With the increase in the age of residential buildings, many old homes have been slowly aging, and there have been a few water leakage phenomena on the outer walls. Waterproof leakage encountered how to do? Few people will understand these little knowledge. Below, Xiao Bian will give you a detailed list of protective measures and learn it quickly.
First, ensure the construction quality of the screed
1, the leveling layer before the plaster work:
Attention should be paid to the wetness of the surface of the masonry batch ash, and the water spray is sufficient. The outer wall surface of the joint between the masonry part and the concrete part shall be covered with 200 宽 wide 16# steel wire mesh and fixed to resist different conditions. Cracking due to different expansion coefficients of waterproof plugging materials. For laitance and residual template wood chips on the concrete wall, the exposed steel bars and iron wires must be cleaned to ensure that the plastering mortar adheres firmly to the grass roots.
2, when the leveling layer plastering should pay attention to: (1) mortar should be strictly in accordance with the ratio, strict measurement, control of water-cement ratio, is strictly prohibited during the construction process mixed with water; (2) plastering mortar should be layered plaster, especially high-rise buildings, Local thick plastering, which requires layered batch ash, the thickness of each layer of plaster should not exceed 2?, such as the thickness is too large, should be located in the stratified wire mesh; (3) approved mortar waterproof polymer Mortar; (4) The external plastering scaffolding pulls the ribs and so on. After the cutting, the bell mouth is wiped and flattened. After the slurry is fixed, the iron trowel can be used to cut it into a mortar, and then a brush of plain grout can be brushed.
Second, wall inspection and processing
1. Wall hole inspection and treatment: Before the batch of ash, it is necessary to inspect the holes of the wall to block various holes such as the wall body. The uneven part is leveled with 1:3 cement mortar. If it is thick, it should be leveled and leveled. Or hang grey mesh, bonding cloth and other batches of ash, the other on the external walls of scaffolding, tower cranes, construction lifts, etc. left the hole should be clean and clean, with a slurry of cement slurry, and then use the dry hard halves 2 Sub-half block, first inside and outside, fully tamping and compacting, the downfall of the downspout clamp is inclined 3° to 5° downwards, and the clip sleeve is inflated with the epoxy resin brush embedded in the clamp, and the wooden wedge is strictly prohibited. Waterproof plugging concrete screw wall screw hole should be drilled around the hole, filled with swelling cement mortar, and then sealed with polymer waterproof mortar, sealing tightly.
2. A small amount of moulds and cellular pockmarks appear on the outer wall of the external wall to repair the concrete. According to the actual situation, the following methods are used to repair the surface of the crucible:
1 Modular repair, first cut out the protruding part of the inconsistent design and specification requirements, and clean it up, followed by brushing the base with a wire brush or pressurized water, and then leveling with a 1:2 or 1:2.5 cement mortar, and finally sprinkling Conservation for fourteen days.
(2) Honeycomb repair (All cells found to have a small area with no holes on the surface), first remove the loose stones and swarf on the surface of the surface and clean them. Secondly, before the repair, the water on the surface of the concrete surface to be repaired should be washed with water, and the surface of the repair surface should be kept moist. Then, the water mortar should be leveled with 1:2 or 1:2.5, and then sprinkled for 14 days.
3. Requirements for exterior wall masonry: avoid wall joints and light penetration during masonry, mortar and mortar joints should be uniform, wall joints with columns and columns, clean waste slurry should be cleaned, brickwork should be wetted, masonry walls Can not be reached once, it should be divided into two to three bricks finished to prevent mortar shrinkage, so that the wall is fully solid, and pay attention to the wall flatness detection, to prevent leakage of water under the next batch of process ash too thick or too thin.