Water vapor diffusion in asphalt mixtures under different relative humidity differentials

2017 ◽  
Vol 136 ◽  
pp. 126-138 ◽  
Author(s):  
Rong Luo ◽  
Tingting Huang ◽  
Derun Zhang ◽  
Robert L. Lytton
Keyword(s):  
Water Vapor ◽  
Relative Humidity ◽  
Asphalt Mixtures ◽  
Vapor Diffusion ◽  
Water Vapor Diffusion

WATER VAPOR TRANSPORT IN PLASTERS CONTAINING SUPERABSORBENT POLYMERS

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Jan Fořt ◽  
Martin Mildner ◽  
Petr Hotěk ◽  
Robert Černý
Keyword(s):  
Water Vapor ◽  
Relative Humidity ◽  
Transport Properties ◽  
Building Design ◽  
Vapor Transport ◽  
Water Vapor Transport ◽  
Diffusion Resistance ◽  
Vapor Diffusion ◽  
Water Vapor Diffusion

A proper characterization of material properties represents an important step towards an efficient building design. Considering the present issues in the construction sector, moisture loads pose a risk not only to increased material deterioration but also to the health of building inhabitants. In this paper, modified plaster mixtures with superabsorbent admixture are designed in order to improve passive moderation of finishing layers against varying humidity conditions. The relationship between the amount of applied superabsorbent admixture and resulting water vapor transport properties is identified and the influence of temperature on water vapor transport is analyzed. The steady-state cup method is used for the determination of water vapor transport properties, namely the water vapor diffusion permeability, water vapor diffusion coefficient and water vapor diffusion resistance factor. The obtained data show temperature as a very significant factor affecting water vapor transport in the analyzed plasters. Considering the dry-cup method arrangement, relative humidity probes should be used for monitoring relative humidity under the sealed sample for a sufficiently precise determination of water vapor pressure gradient.

Measurement and Modeling of Water-Vapor Diffusion in Elastomers with Impact in Humidity and Vacuum Measurements

2013 ◽  
Vol 34 (3) ◽  
pp. 412-423 ◽  
Author(s):  
Janez Šetina ◽  
Makfir Sefa ◽  
Bojan Erjavec ◽  
Domen Hudoklin
Keyword(s):  
Water Vapor ◽  
Vapor Diffusion ◽  
Water Vapor Diffusion

Lime Plasters Containing Waste Ceramic Powder as Partial Replacement of Siliceous Aggregates

2014 ◽  
Vol 1035 ◽  
pp. 77-82 ◽  
Author(s):  
Eva Vejmelková ◽  
Monika Čáchová ◽  
Dana Koňáková ◽  
Pavel Reiterman ◽  
Robert Černý
Keyword(s):  
Water Vapor ◽  
Bending Strength ◽  
Ceramic Powder ◽  
Point Of View ◽  
Partial Replacement ◽  
Diffusion Resistance ◽  
Vapor Diffusion ◽  
Water Vapor Diffusion ◽  
Hollow Brick ◽  
Lime Plaster

Waste materials are utilized with an increasing frequency in the building industry, during the last decades. The motivation is both environmental and economical. In this paper, waste ceramic powder produced at the grinding of hollow brick blocks used in precise-walling technologies, is applied as a partial replacement of siliceous aggregates of lime plasters. The designed plaster mixes are analyzed from the point of view of their basic physical, mechanical, hygric and thermal properties. The bulk density, matrix density, open porosity, compressive strength, bending strength, water vapor diffusion permeability, water vapor diffusion coefficient, water vapor diffusion resistance factor, thermal conductivity and specific heat capacity are the investigated parameters. A reference lime plaster is analyzed as well, for the sake of comparison. Experimental results show a remarkable enhancement of mechanical properties of the plasters with the increasing dosage of ceramic powder. Moreover, the thermal insulation properties are improved and the water vapor diffusion capability of the plasters with ceramic powder increases.

scholarly journals The potential use of organosilane water soluble nanomaterials as water vapor diffusion retarders for wood

2012 ◽  
Vol 14 (1) ◽  
pp. 43-52 ◽  
Author(s):  
Hadi Gholamiyan ◽  
Asghar Tarmian ◽  
Kazem Doost Hosseini ◽  
Mohammad Azadfallah
Keyword(s):  
Water Vapor ◽  
Water Soluble ◽  
Vapor Diffusion ◽  
Water Vapor Diffusion ◽  
Potential Use
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