HYDRAULIC FACILITY REPAIR
Applicability
Most existing hydraulic structures in Russia were built 50 - 180 years ago and only 31% of the structures possess a normal safety level, the rest of them possess low to dangerous safety levels.
Wear and tear of most structures occurs due to material corrosion influenced by natural and industrial factors.
Shotcreting
A type of concreting where concrete mixture is applied to a work surface using compressed air. Shotcreting advantage over other methods lies within complete mechanization of processes incorporated into a single working operation - concrete transportation, laying and compaction. As a result of shotcreting a soil stabilizing coating possesses unique properties:
- increased mechanical strength (В 60-80 / Btb 3,6-6,0)
- frost resistance F 400-1000
- waterproofing > W 12
- working surface adhesion > 2.0 MPa
- increased crack resistance
Defects
Repair work stages
Hydroabrasive surface preparation
Procedure peculiarities
- no microcracks caused in concrete matrix structure
- metal reinforcement is not damaged
- metal reinforcement is cleaned by pressurized water application
- only damaged concrete is eliminated
- industrial equipment enables to reduce total expenses for entire repair works
Shotcrete application
