Compressibility of a Fat Clay mixed with aggregatesDoula Bouteraa1*and Ahmed Rouili2
- *Corresponding Author:
- Doula Bouteraa
Laboratoire de Génie Civil Appliqué LGCA
University of Tebessa, Algeria
Tel: +213 21 24 79 50
E-mail: [email protected]
Received Date: June 14, 2016; Accepted Date: June 20, 2016; Published Date: June 22, 2016
Citation: Bouteraa D, Rouili A (2016) Compressibility of a ‘Fat’ clay mixed with aggregates. J Civil Environ Eng 6: 240. doi: 10.4172/2165-784X.1000240
Copyright: © 2016 Bouteraa D, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
‘Fat’ clayey soils, containing large proportion of fines (more than 50%) and mixture of aggregates are usually encountered as natural deposits in a high plasticity state. These soils may be used as row material after chemical or mechanical stabilization, in many earthworks applications. The clay content, the amount and size of aggregates, are known to affect the compressibility potential, and thus, the stiffness of the soil when subjected to vertical loads. In this investigation, a comprehensive oedometer testing program was conducted on reconstituted artificial samples, made of various mass proportions of kaolin, sand and gravel. The moisture content of the samples varied accordingly to the percentage of kaolin content in each series, but yielding samples of high plasticity, having the same Atterberg limits. The compressibility was characterized herein by the coefficient of volume compressibility (mv). The results indicate that, for this type of soils, the compressibility is much more affected by the coarser matrix (ratio of the mass percentage of the gravel to the mass percentage of sand G/S) rather than the percentage of clay content. Based on the observations made, a chart is proposed for a quick estimation of the compressibility potential of fat clays.