Utilization of styrofoam in lightweight concrete as a soundproof wall

Abstract Lightweight concrete panel walls are an innovation in concrete used for building walls. Since conventional concrete has a specific gravity of about 2400 kg/m 3 , it is quite heavy, creating a need for new, lighter, and soundproof materials. A new alternative to achieve lightweight materials is the combination of normal concrete and Styrofoam. In lightweight concrete construction that has compressive strength according to needs, it is one of the desired alternatives. This research aims to evaluate the utilization of the properties of Styrofoam as the main material in making lightweight concrete which has a volume weight of less than 1900 kg/m 3 and adequate compressive strength. The method is carried out by making a cylindrical test object with a diameter of 15-30 cm which is tested with a concrete press to measure the compressive strength of the wall. Identify the quality of compressive strength of lightweight concrete by adding material Styrofoam with a Styrofoam material ratio of 1Pc: 2Pc: 3 styrofoam, 1 Pc: 1.5 Sand: 2.5 Styrofoam, and composition 1 Pc: 1.25 Sand: 2.75 Styrofoam. The literature review regarding lightweight concrete made from Styrofoam is on mechanical performance, durability and soundproofing capabilities compared with laboratory research. The results of this research on lightweight concrete mixed with styrofoam have the potential to reduce the specific gravity of concrete so that it affects the weight of walls as a building material.