Crack repair syringe use methods and precautions
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1. This method is suitable for repairing cracks in concrete structures and restoring their integrity and function.
2. For the cracks caused by the lack of structural bearing capacity, in addition to the treatment of this method, corresponding reinforcement measures shall be taken to ensure the safety and reliability of the structure.
3. For static cracks, when the crack width is less than 0.3mm, the crack surface can be closed with epoxy mortar; when the crack width is greater than or equal to 0.3mm, epoxy resin slurry is also suitable for perfusion. For the active cracks, the cracks should be repaired after the analysis and control of cracks to stabilize them.
Second, the process of crack processing → burying plastic nozzle → sealing seam → configuration glue → gluing → sealing inspection → check the crack treatment
1, the surface treatment method. For cracks on concrete structures with cracks less than 0.3mm, remove dust, scum and loose layers on the surface of cracks with a wire brush or other tool. Wipe the sides of the cracks with 20 to 30mm with alcohol and keep them dry.
2, chiseling method. For cracks in the concrete structure where the crack is greater than or equal to 0.3 mm, a "V" shaped groove is cut along the crack using a diamond plate or sanding plate, and the concrete chip dust is removed with a wire brush and compressed air.
Third, buried injection nozzle
1. Plastic injection nozzles are to be laid at intersections of cracks, wide places, ends, and penetrations of cracks. The spacing is less than 1mm when the seam width
The time is 350~500mm; when the crack is more than 1mm, it is 500~1000mm. In a crack must have a rubber nozzle, exhaust nozzle, a plastic nozzle.
2. When burying, first apply a layer of epoxy glue with a thickness of about 1mm to the chassis of the rubber nozzle and glue the glue inlet of the rubber nozzle to the predetermined position.
3, cracks that require sealing can be closed with epoxy resin clay. Apply a layer of epoxy resin mortar about 1mm thick and 20-30mm wide on the crack. When the mud is applied, it is necessary to prevent the generation of small holes and air bubbles. It is necessary to scrape the flat and ensure the sealing is reliable.
4. After the cracks are sealed, the epoxy mortar has a certain strength to conduct pressure test leaks and check the sealing effect. A layer of soapy water shall be applied to the cracks at the front of the leak test, and the air shall be pressed from the rubber filling nozzle. Where the leaks occur, it shall be repaired and sealed until no leakage occurs.
5, configuration glue. According to the manufacturer's recommendation ratio, the proportioning test is performed, and the appropriate ratio is selected according to the actual situation on the site. The amount of glue to be dispensed at a time must be determined by the gel time and the speed of the glue.
6, plastic irrigation is one of the key processes of construction, should ensure the quality of glue.
(1) The plastic injection device is inspected before filling, and it can be used only if it is normal.
(2) According to the size of the crack area, single-space irrigation or district group hole filling can be used. Filling a crack can be from one end to the other.
(3) When the glue is to be filled, the core valve should be closed immediately when the next exhaust nozzle is out of the glue, and the glue is fed from the next exhaust nozzle.
(4) The sign of glue-stopping is that the glue-absorption rate is less than 0.1L/min, and the glue injection can be stopped by continuing the injection for several minutes.
(5) Immediately after the gluing, remove and clean the gluing equipment to prepare for the next use.
7. When the glue in the seam reaches the initial coagulation without efflux, the injection nozzle can be removed, and then the mouth of the irrigation nozzle can be wiped and sealed with oxygen clay.
8, after the end of gluing, should check the reinforcing effect and quality, found that defects should be remedied in a timely manner to ensure project quality.
Fourth, pay attention to matters
1. The structural glue has irritation to the skin. Some individuals have an allergic reaction. After the glue is cured, it is not easy to remove. After the human body is in direct contact, it is rinsed with clean water. If it accidentally splashes into the eyes, rinse with plenty of water and immediately consult a doctor. Construction workers should pay attention to proper labor protection, such as helmets, work clothes and gloves.
2, the higher the ambient temperature, the greater the amount of each glue, the shorter the operating time. Estimate the amount of glue used during each use period to avoid unnecessary waste.