Review of ultra-thin overlay asphalt concrete application and development. (English)
In: China Sciencepaper, Jg. 15 (2020-04-01), Heft 4, S. 425-431
academicJournal
Zugriff:
In view of the problems such as the selection of raw materials, technical performance indexes and unreasonable requirements in ultra-thin overlay physical engineering, this paper reviews the specifications of ultra-thin overlay in main countries at home and abroad, comparing and evaluates the technical index requirements and grading range, and gives the suggestions on the raw materials, grading range and technical index requirements of ultra-thin overlay asphalt concrete based on the application investigation of the physical engineering, it provides a reference for the engineering application of ultra-thin overlay asphalt concrete. The results show that the thickness of 20-25 mm for ultra-thin overlay is recommended as general application. The styrene-butadiene-styrene block copolymers (SBS) modified asphalt of 4.8%-5.3% is suggested for producing the ultra-thin overlay asphalt mixtures. Tack coat is recommended to utilize cationic modified emulsified asphalt. In addition, the technical performance requirements of residual stability ratio of immersed Marshall test ≥85%, residual strength ratio of freeze-thaw split test ≥80%, dynamic stability ≥3 000 times/mm, tensile strain ≥2 500 με, and texture depth within 0.8-1.5 mm are proposed as recommended indexes. The determination of reasonable raw materials, technical indicators and performance parameters is critical to the quality of physical engineering. [ABSTRACT FROM AUTHOR]
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Titel: |
Review of ultra-thin overlay asphalt concrete application and development. (English)
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Autor/in / Beteiligte Person: | Ouming, XU ; Zhifei, CAO ; Mingyue, LI ; Song, WANG |
Zeitschrift: | China Sciencepaper, Jg. 15 (2020-04-01), Heft 4, S. 425-431 |
Veröffentlichung: | 2020 |
Medientyp: | academicJournal |
ISSN: | 2095-2783 (print) |
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