Experiment on Semi-Flexible Pavement Materials with Gold Tailings Cemented Mortar

DOI

10.2991/978-94-6463-658-1_62How to use a DOI?

Keywords

semi-flexible pavement; gold tailings; cemented mortars; interconnected porosity rate; perfusion ration

Abstract

Gold tailings (GT) are fine particles expelled after extraction of target metals and minerals from gold ore. The particle sizes mainly concentrate between 0.045mm and 0.15mm, and with richer metallic components and fewer sulfides. GT are largely underused in building materials. Considering engineering properties of grouted semi-flexible pavements (SFP) and the special characteristics of GT, such as its fine particle size and higher content of metals and sulfides, an experiment on SFP grouted with gold tailings cemented mortar (GTCM) is conducted. In cement mortar, the whole natural sand is substituted by GT. Referring to local standard DB11/T 1817, experiment on technical parameters of GTCM, base asphalt mixture, and SFP material grouted with GTCM are carried out. The results show that: when the mass of GT accounts for 28% of the cement mortar, the water-to-solid ratio is 0.69, and the dosage of polycarboxylate powder super plasticizer is 0.05%, GTCM with a flowability value of 9s to 11s, a 7d compressive strength of 15.8MPa, a 7d flexural strength of 3.8MPa, and no detected drying shrinkage can be prepared. The base asphalt mixture is designed with an interconnected porosity rate (IPR) 24.5%. At the flowability value 9s-11s, the perfusion ration(PR) of SFP specimens grouted with GTCM is 92.2%, with a 7d dynamic stability value 20020 times/mm, a 7d stability value 20.85KN. The study verifies that GT can wholly substitute natural sand used in grouted cement mortar.

Copyright

© 2025 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  - Shuyun Wang
AU  - Fan Wang
AU  - Peijun Su
AU  - Chongtao Zhu
AU  - Jingjing Feng
PY  - 2025
DA  - 2025/03/03
TI  - Experiment on Semi-Flexible Pavement Materials with Gold Tailings Cemented Mortar
BT  - Proceedings of the 2024 10th International Conference on Architectural, Civil and Hydraulic Engineering (ICACHE 2024)
PB  - Atlantis Press
SP  - 608
EP  - 617
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-658-1_62
DO  - 10.2991/978-94-6463-658-1_62
ID  - Wang2025
ER  -