00237190

Component

http://onlinepubs.trb.org...s/hrr/1965/101/101-001.pdf

PROCEDURES USED TO INSTALL FOAMED PLASTIC ON A CLAY SUBGRADE NEAR WINNIPEG ARE DESCRIBED. THE FOAM WAS A RIGID POLYSTYRENE PLACED ON THE SUBGRADE AND COVERED WITH 12 IN. OF GRAVEL BASE AND A 4-IN. BITUMINOUS SURFACE. INFORMATION OBTAINED BY THERMOCOUPLES INDICATED THAT 2-IN. THICK FOAM REDUCED FROST PENETRATION TO A FEW INCHES IN THE SUBGRADE AND 3 1/4 IN. OF FOAM ESSENTIALLY PREVENTED FROST PENETRATION. THE CONTROL SECTION SHOWED THAT THE RIGOROUS CLIMATE WHICH GENERALLY EXPERIENCES 3,500 DEGREE-DAYS OF FROST RESULTED IN FROST PENETRATION OF 7 FT WHEN FOAMED PLASTIC IS NOT USED. /AUTHOR/

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01410057

pp 1-10

1965

Highway Research Record

Digital/other

Figures (10) ; Tables (4)

Base course (Pavements); Bituminous materials; Clay; Experiments; Frost; Gravel; Plastic foams; Polystyrene; Prevention; Soil stabilization; Subgrade (Pavements); Surface treating; Thermocouples

Frost penetration

Geotechnology; Highways; Security and Emergencies

TRIS, TRB

Mar 3 1994 12:00AM

• EXCESS PORE PRESSURES WHICH DEVELOP DURING THAWING OF FROZEN FINE-GRAINED SUBGRADE SOILS
• FROST-HEAVING PRESSURES
• USE OF INSULATING LAYER TO ATTENUATE FROST ACTION IN HIGHWAY PAVEMENTS