Specification for concrete pavement carving

The surface structure must be constructed by napping, grooving, pressing or grooving.

The pavement must be textured by methods such as napping, grooving, flattening or grooving, and the texture depth should meet the requirements of the completion acceptance schedule. Concrete precast blocks can be rectangular blocks or special-shaped blocks. The length of the rectangular block shall be 200 ~ 250 mm, the width shall be100 ~125mm and the thickness shall be 80 ~150mm. The thickness of sand cushion under precast block should be 30 ~ 50 mm

The surface layer shall be ordinary cement concrete with joints. When the plane size of the surface slab is large or irregular, the underground facilities are buried under the pavement structure, and located in the subgrade section where uneven settlement may occur, such as high fill, soft soil foundation, filling and excavation boundary section and so on. , reinforced concrete surface should be used with dowel bar.

Extended data:

Concrete pavement requirements:

1, the calculated thickness of open graded asphalt stabilized macadam or cement stabilized macadam drainage base should meet the needs of eliminating surface water design seepage. The design thickness of the drainage base shall be rounded to 10mm according to the calculated thickness, and then increased by 20 mm. ..

2. The suitable compaction thickness of various base and subbase structural layers should be determined according to the nominal maximum particle size of the selected materials and the requirements of compaction effect. When the design layer thickness of the base or subbase exceeds the appropriate compaction thickness range of the corresponding materials, it is appropriate to pave and compact in layers.

3. The RCC base shall be provided with joints corresponding to the concrete surface. When the flexural strength of lean concrete base is greater than 1.5MPa, transverse contraction joints corresponding to the surface layer should be set; When the paving width is greater than 7.5m, longitudinal contraction joints shall be set.

Standard Network-Code for Design of Highway Cement Concrete Pavement