Composite phase transition cooling bituminous paving material

Abstract

The invention provides a composite phase transition cooling bituminous paving material, wherein the material can be used for preparing a set composite phase transition material from a phase transition material with an energy storage efficacy by a sol-gel method, drying, grinding and surface hydrophobic modification are carried out, the set composite phase transition particles are obtained after dried, the set composite phase transition particles after screened is used to replace an aggregate or a filling material with certain particle sizes in an asphalt mixture, and then the composite phase transition cooling bituminous paving material is obtained. The material has a good effect for reducing the bituminous paving temperature, can raise high temperature stability of the bituminous paving, and can simultaneously relieve urban heat island effect.

Description

technical field [0001] The invention relates to a preparation method of a composite phase change cooling asphalt pavement material, which can be applied to the field of road engineering. Background technique [0002] With the rapid development of social economy and highway transportation, asphalt pavement is widely used in the construction of highways, urban roads, airports and other transportation facilities due to its advantages of high smoothness, good driving comfort and low noise. According to statistics, asphalt pavement accounts for about 50% of the existing roads in our country, and more than 90% of the highways under construction, reconstruction or large and medium repairs use asphalt pavement. But asphalt is a typical viscoelastic material, which determines that the performance of asphalt pavement is easily affected by load and temperature. Especially with global warming and climate anomalies, summer is hot in most parts of our country, and the temperature often e...

AI Technical Summary

Problems solved by technology

[0004] Chinese patent CN101029216A "A self-regulating road phase change material and its production method" proposes a kind of fatty acid, potassium sulfate, chitosan, polyacrylamide, floating beads, brucite, pyrophyllite, silicone emulsion, A phase-change material composed of ten kinds of paraffin and sodium hydroxide in a certain mass ratio. The temperature adjustment mechanism is theoretically analyzed, but how to apply it to roads is not mentioned.

Chinese patent CN101333094A "preparation method of a phase-change asphalt pavement material", Chinese patent CN101333094A "preparation method of a phase-change asphalt pavement material", proposes that the phase-change material, silica sol, support materials and coupling agents to prepare phase-change asphalt modifiers, including calcium chloride or magnesium chloride, but the addition of calcium chloride coagulants to silica sol will reduce the crystallization performance of norethylene glycol, and even form The complex structure greatly reduces the crystallinity of polyethylene glycol, resulting in a decrease in the latent heat of phase transition (for reference, see Liu Shaohua et al., Research on the Interaction between Polyethylene Glycol and Calcium Ions, Journal of Biomedical Engineering, 1990, 7 (4) ; Zhuang Jinshu, Characterization of complexes formed by polyethylene glycol and calcium chloride, Journal of Fujian Normal University (Natural Science Edition), 1991, 7 (2))