What are the main technical properties of petroleum asphalt, respectively, with what indicators to express

The technical properties of petroleum asphalt mainly has the following:

(a) viscosity Viscosity, also known as viscous, is the asphalt in the action of external forces to resist deformation. Expressed in terms of viscosity.

The main method of determining the relative viscosity of asphalt is to use the standard viscometer method and the needle penetration method The smaller the needle penetration, indicating that the greater the viscosity

(ii) ductility

Ductility refers to the deformation of asphalt under the action of an external force without damage (cracks or breaks), remove the external force is still maintained in its original shape unchanged properties.

(C) temperature-sensitive

Temperature-sensitive refers to the asphalt viscosity and plasticity with the temperature change performance.

(1) high-temperature inductance with the softening point expressed in ℃

The higher the softening point, indicating that the asphalt is more heat-resistant, that is, the better the temperature stability.

Needle penetration, ductility, softening point is the evaluation of viscous petroleum asphalt road performance of the most commonly used empirical indicators, so commonly referred to as the "three major indicators"

(2) low-temperature cracking resistance with the brittle point

Brittle point is the asphalt material from the viscous-plastic state into a solid state to achieve the conditions of the brittle cracking temperature.

In practice, asphalt is required to have a high softening point and low brittle point, or the asphalt material is prone to summer flow or winter brittle or even cracking and other phenomena.

(D) heating stability

(E) safety

Flash point (flash point) is the heating of asphalt volatile combustible gases and air composed of a mixture of gases in the specified conditions and or contact, resulting in a flash of asphalt temperature.

Flash point is in contact with fire can continue to burn more than 5s when the asphalt temperature.

(F) solubility

The solubility of asphalt is the percentage of petroleum asphalt dissolved in trichloroethylene

(VII) water content

(VIII) asphalt non-conventional and other properties

1, needle penetration index

2, modulus of strength

3, adhesion

4, aging