Orthogonal experimental study on unconfined compressive strength of a novel flow filling material

DOI

10.2991/978-94-6463-435-8_10How to use a DOI?

Keywords

Construction resources; Solidification improvement; Construction technique; Orthogonal experiment; Collapsible loess; red sandstone; Underground engineering

Abstract

A certain project in Lanzhou generated a large amount of abandoned collapsible loess and red sandstone during the excavation process. In order to achieve the dual goals of saving construction resources and protecting the environment, a certain proportion of cement, fly ash, lime, and NaOH are added to solidify and improve the abandoned soil, and it is prepared into a fluid filling material. Through orthogonal design, unconfined compressive strength tests are conducted on fluidic solidified soil with different ratios. The influencing factors and their significance are analyzed, the optimal proportions of each factor are obtained, and the regression equation of unconfined compressive strength is formulated. Additionally, the microstructure of the soil is studied. The results show that the cement content has the most significant impact on the unconfined compressive strength, followed by the fly ash content. The order of the influence of all factors on the unconfined compressive strength is as follows: cement content > fly ash content > mass ratio of collapsible loess to red sandstone > NaOH content > lime content. The amount of soil voids and cementitious materials determines the magnitude of compressive strength. The research results provide certain references for the preparation of fluidic solidified soil in collapsible loess and red sandstone areas.

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  - Yanpeng Zhu
AU  - Tao Huang
AU  - Anping Huang
AU  - Dong Chen
AU  - Linping Wu
PY  - 2024
DA  - 2024/06/13
TI  - Orthogonal experimental study on unconfined compressive strength of a novel flow filling material
BT  - Proceedings of the 2024 5th International Conference on Civil, Architecture and Disaster Prevention and Control (CADPC 2024)
PB  - Atlantis Press
SP  - 72
EP  - 86
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-435-8_10
DO  - 10.2991/978-94-6463-435-8_10
ID  - Zhu2024
ER  -