Experimental study on the compressive strength of unsaturated loess with different contents of grout material and water glass

DOI

10.2991/978-94-6463-372-6_3How to use a DOI?

Keywords

Loess; Grout material; Water glass; Compressive strength

Abstract

Unsaturated loess, classified as a distinctive soil type, possesses a compressible large-pore structure, and exhibits a rapid reduction in strength upon exposure to water. This characteristic imposes significant constraints on engineering constructions in loess regions. Introducing grouting materials such as mixing grout and sodium silicate into loess is deemed an effective measure to ameliorate and enhance its engineering properties. This study conducts experiments to investigate the compressive strength of unsaturated loess with varying ratios of grouting material to sodium silicate. Standard-sized specimens are prepared for different test groups (grouting material: 15% - 33%; sodium silicate dry content: 3% - 5%; initial moisture content: 15% - 25%), and their unconfined compressive strength is measured after a curing period of 28 days. The experimental results indicate that the compressive strength of unsaturated loess monotonically increases with the escalating dosage of sodium silicate, rises with higher initial moisture content, and decreases with an increasing amount of grouting material within the specified parameter range. The weight of the impact of the three factors on compressive strength within the experimental parameter range can be ranked as follows: sodium silicate > grouting material > initial moisture content. Through theoretical analysis from both physical and chemical perspectives, this study elucidates the mechanisms by which sodium silicate, grouting material, and soil moisture influence the strength of unsaturated loess. The research findings offer valuable insights for optimizing the performance-based design of unsaturated loess.

Copyright

© 2024 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Zaikun Zhao
AU  - Tiehang Wang
AU  - Liang Zhang
AU  - Jiabin Ruan
AU  - Siqin Lv
AU  - Yu Xing
AU  - Hongbo Yin
PY  - 2024
DA  - 2024/02/12
TI  - Experimental study on the compressive strength of unsaturated loess with different contents of grout material and water glass
BT  - Proceedings of the 2023 5th International Conference on Civil Architecture and Urban Engineering (ICCAUE 2023)
PB  - Atlantis Press
SP  - 13
EP  - 21
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-372-6_3
DO  - 10.2991/978-94-6463-372-6_3
ID  - Zhao2024
ER  -