The Compressive Strength Of Fly Ash Foamed Concrete With Polypropylene Fiber

Abstract

Lightweight concrete is widely used for various structural applications because its lighter than normal concrete. Foamed concrete is made to produce low-density concrete by introducing air bubbles or foam into it. In the presence of air bubbles, the density of concrete only reaches 300-1700 kg/m³ [1]. The addition of fly ash can reduce the pores that cause the entry of acids. In addition, the modulus of elasticity in the polypropylene fiber mixture prevents cracked so it can make foamed concrete more ductile than foamed concrete without fibers and can make concrete stronger. The manufacture of foamed concrete specimens was planned by the SNI Module 3 specifications [4] and was equipped with ASTM [2], [3]. The foaming agent content in foamed concrete was 0.8 % where the polypropylene fiber variations are 0 %, 0.15 %, 0.2 %, and 0.3 % with 25 % fly ash as a cement substitute. The compressive strength test results show that the addition of fibers to foamed concrete increases the compressive strength of concrete where the maximum compressive strength produced by foamed concrete with polypropylene fibers is 0.3% and the lowest compressive strength is produced by foamed concrete without fibers.