International Journal of Civil and Structural Engineering Research ISSN 2348-7607 (Online) Vol. 8, Issue 1, pp: (94-104), Month: April 2020 - September 2020, Available at: www.researchpublish.com
UTILIZATION OF RICE STRAWS AS FIBER REINFORCEMENT IN RICE HUSK ASH CEMENT BONDED BOARD Jerby C. Bunda1, John Ceasar D. Diloy2, Trixy L. Gatbunton3, John Renz D. Tabigne4, Engr. Siva Das Abaya5 College of Engineering, Computer Studies, and Architecture Lyceum of the Philippines University – Cavite
Abstract: The purpose of this research is to develop an alternative material for composite board that will utilize wastes which are produced by the rice industry. Wood species, agricultural fibrous residues as well as agricultural wastes can be applied inside the fabrication of composite boards, this led the researchers to use the wastes from rice plantations as a raw material for the product. The results showed the significance of the quantity of materials to be used, the Modulus of Rupture Test reveals the strength of 70:30 binder to fiber Ratio to be 6.23 megapascals, in Face Screw Holding Test and Nail Head Pull Test, the board passed having a strength of 105.90-kilogram force and 95.39-kilogram force. The results of Thickness Swell Test showed that the amount of swell of the board after the test is 12.29%, and the amount of moisture of the board is 6.59% which were determined using the Moisture Keywords: Rice Straw, Cement Board, Rice Husk Ash, Cladding.
I. INTRODUCTION Building materials cost has increased over the past years. Rapid population growth combined with low income has become a hindrance in the goals of building shelters. This has led to researches in the development of alternative construction materials that is versatile, strong, and relatively low cost. One of such desirable alternative raw construction materials are composite boards which are made from wood-based products. Wood species, agricultural fibrous residues as well as agricultural wastes could be utilized in the fabrication of composite boards. One of the types of composite boards used in the industry is cement bonded particle board. Cement bonded particle boards has a wide variety of use such as for wall cladding interior surfaces in applications where the surface must be durable, wear-resistant and with good sound insulation properties plus moisture proof and fungus resistant. DOST-FPRDI has also introduced uses for cement bonded particle boards as materials for construction of cabinets, tables, and as accent to wood chairs. Economic potentiality in utilization of rice hull ash and rice straws in production of cement bonded particle board shall be studied in this research. Being an agricultural country, rice plantations could be found all over the country. During the milling process, only the hulled rice grains are sold and consumed by humans leaving behind the rice straws and rice husks after the milling process. These materials are either burned down contributing to air pollution or left at the fields to decompose and to be utilized as fertilizers. Researches have been conducted and proven that rice husk ash could be utilized as partial cement substitute. It was discovered by researchers in our country and abroad that 25% replacement of rice hull ash in cement exhibited no degradation in strength. Rice straws which are also burned could be used as reinforcing fibers to cement bonded board which could be a sustainable building material. Philippines produces 15.2 million tons of rice which leaves at about 11.3 million tons of rice straws every year. Rice straws are burned during harvest season causing air pollutants such as carbon dioxide, carbon monoxide, nitrogen oxide, and Sulphur dioxide. According to researches, if such practice was continually done, it will decrease soil’s nitrogen. This
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