Results 51 to 60 of about 350,547 (192)

Foam used during EPB tunnelling in saturated sand, parameters determining foam consumption [PDF]

, 2012
The amount of foam injected during drilling with an EPB-shield in saturated sand is quite often based on experience and/or empiric relations. A method is presented in to calculate the amount of foam needed to create a muck with limited or no grain stress.
Bezuijen, Adam
core   +1 more source

EFFECT OF GRADING OF SANDY SOIL ON STRENGTH OF CEMENT TREATED SANDY SOIL

Doboku Gakkai Ronbunshu, 1992
セメントを安定材に用いた事前混合処理土の強度は, セメントの種類とその添加率のみならず, 処理対象土の種類, 細粒分含有率によっても変化する. 本文は, それらの原因を明らかにするため, 粒度を調整した山砂事前混合処理土の強度とその粒子間隙におけるセメント水和物の架橋状況, さらに水セメント比が変化した場合の粒度の影響を検討した. その結果, 処理対象土の粒度が, 事前混合処理土の強度に影響を及ぼすのは, 貧配合の場合に限られること, そして粒子間隙の小さいものほど, セメント水和物の架橋が密であり, 事前混合処理土の強度が増大することなどを明らかにした.
Tsugumasa ITO, Yukikazu TSUJI
openaire   +2 more sources

Strength properties of sandy soil-cement admixtures [PDF]

Geotechnical and Geological Engineering, 2009
Soil stabilization with cement is a good solution for the construction of subgrades for roadway and railway lines, especially in “noble” foundations layers, under the platforms, and mostly in transition zones between embankments and rigid structures, where the mechanical properties of supporting soils are very much demand full ...
António Viana da Fonseca, Rodrigo Caberlon Cruz, Nilo Cesar Consoli   +2 more
openaire   +2 more sources

The plant‐available water associated with the four critical soil suctions vary depending on the different soil textures

Vadose Zone Journal
Critical soil suctions of plant‐available water (PAW), including the soil water suction at field capacity (hFC), threshold suction (hthreshold), tipping suction (htipping), and permanent wilting point (hPWP).
Gu Zhou, Jun Fan, Yuzhu Xing, Xi Wang
doaj   +1 more source

Agronomic potential of water hyacinth (Eichhornia crassipes) based organic-phosphate liquid fertilizer on strawberry growth, yield and fruit quality in contrasting soil types

Environmental Challenges
The valorisation of invasive aquatic species such as the Eichhornia crassipes presents a sustainable alternative to synthetic fertilizers. This study assessed the agronomic performance of an organic liquid fertilizer derived from water hyacinth applied ...
Joyce Nababi, Bruno Kokouvi Kokou, John Finias Kamanula, Fednand Paul Wanjala, Milliam Nakawoombe, Issa Balde, Georges Lufungula Alunga, Elijah Malinga Menard Wanda   +7 more
doaj   +1 more source

Effect of biochar application on quality of flooded sandy soils and corn growth under greenhouse conditions

Agrosystems, Geosciences & Environment, 2020
Seasonal flooding following heavy rain deposits large amounts of sediments on productive lands in the lower parts of fields in western Tennessee. The deposited sediments have high proportion of sand particles that negatively affect soil physiochemical ...
Nastaran Basiri Jahromi, Jaehoon Lee, Amy Fulcher, Forbes Walker, Sindhu Jagadamma, Prakash Arelli   +5 more
doaj   +1 more source

Nitrate leaching from arable crop rotations in organic farming [PDF]

, 2004
Nitrate leaching from crop rotations for organic grain production were investigated in a field experiment on different soil types in Denmark from 1997 to 2002.
Askegaard, Margrethe, Berntsen, Jørgen, Olesen, Jørgen E.   +2 more
core  

Instability of the salinity profile during the evaporation of saline groundwater [PDF]

, 2008
We investigate salt transport during the evaporation and upflow of saline groundwater. We describe a model in which a sharp evaporation-precipitation front separates regions of soil saturated with an air-vapour mixture and with saline water.
ANDREJ T. IL'ICHEV, CHRIS N. RICHARDSON, DAVID PRITCHARD, GEORGE G. TSYPKIN, Lide, Phillips, van Duijn, Vukalovitch   +7 more
core   +1 more source

Interactive effect of soil pore network structure and substrate quality on soil CO2 production: a combined X-ray CT incubation experiment [PDF]

, 2013
The role of soil structure in organic matter (OM) stabilization has been primarily investigated through physical fractionation studies operative at the scale of aggregates and smaller organo-mineral particles.
Bouckaert, Liesbeth, De Neve, Stefaan, Sleutel, Steven, Van Hoorebeke, Luc, Van Loo, Denis   +4 more
core  

Eco-physiological and growth responses of two halophytes to saline irrigation and soil amendments in arid conditions

BMC Plant Biology
In dry-land regions, salinity stress and poor soil structure can cause significant challenges to agricultural productivity, posing a growing threat to global food security. This study explores the performance of two halophytic plant species Sweet Clover (
Ahmad Azeem, Wenxuan Mai, Bilquees Gul, Aysha Rasheed   +3 more
doaj   +1 more source