期刊
JOURNAL OF SUSTAINABLE CEMENT-BASED MATERIALS
卷 4, 期 2, 页码 116-128出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/21650373.2014.979265
关键词
alkali-activated concrete; blast furnace slag; fly ash; microstructure; durability; commercialization
类别
资金
- Zeobond Research Pty Ltd
- Australian Research Council [LP0991550]
- Ministry of Higher Education of Malaysia
Alkali-activated concrete (AAC) has been commercialized as a low-CO2 construction material, but its adoption still faces several challenges, including standardization, lack of a dedicated supply chain, limited service track record, and the question of whether laboratory durability testing can predict service life. This paper outlines how using different precursors leads to the formation of different AAC phase assemblages, and how AAC can be recognized in standards using a performance-based approach independent of binder chemistry. Microstructural assessment of pastes, strength development, water permeability, and chloride migration of two AACs (100% slag and 1:1 slag:fly ash) are presented, and compared to Portland cement concrete. Manipulation of binder chemistry leads to differences in the properties of the AACs; however, both AACs assessed exhibited technical benefits in a performance-based comparison. AACs can meet the requirements of the equivalent performance concept, independent of the binder chemistry, supporting their scale-up, regulatory acceptance, and wider adoption.
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