Mixture Performance Analysis and Engineering Application of High Strength and Toughness Wearing Course STC-8
Publication: International Conference on Road and Airfield Pavement Technology 2023
ABSTRACT
In order to recover the skid resistance of asphalt pavement of expressway, the old mixture layer 1.5 cm below the road surface was replaced by the ultra-thin wearing course modified with high strength and toughness additive (STC). Firstly, the mix ratio design of STC-8 wearing course mixture was carried out, and the mixture performance of STC-8 mixture was analyzed. Then, according to the replacement depth, the specific technical scheme of STC-8 wearing course was put forward. The construction technology of STC-8 wearing course was introduced, and the application effect was verified by the engineering practice. For the STC-8 mixture, the dynamic stability was more than 10,000 cycles/mm at high temperature of 60℃, and the bending failure strain exceeded 2,800 με at low temperature of minus 10℃, also showing excellent anti-aging and freeze–thaw resistance. The strength and toughness of STC-8 mixture was outstanding. After paving STC-8 wearing course, the texture depth of road surface was more than 0.6 mm, and the British pendulum number (BPN) of road surface was more than 80. The skid resistance of road surface was effectively recovered by paving STC-8 wearing course. The STC wearing course can be used as a potential technical measure to recover the skid resistance of road surface.
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Information & Authors
Information
Published In
International Conference on Road and Airfield Pavement Technology 2023
Pages: 429 - 438
History
Published online: Feb 6, 2024
ASCE Technical Topics:
- Asphalt pavements
- Design (by type)
- Engineering fundamentals
- Highway and road design
- Highway and road management
- Highway transportation
- Highways and roads
- Infrastructure
- Load and resistance factor design
- Load factors
- Material mechanics
- Material properties
- Materials characterization
- Materials engineering
- Measurement (by type)
- Mixtures
- Pavements
- Skid resistance
- Structural design
- Temperature effects
- Temperature measurement
- Toughness
- Transportation engineering
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