Waterproofing construction method for floor renovation of rooms with water without rigid leveling layer and protective layer

Abstract

This invention discloses a waterproof construction method for renovating the floor of a room with water without a rigid leveling layer and protective layer, comprising the following steps: S1: Cleaning the floor base to make it a flat, rough surface, and repairing any cracks in the base; S2: After repairing the cracks, grinding the repaired area to a smooth finish, wetting the base surface, and applying a cement-based penetrating crystalline waterproof coating; S3: After the cement-based penetrating crystalline waterproof coating is applied, applying an acrylic waterproof coating to the surface to form a protective layer. This application eliminates the need for a leveling layer and a protective layer, increasing the floor height by 6-8 cm or more, ensuring functionality and comfort; and ensuring that the final floor of bathrooms and other rooms without structural drop slabs is no higher than the floors of adjacent corridors or other rooms, reducing the risk of sewage overflowing into other functional areas.

Description

Technical Field

[0001] This invention relates to the technical field of renovation projects, and in particular to a waterproof construction method for renovating the floor of a room with water without the need for a rigid leveling layer and protective layer. Background Technology

[0002] As my country's urbanization and infrastructure construction come to an end, the dominance of new construction projects will fade from the historical stage of building construction, and renovation projects are becoming the mainstay of the construction industry. However, renovation projects are often accompanied by problems such as low bathroom ceiling height and lack of drop slabs, which seriously affect the building's functionality and comfort. Furthermore, the Ministry of Housing and Urban-Rural Development has clearly stipulated that the ceiling height of improved housing should not be less than 3 meters. In particular, the space occupied by reinforcement and pipelines further reduces the net floor height, making the problem even more serious. The low ceiling height and water overflow in bathrooms and other water-containing rooms in renovation projects have become common engineering problems that urgently need to be solved and cannot be avoided.

[0003] The conventional waterproofing construction method for bathroom renovation is to construct a concrete waterproofing leveling layer, a waterproofing layer, and a concrete waterproofing protective layer in sequence before proceeding to the next construction step. The average total thickness of the concrete waterproofing leveling layer and protective layer is 6-8cm, and there is a risk of sewage overflow. The concrete of the leveling layer and protective layer greatly increases the load borne by the beam and slab structure, leading to further strengthening of engineering reinforcement measures and requirements, and reinforcement measures occupy more space. Summary of the Invention

[0004] This invention provides a waterproof construction method for renovating the floor of a room with water without the need for a rigid leveling layer and protective layer. It is simple to operate, safe, has a short cycle, saves labor, and has good economic and social benefits.

[0005] The technical problem to be solved is: In the renovation of old projects, the waterproofing construction of rooms with small effective floor height (seriously affecting the use and comfort) and no slab drop (posing a risk of water accumulation and overflow) is difficult. In traditional renovation projects, the concrete of the leveling layer and protective layer greatly increases the load on the beam and slab structure, which leads to the need for further strengthening of the project reinforcement measures and requirements.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] This invention provides a waterproofing construction method for renovating wet room floors without the need for a rigid leveling layer and protective layer, comprising the following steps:

[0008] S1: Clean the ground base layer to make it a flat, rough surface, and repair any cracks in the base layer;

[0009] S2: After the crack is repaired, the repaired area is ground smooth, the base surface is moistened, and a cement-based penetrating crystalline waterproof coating is applied to the base surface.

[0010] S3: After the cement-based penetrating crystalline waterproof coating is applied, an acrylic waterproof coating is applied to its surface to form a protective layer;

[0011] S4: Finishing layer construction.

[0012] This invention provides a waterproofing construction method for renovating water-bearing room floors without rigid leveling layers and protective layers. Furthermore, a polymer cement-based waterproofing coating is provided between the cement-based penetrating crystalline waterproofing coating and the acrylic waterproofing coating.

[0013] This invention provides a waterproof construction method for renovating a water-filled room floor without a rigid leveling layer and protective layer. In S1, the base layer cleaning specifically involves removing the weak surfaces of the floor and vacuuming up any loose dust. Then, the base layer surface is shot-blasted and preliminarily smoothed with a grinder.

