Bayndrhay dissolution of bitumen in oil derivatives One reason for damage to asphalt used on runways, fuel stations, many parking lots and industrial plants and places where there is the possibility of fuel leakage.
Polyurethane, polyether-polyester copolymers, olefin copolymers and styrenic block copolymers are thermoplastic elastomers four groups of which have proved to have the greatest potential for blending with bitumen. Thermoplastic rubber or thermoplastic elastomers styrenic block copolymers is well known that continuous polymerization styrene-Bvtady may Sequencing by N-styrene (SBS) or styrene-isoprene-styrene (SIS) to be produced. Alternatively, a precursor two consecutive polymerization of styrene and monomer block can be by the middle block with bonding agents produced by reaction. So in addition to linear copolymers, multi-arm copolymers are produced. As a branch or radial copolymer known
Various petroleum products with specific gravity different pitch. Materials that have a lower specific gravity are lower boiling point thus one of the first applications of this parameter has been using it for the distillation of crude oil.is considered as one of the important parameters to measure the quality and quantity of petroleum products. The specific gravity of applications including petroleum products are as follows:
Stiffness and creep behavior of a single road binder should ideally be served at all temperatures. Multigrade bitumen created for this purpose and influence of the bitumen less sensitive to temperature.
What is ultraviolet radiation impact on the effectiveness of bitumen?
Bitumen in the environment is comfortable with aging. Bitumen aging due to UV radiation and temperature are two different types of aging. Aging alters the efficiency of the pitch. Research has shown that sensitivity to temperature and UV pitch is different. And some penetration, softening point and tensile Bitumen bitumen-old Pyrshdh the effect of ultraviolet radiation on thermal effects is different. And destruction of properties of bitumen at lower temperatures related to the effects of ultraviolet radiation. There is aromatic resin and the bitumen is necessary to create anti-UV.
Wax and its impact on bitumen properties mean?
The English word wax was originally applied to the hair. Now the word wax application more general, such as waxes own again, and for solids, liquids that are found in nature as well as compounds that are found in the material properties such as hydrocarbon wax used to be. As well as synthetic materials that in principle, but has physical properties such as wax wax is placed in this category. In fact, the wax is insoluble in water, hardly dissolve in alcohol and if the mixture is heated with oil.
The penetration index bitumen
Bitumen heat sensitivity can be calculated in different ways. One method is to calculate the heat sensitivity index bitumen tar permeability (Penetration index, PI) that is obtained from the following equations:
Colored bitumen or tar colored emulsion paint for roads, airport runways, asphalt colored camouflage military buildings and construction applications. Colored emulsion bitumen contains less than 25 wt% bitumen with colored pigments and materials are insoluble. Insoluble materials available to the stability of emulsions and pigments in emulsion stability especially helps.
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CRMB: Crumb Rubber Modified Bitumen
CRM is a mixture of bitumen and modified bitumen rubber is intrusive. The viscosity modifier rubber used asphalt binder and temperature resistance as well as resistance against brittle at low temperatures increases. CRMB has good adhesion to mineral mass, and thereby reduce brittleness and deformity.
The advantages of CRMB: