Flame retardancy of wood bark from Keteleeria evelyniana, Pinus yunnanensis and Pinus armandii in Yunnan Province

LI Shi-you; LI Xiao-ning; LI Sheng-hong; JINGui-jun; ZHOUQuan; HUXiao-long; WANG Qiu-hua

Volume 24 Issue 2

Feb. 2017

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Article Navigation > Journal of Zhejiang A&F University > 2007 > 24(2): 192-197

LI Shi-you, LI Xiao-ning, LI Sheng-hong, et al. Flame retardancy of wood bark from Keteleeria evelyniana, Pinus yunnanensis and Pinus armandii in Yunnan Province[J]. Journal of Zhejiang A&F University, 2007, 24(2): 192-197.

Citation:

LI Shi-you, LI Xiao-ning, LI Sheng-hong, et al. Flame retardancy of wood bark from Keteleeria evelyniana, Pinus yunnanensis and Pinus armandii in Yunnan Province[J]. Journal of Zhejiang A&F University, 2007, 24(2): 192-197.

Flame retardancy of wood bark from Keteleeria evelyniana, Pinus yunnanensis and Pinus armandii in Yunnan Province

1.
School of Conservation Biology, Southwest Forestry College, Kunming 650224, Yunnan, China

Funds:

云南省自然科学基金资助项目(2003C0021Q);云南省昆明市科技局重点资助项目(06H114135)

Received Date: 2006-06-22
Rev Recd Date: 2006-10-16
Publish Date: 2007-04-20

Abstract

In central YunnanProvince,frompreviously burned standsof Keteleeria evelyniana, Pinus yunnanensis,and Pinus armandii having different forest fire behavior, wood bark structure was analyzed to determine flame retardancy factors, such as average thickness,moisture content,heat conduction coefficient,oxygen index, thermal weight loss, and inner surface temperature of the wood bark during external heat radiation. Results showed that the flame retardancywas: K. evelyniana P. yunnanensis P. armandii.Flame retardancy of the wood barkwas the main cause of fire resistance differences among the three coniferous species.Thiswas due to: 1)the integrated internal bark layer and loose external bark layer of K. evelyniana, 2)an average thickness of wood bark in K. evelyniana thatwas 1.38 times greater than P. yunnanensis and 3.07 times greater than P. armandii, 3)a heat conduction coefficient of the wood bark in K. evelyniana that was 67.66% greater than P. yunnanensis and 54.85% greater than P. armandii,and 4)an oxygen indexof the wood bark in K. evelyniana thatwas 1.4 times greater than P. yunnanensis and 1.6 times greater than P. armandii.Accordingly fire protection measures for the three specieswere putforward based on flame retardancy of thewood bark and fire resistance of the coniferous trees.Special measures neednt be done for Keteleeria evelyniana, removing surface litters and cultivationmeasures should be adopted for P. yunnanensis and P. armandii, cleaning combustibles around the bark especially should be done for P. armandii.[Ch, 3 fig. 3 tab. 11 ref.]
- forest protection,
- wood bark structure,
- heat conduction coefficient,
- oxygen index,
- flame retardancy

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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Flame retardancy of wood bark from Keteleeria evelyniana, Pinus yunnanensis and Pinus armandii in Yunnan Province

1. School of Conservation Biology, Southwest Forestry College, Kunming 650224, Yunnan, China

Funds:

云南省自然科学基金资助项目(2003C0021Q);云南省昆明市科技局重点资助项目(06H114135)

Received Date: 2006-06-22

Rev Recd Date: 2006-10-16

Publish Date: 2007-04-20

Key words:

Abstract: In central YunnanProvince,frompreviously burned standsof Keteleeria evelyniana, Pinus yunnanensis,and Pinus armandii having different forest fire behavior, wood bark structure was analyzed to determine flame retardancy factors, such as average thickness,moisture content,heat conduction coefficient,oxygen index, thermal weight loss, and inner surface temperature of the wood bark during external heat radiation. Results showed that the flame retardancywas: K. evelyniana P. yunnanensis P. armandii.Flame retardancy of the wood barkwas the main cause of fire resistance differences among the three coniferous species.Thiswas due to: 1)the integrated internal bark layer and loose external bark layer of K. evelyniana, 2)an average thickness of wood bark in K. evelyniana thatwas 1.38 times greater than P. yunnanensis and 3.07 times greater than P. armandii, 3)a heat conduction coefficient of the wood bark in K. evelyniana that was 67.66% greater than P. yunnanensis and 54.85% greater than P. armandii,and 4)an oxygen indexof the wood bark in K. evelyniana thatwas 1.4 times greater than P. yunnanensis and 1.6 times greater than P. armandii.Accordingly fire protection measures for the three specieswere putforward based on flame retardancy of thewood bark and fire resistance of the coniferous trees.Special measures neednt be done for Keteleeria evelyniana, removing surface litters and cultivationmeasures should be adopted for P. yunnanensis and P. armandii, cleaning combustibles around the bark especially should be done for P. armandii.[Ch, 3 fig. 3 tab. 11 ref.]

Flame retardancy of wood bark from Keteleeria evelyniana, Pinus yunnanensis and Pinus armandii in Yunnan Province

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

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