[0014] This invention provides a waterproof construction method for renovating water-bearing room floors without the need for a rigid leveling layer and protective layer. Further, in S1, crack repair includes:

[0015] 1) For minor cracks that do not affect structural safety, after chiseling, cleaning and washing, repair mortar should be used for repair;

[0016] 2) For areas with large hollow areas, grouting treatment should be performed;

[0017] 3) Reinforce areas with large cracks.

[0018] This invention provides a waterproof construction method for renovating water-filled room floors without rigid leveling layers and protective layers. Furthermore, for floors with hollow base layers but no bulging or bulging within 8mm, grouting treatment is adopted.

[0019] This invention provides a waterproof construction method for renovating water-bearing room floors without rigid leveling layers and protective layers. Furthermore, for floors with hollow areas exceeding 8mm beyond the original floor surface, a method of chiseling and filling with mortar is used for treatment.

[0020] This invention provides a waterproof construction method for renovating water-bearing room floors without rigid leveling layers and protective layers. Furthermore, for cracks smaller than 0.3mm, an interface agent is used to seal the cracks; for non-structural cracks larger than 0.3mm but less than 1mm, the cracks are cut into a V-shape and then filled with repair mortar; for structural cracks larger than 1mm, the cracks are cut into a V-shape, and a groove is cut perpendicular to the crack direction, with reinforcing bars placed in the groove, and then filled with repair mortar.

[0021] This invention provides a waterproof construction method for renovating the floor of a water-filled room without a rigid leveling layer and protective layer. Further, in S2, two coats of cement-based penetrating crystalline waterproof coating are applied, with a total thickness of not less than 1 mm. After the first coat of cement-based penetrating crystalline waterproof coating has fully set, a second coat of cement-based penetrating crystalline waterproof coating is applied, with the two coats applied perpendicularly.

[0022] This invention provides a waterproofing construction method for renovating wet room floors without rigid leveling layers and protective layers. Furthermore, after the first layer of cement-based penetrating crystalline waterproofing coating has fully set for 6-12 hours and is still damp, a second layer is applied.

[0023] This invention provides a waterproof construction method for renovating the floor of a water-bearing room without rigid leveling and protective layers. Furthermore, in step S3, a reinforcing material is added to weak points prone to leakage, such as floor drains, pipe roots, internal and external corners, and entrances, and then an acrylic waterproof coating is applied.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. This application creatively eliminates the concrete leveling layer and protective layer, thereby solving the waterproofing construction problems of rooms with low floor height (seriously affecting the use and comfort), many pipelines (occupying the net floor height), and no drop slab (posing a risk of water overflow) in engineering renovations;

[0026] 2. This application eliminates the need for concrete leveling and protective layers, increasing the floor height by 6-8cm or more to ensure functionality and comfort; it also ensures that the final floor of bathrooms and other rooms without structural drop slabs is no higher than the floor of adjacent corridors or other rooms, reducing the risk of sewage overflowing into other functional areas.

[0027] 3. Significantly reduces the load on the structure. Based on an average reduction of 0.07m in concrete thickness, the load reduction per square meter is 0.07m³ (concrete volume) × 2400kg (concrete density) = 168kg. Crack repair and the addition of cement-based penetrating crystalline waterproof coating make the original concrete structure more compact, improving the structural bearing capacity. After stress calculation, the reinforcement standard can be reduced or even eliminated, and the space occupied by reinforcement can be further increased to increase the net floor height.

[0028] 4. By repairing cracks and adding cement-based penetrating crystalline waterproof coating, the original concrete structure is made denser, which greatly improves the concrete's impermeability. This is equivalent to adding a layer of rigid waterproofing and a layer of flexible waterproofing. It improves the waterproofing standard, reduces the risk of leakage, and increases the original single layer of waterproofing to three layers.

[0029] 5. A layer of reinforcing material should be added to vulnerable areas prone to leakage, such as floor drains, pipe roots, internal and external corners, and entrances / exits, to improve the waterproof performance of these areas.

[0030] The invention will now be further described with reference to the accompanying drawings. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the present invention;

[0032] Figure 2 This is a schematic diagram of the crack repair method of the present invention;

[0033] Figure 3 This is a schematic diagram of the pipe root treatment according to the present invention;

[0034] Figure 4 This is a schematic diagram of the drain treatment method of the present invention.

