A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Development of UK Proprietary Asphalt Surfacing Skid Resistance and Texture
This paper considers the development of proprietary asphalt surfacing properties used in the United Kingdom due to trafficking. The project aimed to determine whether asphalt mixes made with lower PSV aggregate in smaller nominal-sized asphalt mixes could provide adequate levels of in-situ performance compared with the traditional use of higher PSV aggregate and 14-mm nominal-sized mixes. It compared SCRIM and GripTester data from full-scale road trials with laboratory Wehner Schulze laboratory data measured using asphalt laid at the road trial. The proprietary mixes were 14-mm, 10-mm, and 6-mm maximum aggregate size made with porphyry and quartz granite aggregate. Based on their PSV these aggregate sources would typically not be used on heavily trafficked roads in the UK. Surface texture was monitored using laser sensor during SCRIM assessment. In-situ testing found good levels of skid resistance for all mixes over the last four years since installation. The optimum nominal mix size was 10 mm. The 14-mm mixes had a noticeable drop in texture depth whereas the smaller nominal size mixes remained relatively unchanged. The Wehner Schulze was found to rank the mixes similar to in-situ measurement in contrast to PSV, which did not. A model was developed to predict in-situ skid resistance based on Wehner Schulze data.
Development of UK Proprietary Asphalt Surfacing Skid Resistance and Texture
This paper considers the development of proprietary asphalt surfacing properties used in the United Kingdom due to trafficking. The project aimed to determine whether asphalt mixes made with lower PSV aggregate in smaller nominal-sized asphalt mixes could provide adequate levels of in-situ performance compared with the traditional use of higher PSV aggregate and 14-mm nominal-sized mixes. It compared SCRIM and GripTester data from full-scale road trials with laboratory Wehner Schulze laboratory data measured using asphalt laid at the road trial. The proprietary mixes were 14-mm, 10-mm, and 6-mm maximum aggregate size made with porphyry and quartz granite aggregate. Based on their PSV these aggregate sources would typically not be used on heavily trafficked roads in the UK. Surface texture was monitored using laser sensor during SCRIM assessment. In-situ testing found good levels of skid resistance for all mixes over the last four years since installation. The optimum nominal mix size was 10 mm. The 14-mm mixes had a noticeable drop in texture depth whereas the smaller nominal size mixes remained relatively unchanged. The Wehner Schulze was found to rank the mixes similar to in-situ measurement in contrast to PSV, which did not. A model was developed to predict in-situ skid resistance based on Wehner Schulze data.
Development of UK Proprietary Asphalt Surfacing Skid Resistance and Texture
Artamendi, I. (author) / Phillips, P. (author) / Allen, B. (author) / Woodward, D. (author)
2013 Airfield & Highway Pavement Conference ; 2013 ; Los Angeles, California, United States
Airfield and Highway Pavement 2013 ; 865-874
2013-06-18
Conference paper
Electronic Resource
English
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