Construction of a Sound Insulation Board Using Rice Husk and Sodium Silicate Adhesive
In a study conducted by a group of researchers on the topic of the article, which was carried out using adhesive produced by Petro Kavir Sadr Company, the following findings were presented:
The feasibility of producing a sound insulation board using rice husk and sodium silicate was investigated.
The panels were fabricated in two thicknesses: 16 mm and 32 mm. The density of the boards was set at 0.42 g/cm³, with sodium silicate used as the adhesive (at 30% of the dry weight of the composite), and the board structure was kept consistent across samples.
After producing four series of samples, the sound absorption coefficient of the boards was measured across frequencies ranging from 200 to 6300 Hz, in accordance with ASTM E1050. Additionally, a mineral acoustic board was used as a control sample.
The results revealed that for the 16 mm samples, the sound absorption coefficient was at its lowest between 200 and 1000 Hz, while the highest absorption was observed at frequencies above 800 Hz. Moreover, increasing the thickness of the boards led to improved absorption in the 200–800 Hz range, but resulted in decreased absorption in the 800–2000 Hz range.
In conclusion, the findings of this study indicate that sound insulation boards with acceptable acoustic absorption performance (NRC = 0.5) can be manufactured using agricultural waste (rice husk) and a mineral adhesive (sodium silicate).
The full article is available in the attached file:
