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Rice husk-earth based composites: A novel bio-based panel for buildings refurbishment

Antunes, A, Faria, P, Silva, V and Brás, A (2019) Rice husk-earth based composites: A novel bio-based panel for buildings refurbishment. Construction and Building Materials, 221. pp. 99-108. ISSN 0950-0618

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Abstract

With the aim of developing economic and ecological bio-based composite panels to be used on indoor wall or ceiling coating systems, contributing to hygrothermal comfort and health, three different composite formulations were produced, differing on the content and pre-treatment of rice husk: 15% and 30%, only dried or previously boiled. Composite samples were tested for biological development and several physic-mechanical characteristics. Increasing on rice husk content decreases thermal conductivity due to bulk density decrease, decreasing ultrasound velocity, flexural strength, abrasion and fire resistance, but improving the moisture buffering capacity at least in 20%. For high rice husk-content composites, its pre-boiling decreases biological susceptibility although decreasing resistance to fire, most probably due to destruction of the cellulose wall, but significantly increases abrasion resistance and compressive strength, probably because of a better bond between the rice husk and the earthen matrix, quicker reaching a high water vapour adsorption limit.

Item Type: Article
Uncontrolled Keywords: 0905 Civil Engineering, 1202 Building
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TH Building construction
Divisions: Built Environment
Publisher: Elsevier
Date Deposited: 28 Oct 2019 11:56
Last Modified: 28 Oct 2019 12:00
DOI or Identification number: 10.1016/j.conbuildmat.2019.06.074
URI: http://researchonline.ljmu.ac.uk/id/eprint/11659

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