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Hempcrete is a sustainable bio-composite consisting of the woody component of hemp stalk, and lime blended with water. Hempcrete has been considered as an eco-friendly alternative to traditional construction building materials. This study has fabricated hempcrete composite consists of gypsum and hemp shives for sound absorption, and graphite was incorporated to improve the antistatic electricity. Three controlled factors: the length of hemp, the content of hemp, and graphite with four levels for each factor were chosen.  Taguchi  method based on orthogonal array L 16  was employed to conduct the experiments. According to the results of  Taguchi ’s orthogonal array L 16 , analysis of variance (ANOVA) was used to evaluate the effects of various factors. The determination of optimal production parameters of gypsum/hempcrete composite was also investigated. According to the analysis, it has indicated that hemp content and graphite were the two most effective parameters on sound absorption, where hemp content exhibited a significant effect at 99% confidence level, and the confidence level of graphite is 95%. The antistatic electricity of gypsum/hempcrete composite is highly related to the incorporation of graphite with 99% confidence level.

Fabrication of Sound Absorption Gypsum/Hempcrete Composite with Robust Antistatic Electricity by Taguchi Optimization Method