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Field evaluation of crushed glass-dredged material blends
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|Title: ||Field evaluation of crushed glass-dredged material blends|
|Authors: ||Grubb, Dennis G.|
Davis, Atwood F.
Sands, Steven C.
Carnivale, Michael III
Gallagher, Patricia M.
|Keywords: ||Field tests;Recycling;Dredge spoils;Physical properties;Soil mixing;Embankment;Cone penetration tests|
|Issue Date: ||Jan-2007|
|Publisher: ||American Society of Civil Engineers (ASCE)|
|Citation: ||Journal of Geotechnical and Geoenvironmental Engineering, 133(1): pp. 127-128.|
|Abstract: ||Based on the laboratory results reported in a companion paper, three crushed glass–dredged material CG–DM blends were
prepared and evaluated in the field to explore the feasibility of using CG–DM blends in general, embankment and structural fill
applications. A trailer-mounted pugmill successfully prepared 20/ 80, 50/ 50, and 80/20 CG–DM blends dry weight percent CG content
reported first within a tolerance of ±5 dry % by weight of the targeted percentages. Blending criteria were routinely met at pugmill
throughputs up to 1,500 m3 / day. The constructed 20/80 CG–DM embankment was compacted to a minimum of 90% modified Proctor
compaction, whereas the 50/50 and 80/20 CG–DM embankments were constructed to a minimum of 95% modified Proctor compaction.
Twenty to 80% CG addition to DM resulted in 1.5–5.5 kN/m3 increases in field dry densities above 100% DM, densities not achievable
with other DM stabilization techniques such as Portland cement, fly ash, and/or lime PC/FA/lime addition. CG substantially improved
the workability of DM allowing construction with conventional equipment and three person crew while achieving very consistent and
reproducible results during a timeline of frequent and heavy precipitation events. The 20/ 80, 50/ 50, and 80/20 CG–DM embankments
were characterized by average cone tip resistances on the order of 1.0, 1.5, and 2.0 MPa, respectively. An environmental evaluation of
100% CG, DM and 50/50 CG–DM blend samples coupled with an economic analysis of a scaled-up commercial application illustrated
that the CG–DM blending approach is potentially more cost effective than PC/FA/lime stabilization approaches. These features of
CG–DM blending make the process attractive for use in urban and industrial settings.|
|Appears in Collections:||Faculty Research and Publications (CAEE)|
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