Characteristics of Base Friction for Concrete Pavement Structure in China: Experimental Study
The restraint between the slab and the base of a concrete pavement structure is an important factor in the design of a concrete pavement. Excessive restraint can lead to unexpected distresses because of the daily cycle of ambient thermal influence and the changing moisture conditions that are ultimately detrimental to the performance of a pavement. Evaluation of base friction is needed for configuring joint sealing, slab thickness, and reinforced steel. The semirigid base, made mostly of cement-stabilized crushed stone, is widely used as the typical base for cement concrete pavement in China. Usually, a polythene sheet is placed between the concrete slab and the base to smooth the interface. In some cases, geotextiles and an asphalt bond breaker may be used to reduce friction. A series of push-off tests was performed under various conditions to study the characteristics of base friction for a typical concrete pavement in China. A polythene sheet, a geotextile, emulsified asphalt, and asphalt bond breakers of three thicknesses (2, 4, and 6 cm) were placed between concrete slabs and semirigid bases. Concrete slabs were also cast directly on the base with no bond breaker to determine the influence of these factors on the characteristics of base friction. Factors that could affect the behavior of a concrete slab under frictional drag, including rate of movements, slab thickness, and number of movement cycles, were investigated.
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Availability:
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Authors:
- Li, Sili
- Tian, Bo
- Niu, Kaimin
- Sun, Zhengfu
- Zhou, Wenhuan
- Publication Date: 2013
Language
- English
Media Info
- Media Type: Print
- Features: Figures; Photos; References; Tables;
- Pagination: pp 107–112
- Monograph Title: Pavement Management 2013, Volume 2
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Serial:
- Transportation Research Record: Journal of the Transportation Research Board
- Issue Number: 2367
- Publisher: Transportation Research Board
- ISSN: 0361-1981
Subject/Index Terms
- TRT Terms: Base course (Pavements); Concrete pavements; Geotextiles; Joint sealing; Moisture content; Pavement design; Pavement distress; Slabs; Thickness
- Geographic Terms: China
- Subject Areas: Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways;
Filing Info
- Accession Number: 01475546
- Record Type: Publication
- ISBN: 9780309286909
- Report/Paper Numbers: 13-2291
- Files: PRP, TRIS, TRB, ATRI
- Created Date: Mar 14 2013 12:46PM