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A platform for research: civil engineering, architecture and urbanism
On the Sustainable Ground Improvement Aspects of Pyrite Bearing Clay Using Lime Activated Slag
This study investigates the effect of pyrite content on the strength behavior of EngClay, a mixture of 85% kaolin and 15% bentonite, using lime activated slag. In this experiment, pyrite containing EngClay was prepared by mixing it with commercial pyrite powder (FeS2) in various proportions ranging from 0 to 7%. The prepared clay was then treated with a fixed lime content of 10% (which is well above the lime saturation point of all the pyrite containing samples of EngClay) and slag contents of 10 to 25%. Unconfined compressive strength tests were conducted to determine the strength of treated soils after 1 and 3 months of curing. pH and Atterberg limit tests were also conducted to monitor changes in pH and plasticity with curing. Based on this study, it has been found that pyrite containing soil may be effectively treated with slag activated by a lime content higher than the lime saturation point. When treated with such a high lime content, interestingly it was observed that strength of treated EngClay increased with increase in pyrite content when treated with higher slag content (>15%). However, for lower slag content (≤15%), the strength was found to be almost independent of pyrite content up to 3 months of curing.
On the Sustainable Ground Improvement Aspects of Pyrite Bearing Clay Using Lime Activated Slag
This study investigates the effect of pyrite content on the strength behavior of EngClay, a mixture of 85% kaolin and 15% bentonite, using lime activated slag. In this experiment, pyrite containing EngClay was prepared by mixing it with commercial pyrite powder (FeS2) in various proportions ranging from 0 to 7%. The prepared clay was then treated with a fixed lime content of 10% (which is well above the lime saturation point of all the pyrite containing samples of EngClay) and slag contents of 10 to 25%. Unconfined compressive strength tests were conducted to determine the strength of treated soils after 1 and 3 months of curing. pH and Atterberg limit tests were also conducted to monitor changes in pH and plasticity with curing. Based on this study, it has been found that pyrite containing soil may be effectively treated with slag activated by a lime content higher than the lime saturation point. When treated with such a high lime content, interestingly it was observed that strength of treated EngClay increased with increase in pyrite content when treated with higher slag content (>15%). However, for lower slag content (≤15%), the strength was found to be almost independent of pyrite content up to 3 months of curing.
On the Sustainable Ground Improvement Aspects of Pyrite Bearing Clay Using Lime Activated Slag
Islam, S. (author) / Chowdhury, B. (author) / Haque, A. (author)
Proceedings of the Fourth International Conference on Grouting and Deep Mixing ; 2012 ; New Orleans, Louisiana, United States
Grouting and Deep Mixing 2012 ; 1781-1788
2012-08-17
Conference paper
Electronic Resource
English
Grouting , Highways and roads , Soil mixing , Chemical grouting , Anchors , Cement , Slag , Cutoffs , Clays , Piles , Mixing , Soil stabilization , Foundations , Hydraulic structures
On the Sustainable Ground Improvement Aspects of Pyrite Bearing Clay Using Lime Activated Slag
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