Yong Chen1,2, Zhi Liu3, Xianhu Hu4, Kai Wang2, Yingjie Yuan2, Weixuan Xu2, Changjin TIAN5, Wei Lu1, Zhenguo Lu1, and Kun Meng1This email address is being protected from spambots. You need JavaScript enabled to view it.
1College of Transportation, Shandong University of Science and Technology, Qingdao 266590, China
2Qingdao Greensail Recycled Building Materials Co., Ltd., Qingdao 266043, China
3Shandong Academy of Building Research Co., Ltd., Qingdao 266000, China
4Shandong Construction Quality Inspection and Testing Center Co., Ltd. Huangdao Branch, Qingdao 266599, China
5China construction infrastructure corp., Ltd, Beijing 100029, China
Received: December 25, 2024 Accepted: April 29, 2025 Publication Date: June 15, 2025
Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.
This study focuses on the application of recycled construction waste aggregates in lime-fly ash stabilized base layers. Specimens of lime-fly ash stabilized crushed stone base layers with different mix proportions were prepared, and experimental research was conducted on the mechanical properties and frost resistance of the recycled aggregate lime-fly ash stabilized crushed stone base layers. First, the feasibility of preparing lime-fly ash stabilized crushed stone base layers using the experimental raw materials was verified through experiments. Subsequently, compaction tests were performed to determine the maximum dry density and optimal moisture content of the mixtures. Building on these findings, unconfined compressive strength tests (UCST) and freeze-thaw cycle tests(F-TCT) were conducted to evaluate the impact of various mix proportions and curing durations on material strength and frost resistance. The experimental results demonstrate that the recycled aggregates meet the relevant standards, exhibiting strong mechanical properties and frost resistance. Additionally, the incorporation of stabilizers significantly improves both the early strength and frost resistance of the recycled aggregate base layers. This study investigates the viability of substituting natural aggregates with recycled aggregates in the construction of lime-fly ash stabilized crushed stone layers for road engineering, thereby contributing to the sustainable advancement of the industry.
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