Ground waterproof material
Waterproof roll
Waterproof coiled materials in ground waterproof materials are mainly used in engineering buildings, roofs, external walls and so on. Its waterproof object is concrete members, and the scheme is chosen to solve the problem according to the characteristics of concrete. In order to achieve the best waterproof effect, the waterproof material on the ground should be combined with rigidity and flexibility.
9 1 1 polyurethane waterproof material
It is a kind of solidified synthetic polymer waterproof coating, which is evenly divided into half by Party A and Party B in proportion, and then painted on the base surface to be constructed. After a few hours, it will react and solidify into a waterproof coating with elasticity, toughness and durability.
New polymer cement-based waterproof material
Ground waterproof materials can be divided into universal type and flexible type. General new polymer cement-based waterproof material is a two-component waterproof material consisting of liquid material composed of acrylic emulsion and additives and powder material composed of special cement, graded sand and special mineral powder in a specific proportion. The chemical reaction produced by the mixing of the two materials can be coated on the surface layer to be waterproof, and can also penetrate into the crystals formed inside the substrate.
The flexible ground waterproof material is characterized by mixing powder and liquid materials to form a tough and highly elastic waterproof film, which has good adhesion to concrete and cement mortar and is firmly combined with the base surface to achieve waterproof effect.
Ground waterproofing practice
Waterproof construction technology of wall and ground: base treatment of wall and ground → brushing cement slurry → plastering bottom mortar → brushing cement slurry → plastering mortar → brushing cement mortar → curing.
1, primary treatment
(1) If there is honeycomb or loose concrete on the concrete wall, it should be removed, washed with water, then leveled with 1: 3 cement mortar or compacted with 1: 2 hard cement mortar. The surface oil stain should be scrubbed with 10% caustic soda solution, and the concrete surface should be roughened.
(2) When plastering the waterproof layer of brick wall, it is necessary to make a seam when bricklaying, and the depth is 10 ~ 12mm. The embedded pipe through the wall is exposed at the grass-roots level, and the periphery is carved into a groove with a width of 20 ~ 30 mm and a depth of 50 ~ 60 mm, and compacted with 1: 2 hardened cement mortar. Waterproof treatment should be done according to the design requirements when the pipeline passes through the wall, and the hidden inspection procedures should be handled.
2, concrete wall plastering cement mortar waterproof layer
(1) Brush cement slurry: the mixing ratio is cement: water: waterproof oil = 1: 0.8: 0.025 (weight ratio). First, cement and water are mixed, then waterproof oil is added and stirred evenly, then evenly brushed on the surface of the base with a soft brush, and then waterproof mortar is coated on the bottom.
(2) Cement mortar with a ratio of 1: 2.5 is used as the bottom mortar, and waterproof powder with a water-cement ratio of 0.6-0.65 and a consistency of 7-8 cm is added. Mix waterproof powder with cement and sand, then add water and stir. After mixing evenly, plastering operation should be carried out. The plastering thickness of bottom ash is 5 ~ 10 mm, and it shall be brushed with a broom before the ash powder solidifies. Mortar should be mixed with it. Mixing and mortar use time shall not exceed 60 minutes, and overnight mortar is strictly prohibited.
(3) Brush the cement slurry: After the bottom ash is plastered, brush the cement slurry 1d at room temperature, and the mixture ratio and method are the same as those of the first layer.
(4) Mortar for topping: After brushing plain cement slurry, the topping shall be followed, the mixture ratio is the same as that of the underlying mortar, and the plastering thickness is about 5 ~10 mm. Before solidification, it shall be leveled with a wood trowel and calendered with an iron trowel.
(5) Brush the cement slurry: brush the cement slurry 1d after plastering the surface layer, and the mixing ratio is cement: water: waterproof oil = 1: 1: 0.03 (weight ratio), which is the same as that of the first layer.
3, brick wall plastering cement mortar waterproof layer
(1) Watering and wetting at the grass-roots level: water the brick wall thoroughly with water pipes the day before plastering, and then water and wet the brick wall the next day when plastering.
