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PULL OUT TEST (Adhesive test & tension Strength)

The pull out test was carried out to determining the adhesive strengthen on the concrete structure and the

tension strength of the existing concrete where the R.C deck slab required for the strengthening works of

carbon fiber E200 with 150mm width and 1.4mm thickness.

The tester was able to measure the adhesive strength of primer applied to the carbon fiber or coating

applied.

The pull out test was required in the frequent of 1per 100m run or 2 nos per project. For the current

project each span was required 2 nos of pull out test.

The surface preparation of the exiting deck slab was done on 2 days before the pullout test. The selectedlocation was marked and grinded to the course aggregates. Clean with the solvent clean (thinner) toensure the surface was free of dust and un-sound concrete.

The dollies used was 50mm diameter each 4 nos of the testing. The sikadur- 31 CF normal was used tobond the dolly on the soffit of slab.

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Frequent of test = 2 nos per project or 100m per 2 nos samples

Failure Mode (A= Existing Substrate , B= Repair material , C= dolly )

Failure Mode 1 100% Bond failure at dolly (100% B/C)

Failure Mode 2 100% Cohesive failure of repair material (100% B)

Failure Mode 3 100% Bond failure of repair material (100% A/B)

Failure Mode 4 Partial Bond failure and cohesive failure of repair material (.....% A/B,....%B)

Failure Mode 5Partial Bond failure and cohesive failure of existing substrate (.....%A/B, .....%A)

Failure Mode 6 100% Cohesive failure at dolly (100% A)

A = Existing Substrate ( R.C Slab)

B = Repair Material

C = dolly

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Ensure all crack surfaces and seal entire working surface was fully sealed to avoid leakage during the

injection process.

Installed the pipe to the surface packer and tighten it, apply the pressure slowly and observed the resin

epoxy injected into the crack through the packer until the epoxy overflow from the nearby packer.

Clamp the O-ring to tighten the surface packer to prevent the epoxy resin

leak. After the resin epoxy was set. The epoxy adhesive which used to

cover the entire crack line to the sealing purpose was removed. The post

inspection can be carried to observe the sealing works.

Pressure Pump

ManualEpojet LV

(grout material)