Bitumen in century
Bitumen in century
The Sumerians, Assyrians and many of the early civilizations of bitumen widely used. Waterproof material from this material as well as covers for the Wood and items such as balm, sculpture and decorative use.
The Sumerians, Assyrians and many of the early civilizations of bitumen widely used. Waterproof material from this material as well as covers for the Wood and items such as balm, sculpture and decorative use.
The failure of asphalt and because it has repeatedly raised by experts not once but many times, the media have repeatedly said and wrote it, but the result did not change. Indeed, what's the problem?
MATERIAL SAFETY DATA SHEET for ASPHALT (unhardened and hardened asphalt)
Bitumen in different ways to market supplied. In the case of domestic destinations and large volumes of bitumen tankers used, but for lower consumption or track and quite a long time depending on the category barrels of bitumen packaging, Polybag, B2bag or carton is used. In the case of penetration bitumen barrels or poly bag packaging or container is used. In the case of blown bitumen or hard of carton packaging is used. Transportation of bitumen modified with polymers such as family SBS, the first polymer mixed with the appropriate polymer and bitumen production. Then, using the concept that heat more easily penetrate the package tar in small pieces of 3-2 kg are provided with a polyethylene coating. After cooling, these blocks are very simple to carry tar that is, they are placed in larger packages Services and trucks Tops by simply warehousing, storage and transportation are taking place. In place of these parts is poured into the tank of molten bitumen with or without agitator and simply melted and consumed.
The use of bitumen in road construction for the production of asphalt and concrete mixtures and asphalt is one of the components of a plan. Over the past few years increasing the price of bitumen and accrued profits on some of the opportunists led to her hand and non-standard it is produced by various methods. Unfortunately, the use of this type of pitch is common in some projects.
OPEC aims to unify and coordinate the petroleum policies of member states was formed.
OPEC (opec) English acronym of the Petroleum Exporting Countries (Organization of petroleum Exporting Counteries) at the conference that during days 10 to 14 September 1960 in Baghdad attended by representatives of Iran, Iraq, Kuwait, Saudi Arabia and Venezuela was held on the basis of It was placed.
In Iran since ancient times are unknown and it was used for building insulation. Physical pitch black, brown and viscous colloidal mixture of the hydrocarbons that have been formed. Family mainly include coal tar and bitumen, tar and bitumen residues are mineral and oil. Some of the hydrocarbon bitumen, sulfur, oxygen and nitrogen are.
Black asphalt material, semi-solid or viscous and very sticky. Asphalt mix material is made by mixing sand and bitumen, and the construction of roads, runways and buildings used for the roof.
Asphalt types:
Asphalt with regard to the use and incorporation of the three categories of hot asphalt, bitumen and asphalt division is protective.
Sticky bitumen emulsions are cold. Therefore, using them risks warehouse and distribution costs can be avoided in hot conditions. But that's fine layer aggregates create the appearance of breaking the water (emulsion), which should be done well disposed to compaction. If the film
Thin water disposal is done easily.
Spherical particles of bitumen emulsions is the evaporation of water buildup. As a result of an increase in tensile forces on the molecular electrostatic repulsion is overcome and binder particles are linked together to form a continuous mass. This phenomenon is called to break emulsification. Breaking the emulsion may be caused by contact with aggregate. Contact aggregate with the complex phenomenon of surface ionization and often mixtures of bitumen and aggregate to form insoluble particles of cement, aggregate and bitumen act, create better road use. In the cationic emulsions Each condition is independent of the type of stone aggregate bond component provides bitumen to be used. Bitumen emulsion is obtained shall not transport in tanks and not in the end be broken. However, when the emulsion is on the way broadcast advertising should immediately break and the bitumen is removed from the aqueous solution and form a thin film cover materials. The first sign of breaking the emulsion changes its color from chocolate brown to black tar that is swept away materials. At this stage, did not pitch without water and still has not achieved its full power.