Title: COMPARISON OF ROLLER COMPACTED CONCRETE PAVEMENT RESPONSES TO STATIC AND DYNAMIC LOADS
Abstract: This study aimed to compare roller compacted concrete (RCC) pavement responses to static and dynamic loads. Two sets of non-destructive load testing were performed on RCC pavements, one using static and the other dynamic loading. A back-calculation procedure for estimating concrete pavement parameters is also presented. The RCC pavements were located at Moran Terminal, Boston, Massachusetts, and consisted of an RCC layer of 38 cm, a 23-cm gravel subbase, and a compacted subgrade. The RCC layer was constructed in 3 lifts from bottom to top of 14, 14, and 10 cm. Four slabs were selected for testing. Strains and deflections were measured for static loading tests. A Benkelman beam was used for measuring the static load induced by deflections. Deflection basins were determined during heavy weight deflectometer tests. Load transfer efficiency at cracks and construction joints was also measured for both tests. The back-calculation procedure was demonstrated to be satisfactory in estimating in situ pavement material properties. Using estimated RCC elastic moduli and estimated moduli of subgrade reaction, the stresses in the slabs caused by the static loads were computed by finite element method and compared to field measured stresses. It was found that the computed stresses were always greater than the measured values. A factor of safety of about 4% can be expected when heavy weight deflectometer data is used in place of static vehicle test data in rigid pavement analysis and design.
Publication Year: 1993
Publication Date: 1993-01-01
Language: en
Type: article
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