Preparation method of asphalt concrete warm mixing rutting and cracking resisting agent

Abstract

The invention relates to a preparation method of an asphalt concrete warm mixing rutting and cracking resisting agent. The preparation method concretely comprises the following steps: fully mixing wax, resin and a cross-linking agent in a reaction kettle to obtain a modifying mixture; and adding a surfactant, a plasticizer and assistant to the modifying mixture, carrying out melt blending, and granulating the mixture through a granulating tower or a rotary belt condensation granulator to obtain the warm mixing rutting and cracking resisting agent. Compared with the prior art, the preparation method disclosed in the invention has the advantages of simplicity in operation, easiness in industrial generation, facilitation of reduction of the mixing temperature and the compacting temperature of asphalt concrete, reduction of the discharge of harmful gases, improvement of the moisture resistance, and high-temperature viscosity reducing and low-temperature viscosity increasing effects on asphalt; and the prepared warm mixing rutting and cracking resisting agent obviously improves the softening point, the ductility and the 60 DEG C viscosity of the asphalt, reduces the mixing and lying temperature, and improves the rutting resistance, the low-temperature cracking resistance and the water damage resistance of the asphalt concrete.

Description

technical field [0001] The invention belongs to the technical field of asphalt concrete additives, and in particular relates to a preparation method of a warm-mix anti-rutting agent for asphalt concrete. Background technique [0002] The mixing temperature of ordinary asphalt is about 160 degrees, and that of modified asphalt is about 180 degrees. Under hot mixing conditions, too high temperature of asphalt will accelerate aging and affect road performance, and asphalt will emit toxic gases during heating. , the higher the temperature, the more discharged. The warm mix asphalt mixture mainly uses certain technical measures to make the asphalt well coated on the aggregate at a relatively low temperature, and has good bonding and lubricating effects, so that the asphalt can be used at a relatively low temperature. Stirring and construction at low temperature, while maintaining the performance of the mixture not lower than HMA. Currently on the market, the mixing technology t...

AI Technical Summary

Problems solved by technology

[0004] Low temperature construction will have a water stability problem. The temperature is low, the fluidity of the asphalt mixture is reduced, it is not easy to compact, the degree of compaction is insufficient, the void ratio after compaction is too large, and water damage is prone to occur

Moreover, the function of the current warm mix agent is single, and it is difficult to take into account the high, low temperature and water damage performance of the asphalt mixture while satisfying the warm mix.

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