Bitumen emulsion consumption
GlobeCore develops and manufactures extra-heavy duty colloid mills for production of water-bitumen emulsions and other dispersion systems.
The most efficient alternative to organic bitumen solutions and hot bitumen mastics is the use of water-bitumen emulsions. Such emulsions have several advantages and are widely used in road construction industry. Bitumen emulsions for road construction are quite economical, environmentally friendly and safe, while the physical and chemical parameters of emulsions are better than those of other bitumen dispersion systems. Due to low viscosity, high adhesion and good elasticity, water-bitumen emulsions ensure high quality and reliability of modern roads and highways.
Water-bitumen emulsions are used in road construction mostly for tack coat formation and pavement surface treatment, for patch repairs and saturation of pavement. Not the least important indication is consumption of the emulsion for road construction. Consumption depends on nature of treatment and the surface treated. For instance, when treating asphalt pavement, 500 grams of emulsion are used for 1 square meter, while treatment of gravel increases the consumption to 1200 gram per square meter.
Consumption may vary depending on application method. Normal bitumen emulsion consumption for tack coating is quite lower (0.4 – 0.6 kg per square meter), than when using liquid (0.6 – 0.8 kg per square meter) or viscous (0.8 – 1.0 square meter) bitumen. Surface treatment of pavement is performed by spraying bitumen emulsion and distribution of fine gravel. It is important to control emulsion and gravel consumption, which must be finely portioned. Besides, surface treatment mostly employs emulsions with 50 – 70% of bitumen, which must be warm for application.
Pavement surface treatment can be double or single. In single treatment, water-bitumen emulsion consumption is 1.6 – 2.0 kr per square meter. Double treatment is applied when pavement is damaged. There are two methods of double treatment. In the first method the consumption of emulsion is 1.0 – 1.3 kg per square meter, than gravel is applied, than emulsion is sprayed again with consumption of 1.6 – 2.0 kg per square meter. In the latter case, water bitumen emulsion is applied once, and gravel is applied twice, but emulsion consumption is 2.0 – 2.3 kg per square meter.