00668944

Component

http://onlinepubs.trb.org...trr/1994/1432/1432-006.pdf

https://scholar.google.co...yers&publication_year=1994

Frost penetration is a major environmental concern in landfill design. Freezing and thawing cycles may cause deterioration of the liner or cap, affecting permeability. The depth of frost penetration into the paper sludge cap at the Hubbardston Landfill in Massachusetts was measured by using a frost measurement system. A thermistor probe measured the temperature at various depths. Although temperature measurements are important, soil resistivity measurements are required to accurately predict the freezing level, since soil resistivity increases greatly on freezing. A conductivity probe measured the half bridge voltage between conductivity rings and a ground rod. Data were collected in data loggers. The data collected during the winter of 1992-1993 showed that the frost level did not penetrate the paper sludge capping layer. Heavy snow cover throughout the winter decreased the depth of frost penetration by insulating the landfill. The high water content in the sludge also contributed to the lack of freezing. One-dimensional freezing tests were conducted on the paper sludge in the laboratory by using the frost measurement system. Freezing of the material did occur, since soil resistivity increased steadily as the temperature decreased. It was shown that subzero temperatures are required to freeze the paper sludge.

This paper appears in Transportation Research Record No. 1432, Innovations in Instrumentation and Data Acquisition Systems. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

01401243

English

p. 44-49

1994-10

Transportation Research Record

0309055148

Figures (6) ; Photos (2) ; References (11) ; Tables (1)

Data logging; Depth; Electric insulating materials; Freeze thaw durability; Freezing; Frost; Insulating materials; Laboratory tests; Landfills; Moisture content; Paper; Permeability; Sludge (Deposit); Snow cover; Thermistors

Conductivity; Frost penetration; Soil resistivity

Geotechnology; Highways; I42: Soil Mechanics

TRIS, TRB

Nov 8 1994 12:00AM

• AUTOMATIC STRESS PATH CONTROL SYSTEM FOR HOLLOW CYLINDER TORSIONAL TESTING OF SOILS
• CONCURRENT TUTORIALS AND APPLICATIONS
• DATA ACQUISITION SYSTEM AND COMPUTER CONTROL OF CALIBRATION CHAMBER TESTS ON SAND
• DESIGN AND DATA ACQUISITION FOR THERMAL CONDUCTIVITY MATRIC SUCTION SENSORS
• DEVELOPMENT OF MINIATURE EQUIPMENT FOR A SMALL GEOTECHNICAL CENTRIFUGE
• FIBER OPTIC PORE PRESSURE SENSOR DEVELOPMENT
• INSTRUMENTATION AND DATA ACQUISITION FOR FIELD SUCTION MEASUREMENT
• INSTRUMENTATION FOR REMOTE AND CONTINUOUS MONITORING OF STRUCTURE CONDITIONS
• LONG-TERM PAVEMENT PERFORMANCE SEASONAL MONITORING PROGRAM: INSTRUMENTATION SELECTION AND INSTALLATION
• STATIC AND DYNAMIC MEASUREMENTS USING EMBEDDED EARTH PRESSURE CELLS
• USE OF AIR-REGULATING VALVES IN GEOTECHNICAL LABORATORY TESTING
• USING DEVICE-SPECIFIC DATA ACQUISITION FOR AUTOMATED LABORATORY TESTING