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Title: Development and life cycle assessment of agricultural waste materials as thermal insulation for dwellings in Thailand
Author: Panyakaew, Satta
ISNI:       0000 0004 2742 4495
Awarding Body: University of Sheffield
Current Institution: University of Sheffield
Date of Award: 2012
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This thesis investigates the use of agricultural waste materials as alternative raw material for thermal insulation for dwellings in Thailand. A literature review carried out to study the potential of several agricultural waste materials suggested that coconut husks, bagasse and rice hulls offer high potential due to their availability in Thailand, low thermal conductivity, and ability to be made into low density boards. The Life Cycle Assessment (LCA) was carried out to compare the environmental and health impacts of thermal insulation boards made from agricultural waste materials currently available on the market with conventional insulation materials. This suggested that the currently available thermal insulation boards made from agricultural waste materials generally had more environmental and health impacts than conventional insulation materials. However, coconut husks and bagasse showed potential; the environmental and health impacts of the insulation boards made from these materials were low and could be lower provided that they were produced with lower thermal conductivity and lower density and without chemical binder. Low-density binderless thermal insulation boards were then developed from coconut husks and bagasse using a hot pressing method with varying hot pressing conditions. The results showed that board density, hot pressing temperature and pressing time were associated with the physical properties of both coconut husk and bagasse insulation boards, including modulus of rupture, modulus of elasticity and internal bond. It was also found that while both binderless coconut and bagasse insulation boards had thermal conductivity values in the same range as those of conventional insulation materials, the binderless bagasse insulation boards had better mechanical properties than coconut boards. Binderless bagasse insulation boards produced at a density of 350 kg/m3 treated at a hot pressing temperature of 200°C for 13 min could satisfy the requirements of JIS A 5905:2003 Insulation Fibreboards except for thickness swelling. LCA was carried out for two potential bagasse insulation boards (350 and 230 kg/m3 density) in comparison with conventional insulation materials. The results suggested that a board of 230 kg/m3 density offers lower environmental impacts than cellulose, fibreglass and rock wool insulations. The outcome of this study indicates that bagasse, an agricultural waste material, has significant potential as alternative raw material for thermal insulation production in the context of Thailand.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available