[0035] Figure label:

[0036] 1. Base layer; 2. Cement-based penetrating crystalline waterproof coating; 3. Polymer cement-based waterproof coating; 4. Acrylic waterproof coating; 5. Finishing layer; 6. Cracks; 7. Reinforcing steel; 8. Groove; 9. Floor drain; 10. Pipe root; 11. Reinforcing material; 12. Dry hard cement mortar. Detailed Implementation

[0037] like Figures 1-4 As shown, this invention discloses a waterproofing construction method for renovating the floor of a room with water without a rigid leveling layer and protective layer, comprising the following steps:

[0038] S1: Clean the ground base of the waterproof construction area and use a vacuum cleaner to remove dust. Then, shot blast the base surface to separate the loose layer from the base. Finally, use a grinder to grind it smooth in order to repair concrete cracks.

[0039] Specifically, the base layer is treated with sandblasting or flatbed grinding machines. Professional floor sandblasting machines or grinding machines are used to remove weak surfaces on the ground, such as laitance and loose materials, to create a rough surface and a good bonding surface. At the same time, since the sandblasting machine has a built-in high-power dust collector, dust can be effectively avoided during construction.

[0040] Use a flat grinder to grind the edges and corners of concrete columns and walls; for oil-stained floors, use a special spray gun to treat areas that still have stains after sandblasting. After sandblasting, the floor should be free of loose slurry, sealed, and free of loose material and debris. After vacuuming, check the floor for cracks and hollow areas again. Mill any hollow or soft areas.

[0041] The loose soil generated after the base layer is ground must be vacuumed up. Use a high-powered vacuum cleaner to clean the ground. The ground must not have any impurities or dust that may affect the adhesion.

[0042] S2: After chiseling, cleaning and washing minor structural cracks that do not affect structural safety, repair them with high-strength and durable crack repair mortar specifically for terrazzo. If the hollow area is too large, grouting is required. If the crack is too large, reinforcement is required.

[0043] For surfaces with hollow base layers that are not bulging or have bulging within 8mm, grouting is recommended.

[0044] 1) Use tapping to pinpoint the hollow areas;

[0045] 2) Use an impact drill to drill through the hollow concrete layer, with the holes spaced 30-40cm apart. Then use a vacuum cleaner to remove the dust from the drilled holes, and then push the corresponding grouting valve into the hole.

[0046] 3) Mix the repair mortar interface agent evenly according to the ratio, pour it into the grouting pump, and then connect the grouting valve. Start grouting from one side to the other, tapping the ground while grouting. After the repair mortar interface agent is filled, switch to another grouting valve and repeat the above actions. When the repair mortar interface agent seeps out of the nearby cracks or there is no hollow area when tapping the original hollow area, stop the grouting work in this area. After the repair mortar interface agent dries, inject the repair mortar again using the same method.

[0047] 4) After grouting for 24 hours, knock off the grouting valve that is exposed above the ground with a hammer, and then proceed to the next step.

[0048] For surfaces with hollow areas exceeding 8mm above the original ground level, the method of removal and filling is used:

[0049] 1) Identify the hollow areas. Use a colored pen to clearly mark the boundaries of the identified hollow areas. When marking the boundaries, pay attention to accuracy and you can appropriately expand the boundary by 1cm to avoid omissions.

[0050] 2) Removal: Use a cutting saw to cut along the marked boundaries. Pay attention to cleaning and protecting yourself from dust while cutting. After cutting, use an electric hammer to remove the material from the outside of the boundary inwards. Be especially careful at the boundary, and do not disturb the non-hollow areas. Keep the original reinforcing steel bars intact.

[0051] 3) Filling and repairing: Clean the cleaned area with a vacuum cleaner, then apply the repair mortar interface agent. Use a soft brush to apply the repair mortar interface agent to the repaired base surface, and apply it evenly to avoid liquid accumulation. Apply two coats. Dilute the first coat with water at a volume ratio of 1:5, and the second coat with water at a volume ratio of 1:3. The drying time is 6-8 hours.

[0052] Mix the repair mortar with a mixer. After mixing evenly, add 7-8 times the weight of crushed stones with a diameter of 1-2cm, mix evenly, and then pour it into the treated pit area. Use a tool to tamp it down to make it firm until it is level with the original ground. After it dries, you can proceed to the next step.

[0053] For cracks in the base layer smaller than 0.3mm, after grinding the ground and carefully inspecting the ground, thoroughly clean the cracks with a vacuum cleaner. No additional work is required, as the interface agent used in the self-leveling mortar can seal the cracks.

