Maintenance method for water leakage of basement roof

Abstract

The invention provides a maintenance method for water leakage of a basement roof, which comprises the following steps: cleaning a roof area, and determining a leakage area; a V-shaped groove is dug; preparing waterproof mortar; the anti-blocking rope is subjected to roughening treatment; immersing an anti-blocking rope; preliminary plugging; waterproof mortar is smeared; screeding and compacting are conducted; maintenance operation on the backwater side of the basement roof is achieved through nine working procedures of film covering and curing, based on the fact that a mortar waterproof agent is added into mortar, internal silicate reacts with a hydration product of cement to generate gel containing silicic acid groups, the gel serves as an aggregate component, in the growth process, pores in concrete can be filled and stuffed, and the service life of the concrete is prolonged. Therefore, the communication of capillary channels is cut off, the porosity in the concrete is reduced, and the compactness and the impermeability are improved; on the basis of combination of the anti-blocking rope and the mortar in the technology, water pressure blocking is achieved, the maintenance time is short, and the speed of solving the leakage problem is high; the maintenance is labor-saving, time-saving and material-saving; and the cost is low.

Description

Technical Field

[0001] The invention generally relates to the field of building waterproofing, and in particular to a method for repairing water leakage from a basement roof. Background Art

[0002] At present in my country, leakage has become the second largest problem affecting building quality besides building structure. It has always been a major problem that plagues the construction industry and families. The average leakage rate of houses across the country has basically remained at around 65%, and the leakage rate of underground buildings has exceeded 80%.

[0003] As the scale of construction projects in various places expands, the demand for underground space is also increasing. However, due to the special environment of the basement, there are strict requirements for its waterproofing, anti-seepage, and anti-cracking. Water seepage in the basement exterior wall often occurs. Leakage is a common problem in buildings and an important issue that affects the use function of buildings. Once the basement leaks, it will cause high maintenance costs and great difficulty in maintenance. Summary of the invention

[0004] According to the present invention, in view of the problems existing in the prior art, a method for repairing water leakage in a basement roof is provided, comprising the following steps:

[0005] Clean the top slab area, identify the leakage area, and clean the basement top slab surface until the top slab concrete structure is exposed;

[0006] Dig a V-shaped groove along the leakage cracks in the roof and dig a groove with a V-shaped cross section;

[0007] A waterproof mortar is prepared, wherein the mortar comprises cement, sand and water, wherein the mass ratio of cement to sand is 1:2-3, and the mass ratio of cement to water is 1:0.4-0.6, wherein a mortar waterproofing agent is added to the water, and the mass ratio of the mortar waterproofing agent to water is prepared at a ratio of 1:200, and the mortar waterproofing agent comprises 6-20% sodium dodecylbenzene sulfonate; 1.2-18% oleoyl polypeptide complex; 5-15% silicate; 20-40% calcium hydroxide; and 7-67.8% water;

[0008] Immerse the anti-blocking rope, select a hemp rope with a diameter of 8-10mm as the anti-blocking rope, and immerse it in the prepared waterproof mortar so that its surface is evenly coated with waterproof mortar;

[0009] Initial blocking: press the anti-blocking rope immersed in waterproof mortar into the V-shaped groove along the groove of the V-shaped groove to fix it in the V-shaped groove;

[0010] Apply waterproof mortar, apply the prepared waterproof mortar to the excavated V-shaped groove, and seal the anti-blocking rope in the V-shaped groove;

[0011] Cover and maintain the film to complete the waterproof construction.

[0012] In some embodiments, the depth of the V-groove is 20-30 mm.

[0013] In some embodiments, the width of the V-shaped groove is at least 25 mm.

[0014] In some embodiments, before the anti-blocking rope is immersed in the waterproof mortar, a tool is used to scratch the surface of the anti-blocking rope, so that fibers that are interconnected with the anti-blocking rope body are supported on the surface of the anti-blocking rope.

[0015] In some embodiments, the cement used in the waterproof mortar is 32.5 silicate cement.

