Manager Liu of coal asphalt manufacturer
Petroleum asphalt sheet is a kind of waterproof material widely used in construction, road, water conservancy and other projects, and its quality is directly related to the safety and service life of the project. Therefore, it is of great significance to understand the physical and chemical indexes of petroleum asphalt sheet for its production and application.
The main component of petroleum asphalt sheet is asphalt, which is processed from the heavy oil in petroleum. Asphalt has the characteristics of waterproof, moisture-proof, and anti-corrosion, so it is widely used in construction, roads, water conservancy and other projects. However, the properties of bitumen can be affected by a variety of factors, such as the quality of the raw oil, processing technology, storage time, etc. Therefore, in order to ensure the quality of petroleum asphalt sheets, it is necessary to strictly detect and control their physical and chemical indicators.
The physical and chemical indexes of petroleum asphalt sheet mainly include softening point, penetration, ductility, hardness, etc. The detection methods for these indicators are strictly regulated to ensure the accuracy and comparability of the results.
1.Softening point.
The softening point is an important index to measure the high temperature resistance of petroleum asphalt sheet. Asphalt sheets with low softening points tend to soften at high temperatures, causing the waterproofing layer to lose its waterproofing effect. Therefore, for construction, roads and other projects in high-temperature areas, asphalt sheets with high softening points need to be used.
2.Penetration.
Penetration is an indicator to measure the viscosity of petroleum asphalt sheet. The asphalt sheet with high penetration is thinner and easy to penetrate into the base layer, thereby enhancing the adhesion between the base layer and the waterproof layer. Therefore, for the project that needs to enhance the adhesion between the base layer and the waterproof layer, it is necessary to use asphalt sheets with a high degree of penetration.
3.Ductility.
Ductility is an index to measure the flexibility of petroleum asphalt sheet. The asphalt sheet with high ductility has good flexibility and can adapt to the deformation of the base layer, thereby enhancing the durability of the waterproof layer. Therefore, for projects that need to withstand large deformations, such as water conservancy projects, highways, etc., asphalt sheets with high ductility need to be used.
4.Hardness.
Hardness is an indicator that measures the hardness of petroleum asphalt sheets. The asphalt sheet with high hardness is not easy to deform and damage during construction and use, so it can enhance the durability and safety of the waterproof layer. However, asphalt sheets that are too hard may also affect their permeability and adhesion. Therefore, when choosing asphalt sheets, it is necessary to consider comprehensively according to the specific needs of the project.
In addition to the above four main physical and chemical indicators, the physical and chemical indicators of petroleum asphalt flakes also include many other contents, such as flash point, ignition point, density, etc. These indicators, while not as important as the first four, are also factors to consider for certain projects and uses. For example, flash point and ignition point can be used to measure the safety of petroleum asphalt sheets under specific conditions;Density can be used to calculate the weight and volume of asphalt sheets, among other things.
In short, for the physical and chemical indexes of petroleum asphalt sheet, it needs to be strictly controlled and tested to ensure that its quality and performance meet the requirements. At the same time, when selecting and using asphalt sheets, it is necessary to consider comprehensively according to the specific needs of the project to give full play to its advantages and potential.