Shrinkage of blended cement concrete with fly ash or limestone calcined clay
Author(s): |
Sumaiya Afroz
Yingda Zhang Quang Dieu Nguyen Taehwan Kim Arnaud Castel |
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Medium: | journal article |
Language(s): | English |
Published in: | Materials and Structures, 30 January 2023, n. 1, v. 56 |
DOI: | 10.1617/s11527-023-02099-8 |
Abstract: |
This study investigates the shrinkage of two sustainable aluminosilicate blends with fly ash or limestone-calcined clay (LC3). Paste and concrete were prepared using these SCMs for the highest possible replacement of binder without compromising the strength. The chemical and autogenous shrinkage were assessed for paste samples and further investigation were conducted on hydration by thermogravimetric analysis (TGA) and Fourier transform infrared spectroscopy (FTIR). Opting for an engineering approach, comparison among different segments of shrinkage i.e., autogenous, drying and total shrinkage of concrete having a specific compressive strength were considered. The initial investigation on paste samples highlighted the dissimilarities in shrinkage and hydration of fly ash and calcined clay. LC3 hydrated faster compared to fly ash leading to greater autogenous shrinkage. The high autogenous shrinkage in the LC3 blend was compensated by a low drying shrinkage for a specific compressive strength. Considering the replacement level of cement, shrinkage, and ecological impact, LC3 proved to be a more sustainable and eco-friendly concrete compared to fly ash. |
Copyright: | © The Author(s) 2023 |
License: | This creative work has been published under the Creative Commons Attribution 4.0 International (CC-BY 4.0) license which allows copying, and redistribution as well as adaptation of the original work provided appropriate credit is given to the original author and the conditions of the license are met. |
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data sheet - Reference-ID
10708697 - Published on:
21/03/2023 - Last updated on:
10/05/2023