详情

Development of Proper Overlay Type and Designs for PCC Pavement

项目名称：	Development of Proper Overlay Type and Designs for PCC Pavement
摘要：	Currently, guidelines on portland cement concrete (PCC) pavement overlay on PCC pavement are more focused on overlay slab thickness determination for mostly jointed concrete pavement (CPCD), but do not provide clear directions on (1) whether existing PCC pavement is a good candidate for concrete overlay, or (2) if it is, which overlay type-bonded concrete overlay (BCO) or unbonded concrete overlay (UBCO)-is appropriate. This deficiency in currently available guidelines is primarily due to insufficient information on the structural responses and performance of PCC overlays built on PCC pavements at various structural conditions. Very few existing design guidelines address continually reinforced concrete pavement (CRCP) overlays because other states have not built CRCP as much as Texas has. As of 2014, Texas Department of Transportation (TxDOT) manages a total of 17,300 lane miles of PCC pavement, which represents an important asset to TxDOT. As PCC pavements in Texas built in the 1960s through 1980s have already exceeded or are approaching the end of their design lives, many of these projects will require rehabilitations in one form or another. This is especially true for the projects built prior to 1986, when TxDOT changed the pavement design period from 20 to 30 years. Those projects built or designed prior to 1986 have a deficiency in slab thickness from today�s truck traffic volumes. Sound guidelines are needed for the selection of an optimum overlay type, especially for CRCP overlays, which could extend the performance period of structurally deficient PCC pavements in Texas at a reasonable cost.
状态：	Completed
资金：	271633
资助组织：	Texas Department of Transportation
项目负责人：	Kuhr, James
执行机构：	Texas Tech University, Lubbock
主要研究人员：	Won, Moon C
开始时间：	20160101
预计完成日期：	20180228
实际结束时间：	0