Vulcanized rubber powder is a powdery elastomer obtained by pulverizing waste rubber products by mechanical pulverization, freeze pulverization and other methods. It is widely used in the rubber industry and non-rubber industry to achieve the dual purpose of improving performance and reducing costs. In the actual production and application process, vulcanized rubber powder has a variety of application methods in road paving, which has played an irreplaceable role in improving the service life of the road, mainly including the following two application methods.
1.Vulcanized rubber powder + asphalt
At present, rubber asphalt is the most commonly used method for vulcanized rubber powder in road paving. It mainly uses the swelling reaction of vulcanized rubber powder and asphalt in the mixing process to achieve the coexistence of the two, and finally improves the physical and chemical properties of asphalt. effect. When vulcanized rubber powder is used in the asphalt pavement, the properties of the vulcanized rubber powder and the performance of the asphalt will directly affect the use performance and service life of the rubber asphalt. It is necessary to select a suitable index of vulcanized rubber powder to determine the addition ratio and preparation of the vulcanized rubber powder reasonably. Craft.
2.Vulcanized rubber powder + concrete + asphalt
In the actual processing and application process, vulcanized rubber powder, concrete and asphalt are made into rubber powder. Asphalt concrete can be mixed with rubber powder and asphalt to rubber asphalt in advance, and then mixed with mineral materials, among which rubber asphalt can be used as a binder. Or blend the vulcanized rubber powder with the mineral material before spraying it into the asphalt to make rubber powder modified asphalt concrete.
3. Dosage of vulcanized rubber powder in road paving
The amount of vulcanized rubber powder used in road paving has a lot to do with the production process. In general, the amount of vulcanized rubber powder modified asphalt concrete is controlled between 2-5% of the amount of mineral materials, and large-sized vulcanized rubber powder (3- 12 mesh) can reduce the rut on the pavement, improve the anti-slip performance, and make the road surface less prone to reflection cracks.
At present, vulcanized rubber powder is widely used not only in road paving, but also in bridge pavement. Under proper process conditions, the amount of vulcanized rubber powder can be increased to about 30% of the total asphalt. With the continuous development and progress of the production process of vulcanized rubber powder, the application of vulcanized rubber powder in road pavement has continued to increase, and its application methods in road pavement have been increasing, which can not only reduce the cost of road laying and improve road use Performance and life, can also consume more waste rubber products, to achieve the recycling of waste rubber resources, economic and environmental protection have indelible significance.