Silicone Spandrel Glass Coatings: Mitigating Glass Breakage Risk from Thermal and Other Stresses

Curtain wall design commonly uses insulating glass units for vision and spandrel glazing to provide better visual harmonization of building façade glass. Risks with this design approach include higher thermal stresses, especially when low-emissivity coatings are used on insulating glass units in sp...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Chris Fronsoe, Timothy Krytenberg, Kris Vockler, John Swanson, Lawrence Carbary, Chris Barry, Stephane Hoffman, George Torok, Scott Norville, Samir Blanchet
Formato:	article
Lenguaje:	EN
Publicado:	Challenging Glass Conference 2018
Materias:	Glass Strength Silicone Coatings Insulating Glass Units Glass Weakness Ceramic Enamel Frit Architectural Glass Clay industries. Ceramics. Glass TP785-869
Acceso en línea:	https://doaj.org/article/b37b449091c44ac68da8f045890a208c
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:b37b449091c44ac68da8f045890a208c
record_format	dspace
spelling	oai:doaj.org-article:b37b449091c44ac68da8f045890a208c2021-12-04T05:12:20ZSilicone Spandrel Glass Coatings: Mitigating Glass Breakage Risk from Thermal and Other Stresses10.7480/cgc.6.21322589-8019https://doaj.org/article/b37b449091c44ac68da8f045890a208c2018-05-01T00:00:00Zhttps://proceedings.challengingglass.com/index.php/cgc/article/view/103https://doaj.org/toc/2589-8019 Curtain wall design commonly uses insulating glass units for vision and spandrel glazing to provide better visual harmonization of building façade glass. Risks with this design approach include higher thermal stresses, especially when low-emissivity coatings are used on insulating glass units in spandrel areas. Ceramic enamel frit – commonly used to opacify spandrel glass – is known to induce a bending strength reduction of up to 50%. The ability of ceramic enamel frit coated glass to resist thermal stress is similarly reduced. Multiple incidences of thermal stress related fracture have occurred with heat-strengthened, ceramic enamel frit opacified spandrel glass. An increased chance of spontaneous breakage, by nickel sulfide inclusions, may occur if ceramic enamel frit opacified spandrel glass is fully-tempered to withstand the thermal stresses that it is exposed to. Silicone spandrel glass coatings have been examined as a solution to prevent the strength reduction in heat-treated glass when ceramic enamel frit is applied as an opacifier. Four-point bending tests were used to investigate the flexural strength of coated heat-strengthened and fully-tempered glass. Ball drop testing was used to investigate the impact resistance of coated fully-tempered glass. Test data shows silicone coatings have no adverse effect on the flexural strength or impact resistance of the substrate and, in some instances, improve it. Therefore, silicone opacifiers do not reduce the resistance to thermal stress of heat-treated glass. These coatings also provide fallout protection in accordance with ASTM C1048 (ASTM, 2012). This suggests using a silicone opacifier on heat-treated spandrel glass could greatly reduce the risk of fracture resulting from thermally induced tensile stress, flexural stress, and impact related glass breakage in addition to reducing risk of injury from fallout if breakage occurs. Chris FronsoeTimothy KrytenbergKris VocklerJohn SwansonLawrence CarbaryChris BarryStephane HoffmanGeorge TorokScott NorvilleSamir BlanchetChallenging Glass ConferencearticleGlass StrengthSilicone CoatingsInsulating Glass UnitsGlass WeaknessCeramic Enamel FritArchitectural GlassClay industries. Ceramics. GlassTP785-869ENChallenging Glass Conference Proceedings, Vol 6, Iss 1 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Glass Strength Silicone Coatings Insulating Glass Units Glass Weakness Ceramic Enamel Frit Architectural Glass Clay industries. Ceramics. Glass TP785-869
spellingShingle	Glass Strength Silicone Coatings Insulating Glass Units Glass Weakness Ceramic Enamel Frit Architectural Glass Clay industries. Ceramics. Glass TP785-869 Chris Fronsoe Timothy Krytenberg Kris Vockler John Swanson Lawrence Carbary Chris Barry Stephane Hoffman George Torok Scott Norville Samir Blanchet Silicone Spandrel Glass Coatings: Mitigating Glass Breakage Risk from Thermal and Other Stresses
