[article]
| Titre : |
Stabilized dredged material. I, Parametric Study |
| Type de document : |
texte imprimé |
| Auteurs : |
Dennis G. Grubb, Auteur ; Maria Chrysochoou, Auteur ; Charles J. Smith, Auteur |
| Année de publication : |
2010 |
| Article en page(s) : |
pp. 1011-1024 |
| Note générale : |
Géotechnique |
| Langues : |
Anglais (eng) |
| Mots-clés : |
Soil stabilization cement Dredge spoil By-Product utilization Laboratory tests Physical properties |
| Index. décimale : |
624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels |
| Résumé : |
This study presents the results of a treatability study for dredged material (DM) stabilization using 20 combinations of pozzolanic agents (lime, cement kiln dust, high alkali and slag cements, and fly ash). The DM consisted of CH/OH soil excavated from the U.S. Army Corps of Engineers Craney Island confined disposal facility in Hampton Roads, Virginia, having an in situ moisture content of approximately 130% and void ratio of 3.35. Mix designs were prepared for each stabilized DM (SDM) blend using a 3-day mellowing period for the SDM blends to become compactable. Typical maximum dry unit weights were on the order of 11.9–12.9 kN/m3 (76–82 lb/ft3), for total dry pozzolan doses to wet DM between 5 and 95%, the upper dosing limit being unconstrained for potential use of the SDM blends as fill. Unconfined compression strength (UCS) testing of the SDM blends using DM with an initial MC of 132.5% was completed in accordance with ASTM D1632 and ASTM D1633 for curing times of 7, 28, and 180 days. The 28-day cured specimens had UCS values up to 800 kPa (115 psi). Leaching analyses of the various SDM blends for Resource Conservation and Recovery Act metals using toxicity characteristic leaching procedure and deionized water solutions for extended durations and contact times illustrated that the SDM blends were nonhazardous and virtually identical to the raw DM. Overall, the use of industrial by-products in SDM blends suggests that it may be possible to undertake large-scale fill construction that is sustainable, cost-effective, and environmentally protective of human health and the environment.
|
| DEWEY : |
624.1 |
| ISSN : |
1090-0241 |
| En ligne : |
http://ascelibrary.org/gto/resource/1/jggefk/v136/i8/p1011_s1?isAuthorized=no |
in Journal of geotechnical and geoenvironmental engineering > Vol. 136 N° 8 (Août 2010) . - pp. 1011-1024
[article] Stabilized dredged material. I, Parametric Study [texte imprimé] / Dennis G. Grubb, Auteur ; Maria Chrysochoou, Auteur ; Charles J. Smith, Auteur . - 2010 . - pp. 1011-1024. Géotechnique Langues : Anglais ( eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 136 N° 8 (Août 2010) . - pp. 1011-1024
| Mots-clés : |
Soil stabilization cement Dredge spoil By-Product utilization Laboratory tests Physical properties |
| Index. décimale : |
624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels |
| Résumé : |
This study presents the results of a treatability study for dredged material (DM) stabilization using 20 combinations of pozzolanic agents (lime, cement kiln dust, high alkali and slag cements, and fly ash). The DM consisted of CH/OH soil excavated from the U.S. Army Corps of Engineers Craney Island confined disposal facility in Hampton Roads, Virginia, having an in situ moisture content of approximately 130% and void ratio of 3.35. Mix designs were prepared for each stabilized DM (SDM) blend using a 3-day mellowing period for the SDM blends to become compactable. Typical maximum dry unit weights were on the order of 11.9–12.9 kN/m3 (76–82 lb/ft3), for total dry pozzolan doses to wet DM between 5 and 95%, the upper dosing limit being unconstrained for potential use of the SDM blends as fill. Unconfined compression strength (UCS) testing of the SDM blends using DM with an initial MC of 132.5% was completed in accordance with ASTM D1632 and ASTM D1633 for curing times of 7, 28, and 180 days. The 28-day cured specimens had UCS values up to 800 kPa (115 psi). Leaching analyses of the various SDM blends for Resource Conservation and Recovery Act metals using toxicity characteristic leaching procedure and deionized water solutions for extended durations and contact times illustrated that the SDM blends were nonhazardous and virtually identical to the raw DM. Overall, the use of industrial by-products in SDM blends suggests that it may be possible to undertake large-scale fill construction that is sustainable, cost-effective, and environmentally protective of human health and the environment.
|
| DEWEY : |
624.1 |
| ISSN : |
1090-0241 |
| En ligne : |
http://ascelibrary.org/gto/resource/1/jggefk/v136/i8/p1011_s1?isAuthorized=no |
|
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