Study of Fly Ash Plastic (FAPET) as an alternative for lightweight aggregate in concrete K A Sambowo, F Apriyanto, Prihantono, R A Sumarsono
State University of Jakarta
Abstract
Plastic waste is identified as non-biodegradable material that is harmful to the environment. Polyethylene terephthalate (PET) is one of the most well-known types of plastic that is used for food packaging. This can usually found in huge amounts as plastic waste. This paper takes advantage of PET plastic waste from the water drinking cup to be blended with fly ash to produce a lightweight aggregate called FAPET. All properties of FAPET were significantly better than pumice which is used as the control sample during the experiment, i.e. 0.5% for water absorption is 0.5% better, 0.5% for compressive strength, and 0.5% for abrasion value of 28.55% respectively. FAPET was derived from the double blending process of PET with fly ash in which the composition of PET and fly ash was 1:3. The experiment was conducted partially until the full replacement of pumice as a lightweight aggregate with FAPET to establish waste-based lightweight concrete. The modulus of elasticity and compressive strength resulted from 100% replacement using FAPET were 31,706 MPa and 23,64 MPa that is equal to a normal concrete strength. The utilization of FAPET is concluded to be successful as an alternative lightweight aggregate for structural use of lightweight concrete.
Keywords: Fly Ash, PET Plastic, FAPET, lightweight aggregate, lightweight concrete