[0016] In some embodiments, after applying the waterproof mortar, it is necessary to perform smoothing and compaction operations, use tools to fully apply the waterproof mortar in the excavated V-groove, and compact it, and finally scrape off the waterproof mortar protruding from the concrete surface.

[0017] In some embodiments, the weight ratio of sodium dodecylbenzene sulfonate to oleoyl polypeptide complex=1:(0.2-0.9).

[0018] In some embodiments, the weight ratio of sodium dodecylbenzene sulfonate to oleoyl polypeptide complex = 1:(0.5-0.7).

[0019] In some embodiments, the oleoyl polypeptide complex is a combination of one or more of N-oleoyl polypeptide, sodium N-oleoyl polypeptide, and N-alkanoyl polypeptide.

[0020] By adding mortar waterproofing agent into the mortar, the silicate inside reacts with the hydration product of cement to generate a gel containing silicate. The gel, as an aggregate component, fills and plugs the pores in the concrete during its growth, thereby cutting off the connectivity of the capillary channels, reducing the porosity inside the concrete, and improving the density and impermeability. Under alkaline conditions, the alkali generated by cement hydration is neutralized inside the mortar by the oleoyl polypeptide complex and sodium dodecylbenzene sulfonate, maintaining the internal environment of the mortar for a long time and preventing the alkali return phenomenon inside the mortar. The oleoyl polypeptide complex and sodium dodecylbenzene sulfonate are used as surfactants to improve the internal fluidity of the mortar and reduce cracking and shrinkage. As an auxiliary surfactant, the oleoyl polypeptide complex also has the characteristics of foaming, dispersibility, suspension, adsorption, etc., which are used to improve the uniformity of the waterproofing agent, prevent the precipitation of the aggregate components of the internal reaction, and facilitate the stability of its performance. By adding waterproof mortar into the V-groove of the concrete, the contact between the internal reaction of the concrete and the outside air is blocked, the entry of carbon dioxide in the air is prevented, the life of the concrete is increased, and the anti-leakage property of the concrete is improved.

[0021] The anti-blocking rope is used for preliminary sealing. The fibers on the surrounding side can increase the contact area with the inner wall of the V-shaped groove. It carries waterproof mortar, which greatly improves the adhesion between the anti-blocking rope and the inner wall of the V-shaped groove, and helps to perform preliminary sealing of leaks, so that there is sufficient time to use waterproof mortar to plug the V-shaped groove later. Moreover, the combination of the sealing rope and the waterproof mortar improves the integrity of the waterproof mortar and reduces the impact of high water pressure on the sealing efficiency.

[0022] It should be understood that the contents described in the summary of the invention are not intended to limit the key or important features of the embodiments of the present disclosure, nor are they intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A flowchart of the overall steps of a method for repairing water leakage in a basement roof provided by an embodiment of the present invention is shown.

[0024] Explanation of symbols

[0025] 1. Clean the top plate area and identify the leakage area; 2. Dig a V-shaped groove; 3. Prepare waterproof mortar; 4. Roughen the anti-blocking rope; 5. Immerse the anti-blocking rope; 6. Preliminary sealing; 7. Apply waterproof mortar; 8. Smooth and compact; 9. Cover with film for maintenance. DETAILED DESCRIPTION

[0026] Hereinafter, preferred embodiments (or implementation modes) of the present invention will be described in detail with reference to the accompanying drawings.

[0027] The invention provides a repair method for water leakage of a basement roof. The method realizes the repair work on the backwater side of the basement roof through nine working steps, namely, cleaning the roof area to determine the leakage area; cutting a V-shaped groove; mixing waterproof mortar; roughening the anti-blocking rope; immersing the anti-blocking rope; preliminary blocking; applying waterproof mortar; leveling and compacting; and film covering and curing. The method adds a mortar waterproofing agent into the mortar, and the internal silicate reacts with the hydration product of cement to generate a gel containing a silicate group. The gel, as an aggregate component, fills and plugs the pores in the concrete during its growth, thereby cutting off the connection of the capillary channels, reducing the porosity inside the concrete, and improving the density and impermeability. In terms of technology, the combination of the anti-blocking rope and the mortar realizes the blocking of water pressure, and has the advantages of short repair time, fast solution to the leakage problem, labor-saving, time-saving, material-saving and low cost.

