Download or read book Identifying Segregation in Hot Mix Asphalt Pavements Using Rolling Nuclear Gage Measurements and Infrared Imaging written by M. Stroup-Gardiner and published by . This book was released on 2000 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Previous research indicated that density, gradation, and asphalt content change due to segregation. A rolling nuclear gage capable of measuring both density and hydrogen count was evaluated for its ability to detect and measure both density and asphalt content. Eight projects (four recently constructed pavements and four during construction) were used to evaluate this instrument. Longitudinal density profiles were obtained for each project at transverse quarter points across the lane. Additional testing included infrared thermography and traditional destructive testing of cores.
Download or read book Transportation Research Record written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Determining a Temperature density Relationship After Completed Rolling of HMA written by and published by . This book was released on 2002 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pilot Implementation of PAVE IR for Detecting Segregation in Hot mix Asphalt Construction written by and published by . This book was released on 2006 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Determining a Temperature density Relationship After Completed Rolling of Hot mix Asphalt written by Stephen Michael Schoenfelder and published by . This book was released on 2001 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Nonnuclear Density Tests on Hot Mix Asphalt Segregation written by Chieh-Min Chang and published by . This book was released on 2007 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the identification of segregation on asphalt pavements has been based on visual observations around the world, it is essential to develop a quantitative method to detect the presence and severity of segregation.The nonnuclear density device was selected for the field measurements at nine test sites, and cores were taken for laboratory testing.The nonnuclear density difference between segregated and control areas was found to increase with increasing the segregation severity.For medium or heavy segregated areas, the nonnuclear density difference was more than 90 kg/m3.In medium or heavy segregated areas, the air voids increased by 20 % and the indirect tensile strength decreased by 8 % as compared to the control areas.The criterion to detect segregation was based on the statistical differences in nonnuclear measured density values with a p-value 0.05.If a statistical difference in nonnuclear density between segregated and control areas existed, the chance of aggregate gradation difference in percent passing the 3/8 in., No.4 and No.8 sieves for medium and heavy segregation was 78 and 64 %, respectively.In addition to the field nonnuclear density readings, the material properties of asphalt mixtures obtained from 108 cores, including texture depth and percent air voids were selected as independent variables to develop a model to predict the calibrated nonnuclear density difference between the segregated and control areas.This quantitative model holds a great promise as a tool to identify potential areas of segregation using both lab data and field nonnuclear density measurements for quality assurance purposes.
Download or read book Investigation of Electromagnetic Gauges for Determining In place HMA Density written by and published by . This book was released on 2007 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: Density is an important component of hot-mix asphalt (HMA) pavement quality and long-term performance. Insufficient density of an in-place HMA pavement is the most frequently cited construction-related performance problem. This study evaluated the use of electromagnetic gauges to nondestructively determine densities. Field and laboratory measurements were taken with two electromagnetic gauges-a PaveTracker and a Pavement Quality Indicator (PQ1). Test data were collected in the field during and after paving operations and also in laboratory on field mixes compacted in the lab. This study revealed that several mix-and project-specific factors affect electromagnetic gauge readings. Consequently, the implementation of these gauges will likely need to be done utilizing a test strip on a project- and mix-specific basis to appropriately identify an adjustment factor for the specific electromagnetic gauge being used for quality control and quality assurance (QC/QA) testing. The substantial reduction in testing time that results from employing electromagnetic gauges rather than coring makes it possible for more readings to be used in the QC/QA process with real-time information without increasing the testing costs.
Download or read book Segregation in Hot mix Asphalt Pavements written by and published by . This book was released on 2000 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comparison of Nuclear and Non nuclear Density Gauges for Determining In place Density of Hot Mix Asphalt written by Anthony Timm and published by . This book was released on 2012 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Asphalt Base Course Construction and Acceptance Requirements Phase 1 written by Roger Green and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Asphalt base is widely used in Ohio. During calendar year 2015, approximately 138,000 yd3 (105,500 m3) of Item 301 Asphalt Base and approximately 531,000 yd3 (406,000 m3) of Item 302 Asphalt Base were placed for ODOT by contract [ODOT, 2015]. Acceptance of asphalt base material, Ohio Department of Transportation (ODOT) Construction and Material Specifications (CMS) Items 301 and 302, is based on plant information, and compaction methods using specified roller types, roller weights, and coverage requirements. There is concern regarding the construction process requirements stemming from acceptance staffing reductions and some cases of premature failures. The purpose of this research was to evaluate ODOT's current acceptance methods, including an investigation of whether additional testing of the materials is warranted, whether at the plant, at the place of installation, or further specification of the mix design. Tests proposed and conducted for Phase I of this project include: AASHTO T 166 - Standard Method of Test for Bulk Specific Gravity (GMB) of Compacted Hot Mix Asphalt (HMA) Using Saturated Surface-Dry Specimens. ; AASHTO T 209 - Standard Method of Test for Theoretical Maximum Specific Gravity and Density of Hot-Mix Asphalt. The SSD procedure, per ODOT Supplement 1036.01 D 2, was used for cores. ; AASHTO T 283 - Standard Method of Test for Resistance of Compacted Asphalt Mixtures to Moisture-Induced Damage. ; AASHTO TP 124 - Standard Method of Test for Determining the Fracture Potential of Asphalt Mixtures Using Semicircular Bend Geometry (SCB) at Intermediate Temperature. ; TEX-245-F - Cantabro Loss. The research team extracted and tested 720 cores from 51 project sites located in 31 counties and 11 of the 12 ODOT Districts. Analysis of the data identified the following opportunities to improve the quality of ODOT asphalt base: Investigate the use of infrared imaging or nuclear density gage to reduce segregation ; Investigate the use of a density specification to reduce measured in-place air voids variability ; Investigate the use of a thickness criteria to reduce the variability of pavement thickness ; Investigate the use of a threshold value for Cantabro mass loss to improve durability of AC base material ; Evaluate the impact of delivery and compaction temperature of the asphalt mixture on in-place air voids and segregation. A plan for Phase 2 research is presented.
Download or read book Quantifying Segregation in HMA Pavements Using Non nuclear Density Devices written by Donald A. Larsen and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report National Cooperative Highway Research Program written by and published by . This book was released on 1964 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Construction 2000 written by and published by . This book was released on 2000 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Superpave Mix Design written by Asphalt Institute and published by . This book was released on 2001-01-01 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Concrete Pavement Rehabilitation written by and published by . This book was released on 1997 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Load transfer restoration (LTR) is a rehabilitation technique for increasing the load transfer capability of existing jointed portland cement concrete pavement by placement of dowel bars or other mechanical devices across joints and/or cracks that exhibit poor load transfer.
Download or read book The Asphalt Handbook written by Asphalt Institute and published by . This book was released on 2007 with total page 788 pages. Available in PDF, EPUB and Kindle. Book excerpt: For more than 70 years, "MS-4" has served the asphalt industry as its primary reference manual. This new, expanded edition showcases the advances in asphalt technology, covering such topics as superpave courses, asphalt binder, quality control, and rehabilitation of concrete pavements with HMA.
Download or read book Stone Matrix Asphalt written by Krzysztof Blazejowski and published by CRC Press. This book was released on 2016-04-19 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the years since the development and subsequent success of Stone Matrix Asphalt (SMA), a plethora of articles have emerged, scattered throughout various publications. The time is right for a comprehensive resource that collects, examines, and organizes this information and makes it easily accessible. A compilation and distillation of the latest k
