Comparison of durability of treated wood using stake tests and survival analysis

Abstract The stake test is widely used to evaluate the efficacy of wood preservatives. This test monitors the deterioration level observed in treated stakes partially inserted into the ground. The results are conventionally expressed as the relationship between deterioration levels and exposure peri...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Ikuo Momohara, Haruko Sakai, Yuji Kubo
Formato:	article
Lenguaje:	EN
Publicado:	SpringerOpen 2021
Materias:	Stake test Field test Survival analysis Wood preservative Forestry SD1-669.5 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/d6a87a5a18724bbcb52daaafb4f08936
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:d6a87a5a18724bbcb52daaafb4f08936
record_format	dspace
spelling	oai:doaj.org-article:d6a87a5a18724bbcb52daaafb4f089362021-11-08T11:03:38ZComparison of durability of treated wood using stake tests and survival analysis10.1186/s10086-021-01996-21435-02111611-4663https://doaj.org/article/d6a87a5a18724bbcb52daaafb4f089362021-11-01T00:00:00Zhttps://doi.org/10.1186/s10086-021-01996-2https://doaj.org/toc/1435-0211https://doaj.org/toc/1611-4663Abstract The stake test is widely used to evaluate the efficacy of wood preservatives. This test monitors the deterioration level observed in treated stakes partially inserted into the ground. The results are conventionally expressed as the relationship between deterioration levels and exposure periods. The preservative efficacy is compared among the stake groups treated with different retention levels based on the test results; however, there is no scientific basis for the comparison. We applied survival analysis to the conventional stake test to include a scientific basis to the test. Stakes impregnated with different types and retention levels of preservatives were subjected to deterioration at two test sites for approximately 30 years. The deterioration levels were monitored according to the conventional procedure and survival analysis was applied to the monitored data. Kaplan–Meier plots of the survival probabilities against the exposure periods indicated that there is a significant difference between the durability of the stakes treated with alkylammonium chloride (AAC-1) at K2 and K3 retention levels, whereas no significant difference was observed between those at K3 and K4 retention levels. Contrastingly, emulsified copper naphthenate (NCU-E) was found to be a reliable preservative, and the stakes impregnated with NCU-E showed a significant increase in durability in accordance with preservative retention. Alkaline copper quaternary (ACQ-1) also appeared to be a reliable preservative; however, the increase in stake durability after ACQ-1 treatment differed between the test sites. These results were verified using the modified Gehan–Breslow–Wilcoxon test with Holm’s p adjusting method.Ikuo MomoharaHaruko SakaiYuji KuboSpringerOpenarticleStake testField testSurvival analysisWood preservativeForestrySD1-669.5Building constructionTH1-9745ENJournal of Wood Science, Vol 67, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Stake test Field test Survival analysis Wood preservative Forestry SD1-669.5 Building construction TH1-9745
spellingShingle	Stake test Field test Survival analysis Wood preservative Forestry SD1-669.5 Building construction TH1-9745 Ikuo Momohara Haruko Sakai Yuji Kubo Comparison of durability of treated wood using stake tests and survival analysis
description	Abstract The stake test is widely used to evaluate the efficacy of wood preservatives. This test monitors the deterioration level observed in treated stakes partially inserted into the ground. The results are conventionally expressed as the relationship between deterioration levels and exposure periods. The preservative efficacy is compared among the stake groups treated with different retention levels based on the test results; however, there is no scientific basis for the comparison. We applied survival analysis to the conventional stake test to include a scientific basis to the test. Stakes impregnated with different types and retention levels of preservatives were subjected to deterioration at two test sites for approximately 30 years. The deterioration levels were monitored according to the conventional procedure and survival analysis was applied to the monitored data. Kaplan–Meier plots of the survival probabilities against the exposure periods indicated that there is a significant difference between the durability of the stakes treated with alkylammonium chloride (AAC-1) at K2 and K3 retention levels, whereas no significant difference was observed between those at K3 and K4 retention levels. Contrastingly, emulsified copper naphthenate (NCU-E) was found to be a reliable preservative, and the stakes impregnated with NCU-E showed a significant increase in durability in accordance with preservative retention. Alkaline copper quaternary (ACQ-1) also appeared to be a reliable preservative; however, the increase in stake durability after ACQ-1 treatment differed between the test sites. These results were verified using the modified Gehan–Breslow–Wilcoxon test with Holm’s p adjusting method.
format	article
author	Ikuo Momohara Haruko Sakai Yuji Kubo
author_facet	Ikuo Momohara Haruko Sakai Yuji Kubo
author_sort	Ikuo Momohara
title	Comparison of durability of treated wood using stake tests and survival analysis
title_short	Comparison of durability of treated wood using stake tests and survival analysis
title_full	Comparison of durability of treated wood using stake tests and survival analysis
title_fullStr	Comparison of durability of treated wood using stake tests and survival analysis
title_full_unstemmed	Comparison of durability of treated wood using stake tests and survival analysis
title_sort	comparison of durability of treated wood using stake tests and survival analysis
publisher	SpringerOpen
publishDate	2021
url	https://doaj.org/article/d6a87a5a18724bbcb52daaafb4f08936
work_keys_str_mv	AT ikuomomohara comparisonofdurabilityoftreatedwoodusingstaketestsandsurvivalanalysis AT harukosakai comparisonofdurabilityoftreatedwoodusingstaketestsandsurvivalanalysis AT yujikubo comparisonofdurabilityoftreatedwoodusingstaketestsandsurvivalanalysis
_version_	1718442474784948224

Comparison of durability of treated wood using stake tests and survival analysis

Ejemplares similares