煤矸石混合料抗压回弹模量试验研究

Experimental Study on Compressive Resilient Modulus of Coal Gangue Mixture

路基回填材料的抗压回弹模量是路面结构基层或底基层设计的一个重要参数指标,文章针对邢台地区某类煤矸石的化学物理性质,根据均匀设计原理,在煤矸石中加入少量的粉煤灰、消石灰粉、水泥配制成不同配比的煤矸石混合料,并对抗压回弹模量进行试验研究。建立了煤矸石混合料抗压回弹模量与各掺合料掺量之间的回归方程,并提出此类煤矸石混合料抗压回弹模量的范围。

Compressive resilient modulus of roadbed backfill material is an important parameter index for pavement baseand subbase design. A coal gangue of Xingtai area was selected, and mixed with a small amount of fly ash, lime powderand cement on the basis of its physical and chemical properties. According to the principal of uniform design, differentproportions of coal fly ash, ground hydrated lime and cement were added to the coal gangue, obtaining coal gangne mixturewith different compositions, and compressive resilient modulus of each composition were conducted. The regressionequation between compressive resilient modulus of coal gangue mixture and the blending amount of each admixture wasestablished, and the range of such gangne mixture＇s compressive rebound modulus was given.