The effect of rice straw fiber addition as sound silencer and its effect to concrete mechanical properties

Abstract

In general, rice straw has not been used optimally, rice straw is currently still used as animal feed, paper-making materials and most of it is burned. In this research, rice straw is used as an added ingredient in the concrete mixture. The addition of rice straw fiber in this research uses 0%, 5%, 10%, 15%, and 20% variations of the volume. The addition of the straw fiber affects the concrete strength. In slump test, there is an increase in its values by 8, 10, 10, 10, and 1. In compressive strength test, there is a decrease by 70.76%, 68.61%, 54.35%, 53.49% of normal concrete. In the tensile strength test, there is a decrease in the concrete tensile strength value by 52.39 kg / cm2, 38.31 kg / cm2, 35.36 kg / cm2, 25.49 kg / cm2, 25.42 kg / cm2. While on the sound attenuation test, there is an increase on sound absorption coefficient, the greater the variation of rice straw, the higher the sound absorption coefficient value. The relation between concrete strength and sound absorption coefficient shows that the greater the addition of rice straw fiber, the less the strength of concrete while the sound absorption coefficient is greater.