Development of coconut coir-based lightweight cement board C. Asasutjarit a , J. Hirunlabh a, * , J. Khedari d , S. Charoenvai a , B. Zeghmati b , U. Cheul Shin c a Building Scientific Research Center (BSRC), King MongkutÕs University of Technology, Thonburi, Thailand b Centre d’Etudes Fondamentales, Groupe de Me ´canique, Acoustique et Instrumentation, Universite ´ de Perpignan, Perpignan cedex, France c BELab, Architectural Engineering, Daejeon University, Yongun-dong, Dong-ku, Daejeon, Republic of Korea d South-East Asia University, Bangkok, Thailand Received 23 February 2005; received in revised form 20 August 2005; accepted 26 August 2005 Available online 18 October 2005 Abstract This paper presents investigation conducted in Thailand on the development of coconut coir-based lightweight cement boards (CCB). These boards were made from coconut coir, cement and water. They are intended to be used as building components for energy con- servation. The investigations focused on parameters, mainly, fiber length, coir pretreatment and mixture ratio that affect the properties of boards. The physical, mechanical and thermal properties of the specimens were determined after 28 days of hydration. Results of this study indicated that the best pretreatment of coir fibers was to boil and wash them as it can enhance some of the mechanical properties of coir fiber. The optimum fiber length was 1–6 cm fraction, and optimum (cement:fiber:water) mixture ratio by weight was 2:1:2. The pro- duced CCBs satisfied most recommended mechanical standards. In addition, investigation on thermal property of specimens revealed that coconut coir-based lightweight cement board has lower ther- mal conductivity than commercial flake board composite. That is an important feature to promote the use of CCBÕs as energy saving material in buildings. Ó 2005 Elsevier Ltd. All rights reserved. Keywords: Internal bond; Modulus of rupture (MOR); Modulus of elasticity (MOE); Thermal conductivity; Water absorption 1. Introduction During the last decades, knowledge of natural fiber use in cement composites, mechanisms of mechanical behavior, insulating behavior, etc. has increased substantially. The literature is rich and various textbooks and research papers are already available. Many literatures [1–3] indicated var- ious advantages in the use of natural fibers in cement com- posites, among them the following: increased flexural strength, post-crack load bearing capacity, increased im- pact toughness and improved bending strength [4,5]. Natu- ral fibers exhibit many advantageous properties as reinforcement for composites [5–12]. By far the best advan- tage of using natural fibers is that they offer significant cost reduction and benefits associated with processing [13,14], as compared to synthetic fibers. ThatÕs why they are cur- rently getting a lot of attention for replacing synthetic fi- bers [15]. At the present time, due to simultaneous awareness in- crease on environment and energy, increasing attention should be paid to natural fibers with a view to conserving energy and protecting the environment. In a previous work, our team reported that the addition of natural fiber reduced the thermal conductivity of the composite speci- mens and yielded a lightweight product [16]. Development of composite materials [17,18] for buildings using natural fiber such as coconut coir and durian fiber with low ther- mal conductivity is an interesting alternative which would solve environment and energy concern. In this study, the idea was to use coconut coir to pro- duce lightweight cement boards (CCB) with low thermal 0950-0618/$ - see front matter Ó 2005 Elsevier Ltd. All rights reserved. doi:10.1016/j.conbuildmat.2005.08.028 * Corresponding author. Tel.: +66 2 470 8621; fax: +66 2 428 4217. E-mail address: [email protected] (J. Hirunlabh). www.elsevier.com/locate/conbuildmat Construction and Building Materials 21 (2007) 277–288 Construction and Building MATERIALS
Development of coconut coir-based lightweight cement board
Jun 16, 2023
This paper presents investigation conducted in Thailand on the development of coconut coir-based lightweight cement boards (CCB).
These boards were made from coconut coir, cement and water. They are intended to be used as building components for energy conservation. The investigations focused on parameters, mainly, fiber length, coir pretreatment and mixture ratio that affect the properties
of boards.
Welcome message from author
This paper presents investigation conducted in Thailand on the development of coconut coir-based lightweight cement boards (CCB). These boards were made from coconut coir, cement and water. They are intended to be used as building components for energy conservation. The investigations focused on parameters, mainly, fiber length, coir pretreatment and mixture ratio that affect the properties of boards.
Related Documents
