Abstract
Prestressed concrete pavement can reduce slab thickness, eliminate transverse joints and enhance durability compared to traditional concrete pavement. Traditional prestressing or precast prestressing in the longitudinal direction requires additional space for anchorage and adds more joints. This study proposed an oblique prestress concrete pavement, in which prestressed tendons were distributed with an angle to the road direction so that the prestress can be applied in both the transverse and longitudinal directions. The detailed design of the oblique prestress concrete pavement, including the selection of raw materials, design of cement concrete, anchorage area, size and distribution of prestressed tendons, stress analysis within the concrete slab, sliding layer, side reinforcement, and regular reinforcement at top and bottom are all included in this study. The slab thickness, diameter, distribution angle, and spacing of tendons were obtained based on the stress analysis to meet the requirement of fracture criteria and fatigue criteria. A demonstrative road pavement section, which has performed well after three years of traffic opening, was constructed according to the design. A step-by-step description of the construction was also presented in the study.
Highlights
The earliest application of prestressed concrete pavement was in as early as the 1940s
Prestressed concrete pavement as a composite structure should be properly designed before implementation
The design should take traffic condition, or cumulative equivalent axle repetitions in the service life, into account, and the dimension of the concrete slab should be determined
Summary
The earliest application of prestressed concrete pavement was in as early as the 1940s. Sci. 2018, 8, 607 resistance and reduced slab thickness; while the prestressing increases the cost of the materials and construction, the reduction in slab thickness and transverse joints can compensate some of this cost [1,5,6]. According to El-Reedy, the prestressed concrete slab with 200 mm thickness can possess equivalent design life as the traditional concrete slab with 355 mm thickness [7]. In another airfield runway study, it was determined that the thickness of the concrete slab can be reduced by half when prestressing is applied [8]
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