Asphalt rubber sealant can be used for cement, asphalt concrete and other pavements, as well as caulking sealing and repairing of buildings. It is a very common low-cost caulking sealing and repairing material. High stability, low temperature is not easy to brittle. In actual production, the waste rubber asphalt sealant can use both tire rubber powder and tire rubber powder and reclaimed rubber, and the processing technology is different.
1. Preparation of rubber asphalt sealant from petroleum asphalt and tire rubber powder
(1) Formula: 70 parts of petroleum asphalt, 12 parts of tire rubber powder, 3 parts of coumarone resin, 1 part of polyisobutylene, 10 parts of calcium carbonate, total: 96 parts.
(2) Preparation process: heat the asphalt to melt, dehydrate, and remove impurities. When the temperature drops to about 160 °C, add preheated and dried calcium carbonate. After fully mixing the rubber sheets, add coumarone resin and polyisobutylene under constant stirring. and rubber powder, and then continue to use the rubber sheet for 30 minutes.
2. Preparation of rubber asphalt sealant from petroleum asphalt, rubber powder and reclaimed rubber
(1) Formula: 100 parts of petroleum asphalt, 300 parts of waste rubber powder, 150 parts of reclaimed rubber, 450 parts of petroleum softener, total: 1000 parts.
(2) Preparation process: heat the asphalt in a pot, raise the temperature to 120-180 ℃ for dehydration, filter to remove impurities, and then add the remaining components to cook.
3. Advantages of rubber asphalt sealant
The rubber asphalt sealant prepared by blending petroleum asphalt with tire rubber powder or reclaimed rubber has good elongation performance and flexibility, can fill various cracks and cavities under certain pressure, and can adapt to the settlement and dislocation of the joint part; Good chemical properties, good temperature resistance, good adhesion with concrete, metal and other materials. The rubber-asphalt sealant is simple to operate, easy to construct, and suitable for cracks of various forms.
my country is a big country of rubber consumption. Every year, a large number of waste rubber products, mainly waste tires, are produced. Processing waste rubber into rubber powder and reclaimed rubber is the main way to deal with waste rubber. Continuous in-depth research and development of the application of waste tire rubber powder and reclaimed rubber in rubber asphalt sealant can reduce the manufacturing cost and promote the processing speed of waste rubber, which is not only conducive to environmental protection, but also can improve economic benefits.
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