In recent years, Sika has expanded its presence in the fast-growing concrete reinforcing fiber market. Most recently, during 2018, the company acquired Fibermesh®, the fiber technology developed by the US company Propex.
Just five percent of installed concrete contains fibers. Experts anticipate that concrete reinforcing fibers will usher in the same magnitude of progress in construction as admixtures have since their introduction to the market.
Studies have shown that adding fibers to concrete increases flexural strength 2.5-fold. Fibers also provide improved corrosion protection, fire resistance, and extend service life.
Because of its greater efficiency, fiberreinforced concrete is set to grow at an estimated average of 7.2 percent a year in the period between 2015 and 2020. The advantages of using fibers include a reduced site workload because less rebar needs to be used.
Conventional Concrete Reinforced with Rebars versus Fiber-Reinforced Concrete
Fiber-reinforced concrete has a greater tensile strength. Furthermore, the fibers make the concrete more impact-resistant.
Fibers provide protection in a fire. For example, temperatures in a tunnel fire can exceed 1,000 degrees Celsius. Under these circumstances conventional concrete will spall, which reduces its load capacity. Fibers hold the concrete together.