What effect has the increasing road construction and repair activities caused on the bitumen market? Will the growing construction activities propel the growth of the market? But that’s not all. Read along to get interesting insights!!!
Bituminous materials or asphalts are extensively used for roadway construction, primarily because of their excellent binding characteristics and water proofing properties and relatively low cost. Bituminous materials consists of bitumen which is a black or dark colored solid or a viscous cementitious substance which consists chiefly of high molecular weight hydrocarbons derived from distillation of petroleum or natural asphalt. Bituminous materials adhesive properties are what make them useful in a number of applications.
What are different forms of bitumen????
– Cutback Bitumen: Normally heat is used to reduce the viscosity of bitumen, while in cutback bitumen this is done by using a suitable solvent.
– Bitumen Emulsion: Bitumen emulsion is a liquid product in which bitumen is suspended in a finely divided condition in an aqueous medium and stabilized by suitable material.
– Modified Bitumen: Certain additives or blend of additives called as bitumen modifiers can improve properties of Bitumen and bituminous mixes. Bitumen treated with these modifiers is known as modified bitumen.
What are some of the advantages of using bitumen???
Lower susceptibility to daily and seasonal temperature variations
Higher resistance to deformation at high pavement temperature
Better age resistance properties
Higher fatigue life for mixes
Better adhesion between aggregates and binder
A report by Mordor Intelligence, a market research firm estimates a moderate growth rate for global bitumen market.
Bitumen is the residue or by-product when the crude petroleum is refined. A wide variety of refinery processes, such as the straight distillation process, solvent extraction process etc. may be used to produce bitumen of different consistency and other desirable properties. Bitumen based parings and roofings are subject to water runoff from rainfalls. Moreover bitumen is sometimes used to line water reservoirs. Bitumen is also used to line and cap hazardous waste sites –preventing rain water from permeating through the hazardous waste and from leaching into ground water.
Heavy metal contamination of highway runoff water and roadside soils has been reported. However, further research has shown that pollutants in runoff from bitumen pavements emanate from vehicles that use the pavements, not from asphalt pavements themselves
The main hurdles for bitumen market are; increasing environmental concerns all across the world and the volatile crude oil prices. These are the major two factors that are restraining the growth of the market
Way ahead: Many research articles have been suggesting the use of lignin as a replacement for bitumen. The replacement will make the construction of roads much greener. The product is derived from plants and is chemically quite similar to bitumen.