High-toughness composite SBR modified asphalt for warm-mixed asphalt technology, and preparation method thereof

Abstract

The invention relates to high-toughness composite SBR modified asphalt for a warm-mixed asphalt technology, and a preparation method thereof, and belongs to the technical field of composite modified asphalt. The high-toughness composite SBR modified asphalt is prepared through mixing matrix asphalt, an alkyl condensation substance, an asphalt modifier and a stabilizer. The raw materials comprise,by mass, 85-95% of the matrix asphalt, 1-5% of the alkyl condensation substance, 2-10% of the asphalt modifier and 0.2-2% of the stabilizer. The preparation method comprises the following steps: (1) weighing the matrix asphalt according to the mass percentage of 85-95%, then placing the matrix asphalt in a heating and mixing container, carrying out heating to a temperature of 120-160 DEG C to enable the matrix asphalt to be molten completely, carrying out heat insulation while carrying out stirring; (2) weighing the asphalt modifier according to the mass percentage of 2-10%, weighing the alkyl condensation substance according to the mass percentage of 1-5%, then adding the asphalt modifier and the alkyl condensation substance to the molten matrix asphalt, and carrying out stirring and mixing; (3) heating to the temperature of 160-180 DEG C, weighing the stabilizer according to the mass percentage of 0.2-2%, then adding the stabilizer to the resulting mixture from the step (2), uniformly stirring and mixing, removing the material from the heating and mixing container to prepare the high-toughness composite SBR modified asphalt.

Description

technical field [0001] The invention relates to a high-viscosity and toughness composite SBR modified asphalt which can be used in warm-mix asphalt technology and a preparation method thereof, belonging to the technical field of composite modified asphalt. Background technique [0002] Asphalt concrete is one of the most used building materials in the world. With the rapid development of my country's expressways, the traffic volume continues to increase, the performance of vehicles continues to improve, and the speed of vehicles continues to increase. Road safety and environmental protection issues are becoming more and more serious. At the same time, with the development of the national economy, the rapid growth of traffic volume, the increasing number of heavy-duty and overloaded vehicles, and the channelization of vehicles, the requirements for traffic road surfaces are getting higher and higher. Heavy-duty emulsified asphalt can no longer adapt to the special conditions of...

AI Technical Summary

Problems solved by technology

[0005] Chinese patent CN101838468A "a nano-silica powder composite modified asphalt material composition and its preparation method" discloses a nano-silica powder and SBR styrene-butadiene rubber modified asphalt technology, which improves the high-temperature performance of the asphalt material, and also Improves the low-temperature performance of asphalt materials, but does not mention the improvement of the viscosity, toughness and toughness of asphalt—improving the tensile strength of the pavement