Podinehpoor, M., Ebrahimi, G., Tajvidi, M., Chahar mahali, M., Ramtin, A. (2006). THE EFFECTS OF TWO KINDS OF AGRICULTURAL WASTES (WHEAT AND BARELY STRAWS) ON NRC% OF ASPEN PARTICLEBOARDS. , 21(No., 2), 61-69. doi: 10.22092/ijwpr.2006.117594
Mohammad ali Podinehpoor; Ghanbar Ebrahimi; Mehdi Tajvidi; Majid Chahar mahali; Ali akbar Ramtin. "THE EFFECTS OF TWO KINDS OF AGRICULTURAL WASTES (WHEAT AND BARELY STRAWS) ON NRC% OF ASPEN PARTICLEBOARDS". , 21, No., 2, 2006, 61-69. doi: 10.22092/ijwpr.2006.117594
Podinehpoor, M., Ebrahimi, G., Tajvidi, M., Chahar mahali, M., Ramtin, A. (2006). 'THE EFFECTS OF TWO KINDS OF AGRICULTURAL WASTES (WHEAT AND BARELY STRAWS) ON NRC% OF ASPEN PARTICLEBOARDS', , 21(No., 2), pp. 61-69. doi: 10.22092/ijwpr.2006.117594
Podinehpoor, M., Ebrahimi, G., Tajvidi, M., Chahar mahali, M., Ramtin, A. THE EFFECTS OF TWO KINDS OF AGRICULTURAL WASTES (WHEAT AND BARELY STRAWS) ON NRC% OF ASPEN PARTICLEBOARDS. , 2006; 21(No., 2): 61-69. doi: 10.22092/ijwpr.2006.117594

THE EFFECTS OF TWO KINDS OF AGRICULTURAL WASTES (WHEAT AND BARELY STRAWS) ON NRC% OF ASPEN PARTICLEBOARDS

تحقیقات علوم چوب و کاغذ ایران
Article 7, Volume 21, No., 2 - Serial Number 25, October 2006, Pages 61-69    PDF (278.68 K)
Document Type: Research Paper
DOI: 10.22092/ijwpr.2006.117594
Authors
Mohammad ali Podinehpoor1; Ghanbar Ebrahimi2; Mehdi Tajvidi2; Majid Chahar mahali3; Ali akbar Ramtin2
1FACULTY OF NATURAL RESOURCES, UNIVERSITY OF TEHRAN
2Wood and paper science and technology department, of natural Resources faculty, university of Tehran. IRAN
3Tarbiat Modares University
Abstract
In this investigation, the influences of two kinds of agricultural wastes (wheat and barely straws) mixed with Aspen particles were studied for use as insulation boards. Barely and wheat straws were chosen because of their availability. The manufacturing parameters were: a specific gravity of 0.2, 0.4 and 0.6 gr/cm3, and residual agriculture contents (0/1 00, 10/90, 20/80 and 30/70 weight of residual agriculture/ wood particle) of 0, 10, 20 and 30wt%. A commercial urea-fonnaldehyde adhesive was used as composite binder. Sound absorption coefficients were measured at five frequencies (250, 500, 1000, 2000, and 4000 hertz).The results showed when frequencies increased, sound absorption increased until it reaches to 2000 hertz but in 4000 hertz, sound absorption decreased. Between manufacturing parameters, kind of straws didn't have significant influence on noise reduction coefficient. The best density for absorb waves under 1000 in hertz was 0.4 gr/cm3 with 30% of straws but for waves with frequency higher than 1000 in hertz the best density was 0.2 gr/cm3 with 30% of straws.
Keywords
AGRICULTURAL WASTES; ASPEN; WHEAT AND BARELY STRAWS; SOUND ABSORPTION COEFFICIENT
References
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