Asphalt seam sealant slurry capable of adapting high temperature environment and preparation method of same

Abstract

The invention discloses asphalt seam sealant slurry capable of adapting a high temperature environment and a preparation method of same. The asphalt seam sealant slurry is produced from AH-90 asphalt,SBS, a cosolvent, a stabilizer, a softener, resin and wasted rubber powder. Large amounts of the wasted rubber powder and rock asphalt are added to the seam sealant slurry, so that a seam sealant isimproved in high temperature performance and adhesion force, is enhanced in anti-aging property, and is greatly reduced in cost; due to addition of resin, adhesion effect between the seam sealant andseams is greatly improved; due to addition of the SBS in certain block ratio and molecular weight, the seam sealant is definitely improved in high temperature stability and low temperature ductility.Compared with the prior art, the seam sealant is not only improved in high temperature performance and adhesion force but also enhanced in anti-aging property and greatly reduced in cost. Especially,due to the improvement of the high temperature performance, the seam sealant is applicable as a seam sealing material in a high temperature environment.

Description

technical field [0001] The invention belongs to the field of repair and maintenance of roads and paved bridge decks, and is suitable for crack and joint filling treatment on asphalt pavement, cement concrete pavement and bridge pavement deck in vast areas. In particular, it relates to an asphalt joint grout adaptable to high-temperature environment and a preparation process thereof. Background technique [0002] Cracks in pavement (asphalt pavement, cement concrete pavement and bridge pavement) are the earliest and most common form of disease in roads in my country and even in the world, which cannot be eliminated fundamentally. If the cracks are not treated in time, the road surface water will penetrate into the base layer along the cracks, resulting in irreversible pavement damage. Data from the SHRP research program in the United States show that timely assessment of pavement cracks and early repair and maintenance can not only prolong the service life of the pavement, i...

AI Technical Summary

Problems solved by technology

[0004] Defects in high temperature performance: At present, the commonly used pavement joint filling materials often produce "high temperature flow phenomenon" in high temperature environments, and the flowing joint filling glue will be squeezed out of the cracks as the cracks and cracks caused by the "heat expansion" of the road surface become smaller. It is taken away by the moving vehicle in an instant, so that the validity period of the joint glue is shortened

[0005] Low-temperature performance defect: When the pavement is in a low-temperature environment, affected by the ambient temperature, the crack width will widen as the pavement "cold shrinks". When the joint glue and the crack wall will not re-crack

At present, because most of the joint filling materials in foreign countries are made of resin materials, their adhesion performance is good, but their deformation ability is poor (low temperature ductility), which cannot meet the low temperature performance requirements of joint filling materials.

[0006] 2. Defects in anti-aging performance

[0008] 3. Defects in adhesion performance

Judging from the current practical application situation, resin-based joint-filling adhesive materials have stronger adhesion performance than other joint-filling adhesive materials, and 90% of joint-filling materials in market research have poor adhesion to the crack wall Although the remaining 10% of the joint filling material has a strong adhesion to the crack wall, it also has the fatal flaw of poor aging resistance

[0010] It can be seen that there is no material currently used for joint filling materials that can have all the advantages of good high and low temperature performance, strong anti-aging performance and strong adhesion performance.

Images