Structural Crack Treatment Of Concrete Columns

Structural Crack Treatment Of Concrete Beams(1)

Structural Crack Treatment Of Concrete Beams(2)

Structural Crack Treatment Of Concrete Slabs

List various possible cracks in a simple and intuitive manner according to the top, bottom, side, and other positions of the floor slab, comprehensively analyze the nature, causes, impact on the structure, and treatment methods of each crack, for reference when detecting and judging cracks in concrete building structures.

1.

Cross -mid -bottom crack

The bottom of the slab, the thickness does not penetrate

crack?

Fierce crack

Construction crack

reason?

Positive bending moment

Demolition

Insufficient concrete strength

Lack of tendon

Occascular overload

effect?

Affect the appearance

Basically does not affect the carrier

Insecurity

Durability

how to deal with cracks?

Cover

Reinforcement when necessary

2.

Cross edge upper crack

Relatively vertical, slightly wedge-shaped, but not interconnected

reason?

Negative bending moment tension

Dismantling the mold too early

Insufficient concrete strength

Reinforcement displacement

Accidental overload

crack?

Stress cracks

Construction cracks

Residual cracks

effect?

Appearance defects

It basically does not affect the bearing capacity

Insecurity

Affects durability

how to deal with cracks?

Covering cracks

Reinforcement treatment if necessary

3.

Cracks on both ends of the cross edge

Vertical discontinuity, development trend towards stagnation at the bottom of the slab

Floor slab side, surface, and bottom

reason?

Settlement difference

Tensile cracking

Constrained bending moment caused by relative displacement

crack?

Forced displacement causes stress cracks

Construction cracks

Residual cracks

effect?

Appearance defects

May affect bearing capacity

Insecurity

Affects durability

how to deal with cracks?

Covering cracks

Reinforcement treatment if necessary

4.

Mid upper crack

Short water crack on the side of the concrete crushing slab

Floor slab side and surface

crack?

Stress cracks

Construction defects

reason?

Insufficient strength in the compression zone

Reinforcement displacement

effect?

Accidental overload

Signs of insufficient bearing capacity

how to deal with cracks?

Possible development of brittle bending failure

Crack treatment and timely reinforcement

5.

Weak areas in the mid span of a long slab

Horizontal cracking along the slab, through the thickness of the slab

slab side,  side,  surface

crack?

Temperature shrinkage cracks

Construction and maintenance cracks

reason?

Constrained tensile cracking caused by temperature and shrinkage

effect?

The appearance affects the sense of insecurity

Causing leakage

It basically does not affect the bearing capacity

Affects durability

how to deal with cracks?

Timely sealing of cracks

Cover it up

Waterproof and anti-seepage treatment if necessary

6.

Reinforcement area of floor slab surface

Cracking along the direction of steel reinforcement configuration

slab surface

reason?

Failure to perform secondary pressure plastering is hindered by cracking of the steel bars in the direction of the reinforcement

Concrete segregation settlement

crack?

Construction cracks

effect?

It basically does not affect the bearing capacity

Affects durability

Appearance has a certain impact

how to deal with cracks?

Cover up crack treatment

7.

Unreinforced panel surface area

Irregular turtle cracks

Floor slab surface

crack?

Construction cracks

Shrinkage cracks

effect?

It basically does not affect the bearing capacity

Affects durability

reason?

Appearance has a certain impact

Concrete segregation settlement

Cracking not caused by secondary pressure coating

Concrete drying shrinkage

how to deal with cracks?

Cover up crack treatment

8.

Surrounding area of pillars

Intermittent circular cracks along the column circumference

Floor slab surface

reason?

The slab thickness is too thin

Insufficient shear reinforcement

Low concrete strength

Accidental overload

crack?

Stress cracks caused by punching and shearing

Shrinkage cracks

effect?

Has an impact on load-bearing capacity

May develop into brittle failure

how to deal with cracks?

Timely reinforcement

9.

Mid span core area

Concrete crushing and steel reinforcement buckling

slab surface

crack?

Stress cracks

Construction cracks

effect?

Insufficient load indicator

May develop into brittle failure

Positive bending moment compression

reason?

Low concrete strength

Accidental overload

how to deal with cracks?

Timely reinforcement

10.

Corner area of bidirectional slab

Diagonal cracks at the corners

Floor slab surface and bottom

reason?

Bilateral negative bending moment tension

Insufficient strength

Negative bending moment displacement

Insufficient reinforcement

crack?

Stress cracks

Construction cracks

effect?

Not affecting load-bearing capacity

Affects durability

how to deal with cracks?

Reinforcement if necessary

Repair cracks

11.

Cross edge area along the support

Horizontal cracks not penetrating

Floor slab surface

reason?

Negative bending moment tension

Dismantling the mold too early

cracks?

Stress cracks

Construction cracks

Residual cracks

effect?

Appearance defects

May affect bearing capacity

Insecurity

Affects durability

how to deal with cracks?

Covering cracks

Reinforcement treatment if necessary

12.

Along the embedded pipeline

Straight line type along the pipe

Floor slab bottom

cracks？

Construction cracks

effect?

Appearance defects

Not affecting load-bearing capacity

Affects durability

reason?

Concrete too thin

Pipeline layout in protective layer

how to deal with cracks?

Covering cracks