Developing geopolymer concrete using fine recycled concrete powder and recycled aggregates

IF 1.8 4区工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY

Magazine of Concrete Research Pub Date : 2024-04-14 DOI:10.1680/jmacr.23.00360

Paramveer Singh, K. Kapoor

引用次数: 0

Abstract

The paper investigates the efficacy of Fine Recycled Concrete Powder (FRCP) and Recycled Aggregates (RA) as partial replacements of Fly Ash (FA) and Natural Aggregates (NA) respectively to develop sustainable Geopolymer Concrete (GC). The strength of GC was measured in terms of Compression Strength. To evaluate durability performance, such as Capillary Suction Test (CST), Initial Surface of Absorption (ISA) test and Acid Attack were performed at ambient curing. The compression strength of GC made with 50% RA (both coarse and fine) along with FRCP is comparable to that of GC made with NA. Similarly, the inclusion of FRCP in GC mixes results in a pore-blocking effect to restrict the water ingress in GC through Capillary Suction and Surface Absorption even with 50% Coarse and 25% Fine RA. The study has demonstrated that sustainable GC can be developed using appropriate doses of FRCP and RA.

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利用混凝土细粉和再生骨料开发土工聚合物混凝土

本文研究了细再生混凝土粉（FRCP）和再生骨料（RA）分别作为粉煤灰（FA）和天然骨料（NA）的部分替代品对开发可持续土工聚合物混凝土（GC）的功效。土工聚合物混凝土的强度以压缩强度来衡量。为了评估耐久性能，在常温固化条件下进行了毛细管吸力试验（CST）、初始表面吸力试验（ISA）和酸侵蚀试验。使用 50% RA（包括粗粒和细粒）和 FRCP 制成的 GC 的压缩强度与使用 NA 制成的 GC 相当。同样，在 GC 混合料中加入 FRCP 会产生孔隙阻塞效应，通过毛细管吸力和表面吸力限制 GC 中的水分渗入，即使粗 RA 含量为 50%，细 RA 含量为 25%。该研究表明，使用适当剂量的 FRCP 和 RA 可以开发出可持续的 GC。

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

Magazine of Concrete Research 工程技术-材料科学：综合

CiteScore

4.60

自引率

11.10%

发文量

102

审稿时长

5 months

期刊介绍： For concrete and other cementitious derivatives to be developed further, we need to understand the use of alternative hydraulically active materials used in combination with plain Portland Cement, sustainability and durability issues. Both fundamental and best practice issues need to be addressed. Magazine of Concrete Research covers every aspect of concrete manufacture and behaviour from performance and evaluation of constituent materials to mix design, testing, durability, structural analysis and composite construction.