Results
Title

Effect of the combination of lime and natural pozzolana on the compaction and strength of soft clayey soils: a preliminary study.

Authors

Harichane, Khelifa; Ghrici, Mohamed; Kenai, Said

Abstract

Soft soil stabilization has been practised 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 programme 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 lime-natural pozzolana were added to soft soils at the same ranges. Test specimens were subjected to compaction tests, shear 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 lime-soil mix may particularly become attractive and can result in cost reduction of construction.

Subjects

LIME (Minerals); POZZUOLANAS; CLAY soils; SOIL stabilization; SHEAR testing of soils

Publication

Environmental Earth Sciences, 2012, Vol 66, Issue 8, p2197

ISSN

1866-6280

Publication type

Academic Journal

DOI

10.1007/s12665-011-1441-x