Vol 7, No 7 (2016) > Civil Engineering >

The Effects of Foam Beads and Kaolin on Physical and Thermal Properties of Concrete Blocks

Korb Srinavin, Patipat Tunming

 

Abstract: It is widely use of
air-conditioning systems in Thailand due to its location. It is located in a
tropical zone with relatively high temperatures all year round, with high
humidity and high intensity of sunlight. In order to save electrical energy for
air-conditioning systems, preventing heat transfer into the building is
required. The objective of this study is to investigate the physical and
thermal properties of concrete blocks. An attempt is made to increase heat
resistance of concrete blocks. Foam beads (0-0.30% by weight) and kaolin (0-70% by weight) were
added in concrete block mixture to increase discontinuous voids in concrete.
Compressive strength and water absorption of concrete blocks were tested. The
testing results indicated that compressive strength decreased when foam beads
and kaolin were added. Water absorption increased when foam beads were added.
In contrast, the more kaolin added the less water absorption. The thermal
conductivity coefficient of concrete blocks was also investigated. The results
confirmed that the higher the amount of foam beads or kaolin added, the higher
the thermal resistance of concrete blocks. Thermal time-lag behavior was also
investigated. The results indicated that concrete block with kaolin took the
longest time in heating and took the shortest time in cooling. These properties
are good for heat prevention in hot climate regions. These concrete blocks
which were developed and tested in this research conform to the Thai Industrial
Standard. Finally, it can be concluded that because of its thermal behavior,
concrete block with kaolin is a suitable energy-saving concrete block for hot
and humid climates.
Keywords: Concrete blocks; Foam beads; Kaolin; Physical properties; Thermal properties

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References


ASHRAE, 2009. Handbook Fundamentals S-I Edition. American Society of Heating Refrigerating and Air-Conditioning Engineers Inc, Atlanta, Georgia: USA

ASTM C140-70, 1970. Standard Test Methods for Sampling and Testing Concrete Masonry Units and Related Units. West Conshohocken: Pa., USA

ASTM C177-10, 2005. Standard Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Guarded-Hot-Plate Apparatus. West Conshohocken: Pa; 2010. Bruker,

APEX2, SAINT and SADABS, Bruker AXS Inc., Madison, Wisconsin, USA

Avallone, E.A., Baumeister III T., 1996. Marks Standard Handbook for Mechanical Engineers. New York, Mc Graw-Hill International Edition

Campo, E.A., 2008. Selection of Polymeric Material. William Andrew Inc. New York, USA

DEDE, 2005. Energy in Thailand: Facts & Figures 2005. Department of Alternative Energy Development and Efficiency Ministry of Energy: Thailand

DEDE, 2014. Energy in Thailand: Facts & Figures 2014. Department of Alternative Energy Development and Efficiency Ministry of Energy: Thailand

Karnchana, B., 2008. A Test of Relationship between Electricity Consumption and Economic Growth of Thailand. An Independent Study Report, Chiang Mai University

Srinavin, K., Mohamed, S., 2003. Thermal Environment and Construction Worker’s Productivity: Some Evidence from Thailand. Building and Environment, Volume 38(2), pp. 339-345

TIS 58-2533, 1990. Standard for Hollow Non-load Bearing Concrete Masonry Units. Thai Industrial Standard Institute, Ministry of Industry

Ugheoke, B.I., Onche, E.O., Namessan, O.N., Asikpo, G.A., 2006. Property Optimization of Kaolin - Rice Husk Insulating Fire – Bricks. Leonardo Electronic Journal of Practices and Technologies, Volume 5, pp. 167-178