[0054] For non-structural cracks in the base layer that are larger than 0.3mm but less than 1mm, which are generally considered to be crazing cracks, the treatment method is as follows:

[0055] 1) Use an angle grinder to cut the crack into a "V" shape, then use a vacuum cleaner to remove the dust;

[0056] 2) Apply the prepared interface agent to the cracks, twice;

[0057] 3) After the interface agent dries, prepare the repair mortar as required and pour it into the crack. After it dries, the next construction step can be carried out.

[0058] For structural cracks in the base layer larger than 1mm:

[0059] 1) First, use an angle grinder to cut the crack into a "V" shape, then use a vacuum cleaner to remove the dust.

[0060] 2) Use an angle grinder to cut a 10-12mm groove perpendicular to the crack, then chisel and trim it. Cut grooves 30-40cm apart along the crack direction, with a depth 2-3cm lower than the repaired surface. Then use a vacuum cleaner to clean the dust inside the hole.

[0061] 3) Cut grade III steel bars with a diameter of 10mm and a length of about 12-15cm, place them into the groove one by one, and then pour in the mixed self-leveling compound until the groove containing the steel bars is full;

[0062] 4) Fill the cut cracks using the method described above.

[0063] S3: After crack repair, the mortar at the repaired area should be slightly higher than the base surface. After grinding the entire repaired area to a smooth finish, the waterproof base layer can be made smooth. If the smoothness is too poor, self-leveling mortar should be used to level the surface after crack repair.

[0064] Self-leveling mortar should be laid in layers on the base layer to reach the specified thickness, with each layer not exceeding 3mm. During construction, newly poured self-leveling mortar should be poured on top of the freshly poured self-leveling mortar as soon as possible to allow for rapid integration.

[0065] S4: After the base layer reaches the construction conditions, round off the internal and external corners and strengthen the parts such as pipe roots. Moisten the surface of the base layer and apply the cementitious capillary crystalline waterproof coating twice with a total thickness less than 1 mm. After the first application of the cementitious capillary crystalline waterproof coating has finally set, the second application can be carried out. The application directions of the two coatings are perpendicular. The main function of this process is to add an additional waterproof layer and ensure good bonding between the cementitious capillary crystalline waterproof coating and the concrete. After penetrating into the concrete, it is equivalent to filling the natural voids in the concrete, forming a rigid concrete self-waterproofing, making the original concrete structure more dense, with better structural mechanical properties and higher bearing capacity.

[0066] Specifically, when applying the cementitious capillary crystalline waterproof coating, use a semi-hard nylon brush instead of a trowel, roller, paintbrush, etc. Apply with force back and forth during application to ensure that all concave and convex parts are coated. The coating is required to be uniform, neither too thin nor too thick, and controlled within the unit dosage.

[0067] This is carried out 6 - 12 h after the first coating has finally set and is still in a wet state. If the first coating is too dry, mist water should be sprayed first before applying the synergist. The same amount of concentrate as the previous coating can be used for this coating. After the coating construction, check whether the coating is uniform, whether the dosage is accurate, and whether there is any missed coating. If there are defects, they should be repaired in a timely manner.

[0068] The curing must use clean water. Spray curing is carried out after the coating has finally set, and there should be no standing water. Generally, spray water 3 times a day for several consecutive days. In hot or dry weather, spray multiple times to keep it in a wet state and prevent the coating from drying prematurely.

[0069] S5: Apply a 1.5 - mm - thick polymer cement - based waterproof coating on the cementitious capillary crystalline waterproof coating. Determine whether to carry out this process according to the room function, waterproof protection level, funds, and the requirements of the construction unit

[0070] After the construction of the polymer cement - based waterproof coating is completed, apply a layer of acrylic waterproof coating on the surface with a thickness of 2.0 mm. Since the acrylic waterproof coating has good elasticity and is not easily damaged, it can act as a protective layer while ensuring the waterproof function, eliminating the process of the concrete protective layer. The acrylic waterproof coating is applied in layers. After the last waterproof coating has dried for 48 h, the first water test is carried out. If there is no threshold or the indoor and outdoor elevations are the same, first use cement mortar or clay to plaster a water - retaining strip at the door, generally with a height of about 50 mm, and then store water with a depth of 20 - 30 mm for 24 h. No leakage is considered qualified.

