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Use of Lime Kiln Dust to Improve Properties of Pavement Subgrades
https://orcid.org/http://orcid.org/0000-0002-0094-9529
Recycled waste and by-product materials have been increasingly used as soil stabilization agents; one of these by-product materials that has become attractive in the last years is lime kiln dust (LKD). Field and laboratory experiments were conducted in this study to evaluate the benefits of LKD for the stabilization of subgrade soils. A series of dynamic cone penetration (DCP) and lightweight deflectometer (LWD) tests were performed on three different construction sites in Kansas, the USA, to evaluate the in-situ strength and stiffness of LKD-treated subgrade soils. Subgrade soil properties were evaluated immediately after compaction and multiple days of curing. Four soils obtained from the field sites and other locations were mixed with different rates of LKD, lime, and Class C fly ash and tested in the laboratory for comparison. The laboratory tests determined basic soil characterization, swelling potential, durability, and short (immediate) and long term (after curing) strength of the native and LKD-treated soils. Field and laboratory tests showed more than 100% improvement in strength for the LKD-treated soil over the native soil, with most of the additional strength developing during the first three days after compaction. LKD also substantially reduced the plasticity and swelling potential of the treated soils and improved their durability against freeze–thaw and wet–dry conditions. Overall, LKD performed comparably with lime but better than the Class C fly ash tested. In addition, a good correlation between DCP and LWD field data and an excellent correlation between DCP and unconfined compressive strength results was obtained.
Use of Lime Kiln Dust to Improve Properties of Pavement Subgrades
https://orcid.org/http://orcid.org/0000-0002-0094-9529
Recycled waste and by-product materials have been increasingly used as soil stabilization agents; one of these by-product materials that has become attractive in the last years is lime kiln dust (LKD). Field and laboratory experiments were conducted in this study to evaluate the benefits of LKD for the stabilization of subgrade soils. A series of dynamic cone penetration (DCP) and lightweight deflectometer (LWD) tests were performed on three different construction sites in Kansas, the USA, to evaluate the in-situ strength and stiffness of LKD-treated subgrade soils. Subgrade soil properties were evaluated immediately after compaction and multiple days of curing. Four soils obtained from the field sites and other locations were mixed with different rates of LKD, lime, and Class C fly ash and tested in the laboratory for comparison. The laboratory tests determined basic soil characterization, swelling potential, durability, and short (immediate) and long term (after curing) strength of the native and LKD-treated soils. Field and laboratory tests showed more than 100% improvement in strength for the LKD-treated soil over the native soil, with most of the additional strength developing during the first three days after compaction. LKD also substantially reduced the plasticity and swelling potential of the treated soils and improved their durability against freeze–thaw and wet–dry conditions. Overall, LKD performed comparably with lime but better than the Class C fly ash tested. In addition, a good correlation between DCP and LWD field data and an excellent correlation between DCP and unconfined compressive strength results was obtained.
Use of Lime Kiln Dust to Improve Properties of Pavement Subgrades
https://orcid.org/http://orcid.org/0000-0002-0094-9529
Recycled waste and by-product materials have been increasingly used as soil stabilization agents; one of these by-product materials that has become attractive in the last years is lime kiln dust (LKD). Field and laboratory experiments were conducted in this study to evaluate the benefits of LKD for the stabilization of subgrade soils. A series of dynamic cone penetration (DCP) and lightweight deflectometer (LWD) tests were performed on three different construction sites in Kansas, the USA, to evaluate the in-situ strength and stiffness of LKD-treated subgrade soils. Subgrade soil properties were evaluated immediately after compaction and multiple days of curing. Four soils obtained from the field sites and other locations were mixed with different rates of LKD, lime, and Class C fly ash and tested in the laboratory for comparison. The laboratory tests determined basic soil characterization, swelling potential, durability, and short (immediate) and long term (after curing) strength of the native and LKD-treated soils. Field and laboratory tests showed more than 100% improvement in strength for the LKD-treated soil over the native soil, with most of the additional strength developing during the first three days after compaction. LKD also substantially reduced the plasticity and swelling potential of the treated soils and improved their durability against freeze–thaw and wet–dry conditions. Overall, LKD performed comparably with lime but better than the Class C fly ash tested. In addition, a good correlation between DCP and LWD field data and an excellent correlation between DCP and unconfined compressive strength results was obtained.
Use of Lime Kiln Dust to Improve Properties of Pavement Subgrades
Int. J. of Geosynth. and Ground Eng.
Kakrasul, Jamal I. (author) / Parsons, Robert L. (author) / Han, Jie (author)
2022-08-01
Article (Journal)
Electronic Resource
English
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