理测试表明,尽管再生骨料和大理石废料的性能不如天然粗骨料,但观察到再生骨料比大理石废料表现出更好的强度。大理石废料SCC比再生骨料SCC具有更好的新鲜状态性能。使用再生骨料的SCC比使用大理石废料的SCC具有更好的硬化状态性能。从微观结构分析可以推断,部分花岗岩置换的使用改善了混凝土成分之间的相互作用。然而,在这方面,使用再生骨料的样品仍然优于使用大理石废料的样品。
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
CiteScore
3.90
自引率
7.70%
发文量
31
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