نتایج جستجو برای: permeability coefficient

تعداد نتایج: 217403  

Journal: :Advances in Materials Science and Engineering 2014

Journal: :civil engineering infrastructures journal 0
seyed esmaeil mousavi civil engineering department, college of engineering, universiti tenaga nasional, ikram-uniten road, 43000 kajang, selangor, malaysia leong sing - wong college of graduate studies, universiti tenaga nasional, ikram-uniten road, 43000 kajang, selangor, malaysia

the present paper investigates the influence of stabilization with cement, peat ash, and silica sand on permeability coefficient (kv) of compacted clay, using a novel approach to stabilize the clay with peat ash as a supplementary material of cement in the compacted and stabilized soil. in order to assess the mentioned influence, test specimens of both untreated and stabilized soil have been te...

The present paper investigates the influence of stabilization with cement, peat ash, and silica sand on permeability coefficient (kv) of compacted clay, using a novel approach to stabilize the clay with peat ash as a supplementary material of cement in the compacted and stabilized soil. In order to assess the mentioned influence, test specimens of both untreated and stabilized soil have been te...

2012
Baoguo Han Zhengxian Yang Xianming Shi

This paper preliminarily investigates the general transport properties (i.e., water sorptivity, water permeability, and gas permeability) of carbon-nanotube/cement composites. Carboxyl multi-walled carbon nanotubes (MWNTs) are dispersed into cement mortar to fabricate the carbon nanotubes (CNTs) reinforced cement-based composites by applying ultrasonic energy in combination with the use of surf...

Journal: :The Journal of General Physiology 1980
E Orbach A Finkelstein

The permeability of lecithin bilayer membranes to nonelectrolytes is in reasonable agreement with Overton's rule. The is, Pd alpha DKhc, where/Pd is the permeability coefficient of a solute through the bilayer, Khc is its hydrocarbon:water partition coefficient, and D is its diffusion coefficient in bulk hydrocarbon. The partition coefficients are by far the major determinants of the relative m...

Journal: :Journal of medicinal chemistry 1980
V A Levin

The rat brain capillary permeability coefficient was determined for 27 compounds. The relationship of permeability to octanol/water partition coefficient and molecular weight was found to be predictable for drugs with molecular weights less than 400.

Journal: :Investigative ophthalmology & visual science 2008
Owen A Anderson Timothy L Jackson Jasmin K Singh Ali A Hussain John Marshall

PURPOSE To quantify the permeability coefficient of albumin across human sclera and to assess topographical and age-related variation. METHODS Equatorial superotemporal scleral tissue from 15 donor eyes (mean age 60 years; range 39-84) was mounted in a modified Ussing chamber. Additional tissue was taken from the anterior and posterior superotemporal regions of six eyes, and equatorial supero...

2008
Ashok Kumar Gupta

In this paper a concept of mean particle size and size factor is presented and an attempt is made to relate the coefficient of permeability with mean particle size, keeping in view the optimum moisture content and maximum dry density. The particle size distribution has a marked impact on the coefficient of permeability. The mean particle size and the size factor can be found out from the gradat...

Porous concrete is a mixture of cement and water that may contain fine grains, which play a role in water transfer and permeability. Porous concrete can act as a drain to pass rainwater and recharge groundwater. In this study, 25%, 50%, 75%, and 100% zeolite were used to replace the coarse aggregates in porous concrete. The effects of the zeolite on the compressive strength, permeability coeffi...

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