00930583

Component

https://doi.org/10.3141/1787-09

http://scholar.google.com...MIES&publication_year=2002

The most significant problem related to base course aggregates in Finland and in many other countries affected by seasonal frost is the development of permanent deformation, especially during the frost-thawing period. From 1996 to 2000, a series of research projects was carried out to examine the mechanical, thermodynamic, electrical, and chemical factors that affect the seasonal variation of strength and deformation behavior of base course aggregates. The test series included frost heave tests and normal as well as long-lasting cyclic-loading triaxial tests performed in situations simulating seasonal conditions of dryness, moisture, and the period following a freeze-thaw cycle. Also, chemical and suction properties of the selected aggregates were examined. Results show clearly that even though the aggregates were reflecting significantly different permanent deformation behavior, the resilient deformation properties of all tested aggregates were relatively good, and their resilient modulus values were not significantly lowered even during the thawing phase. Meanwhile, the suction properties of aggregates appeared to have a significant effect on the deformation behavior. Suction properties, in turn, result foremost from the fines content but also from chemical properties of the aggregate. A fairly simple tube suction test proved to function well in identifying the problematic aggregates and in defining appropriate binder types and their required amounts. Further, the results suggest that the properties of aggregates bound with emulsified bitumen are not necessarily improved when binder content is increased.

This paper appears in Transportation Research Record No. 1787, Geomaterials 2002.

English

p. 83-89

2002

Transportation Research Record

0309077125

Figures (11) ; References (14)

Aggregates; Base course (Pavements); Binder content; Binders; Chemical properties; Deformation; Emulsified asphalt; Fines (Materials); Freeze thaw tests; Frost action; Frost heaving; Laboratory tests; Modulus of resilience; Repeated loads; Seasonally frozen ground; Soil suction; Triaxial shear tests; Tube suction test

Finland

Geotechnology; Highways; I36: Aggregates

TRIS, TRB, ATRI

Sep 19 2002 12:00AM

• COLD IN-PLACE RECYCLING AND FULL-DEPTH STRENGTHENING OF CLAY-TILL SUBGRADE SOILS: RESULTS WITH CEMENTITIOUS WASTE PRODUCTS IN NORTHERN CLIMATES
• EFFECT OF WET-DRY CYCLES ON RESILIENT MODULUS OF CLASS C COAL FLY ASH-STABILIZED AGGREGATE BASE
• EFFECTS OF GRADATION, COMPOSITION, AND DEGREE OF COMPACTION ON THE MECHANICAL CHARACTERISTICS OF RECYCLED UNBOUND MATERIALS
• EFFECTS OF PARTICLE AND MIX CHARACTERISTICS ON PERFORMANCE OF SOME GRANULAR MATERIALS
• FEASIBILITY OF GEOSYNTHETIC INCLUSION FOR REDUCING SWELLING OF EXPANSIVE SOILS
• INVESTIGATION OF RECYCLED CONCRETE MADE WITH LIMESTONE AGGREGATE FOR A BASE COURSE IN FLEXIBLE PAVEMENT
• MEASURED EFFECTS OF LIQUID SOIL STABILIZERS ON ENGINEERING PROPERTIES OF CLAY
• PRECRACKING OF SOIL-CEMENT BASES TO REDUCE REFLECTION CRACKING: FIELD INVESTIGATION
• QUANTIFICATION OF COARSE AGGREGATE ANGULARITY BASED ON IMAGE ANALYSIS
• STABILIZATION OF SILTY SAND WITH NONTRADITIONAL ADDITIVES
• STABILIZING FINE-GRAINED SOILS BY PHOSPHATE ELECTROGROUTING
• WAVELET-BASED THREE-DIMENSIONAL DESCRIPTORS OF AGGREGATE PARTICLES