Download or read book Calibration and Reliability of a Nuclear Asphalt Content Gauge written by John F. Adam and published by . This book was released on 1987 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: The investigation of the calibration transfer procedure indicates that it will be feasible to develop mix calibrations in the Central Lab as part of the design process, and transfer them to District gauges for monitoring project asphalt contents with an acceptable degree of accuracy and repeatability.
Download or read book Evaluation of Nuclear Asphalt Content Gage written by George L. Regan and published by . This book was released on 1975 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: The developments of nuclear asphalt content gages were reviewed and gage operation and use were studied in the laboratory to determine significant parameters that may affect nuclear gage results. Two Troxler Model 2226 Asphalt Content Gages, serial Nos. 307 and 308, were used in this study. Parameters investigated were (a) asphalt content; (b) moisture content; (c) aggregate gradation; (d) interactions of (a), (b), and (c); (e) sample size; and (f) sample temperature. Precision and accuracy experiments were conducted. These included (2 sup n) factorial experiments and stepwise multiple linear regression analyses of the results. Asphalt content determinations equaling or bettering those of the conventional extraction technique were obtained in considerably less time.
Download or read book The Use of a Nuclear Asphalt Content Gauge written by Charles S. Hughes and published by . This book was released on 1968 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Nuclear Asphalt Content Gauges written by and published by . This book was released on 1989 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of the Troxler Model 3241 B Asphalt Content Gauge written by Richard J. Holmgreen and published by . This book was released on 1988 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents the results of an evaluation of the Troxler 3241-B Asphalt Content Gauge. Based on these findings, the asphalt content gauge is an accurate and reliable piece of equipment that can readily be used in the field environment. The importance of specific procedures and their influence on measurements obtained are discussed in detail.
Download or read book Nuclear Asphalt Content Gauge Study written by and published by . This book was released on 1988 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Asphalt Content of Hot Bituminous Mixes Using Nuclear Asphalt Content Gauges written by and published by . This book was released on 1991 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Asphalt Content Gauge Calibration Test Procedures written by Maine. Department of Transportation. Technical Services Division. Research and Development Section and published by . This book was released on 1991 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Determination of Asphalt Content and Characteristics of Bituminous Paving Mixtures written by John F. Adam and published by . This book was released on 1988 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Precision and Accuracy of Nuclear Asphalt Content Gauges in Determining Asphalt Content in Asphaltic Concrete Pavement written by Anthony J. George and published by . This book was released on 1988 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Asphalt Content Determination Manual written by Samuel Harley Carpenter and published by . This book was released on 1990 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Non nuclear Density Gauges for HMAC written by Stephen Sebesta and published by . This book was released on 2003 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes research efforts to determine if commercially available non-nuclear density gauges can be used for TxDOT's density profile and joint density testing procedures. Researchers conducted testing with a Troxler 3450 nuclear gauge (operated in the thin-lift mode) and the Pavetracker (PT) and Pavement Quality Indicator (PQI) non-nuclear gauges. In a laboratory setting, research showed all the gauges could be affected by mix temperature, where gauge readings typically decreased with decreasing mix temperature. All gauges readings were also impacted by moisture, with the nuclear gauge least impacted. The precision of all gauges in the lab was good, with standard deviations below 0.5 pcf with the non-nuclear gauges and less than 1.0 pcf with the nuclear gauge. Field-testing showed the PQI was a suitable alternative to the nuclear gauge for density profiling and joint density testing.
Download or read book Evaluation of a Nuclear Asphalt Content Gage written by Charles S. Hughes and published by . This book was released on 1970 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Troxler Model 2226 asphalt content gauge was evaluated in the laboratory and taken into the field where its results were compared to conventional reflux values. The precision as evaluated in the laboratory was found to be excellent - equivalent to .06% asphalt content with a 45 second count. The gauge does have to be recalibrated each time a different aggregate is used and as a practical matter should be recalibrated for each different mix type. Sample preparation is important and samples should be as uniform as possible. The accuracy appears to be as good as that of the reflux extractor. A recommendation for using the nuclear gauge is appended.
Download or read book Evaluation of Microwave Oven and Nuclear Asphalt Content Gauge written by John J. Germain and published by . This book was released on 1987 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This study was conducted to determine the feasibility of using a nuclear asphalt content gauge test procedure to measure the amount of asphalt in a bituminous mixture. A part of the vacuum and reflux test requires a moisture determination must be made; otherwise water extracted is shown as asphalt. Two advantages of using nuclear asphalt content gauges are: 1. Chemicals used in the vacuum extraction and moisture tests are very corrosive and consequently hazardous to handle. 2. The two procedures evaluated are simple and require less time than conventional procedures. Using these procedures may allow laboratory personnel more time for other duties. Results indicate the testing accuracy of the nuclear asphalt gauge when the temperature and density of the test specimen is controlled is at least as good as the vacuum or reflux extraction test procedure."--Technical report documentation p.
Download or read book Iowa Documents written by and published by . This book was released on 1986 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Refinement of Moisture Calibration Curves for Nuclear Gage written by David C. Wyant and published by . This book was released on 1973 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the last three years the Virginia Highway Research Council has directed a research effort toward improving the method of determining the moisture content of soils with a nuclear gage. The first task in this research was the determination of the correct moisture calibration curve for the nuclear gages being used (Troxler Models 227 and 2401). Forty-three soils sampled from the three physiographic areas of Virginia and having optimum moisture contents ranging from 5% to 40% were tested. It was found that for the Model 227 gage two calibration curves produced better results than did one calibration curve. With one curve the standard error was 2.7 pcf (0.04 g/cc), while for two curves the errors were 1.4 and 1.7 per (0.02 and 0.03 g/cc), which are judged to be acceptable for compliance testing. From an investigation of the physical and chemical properties of the soils tested it was concluded that the separation of the two curves could be based on optimum moisture content, and that the separation value should be 21%. At this point in the study the testing of the Model 227 gage was discontinued because the Virginia Department of Highways had replaced all of these gages with the Model 2401. The Model 2401 gage requires only one calibration curve, which has a standard error of 1.7 pcf (0.03 g/cc). Using this gage and its single calibration curve, five moisture standards were developed. A zero moisture content standard was developed by using dry C-190 sand, and four standards were developed by mixing different portions of either MgSO4 7 H2O or Na3PO4 12 H2O with Ottawa silica C-190 sand. These standards had respective moisture contents of 9.3, 16.1. 21.0, and 25.8 pcf (0.15, .26, .34 and .41 g/cc). The curve of best fit for these standards had a standard error of only 0.57 pcf (0.01 g/cc). Also the curve was approximately parallel to the curve previously determined from the soils. At approximately 25 pcf (0.40 g/cc) moisture content, the curve from the standards gives a moisture content about 2 pcf (0.03 g/cc) higher than the curve from the soils; and at around 5 pcf (0.08 g/cc) moisture content, the former gives a moisture content about 1 pcf (0.02 g/cc) higher than does the latter. The manufacturer's curve generally gives a lower moisture content than does either of the other two curves at the same count ratio.
Download or read book Methods of Sampling and Testing Asphalt written by Standards Australia (Organization) and published by . This book was released on 2013 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
