Steel fibre-reinforced shotcrete (SFRS) is

shotcrete Shotcrete, gunite (), or sprayed concrete is concrete or mortar conveyed through a hose and pneumatically projected at high velocity onto a surface, as a construction technique, first used in 1907 invented by Carl Akeley. It is typically r ...

(spray concrete) with steel fibres added. It has higher

tensile strength Ultimate tensile strength (UTS), often shortened to tensile strength (TS), ultimate strength, or F_\text within equations, is the maximum stress that a material can withstand while being stretched or pulled before breaking. In brittle materials t ...

than unreinforced shotcrete and is quicker to apply than

weldmesh Welded wire mesh, or welded wire fabric, or "weldmesh" is an electric fusion welded prefabricated joined grid consisting of a series of parallel longitudinal wires with accurate spacing welded to cross wires at the required spacing. Machines are ...

reinforcement. It has often been used for tunnels.

Advantages

The primary advantages of fibre-reinforced shotcrete are: * Addition of steel fibers into the concrete improves the crack resistance (or ductility) capacity of the concrete. Traditional rebars are generally used to improve the tensile strength of the concrete in a particular direction, whereas steel fibers are useful for multidirectional reinforcement. This is one of the reasons why steel fiber reinforced (shotcrete form) concrete successfully replaced weldmesh in lining tunnels. * Less labour is required. * Less construction time is required.

Applications and types

SFRS has various types, which are applicable to differing situations. Primary uses are: * Tunnels – uses short steel fibers * Industrial floorings – uses long steel fibers

References

{{Authority control Building materials Concrete Fibre-reinforced cementitious materials

Advantages

Applications and types

See also

References