-Six well-characterized soil kaolins from widely separated sites in south-western Australia and four reference kaolins were studied by 57Fe M6ssbauer spectroscopy at room temperature after removal of non-structurally-bound iron with dithionite-citrate-bicarbonate solution. The soil kaolins and one of the reference kaolins were also studied at temperatures near 16 K. The soil kaolins were remark...

This work identifies the main phenomena that control the peptisation and transport of clay particles in a sand core. Clay can be dispersed into small particles in an aqueous solution of low ionic strength. This property is used to generate clay particles with NaCl concentration varying from 0.5 M to 0.015 M. For this purpose, a chromatographic column is initially packed with a 5 % clay-sand mix...

to study the effect of different substrates on growth and yield of gerbera, this experiment was carried out as randomized completely block design with 14 treatments and 3 replications. treatments were as fallowing: fine sand, peat+fine sand (25%+75%), peat+fine sand (50%+50%), perlite+peat (75%+25%), perlite+peat (50%+50%), perlite+peat (25% +75%), perlite+peat+expanded clay (25%+70%+5%), perli...

Population densities of Belonolaimus longicaudatus, Pratylenchus brachyurus, and Trichodorus christiei were determined from soil samples taken weekly in Tifton, Georgia during a 14-month period (except for April and May) at 15-cm increments to a depth of 105 cm. Belonolaimus longicaudatus predominately inhabited the top 30 cm of soil that was 87-88% sand, 6-7% silt, and 5-7% clay. No specimens ...

Natural gas hydrates exist in large quantities nature and represent a potential source of energy, mostly the form methane gas. Knowledge about hydrate formation clayey sand is importance for understanding production from reservoirs, as well impact global warming on stability subsurface hydrates. In this paper, we explore effect clay content phase transitions unconsolidated at realistic reservoi...

This paper presents the assessment of consolidation and creep settlements an isolated circular footing supported on soft clay samples reinforced with a single granular column. Clay (300 mm dia., 400 high) were formed from reconstituted kaolin remoulded sleech (exhibiting significant creep). These tested using chambers various features to capture settlement under constant foundation loading. In ...

Abstract This paper presents an experimental study on quantifying the effects of soil suction resistance offered by compacted unsaturated backfills to uplift buried steel pipes and identifying mechanisms that contribute increased compared similar in dry sand. is achieved means 1-g physical model experiments, with pipe sandy loam–Kaolin beds varying water content (suction), same unit weight. The...