Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Evaluating the potential for reflection cracking using the rolling dynamic deflectometer
A common rehabilitation strategy used for repairing aged concrete pavement is to place a hot mix asphalt (HMA) overlay on the existing concrete pavement. However, reflection cracks are often found to propagate from the underlying cracks and joints through the HMA layer. As such, much reflection cracking is believed to be caused by differential vertical and horizontal movements. A common method to determine the differential vertical movements is by measuring the load transfer efficiency (LTE) at the joints using nondestructive deflection testing devices. In this paper, the Rolling Dynamic Deflectometer (RDD) was used to evaluate the movement of joints in concrete pavements. Evaluation of joint movements by RDD testing permits estimation of the LTE of each joint. Based on the assumption that reflection cracks are more likely to form at joints with low LTE than at joints with high LTE. Pavement engineers can use the results to identify areas with low LTE, and perform necessary repairs at these locations to reduce the potential for creating reflection cracking. Finally, field data collected prior to rehabilitation work on US 82 highway near Gainesville, Texas is presented in this paper as a case study. In addition, the benefits of continuous deflection profiling for use in the district rehabilitation strategy are also discussed.
Evaluating the potential for reflection cracking using the rolling dynamic deflectometer
A common rehabilitation strategy used for repairing aged concrete pavement is to place a hot mix asphalt (HMA) overlay on the existing concrete pavement. However, reflection cracks are often found to propagate from the underlying cracks and joints through the HMA layer. As such, much reflection cracking is believed to be caused by differential vertical and horizontal movements. A common method to determine the differential vertical movements is by measuring the load transfer efficiency (LTE) at the joints using nondestructive deflection testing devices. In this paper, the Rolling Dynamic Deflectometer (RDD) was used to evaluate the movement of joints in concrete pavements. Evaluation of joint movements by RDD testing permits estimation of the LTE of each joint. Based on the assumption that reflection cracks are more likely to form at joints with low LTE than at joints with high LTE. Pavement engineers can use the results to identify areas with low LTE, and perform necessary repairs at these locations to reduce the potential for creating reflection cracking. Finally, field data collected prior to rehabilitation work on US 82 highway near Gainesville, Texas is presented in this paper as a case study. In addition, the benefits of continuous deflection profiling for use in the district rehabilitation strategy are also discussed.
Evaluating the potential for reflection cracking using the rolling dynamic deflectometer
Untersuchung des Reflexionsvermögens von Rissen mittels rollendem dynamischen Deflektometer
Lee, J.L.Y. (Autor:in) / Chen, D.H. (Autor:in) / Stokoe, K.H. (Autor:in) / Scullion, T. (Autor:in)
2004
20 Seiten, 9 Bilder, 16 Quellen
Aufsatz (Konferenz)
Datenträger
Englisch
Evaluating Potential for Reflection Cracking with Rolling Dynamic Deflectometer
| British Library Online Contents | 2004
| British Library Online Contents | 2007