Development of Calcined Clay from Northeast used as Binder in Casting Process of Rice Polishing Cylinder
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Abstract
The objective of this research was to develop calcined clay the Northeast of Thailand as a binder in the casting process of rice polishing cylinders in replacement of the imported calcined magnesite cement and to reduce production costs of the cylinder. Calcined clay from 3 different regions namely, Nakhon Ratchasima, Buriram and Ubon Ratchathani was mixed with rice husk ash to increase hardness. The design of experiment analysis using MINITAB Release 14 Program was evaluated base on the compressive strength and tensile strength testing. According to the analysis results, it was found the optimal formulas as calcined clay: rice husk ash from Nakhon Ratchasima, Buriram and Ubon Ratchathani equal to 83: 17, 75: 25 and 78: 22 respectively. When using the optimal formulas to cast and test the rice milling, it found Nakhon Ratchasima, Buriram and Ubon Ratchathani calcined clay cylinders showed the average broken rice percentages as 31.48, 32.41 and 38.91 respectively and were significant at a level as a=0.05. While the average rates of Nakhon Ratchasima, Ubon Ratchathani and Buriram calcined clay cylinders were 4.675, 5.230 and 5.437 g/hr respectively by not having significant at level as a=0.05.
Article Details
บทความที่ได้รับการตีพิมพ์เป็นลิขสิทธิ์ของ วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยอุบลราชธานี
ข้อความที่ปรากฏในบทความแต่ละเรื่องในวารสารวิชาการเล่มนี้เป็นความคิดเห็นส่วนตัวของผู้เขียนแต่ละท่านไม่เกี่ยวข้องกับมหาวิทยาลัยอุบลราชธานี และคณาจารย์ท่านอื่นๆในมหาวิทยาลัยฯ แต่อย่างใด ความรับผิดชอบองค์ประกอบทั้งหมดของบทความแต่ละเรื่องเป็นของผู้เขียนแต่ละท่าน หากมีความผิดพลาดใดๆ ผู้เขียนแต่ละท่านจะรับผิดชอบบทความของตนเองแต่ผู้เดียว
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