150 / 2022-04-29 15:34:13

Study on mechanical properties of recycled GFRP reinforced concrete

concrete,GFRP waste recycling,mechanical property,mechanical recycling

Glass fiber reinforced polymer (GFRP) materials are widely used in construction, transportation, aerospace and other industries due to their superior characteristics in terms of light weight, respectable mechanical performance, possibility of production in any shape and corrosion resistance. However, due to its increasing output and the difficulty of recycling of thermosetting resin, how to dispose of GFRP waste has become a major problem in the industry.



The traditional recycling methods of GFRP are mainly landfill and incineration, but these methods are gradually being banned in many countries because of their environmental pollution. For thermosetting composites, mechanical recycling is the only commercially available recycling process. This method involves a series of operations, including cutting, crushing and grinding, that in turn reduce the size of the recycled material.



Concrete is widely used in civil engineering and other industries. However, due to its low flexural strength and tensile strength, the application of concrete in many fields is limited. Adding GFRP waste powder or fiber to concrete is a good option. This method can not only reduce the need for landfill waste and extracting natural aggregate from quarries, but also maintain acceptable and sometimes even better concrete quality.



In this paper, GFRP waste powder were obtained by mechanical recycling, and the feasibility of GFRP waste reinforced concrete is studied. The physical and chemical characterization of GFRP waste was carried out. GFRP waste powder was used to replace 0%, 5%, 10% and 15% fine aggregate to prepare concrete. The mechanical properties of GFRP waste reinforced concrete were studied, and the possible alkali-aggregate reaction in concrete was tested. The experimental results indicate that it seems feasible to incorporate low proportions and reuse GFRP fine waste in concrete, the recycled GFRP reinforced concrete is technically feasible and economically attractive.