再生混凝土骨料对透水混凝土强度和耐久性的影响

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

Magazine of Concrete Research Pub Date : 2023-10-05 DOI:10.1680/jmacr.23.00089

Mudasir Nazeer, Kanish Kapoor, S.P. Singh

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引用次数: 0

摘要

本研究旨在评估用粉煤灰(FA)和再生混凝土骨料(RCA)代替波特兰水泥(PC)和天然骨料(NA)制备透水混凝土的性能。RCA替代NA的比例分别为0%、50%和100%，FA替代的比例固定为10%。透水混凝土的各种新鲜(和易性和一致性)、机械(抗压强度、劈裂拉伸和剪切强度)、耐久性(耐磨性、冻融性、抗弯性和耐酸性)和微观结构(SEM和EDS)性能在不同的养护期进行了评估。研究结果表明，在不同水平上加入RCA和部分替代FA被证明是用于结构和路面施工目的的透水混凝土的理想选择。此外，掺入10% FA和更高水平的RCA对改善透水混凝土的微观结构性能非常有益。在添加10% FA和100% RCA的混合物中，观察到C-S-H和C-H与致密分层的均匀显微照片。

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Impact of recycled concrete aggregates on the strength and durability properties of pervious concrete

The present investigation has been designed to assess the performance of pervious concrete prepared with Fly Ash (FA) and Recycled Concrete Aggregates (RCA) in place of Portland Cement (PC) and Natural Aggregates (NA). The percentage of NA replacement with RCA was in the proportion of 0%, 50%, and 100%, while the percentage of FA substitution was fixed at 10%. Various fresh (workability and consistency), mechanical (compressive strength, split tensile, and shear strength), durability (abrasion resistance, freeze thaw, flexure, and acid resistance), and microstructural (SEM and EDS) properties of pervious concrete have been evaluated at different curing periods. The findings reveal that the incorporation of RCA at different levels and partial substitution of FA proves to be desirable for the use of pervious concrete for structural and pavement construction purposes. Furthermore, incorporation of 10% FA in addition to higher levels of RCA proves significantly beneficial in refining the microstructural behaviour of pervious concrete. A homogenous micrograph with dense and layered C-S-H and C-H with was observed for mix made with 10% FA and 100% RCA.

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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.