description	Curtain wall design commonly uses insulating glass units for vision and spandrel glazing to provide better visual harmonization of building façade glass. Risks with this design approach include higher thermal stresses, especially when low-emissivity coatings are used on insulating glass units in spandrel areas. Ceramic enamel frit – commonly used to opacify spandrel glass – is known to induce a bending strength reduction of up to 50%. The ability of ceramic enamel frit coated glass to resist thermal stress is similarly reduced. Multiple incidences of thermal stress related fracture have occurred with heat-strengthened, ceramic enamel frit opacified spandrel glass. An increased chance of spontaneous breakage, by nickel sulfide inclusions, may occur if ceramic enamel frit opacified spandrel glass is fully-tempered to withstand the thermal stresses that it is exposed to. Silicone spandrel glass coatings have been examined as a solution to prevent the strength reduction in heat-treated glass when ceramic enamel frit is applied as an opacifier. Four-point bending tests were used to investigate the flexural strength of coated heat-strengthened and fully-tempered glass. Ball drop testing was used to investigate the impact resistance of coated fully-tempered glass. Test data shows silicone coatings have no adverse effect on the flexural strength or impact resistance of the substrate and, in some instances, improve it. Therefore, silicone opacifiers do not reduce the resistance to thermal stress of heat-treated glass. These coatings also provide fallout protection in accordance with ASTM C1048 (ASTM, 2012). This suggests using a silicone opacifier on heat-treated spandrel glass could greatly reduce the risk of fracture resulting from thermally induced tensile stress, flexural stress, and impact related glass breakage in addition to reducing risk of injury from fallout if breakage occurs.
format	article
author	Chris Fronsoe Timothy Krytenberg Kris Vockler John Swanson Lawrence Carbary Chris Barry Stephane Hoffman George Torok Scott Norville Samir Blanchet
author_facet	Chris Fronsoe Timothy Krytenberg Kris Vockler John Swanson Lawrence Carbary Chris Barry Stephane Hoffman George Torok Scott Norville Samir Blanchet
author_sort	Chris Fronsoe
title	Silicone Spandrel Glass Coatings: Mitigating Glass Breakage Risk from Thermal and Other Stresses
title_short	Silicone Spandrel Glass Coatings: Mitigating Glass Breakage Risk from Thermal and Other Stresses
title_full	Silicone Spandrel Glass Coatings: Mitigating Glass Breakage Risk from Thermal and Other Stresses
title_fullStr	Silicone Spandrel Glass Coatings: Mitigating Glass Breakage Risk from Thermal and Other Stresses
title_full_unstemmed	Silicone Spandrel Glass Coatings: Mitigating Glass Breakage Risk from Thermal and Other Stresses
title_sort	silicone spandrel glass coatings: mitigating glass breakage risk from thermal and other stresses
publisher	Challenging Glass Conference
publishDate	2018
url	https://doaj.org/article/b37b449091c44ac68da8f045890a208c
work_keys_str_mv	AT chrisfronsoe siliconespandrelglasscoatingsmitigatingglassbreakageriskfromthermalandotherstresses AT timothykrytenberg siliconespandrelglasscoatingsmitigatingglassbreakageriskfromthermalandotherstresses AT krisvockler siliconespandrelglasscoatingsmitigatingglassbreakageriskfromthermalandotherstresses AT johnswanson siliconespandrelglasscoatingsmitigatingglassbreakageriskfromthermalandotherstresses AT lawrencecarbary siliconespandrelglasscoatingsmitigatingglassbreakageriskfromthermalandotherstresses AT chrisbarry siliconespandrelglasscoatingsmitigatingglassbreakageriskfromthermalandotherstresses AT stephanehoffman siliconespandrelglasscoatingsmitigatingglassbreakageriskfromthermalandotherstresses AT georgetorok siliconespandrelglasscoatingsmitigatingglassbreakageriskfromthermalandotherstresses AT scottnorville siliconespandrelglasscoatingsmitigatingglassbreakageriskfromthermalandotherstresses AT samirblanchet siliconespandrelglasscoatingsmitigatingglassbreakageriskfromthermalandotherstresses
_version_	1718372874529538048

Silicone Spandrel Glass Coatings: Mitigating Glass Breakage Risk from Thermal and Other Stresses

Ejemplares similares