Laboratory Evaluation of Crushed Glass–Dredged Material Blends
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 132, Issue 5
Abstract
A comprehensive laboratory evaluation of blending minus curbside-collected crushed glass (CG) with dredged material (DM) was conducted to evaluate their potential for beneficial use as fill materials for urban applications. Tests were performed on 100% CG (USCS classification SP) and 100% DM (OH) specimens and , , , , and CG–DM blends (dry weight percent CG content reported first). The addition of 20% CG resulted in a 10–20 point (33–67%) reduction in while increasing the dry density by approximately for standard and modified levels of compaction, respectively. Simultaneously, the compressibility of the DM was reduced by approximately 50% and the hydraulic conductivity was reduced by order of magnitude. The addition of 20% CG significantly decreased the moisture content and significantly improved the workability of the 100% DM, where workability refers to the ease of handling, transport, placement, and compaction of the CG–DM blends (compared to 100% DM). CIŪ triaxial strength testing indicated effective friction angles of 34 and 37° for 100% DM and CG compacted to a minimum of 95% relative compaction by ASTM D1557, respectively. A peak effective friction angle of 39° occurred for the and CG–DM blends which were also 1 and 3 orders of magnitude more permeable than 100% DM, respectively. Related increases in resulted in decreased times required for consolidation. The range of properties obtainable by the CG–DM blends offers a versatility that allows for the design of fills that can be potentially optimized to meet multiple design parameters (e.g. strength, settlement, drainage, or higher CG or DM content).
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Acknowledgments
The USACE-Philadelphia District provided the funds and dredged material to support this research under Contract No. UNSPECIFIEDDACW61-03-C-0021 to Apex Environmental, Inc. (Malvern, Pa.). Mr. Thomas W. Groff (USACE) is thanked for his support and involvement. Blue Mountain Recycling LLC (Philadelphia) provided the crushed glass for this study. Additional financial support for this research was provided by the National Science Foundation under Grant Nos. NSFCMS-0134370 and NSFCMS-0238614. Philip Pickering and Justin Ungerer and GeoSystems Consultants are thanked for their assistance in the laboratory testing program. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the writers and do not necessarily reflect the views of the project sponsors.
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Information & Authors
Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 132 • Issue 5 • May 2006
Pages: 562 - 576
Copyright
© 2006 ASCE.
History
Received: Mar 30, 2005
Accepted: Aug 29, 2005
Published online: May 1, 2006
Published in print: May 2006
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