نتایج جستجو برای: swelling and shrinkage potential

تعداد نتایج: 16926819  

Journal: :تحقیقات آب و خاک ایران 0
مریم ابراهیمی رستمی حسن رحیمی

expansible soils are those which will suffer considerable swelling and volume change when subjected to water. the resulting swelling pressure may cause complete destruction of such light structures as irrigation canal linings, floor slabs, etc. based upon previous investigations, swelling of clayey soils has been blamed for failure of many irrigation canals in iran and in other countries of the...

Journal: :مهندسی سازه 0
ایمان عشایری شهاب الدین یثربی

expansive behavior is usually observed in soils, which contain fractions of clay minerals in their composition. water absorption of clay particles and change of natural water content of soil up to plastic limit and down to shrinkage limit will cause significant volume change in expansive soils and will result in severe damages to the structures, buildings and foundations. swelling potential is ...

Journal: :تحقیقات آب و خاک ایران 0
امین سلطانی دانشجوی کارشناسی ارشد سازه‏ های آبی گروه مهندسی آبیاری و آبادانی دانشگاه تهران علی رئیسی استبرق دانشیار گروه مهندسی آبیاری و آبادانی دانشگاه تهران جمال عبدالهی مربی گروه مهندسی آبیاری و آبادانی دانشگاه تهران

expansive soils are considered a worldwide problem as they cause extensive damage tocivil engineering structures. an important characteristic of expansive soils is theirsusceptibility to volume change due to the phenomenon of wetting and drying. this paperpresets the effect of pore water quality on the swelling and shrinkage behavior of anexpansive soil during wetting and drying cycles. thirty ...

Journal: Desert 2015

Expansive soils can be found in many parts of the world particularly in arid and semi-arid regions. These soilspose a significant hazard to civil engineering structures due to its high swelling and shrinkage potential. This paperpresents the results of an experimental program developed to investigate the effect of cyclic drying and wetting on theswelling potential of expansive soils with variou...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه بیرجند - دانشکده ادبیات و علوم انسانی 1392

in new management approaches, in the organizations with inflexible structure, existing of red tapes and interruptions caused by limitations and also non-compliance with environmental changes, create demotivation among staff. with regard to the influence of job motivational potential and its relationship to the type of organizational structure( enabling and dissuasive), the goal of this research...

Journal: :Physics in medicine and biology 2008
Q Wang Y P Zheng G Leung W L Lam X Guo H B Lu L Qin A F T Mak

Swelling behavior is an electrochemical mechanical property of articular cartilage. It plays an important role in weight bearing and joint lubrication. In this study, the altered transient and inhomogeneous swelling behavior of the degenerated articular cartilage was observed and quantified in situ using ultrasound. Three groups of bovine patellar articular cartilage samples (n = 10 x 3) were o...

Journal: :desert 2015
amin soltani ali raeesi estabragh

expansive soils can be found in many parts of the world particularly in arid and semi-arid regions. these soilspose a significant hazard to civil engineering structures due to its high swelling and shrinkage potential. this paperpresents the results of an experimental program developed to investigate the effect of cyclic drying and wetting on theswelling potential of expansive soils with variou...

2004
Lawrence Awoyemi

The reversibility of wood shrinkage through swelling of birch (Betula pubescens) and Scots pine (Pinus sylvestris L.) as a measure of their response to changing conditions of adsorption and desorption during service was determined. Virtually all dimensional changes that occurred in the form of shrinkage during drying at both conventional and high temperatures were recovered during swelling in b...

Journal: :تحقیقات آب و خاک ایران 0
مهرداد مقدس دانشجوی دکتری سازه های آبی گروه آبیاری و آبادانی دانشکدة کشاورزی و منابع طبیعی دانشگاه تهران علی رئیسی استبرق استادیار گروه مهندسی آبیاری و آبادانی دانشکدة کشاورزی و منابع طبیعی دانشگاه تهران جمال عبداللهی مربی گروه مهندسی آبیاری و آبادانی دانشکدة کشاورزی و منابع طبیعی دانشگاه تهران

expansive soils are of the kind the volume of which will be changed to extremes by being exposed to varying conditions of moisture. this volume change is a serious menace to structures built on these types of soils. throughout the present research the potential of volume change in these soils was investigated when exposed to the phenomenon of wetting and drying. for the purpose, samples of a st...

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