A group of scientists headed by the professor V.V. Mozgovoy found out that replacement of steel reinforcing mesh to composite rebar in road paving improves performance and reduces the cost of materials for road construction.
These findings were obtained during the evaluation of asphalt concrete pavement performance. The data have demonstrated that one of the major problems in highways operation is forming the ruts. It was decided to use composite polymer rebar produced by Izhevsk LLC “KomAR” on the experimental sections of the road in the city of Perm. As a result, when 7 years of operation passed, the pavement in these sections didn’t require repair (road surface guarantee life is 5 years).
In 2012, composite rebar was utilized as reinforcing mesh between asphalt layers on the 55th kilometer of M7 road, called Volga. Checking the surface quality showed that ruts appeared at this road section less than half conventional asphalt paving.
To provide necessary physical and technical characteristics, GOST 31938 “Fiber-reinforced polymer bar” was developed. According to this GOST, basalt composite rebar must meet the following requirements:
Tensile strength – at least 800 MPa
Tensile strength at a cross section – at least 150 MPa.
Find, please, more information about indicators for different types of composite reinforcing elements here (in Russian).
Terms: Composite materials