Open AccessThe effect of pumice composition upon transmission loss and impact strength of pumice hybrid composite–coconut fiber/gypsum
Author(s) -
Npg Suardana,
Cokorda Istri Putri Kusuma Kencanawati,
I Ketut Gede Sugita,
I. G. N. Wardana,
Imam Pratama Putra
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/839/1/012020
Subject(s) - pumice , composite material , materials science , gypsum , charpy impact test , soundproofing , fiber , microstructure , geology , volcano , seismology
Voice could not be separated from ears, but there is other sound called noise. Soundproofing panel in a room is highly important to hold and absorb sound in order to prevent sound to come and out of the room so the room will be comfortable. The objective of this study is to find the characteristic of transmission loss and the value of impact strength caused by the effect of pumice and gypsum composition. This study used 2 mm pumice combined with coconut fiber in 20% of fiber volume fraction, by using gypsum and glue matrix. The varied composition of this study used two comparisons Gypsum: Pumice: Glue of 1:1:1/2, and 1:2:1/2. Transmission loss was tested by using test equipment (ASTM-E-1050) and Sound Level Master (SL-4011), while the impact strength was tested by using Charpy Impact test equipment (ISO179-2). Result of this study showed that the lowest transmission loss occurred in specimen with composition 1:1:1/2 with value 13.48dB, while the highest transmission loss occurred in specimen with composition 1:2:1/2 with value 25.21dB. The lowest impact strength occurred in specimen with composition 1:2:1/2 with value 4.293kJ/m2, while the highest mean value for impact strength was 5, 534 kJ/m2 which occurred in composition 1:1:1/2.