Effects of slag substitution on physical and mechanical properties of fly ash-based alkali activated binders (AABs)
| Autor: | Ali Rafeet, Marios Soutsos, Raffaele Vinai, Wei Sha |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
alkali activated cement fungi microstructure 0211 other engineering and technologies technology industry and agriculture 02 engineering and technology Building and Construction 021001 nanoscience & nanotechnology Microstructure Compressive strength fly ash Chemical engineering mixture proportioning Ground granulated blast-furnace slag Fly ash 021105 building & construction Alkali activated General Materials Science Mortar Fourier transform infrared spectroscopy granulated blast-furnace slag 0210 nano-technology Curing (chemistry) |
| Zdroj: | Rafeet, A M, Vinai, R, Soutsos, M & Sha, W 2019, ' Effects of slag substitution on physical and mechanical properties of fly ash-based alkali activated binders (AABs) ', Cement and Concrete Research, vol. 122, pp. 118-135 . https://doi.org/10.1016/j.cemconres.2019.05.003 |
| DOI: | 10.1016/j.cemconres.2019.05.003 |
| Popis: | Neat fly ash-based alkali activated binders require high activator dosages and high temperature curing in order to develop satisfactory mechanical properties. Blending ground granulated blast furnace slag (GGBS) with fly ash can give medium to high strengths without the need for high temperature oven curing. An extensive investigation was carried out for understanding the effects of GGBS substitution of fly ash in mortar. GGBS substitution in the mix has an impact on mix proportions, fresh and hardened properties, and microstructure of reaction products. The strength of fly ash/GGBS blends cured at room temperature increased with the increase of GGBS content, whilst setting time showed an opposite trend. Fly ash/GGBS blends required lower activator dosages for obtaining high compressive strength, which has cost and environmental benefits. XRD, FTIR, TGA, and SEM/EDX results confirmed the presence of C-A-S-H gel as a reaction product with as low as 20% GGBS content. |
| Databáze: | OpenAIRE |
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