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Author: Kevin B. Jones
Publisher:
ISBN:
Category : Pavements, Concrete
Languages : en
Pages : 20
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Book Description
High-speed non-contact laser profilers have become the standard testing equipment for pavement management ride quality testing. The same technology used in the high-speed profilers is now being used in lightweight profilers for construction smoothness testing. The lightweight profilers have many advantages over the California 25-ft profilograph. Despite the many advantages of the lightweight profilers, there is resistance from the contracting industry toward eliminating the 25-ft profilograph for construction ride testing. One way to reduce or overcome the resistance is to evaluate and demonstrate the advantages/disadvantages of the lightweight profiler in actual field use in Iowa. The objective of the study was to purchase a lightweight profiler and to evaluate its suitability for construction smoothness quality verification and quality acceptance on Iowa projects. A lightweight profiler, an Ames Engineering, Inc. LISA single laser unit, was received in February 2003 for the study. Based on the work done during the 2003 construction season, the following conclusions can be made: (1) For hot mix asphalt surfaces, the LISA correlated well with the contractors' profilographs; (2) LISA results are significantly affected by longitudinal tining on portland cement concrete pavements, requiring a laser system upgrade to give accurate results; (3) A significant time saving was realized by using the LISA; (4) Increasing visibility and reducing time in the construction zone improved safety; (5) One person with limited lifting capabilities could set up and operate the LISA; and (6) With the current Iowa Department of Transportation specification, the LISA cannot totally replace the profilograph, since bridges and short segments with no adjoining pavement would still require a profilograph.
Author: Kevin B. Jones
Publisher:
ISBN:
Category : Pavements, Concrete
Languages : en
Pages : 20
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Book Description
High-speed non-contact laser profilers have become the standard testing equipment for pavement management ride quality testing. The same technology used in the high-speed profilers is now being used in lightweight profilers for construction smoothness testing. The lightweight profilers have many advantages over the California 25-ft profilograph. Despite the many advantages of the lightweight profilers, there is resistance from the contracting industry toward eliminating the 25-ft profilograph for construction ride testing. One way to reduce or overcome the resistance is to evaluate and demonstrate the advantages/disadvantages of the lightweight profiler in actual field use in Iowa. The objective of the study was to purchase a lightweight profiler and to evaluate its suitability for construction smoothness quality verification and quality acceptance on Iowa projects. A lightweight profiler, an Ames Engineering, Inc. LISA single laser unit, was received in February 2003 for the study. Based on the work done during the 2003 construction season, the following conclusions can be made: (1) For hot mix asphalt surfaces, the LISA correlated well with the contractors' profilographs; (2) LISA results are significantly affected by longitudinal tining on portland cement concrete pavements, requiring a laser system upgrade to give accurate results; (3) A significant time saving was realized by using the LISA; (4) Increasing visibility and reducing time in the construction zone improved safety; (5) One person with limited lifting capabilities could set up and operate the LISA; and (6) With the current Iowa Department of Transportation specification, the LISA cannot totally replace the profilograph, since bridges and short segments with no adjoining pavement would still require a profilograph.
Author: Melissa Ann Quinton
Publisher:
ISBN:
Category :
Languages : en
Pages : 392
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Book Description
Author: Amit Mondal
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 86
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Book Description
Author: Robert Otto Rasmussen
Publisher: Transportation Research Board
ISBN: 0309129419
Category : Technology & Engineering
Languages : en
Pages : 143
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Book Description
"TRB's second Strategic Highway Research Program (SHRP 2) Report S2-R06E-RR-1: Real-Time Smoothness Measurements on Portland Cement Concrete Pavements During Construction explores real-time smoothness measuring technologies for concrete paving. For the purposes of the report, real-time smoothness refers to measuring and evaluating the concrete pavement surface profile during construction along the paving train while the concrete surface is still wet. The report also includes draft suggested specifications and guidelines related to the use of technologies that allow paving crews to measure smoothness in real time. The results of Renewal Project R06E will be incorporated into an electronic repository for practitioners, known as the NDToolbox, which will provide information regarding recommended technologies for the detection of a particular deterioration. The NDToolbox is in the process of being created by SHRP 2 Renewal Project R06A, which has released SHRP 2 Report S2-R06A-RR-1: Nondestructive Testing to Identify Concrete Bridge Deck Deterioration that identifies nondestructive testing technologies for detecting and characterizing common forms of deterioration in concrete bridge decks. Renewal Project R06E, which produced SHRP 2 Report S2-R06E-RR-1, is one of seven follow-on projects to SHRP Renewal Project R06 that produced SHRP 2 Report S2-R06-RW: A Plan for Developing High-Speed, Nondestructive Testing Procedures for Both Design Evaluation and Construction Inspection, which examines existing and emerging nondestructive evaluation (NDE) technologies and their current state of implementation to satisfy the NDE needs for highway renewal."--Publisher description.
Author: Steven M. Karamihas
Publisher:
ISBN:
Category : Pavements, Concrete
Languages : en
Pages : 68
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Book Description
Author: National Academies of Sciences, Engineering, and Medicine
Publisher: Transportation Research Board
ISBN: 0309273021
Category : Social Science
Languages : en
Pages : 250
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Book Description
This report from the second Strategic Highway Research Program (SHRP 2), which is administered by the Transportation Research Board of the National Academies, documents the evaluation and demonstration of real-time smoothness measuring technologies on Portland Cement Concrete (PCC) pavements during construction. The research in this report will improve process control and allow for two technologies, the GOMACO Smoothness Indicator and the Ames Engineering Real Time Profiler, which were both tested in the field on actual paving projects in Arkansas, Texas, Michigan, Georgia, and New York.
Author: E. G. Fernando
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 194
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Book Description
The Texas Department of Transportation (TxDOT) is implementing smoothness specifications based on profilograph testing as part of its construction quality control/quality assurance (QC/QA) program. Most tests are presently conducted using automated, California-type profilographs in which the equipment is pushed over a prescribed wheelpath. It appears that smoothness specifications will continue to be based on the profilograph, at least for the short term. However, in view of advances in profiling technology, it becomes prudent to investigate other methods of measuring surface profile and develop smoothness specifications based on profilers that offer greater accuracy and higher production rates. Already, a number of districts have expressed concerns about the sensitivity of the profilograph to short wavelengths or high frequency ripples. This observation demonstrates the need for more accurate measurements of surface profile for the purpose of building pavements that offer excellent ride quality, lower road user costs, and longer service lives. In pursuit of its goal of providing smooth pavements, TxDOT initiated a research project with the Texas Transportation Institute (TTI) to develop a smoothness specification for asphalt concrete overlays based on the new generation of pavement profilers that offer greater accuracy in profile measurement relative to the profilographs presently used in construction projects. Among other things, this research project evaluated a number of profile measuring devices to establish the availability of equipment for implementing a new profile-based smoothness specification in Texas. This report presents the findings of the profile equipment evaluation.
Author: Mary Stroup-Gardiner
Publisher: ASTM International
ISBN: 0803134606
Category : Pavements, Asphalt
Languages : en
Pages : 156
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Book Description
This publication contains papers presented at a December 2001 symposium, focusing on hot mix asphalt (HMA) smoothness measurements, specifications, and equipment. Five papers provide insight into the development and implementation of roughness specifications for pavements, and two papers offer natio
Author:
Publisher:
ISBN:
Category : Highway research
Languages : en
Pages : 64
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Book Description
Author:
Publisher:
ISBN:
Category : Highway research
Languages : en
Pages : 340
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Book Description
