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CONTINUOUSLY-REINFORCED CONCRETE PAVEMENT IN PENNSYLVANIA

F C Witkoski, R K Shaffer

Abstract

AN EXPERIMENTAL CONTINUOUSLY-REINFORCED CONCRETE PAVEMENT WAS CONSTRUCTED IN PENNSYLVANIA TO: (1) STUDY THE EFFECT OF PAVEMENT THICKNESS ON SERVICE PERFORMANCE, (2) STUDY THE EFFECT OF SUBBASE THICKNESS ON SERVICE PERFORMANCE, (3) DETERMINE THE MAXIMUM STRESSES IN THE REINFORCING STEEL AT A CRACK, CONSIDERING VARYING THICKNESSES OF PAVEMENT, (4) DETERMINE THE EFFECT OF TRAFFIC UPON STRESSES IN THE REINFORCING STEEL, (5) DETERMINE THE THERMAL EFFECTS ON THE STEEL AND CONCRETE STRESSES IN THE PAVEMENTS, (6) DETERMINE THE WARPING EFFECTS ON THE PAVEMENTS, (7) DETERMINE THE MAGNITUDE OF LONGITUDINAL MOVEMENTS OF THE PAVEMENTS, AND (8) DETERMINE THE ULTIMATE SLAB LENGTH. TABULAR AND GRAPHICAL RESULTS ARE PRESENTED ON THESE TESTS. HOWEVER, AT THIS TIME THE PROJECT IS ONLY SIX MONTHS OLD AND HAS BEEN OPENED TO TRAFFIC FOR A PERIOD OF THREE MONTHS. IT IS ANTICIPATED THAT AS THE PAVEMENT AGES AND MORE INFORMATION BECOMES AVAILABLE, DEFINITE CONCLUSIONS CAN BE DRAWN CONCERNING ITS MERITS.

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Key concepts: Subbase, Slab, Structural engineering, Geotechnical engineering, Service life, Subgrade, Engineering, Forensic engineering