沥青混凝土抗剪强度及抗压回弹模量试验研究

Research on Shearing Strength and Compressive Resilient Modulus Experiment of Asphalt Concrete

对高模量沥青混凝土、SBS改性沥青和70#普通沥青混凝土进行了15,20,40,60℃条件下的单轴贯入及抗压回弹模量试验,并结合单轴无侧限抗压强度试验结果对黏聚力c值进行计算,结果表明:高模量沥青混凝土在各温度下均具有相对较高的抗剪强度、黏聚力和抗压回弹模量,尤其在高温时仍然优势明显.通过指标相关性分析,得到了由抗剪强度换算成抗压强度、黏聚力c值及抗压回弹模量的回归方程.

Uniaxial penetration and compressive resilient modulus tests of the high modulus asphalt concrete（CHMAC）, SBS modified asphalt and 70# plain asphalt concrete under the condition of 15,20,40, 60 ℃ have been performed, and the cohesion c of asphalt concrete has been calculated with the result of uniaxial compressive test. It can be found from the test that the HMAC has relatively high shearing strength, cohesion and compressive resilient modulus under various temperature conditions and especially at high temperatures. The regression equation was obtained through the correlation analysis of each index, which can be used to convert shearing strength to compressive strength, c values and compressive resilient modulus.