[0028] Figure 1 A method for repairing water leakage in a basement roof provided by an embodiment of the present invention is implemented, comprising the following steps:

[0029] S1: Clean the top plate area and identify the leakage area 1;

[0030] First of all, it is necessary to evaluate the leakage area of ​​the roof. Due to water leakage on the roof surface, the infiltration area will gradually expand. It is necessary to further determine the cleaning range of the roof according to the infiltration range or dripping area, and use tools such as shovels to remove the surface layer of the roof surface. The surface layer of the roof is generally coated with putty powder. Due to water leakage and infiltration in the roof area, the surface of the roof is moist, and there is no need to spray water. Scraping can be done directly, thereby improving the efficiency of surface detachment. However, during the cleaning operation, it is necessary to prevent circuit problems, water safety problems, or gas safety problems that may occur during the cleaning process. During the cleaning process, personnel need to wear protective equipment and properly handle waste to ensure that the cleaning work is carried out in an orderly manner until the concrete in the leakage area of ​​the roof area is exposed.

[0031] S2: excavating V-shaped groove 2;

[0032] First, we need to accurately locate the direction of the roof leakage cracks. Then, along these clear leakage paths, we use professional tools to chisel out V-shaped grooves on the concrete surface. The depth of the V-shaped groove is controlled at a distance of 20-30mm, and the width of the V-shaped groove is controlled at least 25mm. In this step, we pay special attention to the additional challenges that leakage cracks may bring, such as increased water seepage, changes in crack width, etc., to prevent large crack ranges or cause unnecessary damage.

[0033] The opening of the V-shaped groove not only facilitates the close embedding of the subsequent filling material, but also effectively disperses the stress at the crack and enhances the stability of the repair structure. The two side walls of the V-shaped groove are inclined. Compared with the straight groove, it can better fill the material structure and form a stronger bonding force. It also plays an extrusion and guiding role for the depth of the filling material, improving the density of the groove filling.

[0034] S3: prepare waterproof mortar 3;

[0035] The selected mortar is mainly composed of three basic components: cement, sand, and water. The mass ratio of cement to sand is between 1:2 and 1:3. This ratio helps the strength and stability of the mortar. At the same time, the ratio of cement to water is also crucial, and the mass ratio is between 1:0.4 and 1:0.6 to ensure that the mortar is neither too dry nor too diluted. In addition, silicate cement is selected with a strength grade of not less than 32.5Mpa, and medium sand is selected.

[0036] Among them, a mortar waterproofing agent is also added to the water, and the mass ratio of the mortar waterproofing agent to water is 1:200; the mortar waterproofing agent includes 6-20% sodium dodecylbenzene sulfonate; 1.2-18% oleoyl polypeptide complex; 5-15% silicate; 20-40% calcium hydroxide; and 7-67.8% water. Sodium dodecylbenzene sulfonate can effectively improve the waterproof barrier ability of the mortar; oleoyl polypeptide complex, which enhances the density and impermeability of the mortar, making it difficult for water to penetrate; silicate, as a reinforcing agent for the mortar, improves the overall strength and durability of the mortar; calcium hydroxide, which is not only an important component of the waterproofing agent, but also promotes the hardening process of the mortar; and although water seems simple, it occupies a proportion of 7% to 67.8% in the waterproofing agent and is an indispensable solvent in the preparation process.

[0037] S4: Anti-blocking rope roughening treatment 4;

[0038] The anti-blocking rope needs to be a rope with a diameter of 8-10mm. The material is a rope woven from silk threads, which can be hemp rope, wool rope, etc. Before using the anti-blocking rope, you need to use a tool with a scratching function such as a scraping comb to finely scratch the surface of the anti-blocking rope to form hairy fibers on the surface of the anti-blocking rope that are interconnected with the main body of the anti-blocking rope. This aims to physically enhance the adhesion between the anti-blocking rope and the waterproof mortar that it is about to contact. During the scratching process, the strength and direction must be carefully controlled to effectively remove tiny impurities and uneven parts on the surface of the anti-blocking rope while avoiding damage to its main structure.

