Tomasz E. Burghardt, A. Pashkevich, Kevin M. Wenzel
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A study of premium glass beads for road marking materials
Road markings are a necessary safety feature on almost all roads. For appropriate performance they must be reflectorised with glass beads. To demonstrate the differences between traditional and modern thin-layer road marking solutions, four road marking systems were compared in the field. Based on measurements of retroreflectivity, influence of glass beads and paint on service life was estimated. The use of high-performance waterborne paint reflectorised with premium glass beads permitted for over sixfold extension of durability. Financial analysis demonstrated that the considerable additional expense associated with purchase of modern materials was fully offset through increased service life: even 65% savings could be realised in the long term. Subsequent analysis of the used glass beads under optical and scanning electron microscopes provided information about their surface; intact and damaged glass beads were observed. Surprisingly, damaged glass beads were found to have crater-like surface features instead of the expected scratches.
期刊介绍：
The quarterly journal Roads and Bridges – Drogi i Mosty is published by the Road and Bridge Research Institute since September 2012 as a bilingual English-Polish journal. From 2002 to 2012 the journal was printed under the title Drogi i Mosty. The journal mission is to promote current achievements in science and technology in the field of road and bridge engineering. The journal is intended as a forum of the exchange of innovative concepts and solutions between the researches from different countries. Original scientific and technical papers in the field of civil engineering and related engineering sciences are published. The scope of Roads and Bridges – Drogi i Mosty includes design, construction, maintenance and safe use of roads, bridges, airports and other transportation structures.
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