Reliability Assessment of Concrete Pavement Sawingby Mehmet M. Kunt, Univ of Texas at Austin, Austin, United States,
B. Frank McCullough, Univ of Texas at Austin, Austin, United States,
Abstract: Traditional concrete pavement design sometimes realize on qualitative decision based on experience, with concrete pavement sawing operations representing a specific case in point. presently, sawing time and depth are generally determined by qualitative judgement. An experienced construction engineer, for example, may consider coarse aggregate type in determining the sawing depth, whereas the time of sawing is established by specification. As a result, some agencies are still using a fraction-of-depth method ranging from D/4 to D/3, depending on local experience. This paper suggests that the sawing of concrete pavements-whether jointed or continuously reinforced-should be based on prevailing weather conditions and on material properties (to prevent future joint-related distress). Accordingly, we describe a rational method for accurately estimating both the depth and time of sawing based on prevailing conditions. As a measure of quality in the sawing operation, statistical techniques are utilized to asses the reliability level. The use of these techniques will provide criteria for the sawing of concrete at a desired reliability level, eliminating in the process the need for D/3 or D/4 rules of thumb.
Subject Headings: Concrete pavements | Pavement design | Material properties | Reinforced concrete | Statistics | Construction management | Aggregates | Aging (material)
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