Common problems in carbon fiber cloth reinforcement engineering are listed:
1. The carbon fiber cloth and the carbon fiber glue used together with it are unqualified;
2. The surface treatment of the concrete structure during construction does not meet the requirements;
3. The method of using structural adhesive ratio, stirring, etc. does not meet the specifications for the use of structural adhesives, or the construction method of bonding carbon fiber cloth does not meet the requirements of construction specifications.
Due to the existence of these problems, the total effective bonding area of the concrete is less than 95% of the total bonding area, and small bubbles exist on the surface of the carbon fiber cloth.
Solutions to common problems in carbon fiber cloth reinforcement engineering:
1. Material selection and procurement should select materials that meet the requirements according to the design and specification requirements of the design institute, and the procurement plan of the materials must be purchased after being reviewed by the technical person in charge; and the qualified materials should be selected before the construction. Sampling inspection is carried out to ensure that the quality of the materials meet the design requirements.
2. For grinding treatment of the base surface of the concrete structure, firstly the loose concrete is removed, and after repairing with the repair mortar, the construction is carried out. It should be noted that during this process, the mortar should be dried before the next step can be carried out.
3. When the construction process does not meet the specifications, it is necessary for the professional to carry out the technical disclosure.
Matters needing attention when attaching carbon fiber cloth:
(1) The concrete to which the carbon fiber material is pasted should be kept dry, and the surface moisture content should not exceed 4%.
(2) After the preparation of the carbon fiber cloth is finished, the carbon fiber cloth must be infiltrated with the supporting structural glue, so that the structural glue can penetrate into the gap between the carbon fiber monofilaments as much as possible to improve the work performance between the monofilaments.
(3) When the structural adhesive used in the pasting construction is completed, it should be used within the time specified in the manual. Otherwise, the quality of reinforcement will be affected.
(4) Carbon fiber is a conductive fiber. Avoid contact with the power supply during construction to prevent electric shock.
Editor: Nanjing Mankate, if you need to reprint, please indicate the source!
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