Study of liquid limit values determined by Casagrande cup and Cone penetrometer test for different clays.
DOI:
https://doi.org/10.24849/j.geot.2017.140.04Keywords:
Empirical correlations, liquid limit, cone penetrometer technique, Casagrande method, plasticity, claysAbstract
This study presents and discusses the comparisons between the liquid limit, LLp, determined by the cone penetrometer technique and the liquid limit determined by Casagrande method, LLc, measured by different operators for different clayey soils at low and high plasticity ranges. The used cone penetrometer technique is the British standard (20 mm fall cone penetration). The results show that the variation between LLc and LLp depends on the plasticity and mineralogy of the tested cohesive soil. For the Brazilian kaolinitic clays with LLc between 14% and 98%, LLp is often 2.7 % higher than LLc. The mixtures of bentonitic and fine sand with LLc > 100%, have LLc equal to about 1.2 LLp.
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