Fabrication of cement blocks using rice husk ash and lignocellulosic fibers | ||
| تحقیقات علوم چوب و کاغذ ایران | ||
| Article 1, Volume 28, Issue 3 - Serial Number 44, October 2013, Pages 393-404 PDF (279.06 K) | ||
| Document Type: Research Paper | ||
| DOI: 10.22092/ijwpr.2013.3345 | ||
| Authors | ||
| Kamrava Pourhooshyar Ziabari1; Javad Torkaman2; Alireza Ashori3; Yahya Hamzeh* 4 | ||
| 1M.Sc. Student, Department of Wood and Paper Science and Technology, Faculty of Natural Resources, University of Tehran, Karaj, Iran. | ||
| 2Assistant Professor, Department of Forestry, Faculty of Natural Resources, University of Guilan, Somesara, Iran | ||
| 3Associate Professor, Department of Chemical Technologies, Iranian Research Organization for Science and Technology (IROST), Tehran, Iran | ||
| 4Corresponding author, Associate Professor, Department of Wood and Paper Science and Technology, Faculty of Natural Resources, University of Tehran, Karaj, Iran. | ||
| Abstract | ||
| Physical and mechanical properties of lightweight cement blocks made from lignocelluosic fibers and rice husk ash (RHA) were investigated. The cement blocks were made using three types of natural fibers including old corrugated container (OCC), virgin kraft pulp and fiberboard fibers representing 25% of dry weight of the block. Rice husk ash varied at 0, 25 and 50 WT% combined with 5 WT% CaCl2. Density, water adsorption and compressive strengths of blocks were measured and compared using a factorial experiment with two factors at three levels. The results showed the significant effect of fiber type on the properties of blocks. OCC fibers provided the highest density and compressive strength and had the lowest water adsorption. The density of blocks reduced at higher dosage of RHA varied from 0 to 50%, and the lowest water adsorption and highest compressive strength was obtained at 25% RHA charge. The interactive effects of raw material on the properties of cement blocks were significant and the optimum properties were obtained with OCC fibers and RHA at 25%. رص�" ��0#� pl� � همراه 5 درصد کلرید کلسیم در قالب طرح فاکتوریل دو عامله 3´3 و با سه تکرار، مجموعاً 27 بلوک سیمانی تهیه شد و دانسیته، مقدار جذب آب و مقاومت فشاری آنها مقایسه شد. تحلیل آماری مقاومت فشاری بلوکها نشان داد که اثر هر سه نوع الیاف در سطح 5 درصد معنیداری است. بهطوریکه بلوکهای ساخته شده از الیاف بازیافتی دارای بیشترین دانسیته و مقاومت فشاری و همچنین کمترین مقدار جذب آب بودند. البته اثر مقدار خاکستر سبوس برنج بر خواص بلوکها نشان داد با افزایش مقدار خاکستر از صفر درصد به 50 درصد، دانسیتة بلوکها کاهش مییابد، ولی بهترین نتایج جذب آب و مقاومت فشاری در میزان 25 درصد خاکستر سبوس برنج حاصل شد. بررسی اثر متقابل مواد استفاده شده بر خواص بلوکها نیز نشان داد که مقدار خاکستر سبوس برنج و نوع الیاف بر هم اثر معنیداری دارند و مطلوبترین بلوکها با استفاده از الیاف کاغذ بازیافتی و مقدار خاکستر سبوس به مقدار 25 درصد سیمان حاصل شد. | ||
| Keywords | ||
| Lightweight cement blocks; lignocellulosic fibers; Rice Husk Ash; compressive strength; physical properties | ||
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