Good Bond Conditions Concrete

5.2.2 Bond

5.2.2 Bond Bond conditions

P(1) The quality of the bond depends on the surface pattern of the bar, on the dimension of the member and on the position and inclination of the reinforcement during concreting.

(2) For normal weight concrete, the bond conditions are considered to be good for:

a) all bars, with an inclination of | 45° to 90° | to the horizontal, during concreting [Figure 5.1 a)];

b) all bars which have an inclination of | 10° to 45° | to the horizontal during concreting and are:

— either placed in members whose depth in the direction of concreting does not exceed | 250 mm | [Figure 5.1 b)],

— or embedded in members with a depth greater than | 250 mm | and when concreting is completed, are:

• either in the lower half of the member [Figure 5.1 c)]

• or at least | 300 mm | from its top surface [Figure 5.1 d)]

(3) All other conditions are considered poor.

Bond Stress
Figure 5.1 — Definition of bond conditions Ultimate bond stress

P(1) The ultimate bond stress shall be such that no significant relative displacement between the steel and concrete occurs under service loads, and that there is an adequate safety margin against bond failure.

(2) In conditions of good bond, the design values for the ultimate bond stress fbd are given in Table 5.3. In all other cases, the values in Table 5.3 should be multiplied by a coefficient 0.7.

Table 5.3 — Design values fbd (N/mm2) for good bond conditions (these values incorporate a Yc value equal to 1.5)

Table 5.3 — Design values fbd (N/mm2) for good bond conditions (these values incorporate a Yc value equal to 1.5)


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  • Ciriaco Endrizzi
    What is good and bad bond in euro code?
    2 years ago
    What is poor bond and good bond in rebar?
    2 years ago
  • elias
    What is favorable and unfavorable bond condition?
    1 year ago
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    What is a good bonding and poor bonding in rc detailing?
    1 year ago
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    How to know good or poor bond conditions rebar?
    1 year ago
  • outi
    How to differentiate good bad concrete in columns?
    11 months ago
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    Do need anchoragen good bond?
    9 months ago
  • Renato
    What the difference between good and bad bonding?
    7 months ago
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    What are good and poor bond conditions for lap lengths?
    7 months ago
  • wilibald
    Why good/poor bond is used in concrete eurocode?
    7 months ago
  • tranquillina
    How to keep concrete in good condition?
    7 months ago
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    6 months ago
  • Sebastian
    What is a poor bond (top layers)?
    6 months ago
  • Senay
    4 months ago
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    What is bond condition good and poor?
    4 months ago
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    What is favorable bond condition in steel reinforcement laps?
    4 months ago
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    What makes a good or bad concrete bond?
    2 months ago

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