The use and physical and chemical indexes of modified asphalt
Modified asphalt is a processed asphalt material, which is widely used in construction, roads, chemical industry and other fields due to its excellent physical and chemical properties and a wide range of application fields. This article will introduce the uses and physical and chemical indicators of modified asphalt in detail.
First, the use of modified asphalt.
1.Architectural field.
In the field of construction, modified asphalt is widely used in waterproofing, anti-corrosion, thermal insulation, etc. Due to its excellent waterproof performance and anti-corrosion performance, it is widely used as a waterproof layer on the roof, basement, and toilet of buildings. At the same time, modified asphalt is also used in the manufacture of waterproof materials and insulation materials, such as SBS waterproofing membrane, asphalt waterproof coating, etc.
2.Road field.
In the road sector, modified asphalt is widely used in pavement paving and repair. Due to its excellent durability and anti-skid properties, it is widely used in the laying and repair of highways, urban roads, airport runways and other roads. At the same time, modified asphalt is also used to make materials such as road asphalt concrete and asphalt mortar.
3.Chemical industry.
In the chemical industry, modified asphalt is widely used in the production of lubricating oils, greases and other lubricant products. Because of its excellent lubricating properties and oxidation resistance, it is widely used in mechanical lubrication, metal processing, chemical production and other fields. At the same time, modified asphalt is also used in the production of fuel oil, asphalt coatings and other products.
Second, the physical and chemical indexes of modified asphalt.
1.Appearance and color.
The modified asphalt should be black or dark brown, and the surface should be smooth and shiny, free of impurities and bubbles. The shade of color may vary depending on the production process and raw materials.
2.Density and viscosity.
The density of modified asphalt is generally 101～1.06 g cm3, its viscosity is larger, and it has high adhesion and adhesion.
3.Softening point and penetration.
The softening point of modified asphalt is higher, generally above 80, and its penetration degree is low, generally between 20 and 40. The softening point and penetration degree are important indicators to measure the high-temperature stability and low-temperature crack resistance of the modified asphalt.
4.Flash point and ignition point.
The flash point of modified asphalt is generally higher than 230, and the ignition point is higher than 300. It has high safety performance and is not easy to burn and **.
5.Residual carbon and ash.
The carbon residue of modified asphalt is generally less than 20%, and the ash content is low, generally not more than 01%。These indicators reflect the combustion performance and purity of modified asphalt.
6.Moisture and volatiles.
The moisture content of modified asphalt is low, generally less than 1%, and the volatile content is also low, generally not more than 5%. These indicators reflect the purity and drying properties of modified bitumen.
7.Sulfate and chloride content.
The sulfate content of modified asphalt is generally low, not exceeding 05%, the chloride salt content is also low, generally not more than 01%。These indicators reflect the chemical composition and purity of modified asphalt.
To sum up, modified asphalt has a wide range of application fields and excellent physical and chemical properties, its uses include construction, roads, chemical industry and other fields, physical and chemical indicators include appearance, density, viscosity, softening point, penetration, flash point, ignition point, residual carbon content, ash, moisture, volatiles, sulfate and chloride salt content, etc. Understanding the uses and physicochemical indicators of modified asphalt can help to better understand its performance and application range.