EFFECT OF INCREASED TIRE PRESSURES AND LOAD LIMITS ON EXISTING PAVEMENTS - A SENSITIVITY ANALYSIS . THIRD INTERNATIONAL CONFERENCE ON BEARING CAPACITY OF ROADS AND AIRFIELDS. PROCEEDINGS, NORWEGIAN INSTITUTE OF TECHNOLOGY, TRONDHEIM, NORWAY, JULY 3-5 1990. VOLUMES 1-2

This paper considers the use of a single four-tyred single axle to investigate the effect of increasing loads and tyre contact pressures on a given pavement structure. The basic pavement structure was assumed to be 4 inches of asphaltic concrete placed on 8 inches of crushed stone above 12 inches of gravel over a subgrade having a Young's modulus of elasticity of 6000 psi. Single axle loads of 11, 12 and 13 tonnes (22.4, 24.64, 26.88 and 29.12 kilopounds) were applied for each tyre contact pressure of 80, 100, 120 and 140 psi. The crushed stone layer had the largest magnitude and variation in magnitude of work strain that reflects the shear component. The variation in work strain in the asphalt layer also reflected the shear. The largest effects of load variations occurred in the structure below the asphalt layer, and reflected primarily the effect of shear. Thus shear appears to be the single most critical component. The net effect of all components is expressed by 'work strain'. Research is needed to determine the relationship of limiting shear for asphaltic materials and a fatigue-shear relationship that may also depend on stiffness. (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/8251910331
• Corporate Authors:

  Tapir

  Trondheim University, Gloeshaugen
  Trondheim-NTH,   Norway 
• Authors:
  • Southgate, H F
• Publication Date: 1990

Language

• English

Media Info

• Features: References;
• Pagination: p. 681-690
• Serial:
  • Publication of: Tapir Publishers
  • Publisher: Tapir

Subject/Index Terms

• TRT Terms: Age hardening; Asphalt concrete; Axle load force; Bearing capacity; Conferences; Crushed rock; Deflection; Fatigue (Physiological condition); Impact studies; Inflation; Modulus of elasticity; Pavements; Shear strength; Tire pressure; Tires
• Uncontrolled Terms: Precipitation hardening
• Old TRIS Terms: Pavement deflection
• Subject Areas: Highways; Pavements; Vehicles and Equipment;

Filing Info

• Accession Number: 00612300
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• ISBN: 82-519-1033-1
• Files: ITRD, TRIS
• Created Date: Aug 31 1991 12:00AM