Effect of superabsorbent polymer on mechanical properties of cement stabilized base and its mechanism

Yongsheng Guan, Zhixiang Zhang, Xiaorui Zhang, Junqing Zhu, Wen Zhou, Qi Huang, Yuqing Zhang

Research output: Contribution to journalArticle

Abstract

Superabsorbent polymers (SAPs) are cross-linked polymers that can absorb and retain large amounts of water. In recent years, a growing interest was seen in applying SAPs in concrete to improve its performance due to its efficiency in mitigating shrinkage. This paper presents findings in a study on effect of SAPs on performance of cement-treated base (CTB), using the experience of internal curing of concrete. CTB specimens with and without SAPs were prepared and tested in the laboratory. Tests conducted include mechanical property testing, dry shrinkage testing, differential thermal analysis, mercury intrusion porosimetry and scanning electron microscope testing. It was found that 7-day and 28-day unconfined compressive strength of CTB specimens with SAPs was higher than regular CTB specimens. 28d compressive strength of CTB specimens with SAPs made by Static pressure method was 5.87 MPa, which is 27% higher than that of regular CTB specimens. Drying shrinkage of CTB specimens with SAPs was decreased by 52.5% comparing with regular CTB specimens. Through the microstructure analysis it was found that CTB specimens with SAPs could produce more hydration products, which is also the reason for the strength improvement.
Original languageEnglish
Pages (from-to)58-68
JournalTransportation Safety and Environment
Volume2
Issue number1
DOIs
Publication statusPublished - 30 Jun 2020

Bibliographical note

© The Author(s) 2020. Published by Oxford University Press on behalf of Central South University Press.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com

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    Guan, Y., Zhang, Z., Zhang, X., Zhu, J., Zhou, W., Huang, Q., & Zhang, Y. (2020). Effect of superabsorbent polymer on mechanical properties of cement stabilized base and its mechanism. Transportation Safety and Environment, 2(1), 58-68. https://doi.org/10.1093/tse/tdaa001