水泥对泡沫沥青混合料性能影响分析

为了研究水泥用量对泡沫沥青混合料强度与疲劳特性的影响,对不同水泥用量(0%、1%、1.5%、2%、2.5%、3%)的泡沫沥青混合料进行干、湿劈裂强度试验。通过控制应力加载方式,变化应力比进行疲劳试验。试验结果表明:增加水泥用量对干、湿劈裂强度有明显的提高作用。添加多于2%的水泥会降低材料抗疲劳性能,建议水泥用量不超过2%。考虑到泡沫沥青混合料强度要求,需要加入水泥用量至少为1.5%。

Analysis on Performance Impact of Cement to Foamed Asphalt Mixture

In order to research influence of cement dosage to foamed asphalt mixture strength and fatigue characteristics, dry, wet splitting strength tests on foamed asphalt mixture with different cement dosage （0%, 1%, 1.5% , 2% , 2.5% , 3% ） have been carried out. Fatigue tests have been carried out by stress load and stress ratio control. Testing results show that ： increase of the dosage of cement can lead to obvious improval of both dry and wet splitting strength. While the fatigue performance of material will be reduced with more than 2% of ce- ment; so, it has been recommended that the dosage of cement cannot be more than 2%. Considering requirement for foamed asphalt mixture strength, the dosage of cement shall be at least 1.5%.