A temperature-shrinkage-resistant compound and a temperature-shrinkage-resistant emulsified asphalt mixture

Abstract

The invention discloses an anti-temperature shrinkage compound and anti-temperature shrinkage emulsified bitumen mixture. The anti-temperature shrinkage compound comprises the following raw materials:rubber powder, an N-isopropylacrylamide monomer, a cross-linking agent, an initiator, and a modifier. The disclosed anti-temperature shrinkage emulsified bitumen mixture comprises the following raw materials: cation emulsified bitumen, basalt aggregate, ordinary portland cement, limestone ore powder, the anti-temperature shrinkage compound, and water. The anti-temperature shrinkage compound can increase the cracking-resistant capability, when the environment temperature is low, a gel material keeps moisture, moisture dissipation is prevented, and the mixture cracking is prevented by mixing with rubber powder; Compared with the traditional emulsified bitumen slurry layered mixture, the temperature sensitivity of the anti-temperature shrinkage emulsified bitumen mixture is reduced, and theskid resistance of the surface is increased.

Description

technical field [0001] The invention belongs to the technical field of road engineering, in particular to a temperature-shrinkage-resistant compound for roads and its application. Background technique [0002] As a seamless continuous pavement, asphalt pavement is widely used in high-grade highway construction. Since the cementing material that makes up the asphalt pavement is a polymer hydrocarbon and a typical viscoelastic material, its road performance is greatly affected by temperature and action time. Under the action of traffic load and various natural factors It manifests as different forms of disease, which seriously affects the performance of asphalt pavement. Temperature shrinkage cracking is a main form of asphalt pavement damage, especially for the traditional emulsified asphalt slurry layered mixture, due to the evaporation of water, the temperature shrinkage cracking of the modified mixture is more obvious, and it has become a scientific research worker. issu...

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Problems solved by technology

[0003] However, due to the strong temperature sensitivity of asphalt materials, the existing measures to improve the temperature shrinkage of asphalt mixture mainly focus on the design of asphalt mixture aggregate gradation and the modification of asphalt cement materials, but lack of direct and obvious effects. This is because the aggregate gradation design is greatly affected by aggregate type, lithology, and composition ratio, and the modification effect of asphalt cement is limited by the cost, type, and processing technology of modifiers.

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