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原文传递 CONSTRUCTION REPORT ON THE INSTALLATION OF RETROFIT DOWEL BAR TEST SECTIONS ON TH 23.

题名：	CONSTRUCTION REPORT ON THE INSTALLATION OF RETROFIT DOWEL BAR TEST SECTIONS ON TH 23.
作者：	Embacher-E
关键词：	Before-and-after-studies; Concrete-pavements; Construction-; Dowels-Fasteners; Load-transfer; Minnesota-; Patching-mortar; Pavement-joints; Performance-; Rehabilitation-Maintenance; Retrofitting-; Ride-quality-Pavements; Test-sections
摘要：	A section of Trunk Highway 23 near Mora, Minnesota, underwent concrete rehabilitation in 1998, which included the installation of retrofit dowel bars over a portion of the project. The Minnesota Department of Transportation (Mn/DOT) established several different test sections to evaluate the performance of different dowel bar configurations, group materials, and dowel bar lengths. During dowel bar installation, researchers monitored and evaluated construction procedures. They also conducted pavement testing before and after installation of the retrofit dowel bars to determine any immediate improvements to the joint performance. As expected, early age testing has shown improvements in joint load transfer efficiency after installation of the retrofit dowels. Testing also revealed that the rapid-setting mortar performed better than Mn/DOT's standard 3U18 patching mix. After only two years, there has been no noticeable differences in ride quality or faulting at the joints between retrofit and nonretrofit joints. Testing of pavements and joint performance will continue on a yearly basis to determine the long-term performance of the retrofit dowels.
总页数：	2001/04. pp49 (Phots., Figs., Tabs., 2 App.)
报告类型：	科技报告