slaking


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slaking

[′slāk·iŋ]
(geology)
Crumbling and disintegration of earth materials when exposed to air or moisture.
The breaking up of dried clay when saturated with water.
References in periodicals archive ?
In the absence of raindrop impact and external compacting pressures, there are 3 main mechanisms that could degrade the soil structure during wetting and leaching: aggregate slaking, swelling, and clay dispersion.
Slaking is strongly affected by the wetting rate of the soil: the faster wetting occurs, the greater the slaking forces (Rengasamy and Olsson 1991).
1) was the extensive aggregate slaking that took place when this soil underwent fast pre-wetting.
Due to the slow wetting rate, slaking of the aggregates was minimised, and consequently, an increase in aggregate stability with the increase in clay content was observed because of the greater cementing effect of the clay within aggregates (Kemper and Koch 1966; Kay and Angers 1999).
To identify the role of slaking in aggregate breakdown, the slaking value (SV) for a given soil was calculated using Eqn 5:
A slaking value of 1 indicates that the effect of slaking on aggregate disintegration was negligible.
Slaking measurements were made on 10-mm-diameter air-dry aggregates taken below the surface crust, which was present only in few cultivated plots.
Slaking stability was greater in grass soils than in cultivated soils (5.
Supplementary tests carried out on the September samples included a visual check of slaking by dropping air-dried aggregates weighing about 0.
Slaking of aggregates, dispersion of aggregate, and cubes
The electrolyte concentration corresponding to these EC levels prevented clay dispersion caused by ESP, and the HC was expected therefore to be affected mainly by slaking and clay swelling (Oster et al.
It seems that the two mechanisms responsible for aggregate slaking, explosion by entrapped air and differential swelling, were more active as clay content in the soils increased.