Bitumen 60/70 could also be a specialist fuel grade, sometimes exclusively created in regarding sixty fifth of refineries around the world and with a yield of exclusively 3-4% of the total crude slate . bituminous crudes from the likes of oil countries tend to supply rather a lot of, but these would like a further specialised refinement technique, suggests that on the so much facet the aptitude of most ancient refineries.
the merchandise itself is feul, black and intensely sticky – so jam-packed with carbon that it cannot be used for combustion (unlike fuel, diesel and jet fuel). after all it's most carbon that unless it's unbroken heated to a temperature of regarding 100 fifty deg C, it solidifies into a rock-hard wax. so most bitumen 60/70 is loaded into road tankers nearly boiling purpose (for most viscosity) and this makes the duty of a bitumen tanker driver terribly risky - suppose full protective head and body-suits for all parts of the body.
Bitumen 60/70 has wonderful adhesive qualities provided the conditions unit favorable. however in presence of water the adhesion can turn out some problems. Most of the aggregates used in building possess a weak electrical phenomenon on the surface. The hydrocarbon combination bond is due to a weak dispersion force. Water is extraordinarily polar and thence it gets powerfully connected to the mixture displacing the hydrocarbon coating.
When temperatures unit raised, equally as once a load is applied to bitumen 60/70, it will flow, but will not come back to its original position once load is removed. This condition is alleged as plastic behavior. Applying a load implies that you just place a weight on the bitumen 60/70 therefore on subject it to fret. this may be throughout a quest science lab or at intervals the hydrocarbon final position at intervals the road and it's done to assess the hydrocarbon reaction to the load
BITUMEN IS ELASTIC:
When one takes a thread of bitumen 60/70 from a sample and stretches or elongates it, it is the power to return to a length preparing to its original length eventually. for a number of bitumen 60/70 this technique may take longer than others. This property is mentioned as a result of the elastic character of hydrocarbon.
Aging refers to changes at intervals the properties of bitumen 60/70 over time, that is caused by external condition. These changes unit of measure visible as cracks or crumbling areas. once hydrocarbon is exposed to 0.5 conditions, the bitumen 60/70 molecules react with gas, that finishes up in Associate in Nursing extraordinarily amendment of the structure and composition of the organic compound. This technique of mixing with gas, calledoxidation, causes the bitumen 60/70 to become brittle and arduous and to vary color from dark brown or black to gray. this modification is sometimes remarked as aerophilic hardening or age hardening. this kind of ageing happens further oftentimes in hotter condition or throughout heat seasons, inflicting older pavements to crack further just. The condition could in addition occur wherever the surface films of hydrocarbon unit of measure skinny, or if there has been inadequate compaction throughout construction.
BITUMEN IS VISCOELASTIC:
Bitumen 60/70 includes a elastic character. Its behavior could also be either viscous or elastic looking on the temperature or the load it's carrying. At higher temperatures there's a lot of flow or plastic behavior, whereas at lower temperatures and short length loading, the bitumen tends to be stiff and elastic. At intermediate temperatures it tends to be a mixture of the
Exposure to ultraviolet (UV) rays and therefore the evaporation of volatile compounds will cause bitumen 60/70 to harden. A volatile material could be a material that may modification in to a gas terribly quickly. There area unit 2 types of hardening:
Physical hardening happens once waxy crystals type within the bitumen structures, or once asphaltenes agglomerates clump along. This condition will be reversed if the temperature is raised.
supplying and delivery may be done through one in every of the below packaging methods:
Bulk Bitumen :Transportation of this type of bitumen is finished tho' Bulk vessels or tankers
Bitumen in Drum:Drum is one in every of the foremost applicable packaging variety of bitumen that area unit shipped into containers or Barges.
Poly Bag Bitumen:Poly bag is associate environmental packaging technology for numerous grades of bitumen that gives for finish users transferrable and additional use of product. Specification of 2 layers animal tissue films from polythene, that through soften operation resolution to bitumen and improve the standard.
Bitumen 60/70 MSDS has been prepared in accordance with EU regulation 453/2010/EC this information is given in righteousness, being supported the foremost recent information on the market to inventing product restricted. No known relevant information has been omitted from this Safety information Sheet and additionally the infomation provided is chosen to change the user to use the merchandise safely. The user should not assume, on the thought of the information provided throughout this sheet, that the merchandise is acceptable for any abnormal use. If the information provided is poor to verify safety in any specific application, contact Eagle Building product restricted for additional recommendation before the projected application is undertaken.
