Research on the application of chiseling trolley in the treatment of asphalt mixture surface layer
Poor interlayer bonding performance is an important disease in current highway construction in China.This project takes Chengnan expressway as the research object,and Sichuan Chengnan expressway Expansion Section 9 as the research object.Using a chiseling trolley,sandblasting and chiseling are carried out on the surface of the specimen,and the chiseling trolley is used to detect the exposed bone rate,structural depth,and pendulum friction factor of the concrete base surface.The interlayer shear and tensile properties are measured using instruments such as shear and pull-out instruments,and the economic feasibility of the two reinforcement methods is compared.Research has found that after drilling with a chiseling machine,the proportion of bone formation at the chiseling interface is greater than 85%,the structural thickness is 1.17mm,the shear strength is 0.8MPa,and the tensile strength is 0.54MPa,which is significantly improved compared to traditional sandblasting technology.For the interface modification of concrete,the friction coefficient of the pendulum cannot be used for evaluation.The use of chiseling technology can eliminate surface suspended solids,improve the roughness of the contact surface,improve the efficiency of interlayer bonding,achieve good roughening effect,and also improve the economy of the product.
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