Evaluation of Nonnuclear Density Tests on Hot Mix Asphalt Segregation - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Evaluation of Nonnuclear Density Tests on Hot Mix Asphalt Segregation write by Chieh-Min Chang. This book was released on 2007. Evaluation of Nonnuclear Density Tests on Hot Mix Asphalt Segregation available in PDF, EPUB and Kindle. 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.
Segregation in Hot-mix Asphalt Pavements
Segregation in Hot-mix Asphalt Pavements - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Segregation in Hot-mix Asphalt Pavements write by Mary Stroup-Gardiner. This book was released on 2000. Segregation in Hot-mix Asphalt Pavements available in PDF, EPUB and Kindle.
Evaluation of the Nonnuclear Density Gauge for Quality Control of Hot-mix Asphalt
Evaluation of the Nonnuclear Density Gauge for Quality Control of Hot-mix Asphalt - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Evaluation of the Nonnuclear Density Gauge for Quality Control of Hot-mix Asphalt write by John W. Henault. This book was released on 2010. Evaluation of the Nonnuclear Density Gauge for Quality Control of Hot-mix Asphalt available in PDF, EPUB and Kindle.
Evaluation of Indicator Tests to Identify Segregation in Hot Mix Asphalt Pavements
Evaluation of Indicator Tests to Identify Segregation in Hot Mix Asphalt Pavements - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Evaluation of Indicator Tests to Identify Segregation in Hot Mix Asphalt Pavements write by Mohd Rosli Hainin. This book was released on 1996. Evaluation of Indicator Tests to Identify Segregation in Hot Mix Asphalt Pavements available in PDF, EPUB and Kindle.
Evaluation of Non-nuclear Density Gauges for HMAC
Evaluation of Non-nuclear Density Gauges for HMAC - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Evaluation of Non-nuclear Density Gauges for HMAC write by Stephen Sebesta. This book was released on 2003. Evaluation of Non-nuclear Density Gauges for HMAC available in PDF, EPUB and Kindle. 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.
