Evaluation method of high temperature performance of new asphalt concrete pavement

Abstract

The invention discloses a high-temperature performance evaluation method for a newly paved asphalt concrete pavement. The high-temperature performance evaluation method comprises the steps of testinguniaxial penetration strength of indoor formed asphalt concrete test piece under a temperature field condition; testing a relation curve between the uniaxial penetration strength of the indoor formedasphalt concrete test piece and a constant temperature under a constant temperature condition, wherein the constant temperature corresponding to the uniaxial penetration strength as an equivalent temperature of the temperature field; and evaluating the high-temperature performance of the newly paved asphalt concrete pavement according to the equivalent temperature. Compared with the prior art, thehigh-temperature performance evaluation method has the advantages that the temperature field in the cooling process of the newly paved asphalt concrete pavement can be relatively accurately simulatedin an indoor environment, and the high-temperature performance of the newly paved asphalt concrete pavement can be accurately evaluated.

Description

Technical field [0001] The invention relates to a method for evaluating the performance of an asphalt concrete pavement, in particular to a method for evaluating the high-temperature performance of a newly paved asphalt concrete pavement. Background technique [0002] Asphalt pavement has the advantages of good driving comfort and convenient maintenance. Most of the newly built high-grade highways and urban roads all over the world use asphalt pavement. As we all know, asphalt is a typical temperature-sensitive material, and its mechanical properties and road performance change with temperature. The viscosity of asphalt decreases with the increase of temperature, and its state also develops from brittle and hard solid at low temperature to viscoelastic body at normal temperature, and softens and presents a fluid state at high temperature. Asphalt mixture is a combination of asphalt and mineral aggregate. When the temperature is high, the viscosity of the asphalt drops sharply, t...

AI Technical Summary

Problems solved by technology

During the paving and rolling of newly paved asphalt concrete and the subsequent cooling process, the asphalt concrete on the surface layer exchanges heat with the air, and the cooling range is significantly greater than that of the asphalt concrete inside, making it present a temperature field with a low surface temperature and a high internal temperature Therefore, the commonly used constant temperature insulation method is difficult to simulate the actual temperature of new asphalt concrete before it is opened to traffic, and cannot accurately evaluate the high temperature stability of new asphalt concrete. It is necessary to study a simplified method for evaluating the temperature field equivalent of new asphalt concrete Its high temperature stability

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