Structural Evaluation of Cement Concrete Roads in Mumbai City
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VIEW CORRECTIONPublication: Journal of Performance of Constructed Facilities
Volume 20, Issue 2
Abstract
Plain jointed concrete pavements laid in Mumbai City (India) during the early 1990s were structurally evaluated using a falling weight deflectometer (FWD) and testing of concrete cores extracted from the pavement slabs. The ultrasonic pulse velocity (UPV) of the concrete in the cores was determined first and then the cores were crushed under compression. The pavement deflections were found to be within the limits as suggested in the Indian codes and the international literature. The joint conditions were also found to be satisfactory. The design strength of the concrete was back-calculated from the compressive strength of the cores and was found to conform to the design specifications. However, the construction quality was found wanting as the thickness of pavement slabs at a few locations was lower than that specified and it has resulted in cracking of the slabs. The dynamic modulus of elasticity of concrete as determined by the FWD was found to correspond well with that computed from the UPV of cores and from the compressive strength of concrete. A method is suggested to estimate the structural parameters of uncracked pavement slabs from the dynamic modulus of elasticity obtained through the indirect method of UPV testing which is less expensive compared to evaluation by the FWD.
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Acknowledgments
The writers wish to convey their deep sense of gratitude to the Director, Central Road Research Institute for kindly permitting them to write this research paper. Thanks are also due to Dr. Ram Kumar, Group Leader, BIE (currently Head, Bridges and Structures Division) for his valuable suggestions during the preparation of the paper. The writers are also thankful to Mr. M. S. Rana, Senior Draftsman, for neatly preparing the figures/diagrams for this work.
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Published In
Journal of Performance of Constructed Facilities
Volume 20 • Issue 2 • May 2006
Pages: 156 - 166
Copyright
© 2006 ASCE.
History
Received: Aug 16, 2004
Accepted: Oct 25, 2004
Published online: May 1, 2006
Published in print: May 2006
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