Session Start Date

6-1-1988

Abstract

Under normal conditions weathered rock provides poor landfill cover because of its permeable nature. However, a recent hydrogeological investigation conducted by the US Army Environmental Hygiene Agency (AEHA) of the Patacon Landfill in the Republic of Panama revealed the contrary. The operators were using weathered rock from the surrounding saprolitic outcrops of the Panama formation and Tertiary andesite intrusions for landfill cover. The AEHA selected samples of the weathered rock from the borrow sites for engineering tests at their soils engineering lab at Aberdeen Proving Ground, Maryland. The following are test results. Water induces the weathered rock to slake very quickly to a gravely silt. Compaction of the samples yielded an average Proctor density of 1.74 gm/cm3 at 19 percent optimum moisture content. The lab achieved a low permeability of 6 x 10-7 cm/sec on the compacted samples. The test results suggest that properly prepared weathered rock will substitute as borrow material for landfill cover.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Second Conference

Publisher

University of Missouri--Rolla

Publication Date

6-1-1988

Document Version

Final Version

Rights

© 1988 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

Share

 
COinS
 
Jun 1st, 12:00 AM

Use of Deeply Weathered Rock as Landfill Cover Material, Patacon Landfill, Republic of Panama

Under normal conditions weathered rock provides poor landfill cover because of its permeable nature. However, a recent hydrogeological investigation conducted by the US Army Environmental Hygiene Agency (AEHA) of the Patacon Landfill in the Republic of Panama revealed the contrary. The operators were using weathered rock from the surrounding saprolitic outcrops of the Panama formation and Tertiary andesite intrusions for landfill cover. The AEHA selected samples of the weathered rock from the borrow sites for engineering tests at their soils engineering lab at Aberdeen Proving Ground, Maryland. The following are test results. Water induces the weathered rock to slake very quickly to a gravely silt. Compaction of the samples yielded an average Proctor density of 1.74 gm/cm3 at 19 percent optimum moisture content. The lab achieved a low permeability of 6 x 10-7 cm/sec on the compacted samples. The test results suggest that properly prepared weathered rock will substitute as borrow material for landfill cover.