Assessing low thermal conductivity of bricks which contain rice husk, corn cob and waste tea as an additive material

Mat Saman, Nor Sarwani (2017) Assessing low thermal conductivity of bricks which contain rice husk, corn cob and waste tea as an additive material. Masters thesis, Universiti Tun Hussein Onn Malaysia.

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Abstract

Energy efficient buildings have emerged as a new approach to encourage use of natural resources and reduction of energy requirements. Thermal and mechanical brick properties play an important role in designing modern buildings. Decreasing thermal conductivity is the dominant factor in reducing heat that could be transferred to or from the building. The main objective of this study is to produce low thermal conductivity brick which helps in improving the surface temperature of the building. Malaysia climate which is 30˚C – 34˚C, exceed the thermal comfort of 26˚C. Excessive heat in the buildings causes discomfort to the occupants. Malaysia produce a vast amount of agricultural waste which is 47, 402 dry/kilotonne/year. It will lead to the disposal problem of these waste materials. Recycling rice husk (RH), waste tea (WT) and corn corb (CC) into fired clay brick can improve thermal conductivity of the existing fired clay brick and reduce waste disposal problem. This study was conducted to identify the effects of using RH, WT and CC on the physical, mechanical and thermal properties of fired clay bricks. The percentage of RH, WT and CC used are 2.5%, 5%, 7.5% and 10%. Standard size of fired clay brick are 215 mm x 102.5 mm x 65 mm. Compressed Stabilized Earth Machine (CSEM) with 900-1000 psi pressure was used in producing these bricks. This study focused on the compressive strength, water absorption and thermal conductivity of the fired clay bricks according to the BS 3921: 1985, MS 76: 1972 and ASTM C518 respectively. Results show that the compressive strength value decrease, water absorption increase and thermal conductivity decrease as the percentage of RH, WT and CC used is increased. However, all the result obtained still complies with the standard used. 7.5% RH (chosen from the low thermal conductivity value and have optimum compressive strength) and control brick (CB) was used to build a small masonry wall sized 1m length x 0.215 m width x 1m height. Result indicates that RH small masonry wall recorded low temperature compared to the CB small masonry wall. Low thermal conductivity bricks can helps in reducing heat absorbed by the bricks and provide better comfort condition to the occupants.

Item Type: Thesis (Masters)
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA401-492 Materials of engineering and construction. Mechanics of materials
Divisions: Faculty of Civil Engineering and Built Environment > Department of Civil Engineering : Building and Construction Engineering
Depositing User: Mrs. Sabarina Che Mat
Date Deposited: 06 Sep 2021 04:21
Last Modified: 06 Sep 2021 04:21
URI: http://eprints.uthm.edu.my/id/eprint/841

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