Improving the efficiency of bitumen using additives
Non-parametric performance is important in determining the asphalt performance. The use of thermoplastic polymers with additives such as sulfur and bitumen resistance to breakage can be strengthened. Bitumen additives known as promoters and enhancers main role of bitumen in the bitumen increased resistance against permanent deformation at high temperatures. Asphalt modifiers, should be chosen in a way that does not have a negative effect on the properties of bitumen in different temperatures. If the elastic and viscous bitumen consists of two parts consider increasing elastic component bitumen, a viscous component is reduced, and this will increase the dynamic stiffness pitch. Bitumen additives have been effective, economically and executive is acceptable, readily available and can be blended with bitumen.
In addition, this is a bitumen additive during storage, use and service conditions for physically and chemically stable.
The use of sulfur as an additive bitumen, the amount of 2 to 3 percent of sulfur improves the efficiency of bitumen at high temperatures, the addition of sulfur used for communication between bitumen and polymer additives. The use of sulfur as an additive it causes the release H2S gas at temperatures above 150 ° C, and this will cause problems.
Bitumen produced color:
Using substances called colored pigment can be produced it and most colorful it by adding iron oxide pigments are produced. To obtain colored asphalt requires one to two percent of pigment and usually only acceptable color that can be obtained is red. For bitumen road must be 5% or more acceptable red iron oxide to ensure that this amount is high and increasing costs.