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

ABSTRACT

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 L₁₆ was employed to conduct the experiments. According to the results of Taguchi’s orthogonal array L₁₆, 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.

摘要

汉麻混凝土是由汉麻茎杆的木质成分、石膏粉与水的混合物组成的生物质复合材料，具有良好环保性能的汉麻混凝土被认为是传统建筑材料的替代品。本文以石膏粉和汉麻纤维为原料，制备得到石膏 / 汉麻吸声复合材料，并添加石墨粉体来改善抗静电性能。选择大麻长度、大麻含量和石墨含量为变量，每个变量设置 4 个水平值，进行田口式正交试验设计（L₁₆）。根据正交试验的结果，采用方差分析法 (ANOVA) 来分析各变量对结果的影响，并优化石膏 / 汉麻混凝土复合材料的生产工艺参数。分析表明，大麻和石墨添加量对吸声性能有显著影响，置信水 分别为 99% 和 95%，而抗静电性能则与石墨添加量密切相关，置信水平为 99%。

KEYWORDS:

• Hempcrete
• graphite
• sound absorption
• antistatic electricity

关键词:

• 汉麻混凝土
• 石墨
• 吸声
• 抗静电

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This research was supported by the Natural Science Foundation of China [No. 12004288], Key Laboratory of Science & Technology of Eco-Textile, Ministry of Education, Donghua University [No. 2232021G-04].