O'Kelly, B. C., Vardanega, P. J. & Haigh, S. K. (2018). Use of fall cones to determine Atterberg limits: a review. Géotechnique 68, No. 10, 843–856, https://doi.org/10.1680/jgeot.17.R.039. On page 844, in the section headed ‘Repeatability of the thread-rolling test’, the unit of plasticity index was not definitively stated; for completeness, it should have read ‘… plasticity index (IP, %) ...’.
Consequently, the final term in equation (2) is incorrect; the corrected equation is as follows.
Furthermore, in the text immediately below equation (5) on page 845, the values given for the percentage variation in su(insitu)/σ′v0 were incorrect; the text should read ‘… the percentage variation in su(insitu)/σ′v0 from its mean value would range between 1·0% and 6·0% ...’.
The authors apologise to the readers of Géotechnique for these mistakes in the original paper.
