Evaluation of Concrete Pavements with Tied Shoulders Or Widened Lanes Bert E
39 19. K. Y. Kung. A New Method in Correlation Study of vision of Pavements. Proc., 3rd International Con Pavement Deflection and Cracking. Proc., 2nd In ference on Structural Design of Asphalt Pavements, ternational Conference on Structural Design of 1972, pp. 1188-1205. Asphalt Pavements, 1967, pp. 1037-1046. 20. P. H. Leger and P. Autret. The Use of Deflection Publication of this paper sponsored by Committee on Pavement Condi Measurements for the Structural Design and Super- tion Evaluation. Evaluation of Concrete Pavements With Tied Shoulders or Widened Lanes Bert E. Colley, Claire G. Ball, and Pichet Arriyavat, Portland Cement Association Field and laboratory pavements were instrumented and load tested to reducing pavement performance, Because of this prob evaluate the effect of widened lanes, concrete shoulders, and slab thick lem, several states have installed costly longitudinal ness on measured strains and deflectfons. Eight slabs were tested in the and transverse drainage systems. Thus, concrete field and two in the laboratory. Pavement slabs were 203, 229, or 254 shoulders and widened lanes have the potential for curing mm (8, 9, or 10 in) thick. Other major design variables included the width of lane widening, the presence or absence of dowels or of a con many drainage problems as well as providing additional crete shoulder, joint spacing, and the type of shoulder joint construc slab strength. tion. Generally, there was good agreement between measured strains and Many design features contribute to pavement life. values calculated by using Westergaard's theoretical equations. Concrete The effect of some of these features can be evaluated shoulders were effective in reducing the magnitude of measured strains analytically.
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