Theory and practice of the fall cone test

Water Content Determinations for Peat and Other Organic Soils Using the Oven-Drying Method

“…For example, in the case of inorganic soil, coefficient b relates to the soil compressibility. [38,39] Laboratory studies by O'Kelly [35] and Zentar et al [40] have shown that for organic clays (LOI of 57% and 6.7-9.7% respectively), the log w-log ur s relationship is also strongly linear, extending well beyond the measured plastic range. reported for the different oven temperatures in Fig.…”

“…(3) for further consideration. Koumoto and Houlsby [38] have shown that the values of coefficients a and b in Eq. (3) are closely related to geoengineering properties.…”

Some Recent Developments in the Determination of the Atterberg Limits

“…Feng, 2000 andKoumoto &Houlsby, 2001) is also shown to be an acceptable way to describe fall cone data. If modeled in this way, a higher value of the slope increase is computed owing to the high curvature of the function close to the plastic limit.…”

“…The soil strength at liquid limit (c L ) is reported in the literature to fall in the range 0.7 to 2.65 kPa and was taken to be at the centre of this range, (1.7 kPa), by Wroth & Wood (1978). Koumoto & Houlsby (2001) give a detailed theoretical analysis of the mechanics of the fall cone test, showing the tests's sensitivity to cone angle, cone bluntness, surface roughness of the cone and cone heave.…”

Simple Methodology to Obtain Critical State Parameters of Remolded Clays Under Normally Consolidated Conditions Using the Fall-Cone Test

“…Nowadays, it is widely used in several countries as a standardized test for the characterization of the liquid limit (w l ) of cohesive soils (Koumoto and Houlsby 2001). The fall cone might be preferable over the Casagrande cup method for determining the liquid limit, because it can better be explained by the accepted theories.…”