Examining reproducible mix design, fresh and mechanical properties of ground granulated blast furnace slag-based alkali-activated concrete (GGBFS-based AAC): results of an interlaboratory study of RILEM TC 294-MPA

IF 3.9 3区 工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY
Patricia Kara De Maeijer, Guang Ye, Zhenming Li, Kruthi Kiran Ramagiri, Geert De Schutter, Yubo Sun, Frank Dehn, Arkamitra Kar, Juho Yliniemi, Yuwei Ma, Kazuo Ichimiya, Giulia Masi, Quoc Tri Phung, Wei Sha
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Abstract

This report presents a meticulous synthesis of collaborative interlaboratory research conducted within the purview of the RILEM Technical Committee 294-MPA, with two expert groups named RRT1 and RRT2, and encompassing ten participants from Belgium, China, Finland, India, Italy, Japan, the Netherlands, and the United Kingdom. The RRT1 expert group mainly focused on the ground granulated blast furnace slag-based alkali-activated concrete (GGBFS-based AAC) mix design and mechanical properties. In turn, the RRT2 expert group focused on the fresh properties of GGBFS-based AAC. The investigation, conducted between 2020 and 2024, aimed to establish globally reproducible mix design and mixing protocols for GGBFS-based AAC. Developed by the RRT1 and RRT2 expert groups, these protocols have emerged through iterative experiments followed by a comprehensive interlaboratory study. The outcomes highlight the reliable production of GGBFS-based AAC across participants, with minor deviations in fresh and mechanical properties that are largely consistent with those observed in Portland cement concrete (PCC). The primary objective of the developed GGBFS-based AAC mix design was to achieve a defined consistence class S4, while targeting a compressive strength threshold of approximately 50 MPa at 28 days. This objective was effectively realized, with the average compressive strength values reaching 56 MPa at 28 days and 64 MPa at 720 days. While the average splitting tensile strength stabilized at 3.2 MPa over the 720 day period. These findings underscore the growing importance of AAC within the construction sector, particularly due to its reproducible and reliable experimental results, as the industry increasingly shifts toward more sustainable alternatives to traditional cement-based materials.

检验高炉渣基碱活化混凝土(GGBFS-based AAC)的可重复配合比设计、新鲜度和力学性能:RILEM TC 294-MPA实验室间研究的结果
本报告对RILEM技术委员会294-MPA范围内开展的实验室间合作研究进行了细致的综合,由RRT1和RRT2两个专家组组成,包括来自比利时、中国、芬兰、印度、意大利、日本、荷兰和英国的10名参与者。RRT1专家组主要研究了地面粒状高炉渣基碱活化混凝土(GGBFS-based AAC)配合比设计和力学性能。反过来,RRT2专家组关注了基于ggbf的AAC的新特性。该研究于2020年至2024年间进行,旨在为基于ggbf的AAC建立全球可重复的混合设计和混合协议。这些协议由RRT1和RRT2专家组制定,经过反复实验和综合实验室间研究得出。结果强调了参与者之间基于ggbf的AAC的可靠生产,其新鲜和机械性能的微小差异与波特兰水泥混凝土(PCC)中观察到的基本一致。开发的基于ggbfs的AAC混合料设计的主要目标是达到定义的S4级稠度,同时目标是在28天内达到约50 MPa的抗压强度阈值。这一目标得到了有效实现,28天的平均抗压强度为56 MPa, 720天的平均抗压强度为64 MPa。而在720 d期间,平均劈裂抗拉强度稳定在3.2 MPa。这些发现强调了AAC在建筑行业日益增长的重要性,特别是由于其可重复和可靠的实验结果,随着行业越来越多地转向传统水泥基材料的更可持续的替代品。
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
Materials and Structures
Materials and Structures 工程技术-材料科学:综合
CiteScore
6.40
自引率
7.90%
发文量
222
审稿时长
5.9 months
期刊介绍: Materials and Structures, the flagship publication of the International Union of Laboratories and Experts in Construction Materials, Systems and Structures (RILEM), provides a unique international and interdisciplinary forum for new research findings on the performance of construction materials. A leader in cutting-edge research, the journal is dedicated to the publication of high quality papers examining the fundamental properties of building materials, their characterization and processing techniques, modeling, standardization of test methods, and the application of research results in building and civil engineering. Materials and Structures also publishes comprehensive reports prepared by the RILEM’s technical committees.
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