[0071] S7: Finally, carry out the construction of the finish layer on the acrylic waterproof coating.

[0072] For vulnerable areas prone to leakage, such as floor drains, pipe roots, internal and external corners, and entrances / exits, an additional layer of reinforcing material should be added. This reinforcing material should be non-woven fabric, with a width of at least 200mm and an overlap of at least 100mm. During construction, first apply a layer of waterproof coating, then lay the reinforcing material, and finally apply another layer of waterproof coating. The additional layer at pipe roots and sleeves should be brushed firmly to adhere to the pipe roots, and a 20mm x 20mm groove should be left around the pipe roots, filled with a dry, hardened cement mortar with a cement-to-sand ratio of 1:3 to prevent cracking of the pipe roots.

[0073] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A waterproofing construction method for renovating the floor of a room with water without the need for a rigid leveling layer and protective layer, characterized in that... Includes the following steps: S1: Clean the ground base layer to make it a flat, rough surface, and repair any cracks in the base layer; S2: After the crack is repaired, the repaired area is ground smooth, the base surface is moistened, and cement-based penetrating crystalline waterproof coating is applied to the base surface. The cement-based penetrating crystalline waterproof coating is applied in two coats with a total thickness of not less than 1mm. After the first coat of cement-based penetrating crystalline waterproof coating has set, the second coat of cement-based penetrating crystalline waterproof coating is applied. The two coats are applied in perpendicular directions. For weak points such as floor drains and pipe roots that are prone to leakage, leave a 20mm×20mm groove around the pipe root and fill it with dry hard cement mortar with a cement-to-sand weight ratio of 1:3; then apply a layer of cement-based penetrating crystalline waterproof coating to the pipe root, then lay a reinforcing material, which is non-woven fabric, and finally apply another layer of cement-based penetrating crystalline waterproof coating. S3: After the cement-based penetrating crystalline waterproof coating is applied, apply a layer of acrylic waterproof coating on its surface. The acrylic waterproof coating is 2.0mm thick to form a protective layer. S4: Finishing layer construction.

2. The waterproofing construction method for renovating a wet room floor without a rigid leveling layer and protective layer as described in claim 1, characterized in that, A polymer-based cementitious waterproof coating is placed between the cement-based penetrating crystalline waterproof coating and the acrylic waterproof coating.

3. The waterproofing construction method for renovating a wet room floor without a rigid leveling layer and protective layer as described in claim 1, characterized in that, In S1, the specific steps of cleaning the base layer involve removing the weak surfaces of the ground, vacuuming up any loose dust, shot blasting the base layer surface, and then using a grinder to initially smooth it.

4. The waterproofing construction method for renovating a wet room floor without a rigid leveling layer and protective layer as described in claim 1, characterized in that, In S1, crack repair includes: 1) For minor cracks that do not affect structural safety, after chiseling, cleaning and washing, repair mortar should be used for repair; 2) For areas with large hollow areas, grouting treatment should be performed; 3) Reinforce areas with large cracks.

5. The waterproofing construction method for renovating a wet room floor without a rigid leveling layer and protective layer as described in claim 4, characterized in that, For ground surfaces with hollow base layers but no bulging or bulging within 8mm, grouting treatment is adopted.

6. The waterproofing construction method for renovating a wet room floor without a rigid leveling layer and protective layer according to claim 4, characterized in that, For surfaces with hollow areas exceeding 8mm above the original ground level, the method of chiseling and filling with mortar should be used for treatment.

7. The waterproofing construction method for renovating a wet room floor without a rigid leveling layer and protective layer according to claim 4, characterized in that, For cracks smaller than 0.3 mm, use an interface agent to seal the cracks; for non-structural cracks larger than 0.3 mm but less than 1 mm, cut the cracks into a V-shape and then fill them with repair mortar; for structural cracks larger than 1 mm, cut the cracks into a V-shape, cut a groove perpendicular to the crack direction, place reinforcing bars in the groove, and then fill it with repair mortar.

8. The waterproofing construction method for renovating a wet room floor without a rigid leveling layer and protective layer according to claim 1, characterized in that, Apply the second coat 6-12 hours after the first coat of cement-based penetrating crystalline waterproof coating has fully set and is still damp.

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