Syringe injectors are low pressure injectors used to repair cracks in concrete structures. Low-pressure injection method improves work efficiency by simultaneously injecting epoxy resin into small deep crack areas time. It also has a scale on the surface so that you can confirm the injection Observe with naked eyes.
This method uses surface tension and water absorption capillary action to make the grouting material penetrate into the small cracks without power supply. Traditional grouting methods mostly use high-pressure grouting, so the back pressure inside the cracks often leads to the rupture of the sealing material and the penetration of the grouting material, which hinders the deep infusion of the grouting material. With syringe grouting, the cracks of the concrete structure can be perfectly grouted at the same time without causing large-scale damage.
Work process should be determined by checking in advance the condition, width, depth of cracks.
Remove dust or dirt from the area to be sealed with a wire brush and remove dirt from the surface by using a detergent like soap or thinner if any oily substance still remains
The washer should be placed in an interval of 15cm~20cm depending on the width of cracks.
Usually 20cm is the most appropriate distance between the washers. You should put 5~6 washers for the repairing of cracks of one meter length.
You should seal cracks with epoxy sealing material, 1mm thick and 30mm wide, except for areas where to put the washer to prevent the injected epoxy from leaking, If sealing is not properly done on cracks, loss of epoxy resin can occur due to the damage of sealing when injection device is installed. Therefore, you should pay special attention while you work.
You should set the washer with epoxy sealing material on the places make in advance.
Stop the work until the sealing material is completely hardened. (It takes about 24 hours at the normal temperature of 25℃)
Fill the syringe injector with 30cc of epoxy grouting material and connect rubber bands with the washers. Place all the syringe injectors on the washers in the same way. when the grouting material of a syringe injector is consumed before tack free, you have to replace the syringe injector promptly with a syringe injector newly charge and continue injection.
After confirming that the grouting material is hardened, remove the syringe injector and washer and grind the surface cleanly with a hand grinder and finish, if necessary, with crack cover material or paint, (You can do the finishing work after about one day in summer, and about two days in winter, which is required for initial hardening)