Search

In order to prepare high-performance asphalt pavement repair materials, nine kinds of cold patching asphalt with different proportions were developed. The contact angle of cold patching asphalt was measured and its cohesive energy, adhesion energy, peeling energy and energy ratio were calculated by surface free energy theory. The theoretical calculation results were verified by quantitative adhesion testing methods. The results show that the optimum ratio obtained by the rotational viscosity at 60 °C, the water boiling method, the photoelectric colorimetry and the binder bond strength test is consistent with that obtained by the surface free theory, and there is no significant difference between the results reflected by the three adhesion test methods. The best mix ratio of cold patching asphalt is asphalt): m (diesel): m (SBS): tackifier): m(anti-stripping agent) = 100: 30: 3: 5 : 0. 5. The adhesion can be evaluated quantitatively by combining photoelectric colorimetry with contact angle test or by combining binder bond strength test with contact angle test. [ABSTRACT FROM AUTHOR]

Tn order to improve the shortcomings of airport pavement repair mortar, such as high brittleness and poor bonding performance, a kind of quick mortar was prepared by using waterborne epoxy resin (WER), polypropylene (PP) fiber and sulfoaluminate cement (SAC), and its working performance, mechanical properties, damping properties and sulfate corrosion resistance were studied. The results show that PP fiber and WER can significantly improve the toughness and bonding properties of the quick repair mortar, making the 2 h compressive and folding strength and bonding strength of the quick repair mortar reach 22.3, 5.1 and 3.7 MPa respectively, meeting the requirements of civil airport specifications, and improving the damping performance and sulfate erosion resistance of the quick repair mortar. [ABSTRACT FROM AUTHOR]