00727303

Component

https://doi.org/10.1177/0361198196152500107

https://scholar.google.co...hmad&publication_year=1996

The AASHTO design guide's rigid pavement equation that is used for thickness design was originally developed in 1960 at the conclusion of the road test. This equation predicts the number of axle loads for a given slab thickness and loss in serviceability. During the last 30 years, the original equation has been extended to include several additional design factors and has been used by many highway agencies for rigid pavement design. Due to the limited inference space of the original road test equation and the subjective nature of the subsequent extensions, there is considerable interest in determining the adequacy of the equation. The availability of the nationwide long-term pavement performance data has finally made an overall evaluation possible. The evaluation included determining the adequacy of predicting the number of heavy axle loads required to cause a given loss of serviceability. The results indicate that the original 1960 equation generally overpredicts the number of 80-kN (18-kip) equivalent single axle loads for a given loss of serviceability. However, extensions to the original model improve predictions considerably. These results were determined at the 50-percentile (mean) level. At a higher level of reliability such as 95%, the 1986 AASHTO model provides a conservative design for a majority of the pavement sections. However, several deficiencies that need to be improved still remain.

This paper appears in Transportation Research Record No. 1525, Rigid Pavement Design and Rehabilitation Issues.

English

p. 57-71

1996

Transportation Research Record

0309062233

Figures (11) ; References (9) ; Tables (3)

Axle load force; Databases; Deficiencies; Equations; Equivalent single axle loads; Forecasting; Mathematical models; Pavement design; Pavement performance; Performance evaluations; Rigid pavements; Serviceability; Thickness; Traffic equivalence factor

American Association of State Highway and Transportation Officials; Long-Term Pavement Performance Program

Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces

TRIS, TRB

Oct 18 1996 12:00AM

• A DIFFERENT PERSPECTIVE FOR INVESTIGATION OF PORTLAND CEMENT CONCRETE PAVEMENT DETERIORATION
• ANALYSIS OF CURRENT STATE RIGID PAVEMENT DESIGN PRACTICES IN THE UNITED STATES
• CASE STUDY OF OVERLAY PERFORMANCE ON RIGID PAVEMENT IN BOWIE COUNTY, TEXAS
• CORNER STRESS ANALYSIS OF JOINTED CONCRETE PAVEMENTS
• CURLING STRESS EQUATION FOR TRANSVERSE JOINT EDGE OF A CONCRETE PAVEMENT SLAB BASED ON FINITE-ELEMENT METHOD ANALYSIS
• DEVELOPMENT OF DOWEL LOOSENESS PREDICTION MODEL FOR JOINTED CONCRETE PAVEMENTS
• DEVELOPMENT OF JOINTED CONCRETE PAVEMENT DATABASE FOR STATE OF TEXAS
• FACTORS AFFECTING JOINT EFFICIENCY OF ROLLER-COMPACTED CONCRETE PAVEMENT JOINTS AND CRACKS
• LOAD TRANSFER CHARACTERISTICS OF ROLLER-COMPACTED CONCRETE PAVEMENT JOINTS AND CRACKS
• LONG-TERM PERFORMANCE OF RECYCLED PORTLAND CEMENT CONCRETE PAVEMENT
• METHODOLOGY FOR ESTIMATING REMAINING LIFE OF CONTINUOUSLY REINFORCED CONCRETE PAVEMENTS
• NEW PROCEDURE FOR EVALUATING BOND STRENGTH OF CONCRETE REINFORCEMENT
• WESTERGAARD-TYPE SOLUTION FOR EDGE LOAD TRANSFER PROBLEM