Results 71 to 80 of about 4,002 (161)

Development and Preliminary Evaluation of an Improvised Tension Disc Permeameter for Determining Unsaturated Soil Hydraulic Properties [PDF]

Philippine E-Journal for Applied Research and Development, 2016
An improvised tension disc permeameter for determining the unsaturated hydraulic properties of soil was fabricated using low-cost and locally-available materials.
Maurice A. Duka, Charles John C. Gunay, Rosa B. De Los Reyes, Joan Cecilia C. Casila, Jeffrey A. Gonzales, Erwin C. Escobar   +5 more
doaj  

Spatial variability of water repellency in pine forest soil

Soil and Water Research, 2008
The variability of water repellency of pine-forest arenic regosols and its influence on infiltration processes were measured in southwest Slovakia.
Tomáš Orfánus, Zoltán Bedrna, Ľubomír Lichner, Paul D. Hallett, Karol Kňava, Michal Sebíň   +5 more
doaj   +1 more source

Activation of low grade clays at high temperatures

Revista Ingeniería de Construcción, 2010
This paper introduces a proposal to produce artificial pozzolans by means of activation of low grade clays, as an alternative to metakaolin production. Basically the work considered clay mineral enriched soils, mainly kaolin.
Rancés Castillo, Rodrigo Fernández, Mathieu Antoni, Karen Scrivener, Adrián Alujas, José F. Martirena   +5 more
doaj  

Note on the sorptivity for mixed saturated-unsaturated flow [PDF]

An approximate, but general, analytical result for the sorptivity of a soil is derived. It provides an estimate of the sorptivity when ponding occurs at the soil surface, or when the diffusivity is infinite at saturation.
Haverkamp, R., Parlange, J.-Y., Barry, D. A., Parlange, M. B.   +3 more
core   +1 more source

Comprehensive Investigation of the Mechanical and Durability Properties of High-Performance Concretes Containing CSA Cement

Applied Sciences
This study presents a comprehensive experimental evaluation of high-performance concretes incorporating calcium sulfoaluminate (CSA) cement as a partial replacement for ordinary Portland cement (OPC).
Roman Jaskulski, Daria Jóźwiak-Niedźwiedzka, Maciej Banach   +2 more
doaj   +1 more source

Performance of Date Palm Ash as a Cementitious Material by Evaluating Strength, Durability, and Characterization

Buildings, 2018
Cement manufacturing is indeed a major contributor to global warming that involves energy-intensive production processes along with emitting huge greenhouse gasses into the atmosphere.
Muhammad Nasir, Walid Al-Kutti
doaj   +1 more source

Reduction of concrete sorptivity with age through carbonation

, 2013
Ordinary Portland cement (OPC) concrete specimens that had been air - dried for 3.5 years were found to have an increase in weight and reduction in sorptivity, with weight and sorptivity changes being greater for specimens with higher original ...
Dias, WPS
core   +1 more source

Estimation of Soil Hydraulic Properties Curve through Beerkan Infiltration Experiment Algorithms

علوم آب و خاک, 2019
Nowadays, the Beerkan computational algorithms (BESTslope and BESTsteday) are known as the suitable indirect methods for estimating soil saturated hydraulic conductivity (Ks) and sorptivity (S), as well as the scale parameter (hg) in van Genuchten soil ...
T. Ahmady, M. Delbari, P. Afrasiab
doaj  

Spatial patterns of wetting characteristics in grassland sandy soil

Journal of Hydrology and Hydromechanics, 2016
In grasslands where organic and inorganic resources are alternating at scales of individual plants, the transient character is given to certain wetting properties of soil, which then become highly variable both in space and in time.
Orfánus Tomáš, Stojkovová Dagmar, Rajkai Kálmán, Czachor Henryk, Sándor Renáta   +4 more
doaj   +1 more source

Modeling water movement in horizontal columns using fractal theory Modelagem de movimento horizontal de água no solo utilizando a teoria dos fractais

Revista Brasileira de Ciência do Solo, 2010
Fractal mathematics has been used to characterize water and solute transport in porous media and also to characterize and simulate porous media properties.
Tairone Paiva Leão, Edmund Perfect
doaj   +1 more source