Mechanical Properties of Mortar Incorporating Waste Materials from Glass Fiber-Reinforced Polymer Manufacturing

Abstract

Glass fiber reinforced polymer (GFRP) is a material that can replace steel bars in the construction of infrastructure, which cannot be recycled. This research studies the method of disposing of waste materials from the manufacturing process and structures that use glass fiber-reinforced polymer rods to replace steel reinforcement in concrete by using mechanical recycling and sorting by screening the materials into powder form recycled glass fiber reinforced polymer and glass fiber. This research divides the tests into compressive strength, tensile strength, and drying shrinkage, focusing on determining the ratio of strength to recycled material amount, the ratio of superplasticizer to recycled material amount, and shrinkage behavior of mortar, using the same mixing ratio of recycled powder and glass fiber in all tests. Mortar mixed with recycled powder replaced sand by weight in amounts of 5, 10, 20, 25, 30, and 35 percent. Mortar mixed with glass fiber The total weight of recycled powder mortar was added in the amount of 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, and 3.5 percent. The compressive strength, tensile strength, and flexural strength tests were tested at the ages of 3, 7, and 28 days, and the dry shrinkage tests were tested at the ages of 1, 2, 3, 4, 5, 6, 7, and 28 days. The results showed that the overall strength of the mortar mixed with recycled powder increased with the amount of recycled powder used and it helped reduce the shrinkage of the mortar. For the mortar mixed with glass fiber, the strength results were variable, which is expected to be due to the uneven arrangement and distribution of the fibers in the mortar.