Mechanical Properties of Foamed Concrete with Additional Pineapple Fiber and Polypropylene Fiber

Abstract

Foamed concrete is classified into lightweight concrete having a density range of 300-1,800 kg/m3. Foamed concrete is made by adding air bubbles into the concrete. The air bubbles can make affects decrease strength of concrete. To increase compressive strength and flexural strength can be added by pineapple fiber and polypropylene fiber that have high tensile strength. Percentage of pineapple fiber and polypropylene fiber used 0%, 0.2%, 0.4% of weight volume and with a pineapple fiber length 10 mm, 20 mm, 30 mm and 12 mm for polypropylene fibers. The maximum compressive strength was obtained in the mixture with a percentage of 0.4% fiber polypropylene fiber with a 12 mm fiber length of 8.38 MPa. The mimimum compressive strength is obtained in a mixture of 0% fiber. The maximum flexural strength is obtained in the mixture with a percentage of 0.4% fiber of polypropylene fiber with a 12 mm fiber length of 3.23 MPa. The minimum flexural strength is obtained in the mixture of 0% fiber. The result of this research showed that there was an increase of compressive strength and flexural strength of foamed concrete with added by pineapple fibers and polypropylene fibers.