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With the application of sustainable development and humanistic theory in urban construction, landscape art has become an important factor in urban construction and development. Since the 1950s, countries such as Europe and the United States have begun to study color paver machine. In the 1960s, the former Soviet Union Institute of Road Science and the Kharkiv Highway College conducted research and application on the laying of colored asphalt concrete paver machine. In the early 1980s, China also carried out technical research on colored asphalt concrete. At present, the most typical colored asphalt paver machine in China is the color tour road of Shenyang Botanical Garden and Shanghai Taiyuan Road and Guangzhou Huangpu Avenue. Color asphalt paver machine refers to paver machine with various strengths and road performances, such as decolorized asphalt and various color stones, pigments and other materials mixed at a specific temperature, and then paved and crushed. Currently, there are mainly red and green. , yellow, blue, camel and other color systems. In China, we use modern petrochemical products to manually formulate light-colored rubber materials with the same performance as asphalt. The bonding, elasticity and toughness index of the light-colored cement produced by this technology is much better than that of ordinary asphalt. The light-colored cement is mixed with a light-colored aggregate with a certain grade, and a certain color pigment is added and spread. Paving and rolling form a colored asphalt paver machine with a certain strength. The main technical indicators of the rubber compound should reach GB50092-96.
1 raw materials for colored asphalt
1. 1 Pigment Inorganic metal salt pigments can be used to fill a small amount of colored asphalt paver machine materials instead of the same volume of mineral powder. For example, 5%-7% of the total weight of aggregates can be added to the asphalt mixture to obtain red asphalt paver machine material. Add 5% - 10% chromium oxide to obtain dark green asphalt paver machine material. It is also possible to replace some ordinary stone particles into the tar sandad rubber layer by using the color stone in an amount of more than 5kg per square meter, that is, to form a colored paver machine, or to replace the natural stone material with a manually fired colored ceramic material, and the color thereof is more vivid.
1. 2 Binding material A nearly transparent synthetic resin is called a colorless asphalt binder. Colorless asphalt can be pigmented or dyed by the designer according to the design requirements. In more cases, it is directly mixed with natural colored gravel to obtain a natural color similar to that of gravel road, and at the same time, it has the function of asphalt paver machine. Landscape paving materials.
2 Advantages of colored asphalt paver machine
2. 1 Induced traffic flow In recent years, the role of colored asphalt in the organization and management of transportation has received much attention. Because the asphalt paver machine of different colors can improve the driver's recognition effect, it can also make the driver's attention more concentrated, thus inducing traffic flow, safe driving, and visualizing traffic management.
2. 2 Excellent road performance The new type of colored asphalt paver machine has higher friction coefficient than ordinary asphalt paver machine, so it has anti-slip effect.
2. 3 Beautifying environment The colored asphalt paver machine has the strong elasticity of ordinary asphalt concrete, strong vibration damping and easy cleaning and washing. It also improves the monotony of the black asphalt of ordinary asphalt paver machine, and can match the surrounding buildings and landscapes. coordination. The use of colored asphalt paves the pedestrian street, the square, and the landscape road, which not only beautifies the environment but also highlights the natural taste.
2. 4 Reducing pollution Black asphalt contains more volatile light fractions, so the environmental pollution is larger, and some even produce a “heat island” effect. The light fraction of colored asphalt has very little volatilization, thus greatly reducing pollution. The disadvantages of colored asphalt are mainly that it is not resistant to dirt, difficult to maintain and clean, and the price is 20 times higher than that of ordinary black asphalt. Therefore, the promotion of colored asphalt is limited to a certain extent. However, as the 21st century “new green building materials” are used more and more on highways, urban roads or squares, it has aroused people's and engineering interest and attention, and its development prospects are broad.