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Long Term Performance Of Accelerated Rigid Pavements Project Cxmp 13 0006 07
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Book Synopsis Long-term Performance of Accelerated Rigid Pavements, Project CXMP 13-0006-07 by : Ardani Ahmad
Download or read book Long-term Performance of Accelerated Rigid Pavements, Project CXMP 13-0006-07 written by Ardani Ahmad and published by . This book was released on 1996 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the post-construction evaluation of the fast track pavement in Sterling, Colorado. The field evaluation consisted of visual inspection, fault measurement, profile measurement and distress survey. A set of falling weight deflectometer (FWD) measurements was also acquired to assess the structural responses and to evaluate load transfer efficiency between the slabs. The results of this study demonstrated that fast track concrete can be as durable as the conventional concrete pavement. After seven years of being in service the pavement has shown no sign of fatigue, only some minor distresses unrelated to fast track techniques.
Book Synopsis Improving Colorado Transportation Through Investigation and Innovation by : Beth Moore
Download or read book Improving Colorado Transportation Through Investigation and Innovation written by Beth Moore and published by . This book was released on 1999 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summary of current research studies.
Book Synopsis Long-range Cost Estimation Research Project by :
Download or read book Long-range Cost Estimation Research Project written by and published by . This book was released on 2000 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this project was to research long-range (parametric) cost estimation at the Colorado Department of Transportation (CDOT), utilizing AASHTO's Trns.port Cost Estimation and Decision Support software. Info Tech, Inc., analysis reviewed CDOT's current long-range estimation practices and identified revisions which would be needed to satisfactorily meet CDOT's future cost estimating requirements, i.e., in order to develop consistent and reliable cost estimates when little is known about a project. Both item and contract classifications utilized by CDOT in BAMS/DSS were revised to reflect more logical functional groupings. The new contract work type and item classification were used directly to develop an Interim Solution for Long-Range Cost Estimation that uses historical bid-based default prices. Info Tech analysts also researched Internet sources to identify the availability of major item cost data at the regional and national level, including data for multimodal project types.
Book Synopsis Performance Evaluation of Various Corrosion Protection Systems of Bridges in Colorado by : Yunping Xi
Download or read book Performance Evaluation of Various Corrosion Protection Systems of Bridges in Colorado written by Yunping Xi and published by . This book was released on 2004 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Corrosion of reinforced concrete structures has been a significant problem for many state and transportation agencies since the application of deicing salts was introduced. Much research has been conducted to develop corrosion protection systems that can prolong the life span of reinforced concrete structures. The Colorado Department of Transportation (CDOT) has several routine and experimental measures to prevent corrosion of the rebar including epoxy-coated rebar, calcium nitrite admixture, organic corrosion inhibitors, a thick cover of quality concrete, and a waterproofing membrane covered by an asphalt overlay. An extensive literature review was performed to collect information on various corrosion protection systems that have been used in the U.S. and around the world. Current CDOT practices in terms of corrosion protection measures were reviewed. A draft inspection plan for Colorado's bridge structures was proposed.
Book Synopsis Accessions Checklist, Colorado State Publications by :
Download or read book Accessions Checklist, Colorado State Publications written by and published by . This book was released on 1998 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation and Comparison of Three Chemical Deicers for Use in Colorado by : William M. Lewis
Download or read book Evaluation and Comparison of Three Chemical Deicers for Use in Colorado written by William M. Lewis and published by . This book was released on 2001 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Avalanche Forecasting Methods, Highway 550 by :
Download or read book Avalanche Forecasting Methods, Highway 550 written by and published by . This book was released on 1996 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 33-mile segment of US Highway 550 has a greater avalanche hazard than aU other Colorado highways combined. A total of 95 avalanche paths intersect the highway with an avalanche hazard of 443. More than 70 encounters between avalanches and vehicle. and six fatalities have occurred since 1950. The objective of this research project is to develop a methodology for calculating the severity of a particular avalanche activity. The project is not intended to develop a "black box" type of computer program for avalanche forecasting. Instead, it is intending to investigate parameters that may be important in forecasting on Highway 550, and to suggest how they may be used to forecast avalanches in the future
Book Synopsis Determining the Degree of Aggregate Degradation After Using the NCAT Asphalt Content Tester by : Randolph Reyes
Download or read book Determining the Degree of Aggregate Degradation After Using the NCAT Asphalt Content Tester written by Randolph Reyes and published by . This book was released on 1997 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of the research conducted was to determine if aggregate degradation takes place and to measure the possible degree of degradation after bituminous mixtures are heated inside the NCAT Asphalt Content Tester. A study was conducted which compared the original aggregate blend (control specimens) to the residual aggregate blend (experimental specimens) obtained after several bituminous mixtures were heated inside the NCAT Asphalt Content Tester. The control specimens and the experimental specimens used to produce the bituminous mixtures were the result of an aggregate sample which was split three times. Two methods of analysis were used to review the gradation results.
Book Synopsis Development of Site-specific ESAL by : Sirous H. Alavi
Download or read book Development of Site-specific ESAL written by Sirous H. Alavi and published by . This book was released on 2002 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study was approved by the CDOT's Research Implementation Committee as a high priority research with the goal of improving the accuracy of the existing and forecasted traffic loads of CDOT's highway network. The overall scope of this project involved examination of those resources directly related to the current statewide ESAL classification system and the generation of this final report discussing the research and analysis conducted and recommendation of procedures required for CDOT to develop and implement a more site-specific ESAL classification system. In this study Nichols Consulting Engineers (NCE) analyzed all available CDOT permanent and portable weigh-in-motion (WIM) data.
