Different concrete curbing styles have different specifications, requirements, and structures shape. This article will give you a detailed introduction to the different styles of curbing.
Here is the outline of this article.
Terms and definitions of different concrete curbing styles
A precast concrete boundary marker laid on the edge of a pavement or marking the boundary of a pavement.
Concrete flush curb
Concrete curb with the top surface flush with the road surface. There are marked lane road surface range, or located between the sidewalk and green belt to neaten the road, to protect the role of the edge of the road.
Concrete vertical curb
The top surface of the concrete curb above the road surface. There are marked lane range and guide the role of excluding water from the road.
Concrete gutter apron curb
A flat marker laid between the road surface and the concrete vertical curb.
Specifications of different concrete curbing styles
2.1.1 Beeline concrete curb flexural strength grade is divided into Cf3.5, Cf4.0, Cf5.0, Cf6.0.
2.1.2 Curve concrete curb and right angle concrete curb compressive strength grade is divided into Cc30, Cc35, Cc40, and Cc45.
Models and specifications
The straight curb is divided into H, T, R, F, and P, RA type according to its cross-section. For the preferred cross-section, specifications, see Figure 1. According to the consultation between supply and demand, other types and specifications of curbs can also be produced.
The abbreviations of various concrete curb styles are:
BCC-beeline concrete curb;
CCC-Curve concrete curb;
CFC – concrete flush curb;
CGA-concrete gutter apron curb;
CVC-concrete vertical curb;
RACC – right angle concrete curb
Requirements for different concrete edging styles
1. The concrete curb should have complete edges and corners, in good shape, smooth surface and no cracks through. The angles of the visible surface should have chamfered or curved corners. In addition to the angles composed of beveled, rounded and edge-cutting corners, all other corners should be right angles.
2. The thickness of the concrete curb surface layer, including the thickness of any part of the surface of the chamfered, curved corners, should not be less than 4mm.
3.2.1 Beeline concrete curb flexural strength
Beeline concrete curb should be tested for flexural strength and should comply with the provisions of Table 1(Unit in MPa).
|Minimum value of single piece||≥2.80||3.20||≥4.00||≥4.80|
3.2.2 Curve concrete curb and right angle concrete curb compressive strength
Curve concrete curb and right angle concrete curb should be tested for compressive strength and should comply with the provisions of Table 2 (Unit in MPa).
|Minimum value of single piece||≥24.0||≥28.0||≥32.0||≥36.0|
3.3.1 Water absorption rate
Water absorption rate of concrete curb should not be greater than 6.0%.
3.3.2 Frost resistance and salt freezing resistance
Concrete curb in cold areas should conduct frost resistance test by slow freezing method. The quality loss rate of the concrete curb after 50 freeze-thaw tests should be no greater than 3.0%.
Concrete curb in cold areas when using de-icing salt for snow removal in winter and in saline areas should be tested for salt freezing resistance. The average mass loss of the concrete curb by ND28 salt frost resistance test should be no greater than 10kg/m; the mass loss of any one specimen should be no greater than 1.5kg/m2.
When salt frost resistance test is required, the frost resistance test may not be done.
Packaging, transportation, and storage of different types of curbing
The product should be protected. When shipped with lifting brackets, they should be tied firmly.
When loading and unloading, the curbs should be facing each other, placed firmly and tightly. Effective measures should be taken to protect the visible surface of the product: when transporting it should avoid colliding with each other; when loading and unloading, it is strictly prohibited to throw the product; when transporting in bulk, it is strictly prohibited to dump the unloading.
The concrete curbs storage yard should be flat, solid, and clean. It should be stacked by category, type, specification, and strength level. Stacking should be stable, neat, and the height should not exceed 1.5m.
Structure shape of different types of curbing
The concrete curb is divided into beeline concrete curb and curve concrete curb according to its structure shape. Its top surface, upper top surface, lower top surface, side surface, and upper side surface are the visible surface after being finished.
Beeline concrete curbs include vertical curbs, flush curbs, right angle concrete curbs, and T-shaped curbs.
The names of its parts are shown in Figures 5.1 and 5.2.
3. Bottom side
4. Back side
5. End side
1. Top side
2. Upper top surface
3. Bottom side
4. Back side
5. End side
6. Lower top side
7. Lower side
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