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Now showing items 11-20 of 47
Autotrophic Denitrification Of Groundwater In A Granular Sulfur-packed Up-flow Reactor
(Civil & Environmental Engineering, 2007-09-17)
Autotrophic denitrification is an effective treatment technique for nitrate removal from groundwater. Six basic elements are required for the growth of autotrophic denitrifiers: (1) electron donor, (2) electron acceptor, ...
Effects Of Water-cement Ratio On Deep Mixing Treated Expansive Clay Characteristics
(Civil & Environmental Engineering, 2007-08-23)
The structures built on the unstabilized expansive soils are subjected to distress due to swell shrink behavior due to seasonal fluctuations. Medium stiff expansive clays with moderate and high PI were collected from two ...
Comparison Of Clinoptilolite With Gravel In A Recirculating Course Media Biofilter Treating Simulated Septic Tank Effluent
(Civil & Environmental Engineering, 2007-08-23)
The main objective of the pilot scale study was to compare the performance of recirulating clinoptilolite biofilter with course gravel biofilter used to treat simulated septic tank effluent by simultaneous nitrification ...
Assessment Of Soil-water Retention Properties Of Lime And Cement Treated Clays
(Civil & Environmental Engineering, 2007-08-23)
The soil-water characteristic curve (SWCC) of unsaturated soils has considerable importance in the analysis of geotechnical engineering problems involving soils that remain under partially saturated conditions throughout ...
A weighted residual parabolic acceleration time integration method for problems in structural dynamics
(Walter de Gruyter GmbH, 2007)
In the proposed method, the variation of displacement in each time step
is assumed to be a fourth order polynomial in time and its five unknown coefficients are
calculated based on: two initial conditions from the previous ...
General Response Of Kneading-compacted Unsaturated Silty Sand Under Drained And Undrained True Triaxial Testing
(Civil & Environmental Engineering, 2007-08-23)
A comprehensive series of 36 drained and 36 undrained true triaxial tests was accomplished to investigate the stress-strain-strength behaviour of kneading-compacted unsaturated silty sand (SP-SM) under multi-axial stress ...
Statistical Analysis Of Compressive Strength Of Clay Brick Masonry Prisms
(Civil & Environmental Engineering, 2007-08-23)
The Specification for Masonry Structures section of the current governing masonry design document in the U.S., reported by the Masonry Standards Joint Committee (MSJC), contains tables that can be used to determine the ...
Evaluation Of Texas Cone Penetrometer Test To Predict Undrained Shear Strength Of Clays
(Civil & Environmental Engineering, 2007-08-23)
The cone penetration test used in Texas is termed as Texas cone penetrometer (TCP), which works on dynamic principles similar to those of SPT, i.e. a hammer is used to drive the cone device for a preset depth of penetration ...
Development Of Finite Element Method-based Model Equations For Hollow Tapered Poles
(Civil & Environmental Engineering, 2007-08-23)
This study presents the development of three-parameter load-deflection models for steel and FRP poles commonly used to support closed circuit television cameras. An experimental investigation is carried out to obtain static ...
Nonlinear Finite Element Model Analysis Of Human Accommodation Lens
(Civil & Environmental Engineering, 2007-08-23)
The crystalline human lens is modeled by using the finite element software, ABAQUS/CAE Version 6.5-1 as an axisymmetric shell to study the optical power and displacement of anterior and posterior poles induced due to zonule ...