【摘要】 为了确保沥青稳定碎石基层的低温抗裂性,对3种ATB30级配进行了冻融后低温(-15℃、-5℃、5℃、15℃)劈裂试验和低温(-15℃、-10℃、-5℃、0℃、5℃、10℃、15℃)弯曲试验,全面评价了ATB30的低温抗裂性。结果表明:采用韩国SK-70号A级沥青的ATB30脆化点温度在-5—0℃之间,其弯曲应变能与温度的关系曲线接近4次抛物线,可用于ATB30的弯曲应变能的预测和沥青路面低温抗裂设计;采用级配中值的ATB30的低温抗裂性最好。更多还原

【Abstract】 To ensure low temperature anti-cracking performance of asphalt treated base,the low temperature anti-cracking performance of three kinds of aggregate graduation ATB30 were comprehensively evaluated by freeze and thaw low temperature (-15 ℃、-5 ℃、5 ℃、15 ℃) split test and low temperature(-15 ℃、-10 ℃、-5 ℃、0 ℃、5 ℃、10 ℃、15 ℃) bend test.The results showed that brittle temperature of ATB30 with Korean SK-70 grade A asphalt was between-5 ℃ and 0 ℃.The functional relationship between curvature strain energy of ATB30 and temperature was near biquadratic parabola,and it could be used to predict curvature strain energy of ATB30 and low temperature anti-cracking design of asphalt pavement.The low temperature anti-cracking performance of ATB30 with aggregate graduation limit average was the most excellent.更多还原