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Slab crack repair
crack repair,externally bonded carbon fiber reinfroced polymer(CFRP) fabric
in order to prevent further corrosion and crack growth in the slab, grouting must be carried out for the cracked plates. At the same time, in order to prevent the failure of the stress concentration at the crack site, we should externally bonded carbon fiber reinfroced polymer(CFRP) fabric for the cracks
Project overview
The cracks occur in the slab, and the cracks are developed from the outside to the inside, and the cracks are formed in the part. After analysis, it is inferred that the cause of the formation is as follows:
(1) the steel bar is misplaced and the protective layer is too large, which causes the decrease of the structure bearing capacity to cause the crack.
(2) the upper part of the plate is not due to the negative bending moment, and the upper part of the plate is cracked.
(3) the expansion crack caused by the temperature stress.
In view of the above analysis reasons, in order to prevent further corrosion and crack growth in the slab, grouting must be carried out for the cracked plates. At the same time, in order to prevent the failure of the stress concentration at the crack site, we should externally bonded carbon fiber reinfroced polymer(CFRP) fabric for the cracks.
For repair crack
the materials:
HM-120ML crack repair adhesive
HM-120L crack injection adhesive
crack repair
crack inspection-crack treatments-embed pouring glue nozzle-seal crack-sealing check-prepare pouring crack adhesive-pour glue-conservation-examination and test
Externally bonded carbon fiber reinfroced polymer(CFRP) fabric
In this project, the cracks in the floor in the middle or end position of negative reinforcement, crack development from outside to inside, from the angle of considering structural safety, not through the cracks in the grouting, after must be reinforced with CFRP in the upper floor, cracks in the distribution range of 1600mm width along the stress direction of CFRP a layer of carbon fiber cloth, along the direction of crack width of CFRP strip attached to the edge of 200mm a; on the crack has opened, in the distribution of lower 1600mm crack width along the stress direction of CFRP layer, the distribution of upper 1000mm crack width along the stress direction of CFRP layer, along the direction of crack carbon fiber cloth attached to the edge of 200mm wide carbon fiber layering a must be reinforced with CFRP in the upper and lower floor in the end after grouting.