(2) Priming mortar: cement: sand = 1: 2.5, waterproof powder with 3% cement. Scrape a thin layer with an iron trowel first, then dust it with a wooden trowel. If it is flat, compact the surface to make it smooth. Plastering thickness is about 6 ~10 mm.
(3) Plastering with cement slurry: After the bottom coat is plastered 1 ~ 2 days, the surface is watered and wetted, then the cement waterproof slurry is plastered, and waterproof powder accounting for 3% of the cement weight is added. First, mix the cement and waterproof powder, then add a proper amount of water and stir evenly, and apply a thin layer with an iron trowel with a thickness of about1mm.
(4) Plastering mortar: After plastering the cement slurry, plastering mortar is applied, and the mixture ratio is the same as that of the bottom layer. Use a wooden trowel to smooth first, and then use an iron trowel to compact and polish. Plastering thickness is between 6 and 8 mm.
(5) Brush the cement slurry: after the surface layer is plastered 1d, brush the cement slurry, and the mixing ratio is cement: water: waterproof oil =1:kloc-0/:0.03 (weight ratio). The method is to mix cement and water evenly, then add waterproof oil and mix evenly, and brush the surface layer evenly with a soft brush.
4, the ground plastering cement mortar waterproof layer
(1) Cleaning base: cleaning loose concrete, mortar, etc. On the cushion layer, and remove the protruding bumps.
(2) Brush the cement slurry: the mixing ratio of cement and waterproof oil is 1: 0.03 (weight ratio), add a proper amount of water to make porridge, spread it on the ground, and sweep it evenly with a broom.
(3) Priming mortar: 1: 3 cement mortar is used as the bottom layer, and waterproof powder accounting for 3% ~ 5% of the cement weight is added. The mixed mortar shall be leveled with a ruler, leveled with a wood trowel and leveled with an iron trowel.
(4) Brush the cement slurry: brush the cement slurry once after the normal temperature interval 1d, and add a proper amount of water in the mixture ratio of cement: waterproof oil = 1: 0.03 (weight ratio).
(5) Topcoat mortar: After brushing the cement slurry, the topcoat mortar is used for training at the bottom.
(6) Brush plain cement slurry: brush plain cement slurry for the last time after the initial setting of the surface mortar (not too thin to meet the wear resistance requirements), and the mixing ratio is cement: waterproof oil = 1: 0.0 1 (weight ratio). Add a proper amount of water to make it closely combine with the surface mortar, and then press it with light.
(7) Maintenance: After the ground has a certain strength, the surface shall be covered with sacks or straw bags and watered frequently. Maintenance time depends on air temperature conditions, usually 7 days. Slag Portland cement shall not be less than 14d, and shall not bear hydrostatic pressure during this period. The ambient temperature for winter maintenance should not be lower than +5℃.
5, plastering process, if and Angle of Yin and Yang.
Plastering procedure, generally wipe the vertical wall first and then wipe the ground. There should be no mortar at the corner of Yin and Yang, and the mortar of each layer of plastering should not stay in a line. If the bottom layer and the surface layer tower are between 15 ~ 20 cm, cement waterproof slurry should be brushed first. All internal corners of the wall should be rounded with a radius of 50mm, external corners should be rounded with a radius of 10 mm, and all internal corners of the ground should be rounded with a radius of 50mm? The above fillet shall be calendered and compacted with trowel.
The total thickness of the five-layer method should be controlled at about 20 mm, and the multi-layer method should be continuously constructed, and the layers should be closely combined without leaving construction joints. If you have to leave, the ladder should be kept. If they are connected, they should be operated in hierarchical order, and the layers should overlap closely. If connected, it must be 200mm away from the internal angle.
The knowledge and practice of ground waterproof materials are introduced here for everyone. What material should be chosen for floor waterproofing depends on the type and location of the floor, such as whether the floor decoration is indoor or outdoor. Specific analysis of specific problems will have a better effect. As for the ground waterproofing practice, it is enough for the owner to know about it, and there is no need to care too much, because how to do it needs to be handed over to professional decoration masters and teams, so that they can help you with the ground waterproofing project.
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