Author: Nathan David RauPublisher:
ISBN:
Category :
Languages : en
Pages : 144
Book Description
Stress Distribution in Early Age Bonded Concrete Overlays
Author: Nathan David RauDelamination of Bonded Concrete Overlays at Early Ages
Author: James Ray LundyPublisher:
ISBN:
Category : Laminated materials
Languages : en
Pages : 100
Book Description
A procedure is developed by which the likelihood of delamination of bonded concrete overlays on continuously reinforced concrete pavements is reduced. The procedure compares the early age interface stress to the expected interface bond strength for a variety of environmental conditions. When the calculated stress exceeds the expected strength, it is recommended that overlay placement be curtailed until the possibility of debonding is reduced. A finite element method program is used to determine the early age stresses resulting from temperature and shrinkage induced volume changes. Stresses were determined for a variety of environmental and material combinations and overlay thicknesses. Analyses show that a significant reduction in stress results from the use of overlay materials which have a lower modulus and thermal coefficient than those of the existing slab. The stresses for a given combination of materials and environmental conditions are compared to the interface bond strength at early ages. Early age interface shear and tensile strengths are estimated from 7-day strength test results. The estimated strength, together with the variability of the interface strength, are used to calculate the likelihood of delamination for a given type of overlay and time of placement. This likelihood can be reduced through the selection of a different overlay material or time of placement.
Thermal Stress in Bonded Concrete Overlays at Early Age
Author: Beril BicerInvestigation of Early-age Bonded Concrete Overlay Failure
Author: Christopher Allen DavisPublisher:
ISBN:
Category : Concrete
Languages : en
Pages : 352
Book Description
Early Age Behavior of Bonded Concrete Overlays Due to Shrinkage and Thermal Changes
Author: Hak-Chul ShinDesign and Construction of Bonded Concrete Overlays
Author: Concrete Science and Engineering
Author: Portland Cement Concrete Overlays
Author: Kurt D. SmithPublisher:
ISBN:
Category : Pavements
Languages : en
Pages : 200
Book Description
This report presents the latest information on the design, construction and performance of portland cement concrete (PCC) overlays. It describes the four types of PCC overlays that are commonly used in highway pavement applications: bonded PCC overlays, unbonded PCC overlays, conventional whitetopping and ultra-thin whitetopping. Recommended applications, critical design elements, current overlay design methodologies, recommended construction practices, and performance highlights are described for each overlay type. Information is also provided on the selection of PCC overlays as possible rehabilitation alternatives for existing pavements. Taken together, this document addresses the current "state of the technology" of PCC overlays placed on both existing PCC pavements and on existing hot-mix asphalt pavements.
Guide to Concrete Overlays
Author: Dale S. HarringtonPublisher:
ISBN:
Category : Pavements
Languages : en
Pages : 88
Book Description
Author: