Generally speaking, SBS modification of bitumen requires three processes: swelling, shearing (or grinding), and development.
For the SBS modified bitumen system, there is a close relationship between swelling and compatibility. The size of the swelling directly affects the compatibility. If SBS swells infinitely in the bitumen, the system becomes completely compatible. The swelling behavior is closely related to the production, processing technology and high-temperature storage stability of modified bitumen. As the temperature increases, the swelling rate accelerates significantly, and the swelling is obvious at the melt processing temperature higher than the glass transition temperature of PS of SBS. In addition, the structure of SBS has a significant impact on the swelling behavior: the swelling speed of star-shaped SBS is slower than that of linear SBS. Relevant calculations show that the density of SBS swelling components is concentrated between 0.97 and 1.01g/cm3, which is close to the density of aromatic phenols.

SBS modified asphalt uses base asphalt as raw material, adds a certain proportion of SBS modifier, and uses shearing, stirring and other methods to evenly disperse SBS in the asphalt. At the same time, a certain proportion of exclusive stabilizer is added to form an SBS blend. material, using the good physical properties of SBS to modify asphalt.
The use of modifiers to modify asphalt has a long history internationally. In the mid-19th century, the vulcanization method was used to reduce the penetration of asphalt and increase the softening point. The development of modified asphalt in the past 50 years has roughly gone through four stages.

Modified asphalt is to add external admixtures (modifiers) such as rubber, resin, high molecular polymers, finely ground rubber powder or other fillers, or take measures such as mild oxidation processing of the asphalt to make the asphalt or asphalt mixture The performance of the asphalt binder can be improved.

Many users who use emulsified asphalt do not understand why emulsified asphalt needs to be demulsified, nor what its use is. Therefore, the editor of emulsified asphalt manufacturer Sinoroader would like to take this opportunity to explain in detail the relevant knowledge of emulsified asphalt demulsification.

As we all know, micro-surfacing and slurry sealing are both relatively common preventive maintenance techniques, and the manual methods are also similar, so many people don’t know how to distinguish them in actual use, so the editor of Sinoroader would like to take this opportunity Let me tell you the difference between the two.

Asphalt is a highly viscous organic liquid with a black surface and is soluble in carbon disulfide (a golden-yellow, foul-smelling liquid). They often exist in the form of asphalt or tar.
Asphalt can be mainly divided into three types: coal tar pitch, petroleum asphalt and natural asphalt: among them, coal tar pitch is a by-product of coking. Petroleum asphalt is the residue after distillation of crude oil. Natural asphalt is stored underground, and some form mineral deposits or accumulate on the surface of the earth's crust.