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Influence of natural pozzolana and lime additives on the temporal variation of soil compaction and shear strength |
Khelifa HARICHANE1( ), Mohamed GHRICI1, Hanifi MISSOUM2 |
| 1. Civil Engineering Department, Chlef University, Chlef 02000, Algeria; 2. Civil Engineering Department, Mostaganem University, Mostaganem 27000, Algeria |
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Abstract Soil stabilization has been practiced for quite some time by adding mixtures, such as cement, lime and fly ash. The additives of lime (L), natural pozzolana (NP) or a combination of both were investigated here on the impact on the temporal variation of geotechnical characteristics of two cohesive soils. Lime and natural pozzolana were added at the content of 0–8% and 0–20%, respectively. The soil specimens were cured for 1, 7, 28 and 90 days and then tested for shear strength. Our data show that a combination of lime with natural pozzolana causes the increase in the maximum dry density but the decrease in the optimum moisture content in the gray soil, and vice verse in the red soil. The shear stress of both cohesive soils stabilized with lime or with the combination of lime and natural pozzolana was found to increase with time. The cohesion and the internal friction angle in lime-added samples were demonstrated to increase with time. The combination of lime with natural pozzolana exhibits a significant effect on the enhancement of the cohesion and the internal friction angle at later stages. The lime-natural pozzolana combination appears to produce higher shear parameters than lime or natural pozzolana used alone.
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| Keywords
cohesive soil
lime (L)
natural pozzolana (NP)
compaction
shear strength
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Corresponding Author(s):
HARICHANE Khelifa,Email:kharichane@yahoo.fr
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Issue Date: 05 June 2011
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