Abstract:

The compression rebound modulus of the material is an important parameter index for pavement base or subbase design. In this paper, the coal gangue was selected from Xingtai area, which was mixed with a small amount of fly ash, lime powder and cement on the basis of its physical and chemical properties. According to the method of uniform design, 8 groups mix ratios were designed and the compression rebound modulus of each group was conducted. The experimental results were analyzed by regression analysis model, and the regression equation between the compression rebound modulus of coal gangue mixture and the blending amount of each admixture was established. Besides, the scope of such gangue mixture’s compressive rebound modulus was proposed as design parameters for roadbed project that sue gangue mixture.

Key words: coal gangue mixture, uniform design, regression analysis, compression rebound modulus