ANALISIS SIFAT FISIK DAN MEKANIK GEOPOLYMER FOAM CONCRETE DENGAN VARIASI RASIO FOAMING AGENT DAN AIR

Abstract

Geopolymer is the synthesis of inorganic natural materials through a polymerization process. The main
ingredients in the manufacture of geopolymers are materials containing silica and alumina. Geopolymer
material can be obtained from coal industry waste products such as fly ash. Innovative technology in
manufacturing foam concrete is widely used in building construction, such as using earthquake-resistant
building walls and energy-efficient buildings. In this study, geopolymer foam concrete was manufactured
by combining a mixture of geopolymer and a mixture of foam. A solution of 14 M NaOH and Na2SiO3
with a ratio of 2.5 was used as an activator. Fly ash is a precursor, and the ratio of foaming agent and
water is 1:20, 1:30, and 1:40, which is used as a material for making foam. This study aimed to
determine geopolymer foam concrete's physical and mechanical properties with various foaming agents
and water. The results of testing for air content in fresh concrete indicate that the use of more foaming
agents in the manufacture of foam can improve the quality of the foam and reduce the air content of the
concrete so that it can increase the compressive strength of the test object. The use of fewer foaming
agents can reduce the density of geopolymer foam concrete.