%0 Journal Article
%T Effet de la combinaison de la chaux et de la pouzzolane naturelle sur le compactage et la r¨¦sistance des sols mous argileux Effect of the combination of lime and natural pozzolana on the compaction and strength of soft clayey soils
%A Harichane K.
%A Ghrici M.
%A Kenai S.
%J MATEC Web of Conferences
%D 2012
%I 
%R 10.1051/matecconf/20120202009
%X La stabilisation des sols mous a ¨¦t¨¦ pratiqu¨¦e longtemps en m¨¦langeant des ajouts, tels que le ciment, la chaux et les cendres volantes au sol pour augmenter sa r¨¦sistance. Cependant, il y a un manque d¡¯investigations sur l¡¯utilisation de la pouzzolane naturelle seule ou combin¨¦e avec la chaux pour les applications d¡¯am¨¦lioration des sols. Un programme exp¨¦rimental a ¨¦t¨¦ entrepris pour ¨¦tudier l¡¯effet de la chaux, la pouzzolane naturelle ou leur combinaison sur les caract¨¦ristiques g¨¦otechniques des sols mous. La chaux ou la pouzzolane naturelle ont ¨¦t¨¦ ajout¨¦es aux sols par des teneurs de 0-10% et 0-20% respectivement. Les ¨¦chantillons pr¨¦par¨¦s ont ¨¦t¨¦ soumis aux essais de compactage et de r¨¦sistance ¨¤ la compression non confin¨¦e. Les ¨¦chantillons ont subis des p¨¦riodes de cure de 1, 7, 28 et 90 jours apr¨¨s quoi ils ont ¨¦t¨¦ soumis aux essais de la r¨¦sistance ¨¤ la compression non confin¨¦e. Bas¨¦ sur les r¨¦sultats favorables obtenus, ilpeut ¨ºtre conclu que les sols mous argileux peuvent ¨ºtre stabilis¨¦s avec succ¨¨s par l¡¯action combin¨¦e de la chaux et de la pouzzolane naturelle. Puisque la pouzzolane naturelle est beaucoup moins ch¨¨re que la chaux, l¡¯addition de la pouzzolane naturelle dans le m¨¦lange chaux-sol peut en particulier devenir attirante et avoir comme cons¨¦quence une r¨¦duction des co ts de la construction. Soft soil stabilization has been practiced for quite some time by mixing additives, such as cement, lime and fly ash to the soil to increase its strength. However, there is a lack of investigations on the use of natural pozzolana alone or combined with lime for ground improvement applications. An experimental program was undertaken to study the effect of using lime, natural pozzolana or a combination of both on the geotechnical characteristics of soft soils. Lime or natural pozzolana was added to soft soils at ranges of 0-10% and 0-20%, respectively. In addition, combinations of limenatural pozzolana were added to soft soils at the same ranges. Test specimens were subjected to compaction tests and unconfined compression tests. Specimens were cured for 1, 7, 28 and 90 days after which they were tested for unconfined compression tests. Based on the favourable results obtained, it can be concluded that the soft soils can be successfully stabilized by the combined action of lime and natural pozzolana. Since natural pozzolana is much cheaper than lime, the addition of natural pozzolana in limesoil mix may particularly become attractive and can result in cost reduction of construction.
%U http://dx.doi.org/10.1051/matecconf/20120202009