Influence of mixture design parameters on the static and dynamic compressive properties of slag-based geopolymer concrete

Ou, Z., Feng, R., Mao, T. and Li, N. (2022) Influence of mixture design parameters on the static and dynamic compressive properties of slag-based geopolymer concrete. Journal of Building Engineering, 53, 104564. (doi: 10.1016/j.jobe.2022.104564)

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Abstract

This study investigated the influences of water-to-binder mass ratio (0.44, 0.47, and 0.50), and waterglass (8%, 12% and 16%) and fly ash (0%, 25% and 50%) contents on the slump, cubic compressive strength, and static and dynamic compressive behaviors of slag-based geopolymer concrete (GC). Static compressive tests were carried out by using an electro-hydraulic servo-controlled compressive test system, and dynamic ones were performed by using a split Hopkinson pressure bar (SHPB) apparatus. The specimens with a wide range of the compressive strength (from 50 MPa to 80 MPa) were prepared. The results show that the workability of fresh slag-based GC increased with increasing water-to-binder ratio, and waterglass and fly ash contents. The cubic compressive strength increased with the decreases of water-to-binder ratio and fly ash content, and the increase of the waterglass content. Increasing waterglass content contributed to the improvement of the static compressive behavior of slag-based GC, such as elastic modulus and peak stress, while it led to the rise of the brittleness. Slag-based GC with different water-to-binder mass ratios, and waterglass and fly ash contents showed a strong strain-rate dependency. However, the inclusion of 50% fly ash induced a sharp increase of the dynamic compressive strength and dynamic increase factor (DIF) at a high strain rate. Moreover, both the two formulations for fitting static compressive stress-strain curve and DIF with higher accuracy were proposed in this study.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Li, Dr Ning
Authors: Ou, Z., Feng, R., Mao, T., and Li, N.
College/School:College of Science and Engineering > School of Engineering > Infrastructure and Environment
Journal Name:Journal of Building Engineering
Publisher:Elsevier
ISSN:2352-7102
ISSN (Online):2352-7102
Published Online:26 April 2022
Copyright Holders:Copyright © 2022 The Authors
First Published:First published in Journal of Building Engineering 53: 104564
Publisher Policy:Reproduced under a Creative Commons License

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