Soil Cohesion

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Soil Cohesion as

W. D

ABSTRACT

Cohesion increased for several months after disrup

soils. Rate at which cohesion increased was slower

but continued for years. Mo duli of rupture of soils awith time. Effects of wa ter content on the rate at w

increases are compatible with an explanation of the b

anism in terms of slightly soluble components dif

cementing points of contact between particles. Cohesio

to water are estimated and found to be large enough



P ortneuf S i lt Loom

Stored for1 yeat 1

iF6 0

1002

OI



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a_

uj40

re

re

0- 0

0

7

0

100

70

10

7

,--Leached with coicic top waterupturedat these water cont

. 10 cured at Indicated H2O co

oven dried prior to rupturing

•

KEMPER & ROSENAU: SOIL



1004Ofect of water content immediately prior to ion the disintegrating force during the wetbility determination. As indicated in Fig. 2, rupting aggregates are strong when those aare dry before immersion, but are minimal

aggregates have high water contents prior sion. Consequently, it is likely that cohesioand Gilmans Webster loam at 0=0.31 mtinued to increase after the first two days,the aggregates w ere already stable against th



O 0.1 e•

8 8Son Water Suctiono

u--8(P, -PO

Modulusof„,Rupture

O

0

KEMPER & ROSENAU: SOIL



1006O564.

2. Briggs, Lyman J. 1950. Limiting negative pressureAppl. Phys. 21:721-722.

3. Kemper, W.D., J.S. Olsen, and Alan Hodgdon. 197method as a determinant of large size pore persistenstrength of cultivated soils. Soil Sci. Soc. Am. Proc.

4. Kemper, W.D., and R.C. Rosenau. 1985. Aggregate size distribution. In A. Klute (ed.) M ethods of soil a1, 2nd ed. Agronomy 9 (in press).

5. Kirkham, Don, M.P. DeB oodt, and L. DeL eenheer.

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Soil Cohesion