Preparation method of pavement joint sealant

Abstract

The invention discloses a preparation method of road surface joint glue. The petroleum asphalt with a mass percentage of 50-75% is heated to 160-170°C to a flow state; in the stirring state, 15-45% styrene-butadiene is sequentially added ethylene-styrene block copolymer, 30-60% compatibilizer, 4-10% polymer; then grind in a colloid mill with a rotation speed of 2000-4000rpm for 15min-45min, and the grinding temperature is 165-185°C; Then add 25-50% waste rubber powder, then stir at 175-195°C for 60-90 minutes; then at 150-170°C, add high-temperature viscosity-reducing components and plasticizers, cool down to 120-140°C and stir Swell in the state for 2-5 hours; finally cut the mixture, add 0.06-0.2% stabilizer, and react for 1-5 hours to prepare the road surface joint glue. This improves high temperature stability, low temperature flexibility, elastic recovery and fatigue resistance, and is suitable for pavement crack treatment in cold and extremely cold climates.

Description

technical field [0001] The invention relates to the technical field of road surface joint glue, in particular to a preparation method of road surface joint glue. Background technique [0002] Pavement cracks are one of the main diseases of our country's highways, which seriously affect the performance of roads, advance the maintenance period of roads and greatly increase maintenance costs, and shorten the service life of roads. Especially in the Northeast of my country, roads are affected by temperature changes during operation and produce more temperature cracks, which have a great impact on the overall performance of the pavement structure. [0003] There are many ways to repair pavement cracks. The traditional crack treatment method is to use heated liquid ordinary asphalt and pour it directly into the cracks when the temperature is the lowest. However, the high and low temperature performance of ordinary asphalt is poor. At low temperatures in winter, the asphalt loses i...

AI Technical Summary

Problems solved by technology

[0003] There are many ways to repair pavement cracks. The traditional crack treatment method is to use heated liquid ordinary asphalt and pour it directly into the cracks when the temperature is the lowest. However, the high and low temperature performance of ordinary asphalt is poor. At low temperatures in winter, the asphalt loses its elasticity and still cracks. , becomes soft at high temperature in summer, and is easily taken away by car tires. Therefore, the traditional crack treatment method is inefficient and cannot meet the requirements of road maintenance.

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