Emulsified Asphalt in Road Maintenance
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Here discusses the application of emulsified asphalt pavement and developments illustrate the production of the emulsion, the emulsion formulations, emulsions and emulsions in various spreading in the application.
1、Emulsified asphalt Emulsified asphalt is composed of two immiscible material - a mixture of bitumen and water. The emulsion particle size is a more important parameter since the particle size becomes single, dispersion, emulsion viscosity will be better, and bond breaking performance is more suitable. However, this also limits the bitumen content of the emulsion, which affect the speed of curing, in general, when the particle diameter was found by VSS has the best overall characteristics in a range of 1 ~ 5μm. Composition and chemical properties of bitumen are complex. With high polarity (polarizing) and higher aromatic asphalt, generally easier to emulsify. Additives can be used to improve emulsification, in general, a high penetration bitumen emulsion easier than the low penetration of asphalt. Emulsified asphalt chemical dispensing choice depends on road conditions, both the anionic emulsifiers and cationic emulsifiers are dependent on the salt of a long chain hydrocarbons, which may be a synthetic oil fatty acids found in organisms turn, more fatty acid or a mixture of wood pulp lignin. Emulsions are generally used to control the content through the device and formulation. Using a suitable emulsifier, an emulsion formulation emulsifier correct control effect,is very important for the production of the emulsion. 2, Advantages and economy of emulsified asphalt 2.1 energy conservation Kerosene or gasoline content to dilute the bitumen can reach at 50%, while emulsified asphalt only containing 0 to 2%. So, this is a great savings value behavior on white fuel production and utilization, only rely on increase of light oil solvent to reduce the viscosity of standard asphalt, bitumen can be watered and spreading, and hope light oil after use can volatilizate into the atmosphere. In fact, if the light oil can be non-volatile, so it is too soft for asphalt in traffic load, road surface may deform or weeping. Now with the same solid emulsions and light oil were compared, the results are as follows: Processing 1L paving with asphalt cutback takes about energy 700KJ, coupled with increased energy and other cutting devices, namely 40000KJ / L, this light 1L60% bitumen emulsion production facilities throughout the energy requirements are:700+4.4x40000=16700（KN）.Emulsified Asphalt: 1L emulsified asphalt production requires energy 576KJ, 1L production of emulsified asphalt emulsifier provided energy 584KJ, so emulsified asphalt production 1L total energy 1160KJ. It can be seen, most of the energy is consumed by the fuel. 2.2 Versatility There are many kinds of emulsified asphalt application methods to select the appropriate set method applied, because they have a very wide range of applications. Also provided both to make an emulsion seal coat withdraw a large area of cloth, it can also be used to set up small-scale pit repair work. Because they can be long-term storage in the tank, when used in remote areas, the use of roller spraying application is very easy. 2.3 Easy to use Lotion dispenser requires specialized equipment set up, such as a spreader. However, small area can be directly watering by hand and hand spreading, such as a small area of pothole pacther working pits, cracks sealing etc.. Small amount of cold mix mixture just need the basic equipment on the line. For example, a shovel and a watering with a baffle can achieve a small area of the sealing layer and crack repair, pothole repair method using poured-type applications such as filling potholes simple. 3、Conservation methods and uses of emulsion In the SHRP program, the United States and Canada have provided pavement preventive maintenance program were tested, results were better. Longer duration is provided a method of slurry seal conservation, stone chips and poured overcoat formula potholes repair methods. Related Sites: [url=http://roadroutercrack.com/blog-new/1528.html]energy efficient used plate compactor for sale price[/url] [url=http://roadcuttingmachine.com/blog/815.html]foamed asphalt machine practical explanation[/url] [url=http://roadcuttingmachine.com/blog/2264.html]Concrete Roads Factory Direct Thermal Spray Gun[/url] [url=http://roadcuttingmachine.com/blog/6209.html]Cheap Mining And Road Machinery Parts[/url] |
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