Improvement of dimensional stability and mechanical properties of gypsum particleboard by adding white cement

In the present research improvement of dimensional stability and mechanical properties of gypsum particleboard by using white cement was investigated. In manufacturing gypsum particleboard, Micronize gypsum was used in three levels of 2.5:1, 2.75:1 and 3:1 to dried mass of wooden materials. White ce...

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Autores principales:	Saeed Khojasteh Khosro, Mohammad Hasan Payan, Seyyed Mehdi Seyydi
Formato:	article
Lenguaje:	FA
Publicado:	Regional Information Center for Science and Technology (RICeST) 2015
Materias:	Gypsum particleboard Micronize gypsum White cement Setting time of gypsum Dimensional stability MECHANICAL PROPERTIES Forestry SD1-669.5
Acceso en línea:	https://doaj.org/article/85951eda6ec749158fc7c07efb991016
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spelling	oai:doaj.org-article:85951eda6ec749158fc7c07efb9910162021-12-02T07:17:42ZImprovement of dimensional stability and mechanical properties of gypsum particleboard by adding white cement1735-09132383-112X10.22092/ijwpr.2015.11900https://doaj.org/article/85951eda6ec749158fc7c07efb9910162015-03-01T00:00:00Zhttp://ijwpr.areeo.ac.ir/article_11900_5644e498db2670d095d8507453aba844.pdfhttps://doaj.org/toc/1735-0913https://doaj.org/toc/2383-112XIn the present research improvement of dimensional stability and mechanical properties of gypsum particleboard by using white cement was investigated. In manufacturing gypsum particleboard, Micronize gypsum was used in three levels of 2.5:1, 2.75:1 and 3:1 to dried mass of wooden materials. White cement was added in 2 levels of 5 and 10% based on oven dried mass of gypsum to reinforce gypsum particleboard properties. Water absorption, thickness swelling after 2 and 24 hours immersion in water, bending strength, modulus of elasticity and internal bond strength were measured. Vicat needle method was used to investigate the effect of adding cement on setting time of gypsum. The results showed that adding 5% cement based on oven dried mass of gypsum, increased setting time and also mechanical properties. Adding cement over than 5% (10%), significantly improved dimensional stability but reduced setting time of gypsum and mechanical properties of the boards. On the other hand, results indicated that using Micronize gypsum to 2.75 times to dried mass of wooden materials, increased bending strength and modulus of elasticity. Increasing gypsum in to 3 times, reduced bending strength and modulus of elasticity, but improved internal bond strength and dimensional stability.Saeed Khojasteh KhosroSaeed Khojasteh KhosroMohammad Hasan PayanSeyyed Mehdi SeyydiRegional Information Center for Science and Technology (RICeST)articleGypsum particleboardMicronize gypsumWhite cementSetting time of gypsumDimensional stabilityMECHANICAL PROPERTIESForestrySD1-669.5FAتحقیقات علوم چوب و کاغذ ایران, Vol 30, Iss 1, Pp 132-143 (2015)
institution	DOAJ
collection	DOAJ
language	FA
topic	Gypsum particleboard Micronize gypsum White cement Setting time of gypsum Dimensional stability MECHANICAL PROPERTIES Forestry SD1-669.5
spellingShingle	Gypsum particleboard Micronize gypsum White cement Setting time of gypsum Dimensional stability MECHANICAL PROPERTIES Forestry SD1-669.5 Saeed Khojasteh Khosro Saeed Khojasteh Khosro Mohammad Hasan Payan Seyyed Mehdi Seyydi Improvement of dimensional stability and mechanical properties of gypsum particleboard by adding white cement
description	In the present research improvement of dimensional stability and mechanical properties of gypsum particleboard by using white cement was investigated. In manufacturing gypsum particleboard, Micronize gypsum was used in three levels of 2.5:1, 2.75:1 and 3:1 to dried mass of wooden materials. White cement was added in 2 levels of 5 and 10% based on oven dried mass of gypsum to reinforce gypsum particleboard properties. Water absorption, thickness swelling after 2 and 24 hours immersion in water, bending strength, modulus of elasticity and internal bond strength were measured. Vicat needle method was used to investigate the effect of adding cement on setting time of gypsum. The results showed that adding 5% cement based on oven dried mass of gypsum, increased setting time and also mechanical properties. Adding cement over than 5% (10%), significantly improved dimensional stability but reduced setting time of gypsum and mechanical properties of the boards. On the other hand, results indicated that using Micronize gypsum to 2.75 times to dried mass of wooden materials, increased bending strength and modulus of elasticity. Increasing gypsum in to 3 times, reduced bending strength and modulus of elasticity, but improved internal bond strength and dimensional stability.
format	article
author	Saeed Khojasteh Khosro Saeed Khojasteh Khosro Mohammad Hasan Payan Seyyed Mehdi Seyydi
author_facet	Saeed Khojasteh Khosro Saeed Khojasteh Khosro Mohammad Hasan Payan Seyyed Mehdi Seyydi
author_sort	Saeed Khojasteh Khosro
title	Improvement of dimensional stability and mechanical properties of gypsum particleboard by adding white cement
title_short	Improvement of dimensional stability and mechanical properties of gypsum particleboard by adding white cement
title_full	Improvement of dimensional stability and mechanical properties of gypsum particleboard by adding white cement
title_fullStr	Improvement of dimensional stability and mechanical properties of gypsum particleboard by adding white cement
title_full_unstemmed	Improvement of dimensional stability and mechanical properties of gypsum particleboard by adding white cement
title_sort	improvement of dimensional stability and mechanical properties of gypsum particleboard by adding white cement
publisher	Regional Information Center for Science and Technology (RICeST)
publishDate	2015
url	https://doaj.org/article/85951eda6ec749158fc7c07efb991016
work_keys_str_mv	AT saeedkhojastehkhosro improvementofdimensionalstabilityandmechanicalpropertiesofgypsumparticleboardbyaddingwhitecement AT saeedkhojastehkhosro improvementofdimensionalstabilityandmechanicalpropertiesofgypsumparticleboardbyaddingwhitecement AT mohammadhasanpayan improvementofdimensionalstabilityandmechanicalpropertiesofgypsumparticleboardbyaddingwhitecement AT seyyedmehdiseyydi improvementofdimensionalstabilityandmechanicalpropertiesofgypsumparticleboardbyaddingwhitecement
_version_	1718399524318216192

Improvement of dimensional stability and mechanical properties of gypsum particleboard by adding white cement

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