Bitumen is a visco elastic material. that is at room temperature it act as a semi solid. in high temperatures over 60C it acts as a Newtonian fluid or low viscosity liquid. Penetration and viscosity are the main two properties checked to categories bitumen. on the other hand flash point,fire point,solubility, ductility and softening point of the bitumen are also checked.
The exact make-up of a road will depend on several variable factors such as the weight and volume of traffic it has been designed to carry, local climatic conditions and the availability of mineral aggregates. In most cases, bitumen will be needed for its properties of waterproofing and durability and as the cheapest adhesive generally available. A minor secondary road may use bitumen only for its top two courses, at the rate of 7 tonnes per kilometre. A highway engineer may call for three asphalt courses, with tack coats in between, because of asphalt's superior load bearing properties. In this case, bitumen consumption can amount to 1,000 tonnes per kilometre. The bitumen percentage in asphalt is usually between 4-8%.
The density(sp. Gravity) of Bitumen Grade 60/70 has Near about 1.01-1.08 gm/cc. and the final value will conform after Testing.
Pitch is a bitumen or it can mean the slope of the roof for example 1/8" per foot fall
The properties
The answer will depend on the properties of what!
Read the standard EN 12591 Bitumen and bituminous binders - Specifications for paving grade bitumens.
See: Properties of Oil Sands and Bitumen in Athabasca 2006 Fig 7 http://www.cspg.org/conventions/abstracts/2006abstracts/135S0131.pdf
Bitumen whose rhelogical properties have been modified by reaction with air at elevated temperatures. This material is referred to as blown bitumen Oxidised while Air rectified bitumens are used in paving applications as well as roofing applications for some industrial applications.For more info: http://www.roadstarbitumen.com
Evert Alan Mulder has written: 'Interfacial properties of bitumen emulsions'
Bitumen is not reactive in the sense that it sets. Furthermore, it's strongly temperature sensitive ie the apperance will depend on temperature. This is perhaps one of the main properties of bitumen, along with stickiness. If its fluid (or thick) n room temperature it will stay that way. There are slow processes, chemical and physical, that will affect properties but these are slow and long term. If you want it to set, lower the temperature or choose another quality of bitumen. There are bitumens that more or less brittle at room temperature.
why bitumen is used
Mustek manufactures a variety of packed bitumen products. Their bitumen products are produced at the Europoort refinery in Rotterdam, Germany. They produce 3 types of bitumen: penetration bitumen,oxidized bitumen, and hard bitumen.
Bitumen has not thorium.
Bitumen is use as fuel.
Petroleum bitumen is often confused with tar. Although bitumen and coal tar are similarly black and sticky, they are distinctly different substances in origin, chemical composition and in their properties. Coal tar is produced by heating coal to extremely high temperatures and is a by-product of gas and coke production. It was widely used as the binding agent in road asphalt in the early part of the last century, but has since been replaced by refined bitumen.
Bitumen Bi*tu"men
The exact make-up of a road will depend on several variable factors such as the weight and volume of traffic it has been designed to carry, local climatic conditions and the availability of mineral aggregates. In most cases, bitumen will be needed for its properties of waterproofing and durability and as the cheapest adhesive generally available. A minor secondary road may use bitumen only for its top two courses, at the rate of 7 tonnes per kilometre. A highway engineer may call for three asphalt courses, with tack coats in between, because of asphalt's superior load bearing properties. In this case, bitumen consumption can amount to 1,000 tonnes per kilometre. The bitumen percentage in asphalt is usually between 4-8%.