Carbon fiber reinforcement construction test has an important inspection item --- carbon fiber and substrate concrete positive pull bonding test.

This test is the most direct and convincing quantitative inspection method, and it is also the ultimate basis for whether the quality of the project is qualified. Each carbon cloth paste project in actual projects must conduct on -site sampling tests regardless of the amount of engineering.

We have said that the standards of this sample test result include two indicators: bonding strength and destruction form. Let's specifically tell what the form of destruction is, and how to determine the inspection qualification.

The adhesion intensity should be greater than the requirements of the normative indicators and destroy it in the concrete aggregation

The test results meet the requirements of the above intensity indicators, and it can be determined as qualified at the concrete grassroots. If the bonding strength is less than the specification indicators but it is still destruction of the concrete, if it is not an occasional phenomenon, it means that the intensity level of the actual grassroots concrete may be different from the original design file display.

Adhesive or fibrous layer in intra -destruction

(1) Destruction occurs in the adhesive, indicating that there is a problem with the quality of the adhesive, or the operator is not used properly.

(2) Destroy fibrous fibrous fibrous fibrous fibrous fibrous fiber in the fiber layer. It is said that the construction operation is improperly pasted, and the gas does not discharge or the adhesive is not fully involved in the fiber bundle.

The sample of the adhesive or fiber layer of the adhesive or fiber can be judged as unqualified.

Inter -layer destruction

(1) Adherence of adhesion between the rubber layer indicates that the construction of the bottom glue and the fiber paste layer does not do it according to the standard construction requirements. For example, the fiber construction is not re -polished when the fiber construction is pasted.

(2) Destruction occurs on the side of the concrete base layer, but it is just the surface layer of mortar fell, and there is no aggregate. When this situation occurs, the detection value of the positive bonding strength is very low, and it is not necessary to judge the destruction of the concrete.

The sample that is damaged between the occurrence can be judged as unqualified.

Mixed destruction

A combination of a variety of destructive forms has become a mixed destruction, and it occurs from actual inspection on the spot.

The criteria for the test results of the test results when the mixed destruction occurs is: the bonding strength is greater than the requirements of the indicator, and the area of the destruction of the concrete accounted for more than 85%of the sample bonding area, otherwise it is unqualified.

The positive tension of fiber compound and concrete is a guarantee of the quality of carbon fiber construction, but it is necessary to pay attention when the test is performed:

1. This is a destructive test. The measuring point should be selected outside the largest area.

2. When paste the metal test block, it should be ensured that the lines of the test block are vertically perpendicular to the paste surface.

3. It must be confirmed that the pre -cut seam is deep into the depth of the concrete. Otherwise, the fiber connection will cause serious deviations in the test results.

4. The damaged parts after the test should be repaired in time.