Water absorption of expanded polystyrene boards

Gnip, Ivan; Keršulis, V.; Vėjelis, Sigitas; Vaitkus, Saulius

doi:10.1016/j.polymertesting.2006.04.002

Cited by 33 publications

(15 citation statements)

References 6 publications

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“…Thin (1 mm) layer of the PS‐nanofiber sheet can be adhered to the existing wall and covered with a thin layer of the conventional building material, making a sandwich similar to the one described here. According to PS hydrophobicity (contact angle of the water drop deposited on the PS‐nanofiber sheet surface was measured as high as 87°) and to the literature results, we also expect that moisture adsorption in the pores will not be higher than found for expanded PS boards (3.2%, for 28 days of immersion) . PS is an inert polymer, which is stable to microorganisms .…”

Section: Resultsmentioning

confidence: 74%

“…According to PS hydrophobicity (contact angle of the water drop deposited on the PS-nanofiber sheet surface was measured as high as 87 • ) and to the literature results, we also expect that moisture adsorption in the pores will not be higher than found for expanded PS boards (3.2%, for 28 days of immersion). 66 PS is an inert polymer, which is stable to microorganisms. 67 We expect no effect of thin PS-nanofiber sheet layer on the ancient building materials.…”

Section: Heat Transfermentioning

confidence: 99%

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Polystyrene nanofibers for nonwoven porous building insulation materials

Datsyuk

Trotsenko

Peikert³

et al. 2019

Engineering Reports

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The building industry makes a great effort to reduce energy consumption. The use of nanotechnology is one of the approaches to surpassing the properties of conventional insulation materials. In this work, an industrial cost‐effective method to manufacture highly porous materials with excellent thermal insulation properties is described. The materials are prepared from polystyrene recovered from the building sector and electrospun as nanofiber‐based sheets. Varying electrospinning parameters allow controlling the morphology of the produced materials. The materials are obtained with differences in interfiber and inner‐fiber porosity and morphology. The thermal conductivity of the freestanding and compressed materials is evaluated. Those differences affect the insulation performance: the materials with higher interfiber porosity show better thermal insulation in the freestanding state. An increase of the inner‐fiber porosity leads to better insulation in the compressed samples. Insertion of carbon nanomaterials reduces the effects of the infrared Radiation. Nanofiber‐based insulation materials from the recycled expanded polystyrene (EPS) show thermal conductivity values of 20 to 25 mW/mK (ie, 20% to 30% below the thermal conductivity of the commercial EPS). The effect of integrating polystyrene nanofiber sheets into conventional wall‐building materials is also investigated in terms of thermal insulation. The nanofiber insulation sheets are sandwiched between two pieces of the building materials resulting in a drastic increase of the insulation effect. The materials have a great potential in using, for example, as thermal insulation for the restoration of historic buildings in the narrow central parts of the old towns.

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Section: Resultsmentioning

confidence: 74%

Section: Heat Transfermentioning

confidence: 99%

Polystyrene nanofibers for nonwoven porous building insulation materials

Datsyuk

Trotsenko

Peikert³

et al. 2019

Engineering Reports

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“…Ta jednak ciągła aktywność przegrody i brak stabilizacji higrotermicznej przekłada się bezpośrednio na trwałość całej przegrody i jej poszczególnych warstw. Badania przedstawione w pracach [2,9] wykazały, że w przypadku długotrwałego zawilgocenia styropianu, obserwowany jest brak spójności i wyodrębnianie się poszczególnych ziaren. W przypadku betonów komórkowych o niskiej gęstości, proces utraty parametrów mechanicznych na skutek zawilgocenia jest znacznie szybszy.…”

