A common type of pavement joint glue and preparation method thereof

Abstract

The invention discloses a common road joint filling glue and a preparation process thereof, which is made of AH-90 asphalt, SBS, cosolvent, stabilizer, modifier, softener, granite mineral powder, resin and waste rubber powder. Adding a very small amount of SBS with a certain block ratio and molecular weight in the present invention can greatly improve the high-temperature stability and low-temperature ductility of the joint glue; To improve the low-temperature ductility of the joint glue, improve its anti-aging performance and greatly reduce the cost; the addition of modifiers can enhance the chemical stability of the entire material system, and further improve the low-temperature ductility of the joint glue Effect; the addition of resin greatly improves the adhesion between the caulking glue and the crack.

Description

technical field [0001] The invention belongs to the field of road repair and maintenance, and is suitable for crack and joint filling treatment of asphalt pavement and cement concrete pavement in vast areas. In particular, it relates to a common road surface joint filling glue and a preparation process thereof. Background technique [0002] Asphalt pavement and cement concrete pavement often produce various diseases (cracks, ruts, wrapping, settlement, etc.) during the service process after completion. Among them, cracks are the earliest and most common way of disease. The study of the SHRP program in the United States shows that early treatment of cracks can not only prolong the service life of the pavement, but also greatly reduce the maintenance cost. [0003] Also from the research conclusion of the SHRP-H-358 program, crack filling treatment is the most cost-effective among all maintenance methods. Judging from the current production and application of joint filling ...

AI Technical Summary

Problems solved by technology

Judging from the current production and application of joint filling materials in China, domestic joint filling materials often show good performance (stability, fatigue resistance, aging resistance) at high temperatures, but poor performance at low temperatures, the most obvious It is because of its poor adhesion to the original pavement and easy desorption, which leads to "secondary cracking" at the cracks of the pavement. This defect greatly limits its practical application on the pavement. At present, most of the domestic joint filling adhesives are still modified Asphalt is the main method, but at present this kind of material often has a relatively large amount of SBS added, and the adhesion is not good. For example, the amount of SBS introduced in the patent CN201110076227.0 speed-welding self-healing joint filling glue and its use method is 6%, CN201010189080.1 A kind of resin type caulking glue and the addition of SBS introduced in its preparation is 10%, CN201710199789.1 The addition of SBS introduced in CN201710199789.1 environment-friendly pavement heating sealant material and its preparation method and application The amount is 4-6%. It can be seen that the amount of SBS added in the modified asphalt used for joint glue is relatively large, which is mainly due to the lack of specific screening of SBS and the general use of commercially available SBS; Although the material has good adhesion to the original road surface, because most of it is made of resin material, its aging resistance is poor, so the validity period of this material is often short, and the price is very expensive, and its application is also severely restricted

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