Asphalt Pavement Cracks And Pot Holes Damage Mechanism And Repair Technology

This thesis primarily analyses the distress mechanisms and repair techniques of the asphalt's cracks and potholes. Study on the causes and repair mechanisms of cracks and potholes scientifically and rationally. The thesis offers the theoretical foundation and actual experience for the construction.According to asphalt road cracks and potholes distress geometric forms and causes, to classify the cracks and potholes rationally and carefully, and divide them according to their size and severity grade. This thesis studies on the six kinds of typical cracks of the asphalt road thoroughly, to obtain the basic reason of the crack occurrence. And with surface tension theory to analyses the four kinds occurrence of potholes. Obtain the ideal effect for the specific request.According to analyze cracks repair mechanism and repair time, obtain the request of the cracks slot wall and patching material when crack patching and the best patching time. This thesis analyzes the crack slot parameter (width- deep ratio), Carries on the detailed analysis from the slot theory width and the actual construction width, to obtain the better slot parameter (width-deep ratio). According to the concrete elasticity coefficient far bigger than the module of the crack patching material, this thesis uses the big distortion FEM method to the crack patching material, and obtain the biggest stress points of the crack patching material, as well as the relations tension stress angle between shear stress angle and computational method of biggest stress.According to the analysis and the comparison to the asphalt road crack patching material, to obtain the applicable scope of each kinds of material, simultaneously to propose the five kind of appraisals target of crack patching material, as well as discuss five appraisals targets testing methods, to provide the reasonable research plan for later the experimental study of the patching material. According to permanent patching request, refine the crack patching construction craft steps, supply the method for the personnel directly to the asphalt road crack. Study on the crack patching equipment match reasonably, obtain the reasonable match formula.This thesis analyzes and compares the padding type, the digging type, hot dries the type and the jet type patching technology, obtain the suitable weather and the temperature of each kinds of potholes patching technology. Simultaneously according to permanent potholes patching specification, study the construction craft of the potholes, refined the potholes patching construction craft step. Simultaneously supply the principle and the thought of the heavy potholes patching technology, improve the compactness and control potholes padding quantity precisely.