Issue |
E3S Web Conf.
Volume 276, 2021
2021 5th International Conference on Water Conservancy, Hydropower and Building Engineering (WCHBE 2021)
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Article Number | 02018 | |
Number of page(s) | 5 | |
Section | Research on Building Structure and Construction Technology | |
DOI | https://doi.org/10.1051/e3sconf/202127602018 | |
Published online | 23 June 2021 |
Experimental Study on the Pavement Performance of Cement-Improved Silty Fine Sand
1 Lan Zhou Jiaotong University, Lan Zhou, Gansu Province, China
2 Key Laborayory of road, bridge and underground engineering of Gansu Province, Lan Zhou, Gansu Province, China
3 China Railway First Survey and Design Institute, Lan Zhou, Gansu Province, China
4 Gansu Jiu E Railway Co., Ltd, Jiu Quan, Gansu Province, China
* Corresponding author: 1289578350@qq.com
In view of the fact that there is in shortage of superior roadbed fillers in gobi and desert areas and based on the economical and environment-friendly concept, the cement-improved silty fine sand will be used as the roadbed filler of a railway construction project, which has the engineering characteristics of difficult compaction of local silty fine sands and loose structure, within the territory of Jiuquan, Gansu Province.The test indicated that the actual silty fine sands presented relatively concentrated particle sizes in this project, the particle composition was uniform and difficult to compact. The 7d saturated unconfined compressive strength of the cement-improved silty fine sand filler was correlated with the cement content, curing age and compaction coefficient, and also showed a good linear fitting relation with the cement content. As the delay time of sample molding was lengthened, the 7d saturated unconfined compressive strength of the samples was gradually reduced, and the strength retention rate had a favorable fitting relation with the delay time of sample molding. The compaction coefficient was detected using the sand-cone method in the field compaction test, and on this basis, the “ex post detection” method was proposed to detect the compaction coefficient of this special type of fillers.
© The Authors, published by EDP Sciences, 2021
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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