Bitumen 60/70 could be a normal penetration grade. bitumen sometimes used as a Paving Grade bitumen appropriate for road.
bitumen 60/70 sorts and Their Uses:
- Paving Grades - road surfacing, and a few industrial applications
- hard Grades - paints and enamels etc
- Oxidized/Blown Grades - roofing, waterproofing, electrical merchandise, and plenty of others
- reduction Bitumens - spraying and a few mixing applications
- bitumen Emulsions - used largely in road surfacing applications
- polymer changed Binders (PMBs) - there are different types and that they are often used for several of the applications mentioned above
Bitumen, dense, highly viscous, petroleum-based hydrocarbon that is found in deposits such as oil sands and pitch lakes (natural bitumen) or is obtained as a residue of the distillation of crude oil (refined bitumen). In some areas, particularly in the United States, bitumen is often called asphalt, though that name is almost universally used for the road-paving material made from a mixture of gravel, sand, and other fillers in a bituminous binder. Bitumen is also frequently called tar or pitch though, properly speaking, tar is a by-product of the carbonization of coal and pitch is actually obtained from the distillation of coal tar.
Bitumen is defined by the U.S. Geological Survey as an extra-heavy oil with an API gravity less than 10° and a viscosity greater than 10,000 centipoises. At the temperatures normally encountered in natural deposits, bitumen will not flow; in order to be moved through a pipe, it must be heated and, in some cases, diluted with a lighter oil. It owes its density and viscosity to its chemical composition mainly large hydrocarbon molecules known as
asphaltenes and resins, which are present in lighter oils but are highly concentrated in bitumen. In addition, bitumen frequently has a high content of metals, such as nickel and vanadium, and non-metallic inorganic elements, such as nitrogen, oxygen, and sulfur. Depending on the use to which bitumen is put, these elements may be contaminants that must be removed from the finished product. By far most refined bitumen is used in paving asphalt and roofing tiles, as is a large amount of natural bitumen. However, most of the bitumen extracted from Canada’s oil sands is upgraded into synthetic crude oil and sent to refineries for conversion into a full range of petroleum products, including gasoline.
Viscosity, resistance of a fluid (liquid or gas) to a change in shape, or movement of neighbouring portions relative to one another. Viscosity denotes opposition to flow. The reciprocal of the viscosity is called the fluidity, a measure of the ease of flow. Molasses, for example, has a greater viscosity than water. Because part of a fluid that is forced to move carries along to some extent adjacent parts, viscosity may be thought of as internal friction between the molecules; such friction opposes the development of velocity differences within a fluid. Viscosity is a major factor in determining the forces that must be overcome when fluids are used in lubrication and transported in pipelines. It controls the liquid flow in such processes as spraying, injection moulding, and surface coating.
For many fluids the tangential, or shearing, stress that causes flow is directly proportional to the rate of shear strain, or rate of deformation, that results. In other words, the shear stress divided by the rate of shear strain is constant for a given fluid at a fixed temperature. This constant is called the dynamic, or absolute, viscosity and often simply the viscosity. Fluids that behave in this way are called Newtonian fluids in honour of Sir Isaac Newton, who first formulated this mathematical description of viscosity.
Bitumen spray seal is the cost-effective and swift way to surface a road, car park or hardstand area when compared to asphalt, concrete.
A sprayed seal is a thin layer of bituminous binder sprayed onto a road surface and then covered with a layer of aggregate.
The aggregate is then embedded into the bitumen by rolling with a multi wheeled roller to form a durable waterproof, dust free and skid resistant surface. After rolling, the surplus loose aggregates are swept from the pavement and the surface is ready for traffic immediately thereafter.
The life of a sprayed seal will depend on various environmental and usage factors, but the useful life is typically between 7 to 15 years.
Spray seals are designed to meet the forecast traffic conditions for the road, with the number of coats of bitumen and aggregate increasing as the expected traffic volume increases.
Spray seal is also suitable for rejuvenating and extending the life of existing pavements.
Bitumen Sealing Services uses specially developed polymers, additives and primers to achieve greater adhesion and wearing performance between the aggregate, binders and substrate.