工业废渣路面基层材料试验研究

以钢渣、碎石为集料，通过实验室试验研究了水泥、水泥粉煤灰、石灰粉煤灰稳定路面基层材料的无侧限抗压强度、劈裂强度、抗压回弹模量和抗冲刷性能。结果表明，钢渣作为公路基层集料具有较碎石更为良好的性能。钢渣作为集料的基层材料强度高于碎石作为集料的基层材料；用水泥稳定钢渣可获得相对高的无侧限抗压强度，用石灰粉煤灰稳定钢渣获得相对高的劈裂强度。掺加粉煤灰的基层材料在180d龄期问抗压回弹模量保持增长，水泥稳定基层材料90d以后抗压回弹模量无明显增长。石灰粉煤灰稳定钢渣的回弹模量显著高于其他基层材料。水泥稳定钢渣抗冲刷性较水泥稳定碎石好，水泥粉煤灰与石灰粉煤灰稳定类用钢渣代替碎石作为集料对冲刷性能影响不明显。

An Experimental Study on Pavement Base Materials with Industrial Wastes

Portland cement, cement-fly ash, and lime-fly ash stabilized pavement base materials using steel slag and crushed stone as aggregate was prepared. Experiments on unconfined compressive strength, splitting strength, compressive resilient modulus, and scour-resistance were conducted. Steel slag shows superior performance as aggregate than macadam. Materials using steel slag show superior strength than materials using crushed stone. While cement stabilized steel slag shows the highest uncon- fined compressive strength, lime-fly ash stabled steel slag shows the highest splitting strength. Resilient modulus of base materials with cement-fly ash keeps rising in 180d curing age, while resilient modulus of base materials with cement only exhibits little change. Resilient modulus of lime-fly ash stabilized steel slag is significantly higher than other materials. Scour-resistance of cement stabled steel slag is better than that of cement stabled crushed stone. However, influence of aggregate type-on scour-resistance is in- significant for both cement-fly ash and lime-fly ash stabilized base materials.