Book Synopsis HBP Pilot Void Acceptance Projects in Region 2 in 1997 by : Bud A. Brakey
Download or read book HBP Pilot Void Acceptance Projects in Region 2 in 1997 written by Bud A. Brakey and published by . This book was released on 1998 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summaries and analyses of three Void Acceptance (VA) projects are reported and compared with previous VA and quality assurance and quality control (QA & QC) projects. For two of the three projects, the voids filled with asphalt (VFA) averaged 77% (design criteria was 65-75%) and percent air voids (AV) averaged 3.2% (design target was 4.0%). Because compacted bulk specific gravity field tests were higher than lab-mixed design values, for all processes, field AV and voids in mineral aggregate (VMA) averaged 0.4% below design values. VMA was easily met after field targets were adjusted.
Book Synopsis 1997 HBP QC for Pay Pilot Projects with Void Acceptance by : Bud A. Brakey
Download or read book 1997 HBP QC for Pay Pilot Projects with Void Acceptance written by Bud A. Brakey and published by . This book was released on 1998 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of Design-build Practice in Colorado, Project IR IM(CX)025-3(113) by : Pete Graham
Download or read book Evaluation of Design-build Practice in Colorado, Project IR IM(CX)025-3(113) written by Pete Graham and published by . This book was released on 2001 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Construction and Monitoring of Post-tensioned Masonry Sound Walls by : David B. Woodham
Download or read book Construction and Monitoring of Post-tensioned Masonry Sound Walls written by David B. Woodham and published by . This book was released on 2002 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this project was to document the installation of a post-tensioned concrete masonry sound wall constructed as part of a widening and sound wall project along US 36 near Denver, Colorado. In addition, the wall was instrumented at the time of construction to monitor the loss in prestress in the steel tendons over time due to concrete masonry creep and shrinkage and steel relaxation. Tendon tension was monitored for one year to obtain values for the accumulated losses. Accurate losses in post-tensioned concrete masonry are important for economical design. Currently, there are limited data to support an accurate prediction of prestress loss in concrete masonry.
Book Synopsis Estimating Link Travel Time on I-70 Corridor by : Sarosh I. Khan
Download or read book Estimating Link Travel Time on I-70 Corridor written by Sarosh I. Khan and published by . This book was released on 2000 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report represents the findings of a study that demonstrates the feasibility of estimating link travel time and speed in real-time for rural, mountainous sections of interstate freeway in Colorado using vehicles instrumented with global positioning system (GPS) receivers, serving as probes in traffic streams. The system configuration developed includes a cost-effective, portable GPS deployment unit, communication links to a server PC and an integrated prototype system for vehicle tracking and estimating link travel time statistics. This study was carried out in two phases. The objective of the first phase was to identify a cost-effective means of monitoring traffic within a rural, mountainous stretch of the I-70 freeway. An algorithm was developed to estimate average link speed, travel time and the standard error of estimates to provide user information on the reliability of the estimates based on the probe data. The algorithm was tested for different traffic conditions and geometric characteristics of links. In the second phase of the project, a real-time demonstrational prototype was developed to receive, process and estimate link travel time and speed statistics in real-time. The system was tested off-line and on-line based on field data received from the I-70 corridor. In addition, GPS receivers were deployed using a commercial vanpool service and the system was evaluated further.
Book Synopsis HBP Pilot Void Acceptance Projects Completed in 1993-1996 by : Bud A. Brakey
Download or read book HBP Pilot Void Acceptance Projects Completed in 1993-1996 written by Bud A. Brakey and published by . This book was released on 1997 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1993, the Colorado Department of Transportation (CDOT) recognized that specifying HBP volumetric properties would likely provide superior pavements. A long range goal was set for acceptance to be based on voids properties. Beginning in 1993, a series of void acceptance (VA) pilot projects were let to contract; by the end of 1996, nine had been completed. Six had conventional mix designs. The last three were designed using Superpave technology. The data for the nine VA projects are summarized and compared with data from concurrent CDOT projects under Quality Level Analysis (QLA).
Book Synopsis Cost-benefit Evaluation Committee by : Timothy Aschenbrener
Download or read book Cost-benefit Evaluation Committee written by Timothy Aschenbrener and published by . This book was released on 2001 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this evaluation was to document a cost-benefit evaluation of the 3-year warranty specification and projects for hot bituminous pavements (HBP). There were 6 warranty projects evaluated that included 3 projects whose warranty terms had expired. Each warranty project was compared to a comparable non-warranted project.
Book Synopsis I-76 Truck Study by : David A. Price
Download or read book I-76 Truck Study written by David A. Price and published by . This book was released on 1998 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: Portions of the driving lane on I-76 located in the Colorado Department of Transportation's (CDOT's) Region 4 are seriously distressed. To help prolong the life of the Portland Cement Concrete Pavement Region 4 has placed signs advising truckers to use the passing lane between Roggen and the Nebraska state line [approximately 140 miles (225 km)]. A test section well within the signed test area advising the truckers to use the passing lane and a control section just prior to the signed area were established and evaluated over a four year period. Roughness data taken with an Ames Profilograph, slab faulting measured with a Georgia fault meter, and overall physical pavement distress were noted and used as a comparison between driving lane and passing lane within the two sections.