Section: Wnioski Końcoweunclassified

Analiza Stanu Wilgotnościowego Ścian Z Cegły Z Izolacją Cieplną Od Wewnątrz

et al. 2016

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Tomasz STEIDL ANALIZA STANU WILGOTNOŚCIOWEGO ŚCIAN Z CEGŁY Z IZOLACJĄ CIEPLNĄ OD WEWNĄTRZAutorzy podjęli próbę analizy stanu wilgotnościowego ścian z izolacją cieplną od wewnątrz wykonaną z dwóch materiałów izolacyjnych o odmiennych cechach fizycznych. Ich celem jest uzyskanie odpowiedzi na pytania: czy rodzaj materiału izolacyjnego w systemie ociepleń od wewnątrz ścian z cegły wpływa na zawilgocenie warstw przegrody, których i w jakim stopniu? jak zastosowany materiał izolacyjny będzie wpływał na proces wysychania przegrody i reagował na zmienne warunki cieplno-wilgotnościowe otaczających środowisk? Analizowaną ścianą był mur z cegły o grubości 38cm. Docieplony został materiałem izolacyjnym o grubości 10cm w wariancie pierwszym: polistyren ekspandowany (W_1), w wariancie drugim: lekki beton komórkowy (W_2). Ze wstępnych analiz wykonanych w oparciu o założenia normy PN ISO 13788 wynika, że obie przegrody zostały zaprojektowane prawidłowo pod względem uniknięcia rozwoju pleśni na powierzchni wewnętrz-nej. Dla wariantu drugiego obserwuje się jednak wewnętrzną kondensację pary wodnej ( na styku materiału izolacyjnego oraz ściany), oraz że kondensat nie wyparuje w miesiącach letnich. Szczegółową analizę zachowania się przegrody wykonano w programie WUFI zakładając trzyletni okres pomiarowy (norma PN ISO 13788 pozwala na ocenę tylko dla jednego roku). Uzyskane wyniki wykazują przyrost zawilgocenia w obu wariantach dociepleniowych. W zależności od rodzaju użytego materiału izolacyjnego zmienia się poziom zawartości wilgoci dla poszczególnych warstw i dla wybranych kształtuje się ona na stałym poziomie (mur z cegły) lub charakteryzuje się stałą tendencja zmian (lekki beton komórkowy).

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“…The use of some of these materials have not met the goals of sustainability in building construction due to their high cost of purchase, difficulty in obtaining material due to its limited availability, poor performance and high level of maintenance. These issues have led to the invention of alternative building materials among which are improved plastic material called Expanded Polystyrene (EPS) which offered new options to access a material that is economical and produces structural as well as aesthetics efficiency [1] [2].…”

Section: Introductionmentioning

confidence: 99%

Identifying Factors Hindering the Adoption of Expanded Polystyrene for Building Construction in Akure, Nigeria

Momoh¹,

Folorunso²

2018

MSCE

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Housing provision has become a global issue as the need for affordable housing kept increasing in various communities especially in Akure, Nigeria. This has emerged due to various economic, socio-cultural and environmental factors which has increased pressure on conventional building materials thereby leading to the invention of alternative building materials. This paper looks at the barriers to the adoption of expanded polystyrene (EPS) for building construction in Akure, Nigeria. The methodology adopted elicited information through structured questionnaire which assessed the socio-economic characteristics of the respondents, their level of awareness of EPS and its application in building construction, the rate at which they specify EPS for designs and construction and the hindrances to its adoption for building construction. A total of 60 questionnaires were administered on the architects in practice and in the academia environment but 45 were retrieved. This was the bases to which the conclusion of this research was made. The outcome of the research shows that lack of awareness is a key hindrance to the adoption of EPS for construction as most architects in Akure do not know much about expanded polystyrene, thereby, cannot fully decipher its qualities and/or suitability for construction. As such, most questions pertaining the durability, cost implication or client's preference could not be answered by the architects since their knowledge on the subject matter is minimal. However, those who knows about EPS confirms its flexibility, quick construction time and its environmental friendliness but stated that EPS is not readily available like other conventional materials. As such, their specification always goes towards the available materials.

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Water absorption of expanded polystyrene boards

Cited by 33 publications

References 6 publications

Polystyrene nanofibers for nonwoven porous building insulation materials

Polystyrene nanofibers for nonwoven porous building insulation materials

Analiza Stanu Wilgotnościowego Ścian Z Cegły Z Izolacją Cieplną Od Wewnątrz

Identifying Factors Hindering the Adoption of Expanded Polystyrene for Building Construction in Akure, Nigeria

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