The repaired surface should be cured by using either water or a curing compound.Смотреть что такое "epoxy resin" в других словарях:Įpoxy resin - noun a thermosetting resin used chiefly in strong adhesives and coatings and laminates (10 mm) thick.Įach layer should properly be compacted by a blunt stick or hammer, and the old layer should be scratched to facilitate bonding with the next layer. This mortar should be placed in layers about 3/8 in. The mortar should be prepared 30 min after mixing water to minimize chances of shrinkage and then should be remixed before use. The slot opening should be such that so that the base width is slightly greater than the surface width. The dry pack method is not suitable for filling or repairing active cracks.īefore applying grout by dry pack method the slot of 25mm x 25mm must open to a concrete surface. The dry pack method can use for the small– sized crack of inactive nature.
In Dry packing method, the hand placement of a low water content mortar is done by tamping or ramming the mortar into place to make intimate contact between the mortar and the existing concrete.Īs we use the low water-cement ratio for grout mix, there are chances of little shrinkage, and the patch remains tight and can have good quality concerning durability, strength, and water tightness. The good pressure should be maintained for several minutes after the group is filled over a surface to ensure good penetration.
Other admixtures or water reducers may be used to improve the properties of the grout.įor this treatment a manual injection gun may be used in case of small volume crack filling and for larger volumes, a pump should be used. However, the water to cement ratio should be kept as low as practical to minimize shrinkage and maximize strength.
In this method, mixtures of grout may contain cement and water or cement plus sand and water, depending on the width of the crack.