Development of a Roller-Compacted Concrete (RCC) Fatigue Curve with a Reliability Component from Published RCC Beam Fatigue Data

Abstract

The roller-compacted concrete (RCC) fatigue curve most commonly used in design and referenced in literature at current was developed approximately 30 years ago and is based on a limited set of 23 beams from 4 RCC mixtures. Since this first RCC fatigue curve was published, two additional studies have published RCC fatigue test results for 118 additional beam specimens from 8 RCC mixtures, but these two studies did not present an updated RCC fatigue curve for design. All of the 141 published RCC beam fatigue data points were utilized in a Kaplan-Meier survival analysis and with an advanced model fitting software to develop an RCC fatigue curve with a reliability component. Comparison of this RCC fatigue model to that published in 1987 suggests that the newer model is useful in removing some of the overconservatism built into the 1987 RCC fatigue curve.