dc.contributor.author	Aminudin, Eeydzah
dc.date.accessioned	2024-08-21T15:06:47Z
dc.date.available	2024-08-21T15:06:47Z
dc.date.issued	2015
dc.description	Thesis (PhD. (Civil Engineering))
dc.description.abstract	Malaysia, a tropical country having a warm-humid climate year round has caught an eye in the development of construction buildings. These inevitable interactive, affects the climate sensitive approach which could be control by adapting the waste as building material that can reduce the heat transfer towards the impact of temperature elevation that could cause the Urban Heat Island (UHI) effects. Hence, this study emphasize on the Agro-Industrial (Palm Oil Fuel Ash (POFA) and Bottom Ash from Coal Power Plant (BA)) wastes as an aerated concrete to enhance the insulation performance and thermal behaviour for preventing heat energy internally. The study comprises mix design of the aerated concrete with the aim of replacing 100% sand with BA and POFA as cement replacement with ratios (0, 10, 20 and 30%). The engineering properties analyzed include strength, density, thermal conductivity, porosity, and pore size distribution as potential insulator of non-load bearing concrete. Porosity and pore size distribution were determined by using the Mercury Intrusion Porosimetry. During the initial stage, the development of 100% BA as sand replacements were developed, continue by replacement of cement with POFA of different percentage. Next, the ambient temperature, surface temperature, solar radiation and relative humidity were measured every fifteen minutes for seven days. The material which exhibits low thermal conductivity, with acceptable compressive strength, good insulation properties and heat storage has been chosen for the second stage experiment. At this stage, 30 per cent of POFA (30POFA) was selected to be compared with commercial aerated concrete and the OPC Mortar. The optimum mix proportion of 30POFA is 1:1:2 (cement: lime: bottom ash), with the water dry mix of 0.29, with 1% superplasticizer and 1.5% aluminum powder. The results showed that the strength of 30POFA, 5Mpa at 28days for air cured with the density of 1226 kg/m3. Besides that, 30POFA exhibits fastest rate of heat absorption and huge amount of heat storage with time lag of 122 minutes which is 40% longer compared to 0POFA. However, 30POFA depicts slightly hotter internally (indoor) compared to commercial aerated concrete, since it is good in insulation. As for thermal conductivity, 30POFA has achieved 0.48W/mK, which is 73% reduction in thermal conductivity compared to OPC Mortar, whereas 24% reduce compared to Control Sand. As for heat transfer mechanism, 30POFA have a high peak of heat flux during mid day of 16 W/m2 and recorded lowest during night time of (3 W/mK) compared to commercial aerated concrete of (5 W/m2) mid day and 8 W/m2 at night. This proves that 30POFA have longer heat storage in mid day, and the heat (Qconv) does not release out to the atmosphere during night time. Overall, 30POFA or known as Agro-Industrial aerated concrete is proven to be reliable material for non-load bearing wall of building as Urban Heat Island mitigation
dc.description.sponsorship	Faculty of Civil Engineering
dc.identifier.uri	https://openscience.utm.my/handle/123456789/1302
dc.language.iso	en
dc.publisher	Universiti Teknologi Malaysia
dc.subject	Air-entrained concrete—Mechanical properties
dc.subject	Public buildings—Insulation
dc.subject	Insulation (Heat)
dc.title	Aerated concrete from agro-industrial waste for improvement of thermal insulation buildings
dc.type	Thesis
dc.type	Dataset

Aerated concrete from agro-industrial waste for improvement of thermal insulation buildings

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