Comparative performance of Polymeric Xylenol Tetrasulfide versus creosote in an AWPA E7 field stake test

Abstract: A need exists to develop new organic, environmentally benign wood preservatives for industrial applications to replace the older creosote and pentachlorophenol systems. In this study the performance of creosote at three retentions was compared to a new wood preservative candidate formulate...

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Autores principales: Nicholas,Darrel D., Rowlen,Amy, Milsted,David
Lenguaje:English
Publicado: Universidad del Bío-Bío 2021
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Acceso en línea:http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2021000100460
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spelling oai:scielo:S0718-221X20210001004602021-09-09Comparative performance of Polymeric Xylenol Tetrasulfide versus creosote in an AWPA E7 field stake testNicholas,Darrel D.Rowlen,AmyMilsted,David Creosote decay field stake test polymeric xylenol tetrasulfide termites wood preservation. Abstract: A need exists to develop new organic, environmentally benign wood preservatives for industrial applications to replace the older creosote and pentachlorophenol systems. In this study the performance of creosote at three retentions was compared to a new wood preservative candidate formulated with Polymeric Xylenol Tetrasulfide (PXTS) in an E7 AWPA field study using two sets of southern pine and yellow poplar field stakes treated with three creosote retentions or five retentions of PXTS. The stakes were installed at two test sites and evaluated after 3,5 years, 6 years, and 14 years exposure. After six years of exposure at both sites, which is double the minimum recommended exposure period of three years’ field data for AWPA submission of a proposed new preservative system, the average decay ratings data for southern pine stakes after three years exposure was not sufficient to definitively determine which system provides superior protection against decay and termite attack (Creosote at the AWPA UC4B pole retentions versus pine stakes treated with much lower PXTS levels). However, after a longer exposure time of 14 years the data conclusively shows that pine stakes treated to the utility pole AWPA UC4B creosote retention performed poorer at both sites against decay and termite degradation than pine stakes treated with 26 Kg/m3 PXTS. Similar results were obtained with the yellow poplar stakes. We conclude that: 1) much longer E7 exposure times are necessary then the minimum recommended three years in the AWPA GDA Standard for submission of new systems to definitively determine the efficacy of a proposed oil borne system compared to the efficacy of a traditional organic preservative for commercial applications, and 2) long term field PXTS performance against decay and termite deterioration is equal or greater than that obtained with creosote at about four times the PXTS retention.info:eu-repo/semantics/openAccessUniversidad del Bío-BíoMaderas. Ciencia y tecnología v.23 20212021-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2021000100460en10.4067/s0718-221x2021000100460
institution Scielo Chile
collection Scielo Chile
language English
topic Creosote
decay
field stake test
polymeric xylenol tetrasulfide
termites
wood preservation.
spellingShingle Creosote
decay
field stake test
polymeric xylenol tetrasulfide
termites
wood preservation.
Nicholas,Darrel D.
Rowlen,Amy
Milsted,David
Comparative performance of Polymeric Xylenol Tetrasulfide versus creosote in an AWPA E7 field stake test
description Abstract: A need exists to develop new organic, environmentally benign wood preservatives for industrial applications to replace the older creosote and pentachlorophenol systems. In this study the performance of creosote at three retentions was compared to a new wood preservative candidate formulated with Polymeric Xylenol Tetrasulfide (PXTS) in an E7 AWPA field study using two sets of southern pine and yellow poplar field stakes treated with three creosote retentions or five retentions of PXTS. The stakes were installed at two test sites and evaluated after 3,5 years, 6 years, and 14 years exposure. After six years of exposure at both sites, which is double the minimum recommended exposure period of three years’ field data for AWPA submission of a proposed new preservative system, the average decay ratings data for southern pine stakes after three years exposure was not sufficient to definitively determine which system provides superior protection against decay and termite attack (Creosote at the AWPA UC4B pole retentions versus pine stakes treated with much lower PXTS levels). However, after a longer exposure time of 14 years the data conclusively shows that pine stakes treated to the utility pole AWPA UC4B creosote retention performed poorer at both sites against decay and termite degradation than pine stakes treated with 26 Kg/m3 PXTS. Similar results were obtained with the yellow poplar stakes. We conclude that: 1) much longer E7 exposure times are necessary then the minimum recommended three years in the AWPA GDA Standard for submission of new systems to definitively determine the efficacy of a proposed oil borne system compared to the efficacy of a traditional organic preservative for commercial applications, and 2) long term field PXTS performance against decay and termite deterioration is equal or greater than that obtained with creosote at about four times the PXTS retention.
author Nicholas,Darrel D.
Rowlen,Amy
Milsted,David
author_facet Nicholas,Darrel D.
Rowlen,Amy
Milsted,David
author_sort Nicholas,Darrel D.
title Comparative performance of Polymeric Xylenol Tetrasulfide versus creosote in an AWPA E7 field stake test
title_short Comparative performance of Polymeric Xylenol Tetrasulfide versus creosote in an AWPA E7 field stake test
title_full Comparative performance of Polymeric Xylenol Tetrasulfide versus creosote in an AWPA E7 field stake test
title_fullStr Comparative performance of Polymeric Xylenol Tetrasulfide versus creosote in an AWPA E7 field stake test
title_full_unstemmed Comparative performance of Polymeric Xylenol Tetrasulfide versus creosote in an AWPA E7 field stake test
title_sort comparative performance of polymeric xylenol tetrasulfide versus creosote in an awpa e7 field stake test
publisher Universidad del Bío-Bío
publishDate 2021
url http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2021000100460
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AT rowlenamy comparativeperformanceofpolymericxylenoltetrasulfideversuscreosoteinanawpae7fieldstaketest
AT milsteddavid comparativeperformanceofpolymericxylenoltetrasulfideversuscreosoteinanawpae7fieldstaketest
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