A Study of Light Wall Properties of Cement Paper Bags

Abstract

This research was conducted to study the lightweight wall panels made from waste cement bags by following processes: grinding them, then mixing them with powdered glue and latex glue at the ratio of 5%, 10% and 15% of the weight of materials used, after that making heat extrusion at the size of 30 x 30 x 1 cm and using powdered glue and latex glue as bonding materials. This wall panel was tested of physical properties and mechanical properties in accordance with TIS.966-2547 standard. The research result was found that when testing physical properties on density, moisture, water absorption and thickness swelling, the lightweight wall panel using powdered glue at the ratio of 15% could fulfill the standard. Regarding the test result of mechanical properties on bending resistance, modulus of elasticity and surface tensile strength, it was found that the tensile strength perpendicular to the surface passed the criteria set by the standard. Additionally, the test of sound absorption was found that the lightweight wall panel had the average sound level in every frequency at 10.29 decibels. When comparing the values of sound absorption with the medium density fiberboard and gypsum board, it was found that the lightweight wall panel made from cement bags had better sound absorption because the lightweight wall panel made from cement bags was more porous and less rigid, therefore, both types of panels to be compared had better sound absorption. Regarding the cost, it was found that the production cost of material sized 30x30x1 cm was average at 32 Baht per sheet, the production cost of material was cheaper than the general lightweight wall panels sold in the market.