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Anonymous users2024-02-15Waterproofing engineering modified asphalt waterproofing membrane and coating are mainly used for waterproofing projects of high-end buildings. With the progress of science and technology and the development of economic construction, the development of modified asphalt varieties and production technology will be further promoted. The variety and preparation technology of modified bitumen depend on the type of modifier, the amount added and the composition and properties of the matrix bitumen (i.e. raw bitumen).
Due to the wide variety of modifiers and different forms, in order to form a uniform material that can be used for engineering and practical purposes with petroleum asphalt, various types of modifiers have been evaluated for many years, and the corresponding formulas and preparation methods have been developed, but most of the modified asphalt that has been applied to the project belongs to patented technology and patented products.
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Anonymous users2024-02-14Modified asphalt is an asphalt binder made by adding rubber, resin, polymer, ground rubber powder or other fillers and other external admixtures (modifiers), or taking measures such as light oxidation processing of asphalt to improve the properties of asphalt or asphalt mixture. There are two mechanisms of modified asphalt, one is to change the chemical composition of asphalt, and the other is to make the modifier evenly distributed in the asphalt to form a certain spatial network structure. Highway UseModern roads and roads have undergone many changes:
The traffic flow and driving frequency have increased sharply, the axle load of freight vehicles has been increasing, and one-way driving in separate lanes has been widely implemented, which requires further improvement of the anti-fluidity of the road surface, that is, the ability to resist rutting at high temperatures; Improve flexibility and elasticity, i.e. the ability to resist cracking at low temperatures; Improved wear resistance and extended service life.
Modern buildings generally use large-span prestressed roof panels, which require roofing waterproof materials to adapt to large displacement, be more resistant to harsh high and low temperature climatic conditions, have better durability, have self-adhesiveness, facilitate construction, and reduce maintenance workload.
These changes in the use environment pose a serious challenge to the performance of petroleum asphalt. The modification of petroleum asphalt to adapt to the above-mentioned harsh use requirements has attracted people's attention. After decades of research and development, a wide variety of modified road asphalt, waterproofing membranes and coatings have appeared, showing certain engineering practical effects.
However, in view of the fact that the modified material ** is usually 2 7 times higher than that of ordinary petroleum asphalt, users have not been able to fully grasp the engineering performance of the material, and the output of modified asphalt has grown slowly. At present, modified road asphalt is mainly used for pavement applications in special occasions such as airport runways, waterproof bridge decks, parking lots, sports fields, heavy traffic pavements, intersections and road bends. During this period, Europe applied modified asphalt to the maintenance and reinforcement of the road network, which greatly promoted the universal application of modified road asphalt.
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Anonymous users2024-02-13The main use of asphalt is as a basic construction material, raw material and fuel, and the application range is such as transportation (roads, railways, aviation, etc.), construction, agriculture, water conservancy engineering, industry (mining industry, manufacturing), civil and other sectors. Asphalt is widely used in the waterproofing treatment of paving roads and buildings, laying roofs, manufacturing linoleum, sleepers, anti-corrosion of electric poles, and waterproofing thin layers of steel pipes. Extra hard asphalt is also used as a filler for electrical insulation materials and rubber products.
Polymer modified asphalt can greatly improve the performance of asphalt pavement. Pavement paved with polymer-modified asphalt can significantly improve the resistance to permanent deformation, temperature shrinkage cracks and fatigue cracking. The use of modified asphalt and its mixture can effectively enhance the disease resistance of asphalt pavement, with good mechanical properties and service quality, it is not only used in the paving of high-grade highways, but also can be popularized and applied in other fields.
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Anonymous users2024-02-12Why is modified asphalt used in road construction? Modified asphalt is a kind of road building materials, which plays an important role in the construction of roads and other wastes. However, if you want to ask about the specific functions of modified bitumen, most people may not be able to articulate it clearly.
What is the role of modified asphalt in highway applications? The following is a brief analysis of highway applications.
Modified asphalt can make the pavement have good high temperature and low temperature resistance, and improve the elasticity, toughness and fatigue resistance of the pavement. It mainly has good strain ability on roads with large flow and heavy loads, which can reduce the permanent deformation of the road surface and greatly improve the rutting resistance. While greatly reducing the corrosive effect of vehicle light oil leakage on the road surface, the load and anti-skid capacity of the road surface are significantly improved.
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Anonymous users2024-02-11Modified asphalt mainly has the advantages of high temperature resistance, noise reduction, prolonging road service life, reducing pavement maintenance costs, anti-glare, waterproof fog and improving driving safety.
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Anonymous users2024-02-10It can reduce the energy consumption of the whole machine, move flexibly, be simple to install and debug, easy to maintain, and have strong environmental resistance
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Anonymous users2024-02-09First of all, the wax content of modified asphalt is much smaller than that of ordinary asphalt, and the adhesion between modified asphalt and mineral material is better, and secondly, the dynamic stability of the asphalt mixture produced with modified asphalt is much larger, and the relationship of about 1 times has the above two basic advantages, which is derived
With modified bitumen, it is possible to use acidic rock with high strength as a mineral mixture.
Asphalt pavement has few cracks and long pavement life The low-temperature crack resistance of modified asphalt is excellent.
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