A methodology for evaluating the condition of jointed portland cement concrete pavements (JCP) by non-destructive deflection testing was recently applied on the National Route 4 (N4) between Middelburg and Witbank. A set of two calibrated Multidepth Deflectometers (MDD) measured traffic-associated vertical absolute deflections at both sides of a transverse joint. A piezo-electric film trip triggered the data accumulation process. Joint efficiencies were then calculated from absolute deflections measured by both MDDs. Joint efficiency is one of the inputs of theoretical-mechanistic models for the calculation of stresses and deflections in the pavement structure. In this paper, charts developed from the ILLI-SLAB progam code illustrate how stresses in concrete pavements vary for different joint efficiencies and moduli of subgrade reaction.
Reference:
Balmaceda, P. and De Beer, M. 1992. Field evaluation and computer simulation of undoweled transverse joints in rigid pavements. 12th Annual Transportation Convention, 1992, University of Pretoria, Pretoria
Balmaceda, P., & De Beer, M. (1992). Field evaluation and computer simulation of undoweled transverse joints in rigid pavements. http://hdl.handle.net/10204/10705
Balmaceda, P, and Morris De Beer. "Field evaluation and computer simulation of undoweled transverse joints in rigid pavements." (1992): http://hdl.handle.net/10204/10705
Balmaceda P, De Beer M, Field evaluation and computer simulation of undoweled transverse joints in rigid pavements; 1992. http://hdl.handle.net/10204/10705 .
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