External wall seepage is a common quality problem. The seepage of the external wall is mainly manifested in the seepage of the wall surface, the seepage of water around the external wall window, and the infiltration of water at the reserved hole. The following small series introduces everyone to the external wall seepage for several reasons. 1. In the joints between the bottom of frame columns and frame beams and masonry joints, the connection reinforcements are not laid according to the specification or design regulations, or the length and number of the embedded reinforcements are not enough, or the filling between frame beams, columns and wall masonry is not Density, these parts are the multiple sites of wall water seepage. Before the plastering, no serious cleaning of the wall base was carried out, leaving many voids on the masonry to form a passage for rainwater infiltration; 2. Some construction companies think in one-sidedly that: facing bricks have good waterproof performance, thus neglecting the requirements for plastering quality of the bottom and middle layers; some are more arbitrarily thinning the plaster thickness; some plaster thicknesses are not in accordance with the specifications “cement mortar The thickness of the secondary plastering should not be more than 5-7 mm, which requires stratified construction. Instead, plastering is used to make the plaster layer cracked, opening up a path for rain leakage. 3, the quality of the brick is not qualified. Many sites did not carry out sampling inspections on the scene bricks. The water absorption rate of the tile and the resistance to quenching and hot heat do not conform to the quality requirements. There are also many times that the waste bricks are used in the project. Due to the impact of the sun and rain, cracks or glazed shedding will occur soon after the completion of the hand-washing; Corners and damaged tiles are not selected. 4. Because of the difference of the coefficient of linear thermal expansion coefficient between the exterior wall brick and the brickwork, under the same temperature condition, the deformation values ​​of the facing brick and the brickwork body are different, which affects their mutual adhesion ability. In many projects, bricks were not strictly constructed in accordance with the operating procedures, and the grass-roots level and the bricks were not soaked and moistened. The mix ratio of the paste materials did not meet the design requirements; at the same time, the surface roughness of the tiles was only maintained when the paste was used. The bricks were beaten, but the mortar was not filled with the back of the entire brick. The mortar was often distributed only in the middle of the bricks. There was no mortar around the bricks, and it was more susceptible to different linear expansion coefficients of temperature, cracks and cavities, and rain leakage. aisle. In addition, the water impermeability of the sintered material of the tile, once the rain is impinged on by the wind and immersed in the crack, the accumulated water in the cavity cannot be discharged, and only the room is immersed. 5, tile mosaic paste is not right. In the case of veneer tiles, at the top of the parapets, sill lines, drainage outlets, etc., the principle of vertical face bricks are not affixed in accordance with the principle of flat face bricks, or dripping lines are not affixed so that rainwater can penetrate into the wall along vertical seams; Some exterior wall decoration projects often do not have window lines, dripping lines, and sill lines for the smoothness of the external walls of the facing bricks, or do only slightly higher eagle sockets at the lower windows. When it rains, due to wind force and the surface tension of the water, it is easy to make the rain go through the eagles along the window, or seep into the room along the wall under the sill. In addition, cracks caused by non-uniform foundation sinking and temperature deformation in the upper part of the top floor will also cause water seepage on the external walls. Xiao Bian concludes: The above introduced the main reason for the seepage of the outdoor wall surface for several reasons. I hope to help everyone. For more relevant knowledge, please continue to pay attention to this website information platform. Follow-up will bring more exciting content for everyone. Chain G80,G80 Lifting Chain,G80 Chain Guangdong Gongyou Lift Slings Machinery CO.,LTD , https://www.wmpallettruck.com
There are several reasons why there are water seepage on the outdoor wall? 