Preparation Method and Physicomechanical Properties of EPS Lightweight Compaction-Filling Thermal Insulation Grouting Material

DOI

10.2991/978-94-6239-740-8_8How to use a DOI?

Keywords

Roadbed repair; Grouting material; Thermal insulation; Negative temperature curing

Abstract

Challenges are faced in the repair of local deformation diseases of roadbeds in permafrost regions. Grouting roadbed repair materials with both permafrost engineering adaptability and cost-effectiveness need to be developed urgently. EPS lightweight compaction-filling thermal insulation grouting material was proposed. Based on the three-factor and three-level orthogonal test and the method of controlled variables, physicomechanical indicators were measured. These indicators included negative temperature unconfined compressive strength, flowability, initial setting time, thermal conductivity, mass and strength loss rates of freeze-thaw cycles, and heat of hydration. The influence of each factor on the indexes was analyzed systematically. Material mix proportions suitable for filling and compaction grouting in permafrost engineering were optimized. Distribution images of aggregates and matrix were established by industrial CT. Results show that the optimal mix proportion of the material is as follows: the mass fraction of perlite is 50%, the water-cement ratio is 0.5, the content of polypropylene fiber is 0.1%, the content of fly ash is 20%, and the Superplasticizer dosage is 0.2%. A positive effect on aggregate anti-floating and anti-segregation is possessed by EPS modification and mix proportion design. The heat transfer mode of the grouting material tends to the series model, indicating that the skeleton conduction is effectively blocked by light aggregates, and ideal thermal insulation performance is obtained. Core parameters are provided by the research results for the mix proportion of EPS lightweight compaction-filling thermal insulation grouting materials. Broad application prospects are possessed in compaction and filling grouting engineering in permafrost regions.

Copyright

© 2026 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  - Letian Zhang
AU  - Huan He
AU  - Dingwen Zhang
AU  - Songyu Liu
PY  - 2026
DA  - 2026/08/14
TI  - Preparation Method and Physicomechanical Properties of EPS Lightweight Compaction-Filling Thermal Insulation Grouting Material
BT  - Proceedings of the 2026 9th International Symposium on Traffic Transportation and Civil Architecture (ISTTCA 2026)
PB  - Atlantis Press
SP  - 78
EP  - 95
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6239-740-8_8
DO  - 10.2991/978-94-6239-740-8_8
ID  - Zhang2026
ER  -