Study on Surface Air Permeability of Concrete

2018 ◽  
Vol 56 (5) ◽  
pp. 466-470
Author(s):  
A. Nonaka ◽  
N. Yuasa
Keyword(s):  
Air Permeability

ACA Permi Online Air Permeability Analyzer and RoQ Roll Hardness Profiler

2018 ◽  
Vol 72 (6) ◽  
pp. 633-636
Author(s):  
Yohei Suzuki
Keyword(s):  
Air Permeability

Sunlight exposure: the effects on the performance of paragliding fabric

2018 ◽  
Vol 69 (05) ◽  
pp. 381-389
Author(s):  
MENGÜÇ GAMZE SÜPÜREN ◽  
TEMEL EMRAH ◽  
BOZDOĞAN FARUK
Keyword(s):  
Mechanical Properties ◽  
Aging Process ◽  
Air Permeability ◽  
Sunlight Exposure ◽  
Test Results ◽  
Coating Materials ◽  
Strength Tests ◽  
Before And After ◽  
The Relationship ◽  
Dark Blue

This study was designed to explore the relationship between sunlight exposure and the mechanical properties of paragliding fabrics which have different colors, densities, yarn counts, and coating materials. This study exposed 5 different colors of paragliding fabrics (red, turquoise, dark blue, orange, and white) to intense sunlight for 150 hours during the summer from 9:00 a.m. to 3:00 p.m. for 5 days a week for 5 weeks. Before and after the UV radiation aging process, the air permeability, tensile strength, tear strength, and bursting strength tests were performed. Test results were also evaluated using statistical methods. According to the results, the fading of the turquoise fabric was found to be the highest among the studied fabrics. It was determined that there is a significant decrease in the mechanical properties of the fabrics after sunlight exposure. After aging, the fabrics become considerably weaker in the case of mechanical properties due to the degradation in both the dyestuff and macromolecular structure of the fiber

scholarly journals Prediction of air permeability coefficient and water-vapor resistance of 3D textile layer

2021 ◽  
pp. 1-9
Author(s):  
Aušra Gadeikytė ◽  
Aušra Abraitienė ◽  
Rimantas Barauskas
Keyword(s):  
Water Vapor ◽  
Permeability Coefficient ◽  
Air Permeability

scholarly journals Thermal and breathability management of microencapsulated phase change material (MPCM) incorporated jute fabric

2021 ◽  
Vol 16 ◽  
pp. 155892502110295
Author(s):  
Abdus Shahid ◽  
Solaiman Miah ◽  
Abdur Rahim
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Thermal Fluctuation ◽  
Water Repellency ◽  
Air Permeability ◽  
Jute Fabric ◽  
Moisture Management ◽  
Microencapsulated Phase Change Material ◽  
Fabric Surface ◽  
Change Material

Jute bags are widely used to carry food grains and other materials that may be prone to quality deterioration due to thermal fluctuation. Thermal and moisture properties play a significant role in the packaging materials in the form of a container. This study deals with the effect of microencapsulated phase change material (MPCM) with hydrophobic binder on thermal and moisture management properties of jute fabric. Jute fabric was treated with MPCM by pad-dry-cure method. The treated sample was characterized by thermogravimetric analysis (TGA), differential scanning colorimeter (DSC), scanning electron microscope (SEM), moisture management tester (MMT), and air permeability tester. The results revealed that MPCM treated jute fabric shows greater thermal stability and heat absorption ability of 10.58 J/g while changing from solid to liquid phase. The SEM image ensures even distribution of MPCMs on fabric surface and surface roughness was also observed using image processing software. The air permeability was found to decrease whereas the water repellency enhanced in the developed sample.

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