Feasibility Study of Using Quarry Waste for Pavement Application and its Optimization

Gui-Lian Zou ； Jian Xu ； Chung Wu

《International Journal of Pavement Research and Technology》 6卷3期 (2013/05) Pp. 175-183

https://doi.org/10.6135/ijprt.org.tw/2013.6(3).175

並列摘要

Using the quarry waste (QW) obtained from the Rongxing quarry, located in Conghua City, Guangdong Province, China, the objective of this research was to evaluate the feasibility of using these waste materials for pavement applications. The study included both laboratory testing for material characterization and field test section construction and evaluation. A large number of representative samples of QW were taken and laboratory tests were performed to analyze their particle size distribution, density, liquid limit, plastic limit, plasticity index, water absorption, etc. The laboratory tests showed that the QW materials did not meet the quality standards required for the bed course, with a high percentage of particles passing 0.6 millimeter and 0.075 millimeter sieves, and a significant fluctuation of the plasticity index. In Chinese pavement designs, the bed course is a functional layer in the pavement, located between the subgrade and the subbase. This layer is designed to provide drainage and other functions without contributing to the structural capacity of the pavement. Similarly, the QWs are not adequate for use as cement stabilized aggregate base course. However, the QWs could be used for subgrade enhancement and for cement stabilized soil subbase. Analysis also showed that the thickness of the base layer in an asphalt pavement structure could be reduced by incorporating the QWs for subgrade enhancement. An economic analysis was conducted, which indicated a savings of nearly 16.25 million RMB (≈ 2.58 million US$) compared with the original design, with 100% consumption of the waste materials.

並列關鍵字

Quarry waste ； Recycling ； Roadbed reinforcement ； Structural optimization

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