In order to study the deformation resistance of steel slag asphalt mixture under rainy condition, limestone asphalt mixture and steel slag asphalt mixture were soaked at room temperature for 120 days, and then rutting test and triaxial compression test were carried out respectively. The results show that the deformation resistance of SSAM is improved after 120 days of immersion, the cohesion does not decrease significantly, and the internal friction angle increases by 25.1%; the deformation resistance of LAM decreases significantly, the cohesion decreases by 27.1%, and the internal friction angle decreases by 21.1%. To study the reason for the increase of anti deformation ability, the adhesion test of asphalt and the microscopic study of steel slag surface were carried out respectively. The experimental results show that the cohesion of steel slag does not decrease significantly after immersion, which is due to the excellent adhesion between steel slag and asphalt, and the increase of internal friction angle is due to calcium hydroxide and other crystals formed on the surface of steel slag mixture after immersion, which increases the surface roughness of steel slag aggregate and increase the internal friction angle of steel slag asphalt mixture.The mechanical properties of semi-rigid asphalt pavement are analyzed by ANSYS. It is found that the shear stress of this type of pavement is large, and it is easy to produce permanent deformation. Under the influence of moisture, the anti deformation ability of steel slag asphalt mixture can grow, which is conducive to the high temperature deformation resistance of asphalt pavement. From the test section of two years of operation, the steel slag asphalt mixture pavement has no pavement diseases such as cracking, loosening, rutting,which shows good road performance.

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钢渣沥青混合料常温浸水变形研究

为了研究钢渣沥青混合料在雨天条件下的变形抗力，将石灰石沥青混合料和钢渣沥青混合料在室温下浸泡120天，然后分别进行车辙试验和三轴压缩试验。结果表明，浸泡120天后SSAM的变形抗力有所提高，内聚力没有明显下降，内摩擦角增加25.1%；LAM的变形抗力显着下降，内聚力下降27.1%，内摩擦角下降21.1%。为研究抗变形能力增加的原因，分别进行了沥青粘附试验和钢渣表面微观研究。实验结果表明，钢渣浸泡后的内聚力没有明显下降，这是由于钢渣与沥青之间的附着力极好，而内摩擦角的增加是由于钢渣表面形成了氢氧化钙等晶体。钢渣混合料浸渍后，增加了钢渣集料的表面粗糙度，增加了钢渣沥青混合料的内摩擦角。采用ANSYS分析了半刚性沥青路面的力学性能。研究发现，该类路面剪应力较大，容易产生永久变形。在水分的影响下，钢渣沥青混合料抗变形能力增强，有利于沥青路面的高温抗变形能力。