[0039] S5: immerse the anti-blocking rope 5;

[0040] Slowly and carefully immerse the anti-blocking rope into the container containing waterproof mortar. During the invasion process, ensure that every tiny part of the anti-blocking rope can fully contact the waterproof mortar. This not only achieves full surface coverage, but also allows the mortar to penetrate into the fiber gaps of the rope to form a strong and tight waterproof layer.

[0041] During the soaking process, you can gently squeeze and move the anti-blocking rope with your hands or special tools to help the mortar adhere to the surface of the rope more evenly to avoid blank spaces or uneven thickness. After confirming that the surface of the anti-blocking rope has been completely and evenly coated with waterproof mortar and the mortar layer has reached a certain thickness and stability, carefully remove the anti-blocking rope from the mortar.

[0042] S6: preliminary closure 6;

[0043] During the initial sealing operation, the anti-blocking rope immersed in the waterproof mortar is first taken out, and the anti-blocking rope is pressed inside the V-shaped groove along the groove of the V-shaped groove. Since the anti-blocking rope has been roughened, the fibers on its surface are attached with waterproof mortar and attached to the inner wall of the V-shaped groove, which further improves the fixing and adsorption ability of the anti-blocking rope, thereby effectively resisting the local high water pressure area in the V-shaped groove.

[0044] In order to further optimize the blocking effect, we can also adopt the strategy of segmenting the anti-blocking rope. The length of the specific segment is not determined arbitrarily. It will be flexibly adjusted according to the actual length of the V-shaped groove, and will also fully consider the distribution and concentration of the leaking area. In areas where the leak is more concentrated, we will intentionally extend the length of each section of the anti-blocking rope. The beauty of this design is that it can ensure that the anti-blocking rope has enough length and range to tightly adhere to the inner wall of the V-shaped groove, forming a denser and more solid waterproof barrier.

[0045] S7: Apply waterproof mortar 7;

[0046] First, ensure that the prepared waterproof mortar has appropriate viscosity and fluidity, then use a special application tool or technique to apply the waterproof mortar to the previously excavated V-groove, and seal the anti-blocking rope in the V-groove. This step is to form a solid and waterproof protective layer, effectively close the leakage cracks, ensure that water cannot penetrate, and thus enhance the overall waterproof performance of the structure. During the application process, care should be taken to avoid the generation of bubbles and hollows to ensure the durability and reliability of the waterproof effect.

[0047] S8: leveling and compacting 8;

[0048] Use professional leveling tools to evenly and fully fill the V-shaped groove with mortar to ensure that every angle is covered. Then, compaction is performed to enhance the close bonding between the mortar and the groove wall, and to improve the density and stability of the waterproof layer. Finally, carefully check and use appropriate tools to gently scrape off the excess waterproof mortar that may protrude from the concrete surface to make the surface smooth and beautiful, while avoiding affecting subsequent construction or causing unnecessary damage.

[0049] S9: film covering and curing 9;

[0050] In specific operations, a reliable and breathable curing membrane should be selected and tightly attached to the concrete surface coated with waterproof mortar. The curing membrane should be fully covered without omission to ensure that the mortar layer is in a good moisturizing environment. At the same time, the curing time should be reasonably arranged according to weather conditions and construction requirements. It usually lasts from several days to several weeks until the mortar layer reaches the strength and performance required by the design.

[0051] It reduces the evaporation of water on the mortar surface by covering it with a protective film, thereby controlling its drying speed and promoting the full internal hydration reaction. Appropriate humidity and temperature conditions help optimize the internal structure of the mortar and improve its density and impermeability.

[0052] In the above embodiment, the mortar waterproofing agent includes: 6-20wt% sodium dodecylbenzene sulfonate, 1.2-18wt% oleoyl polypeptide complex, 5-15wt% silicate, 20-40wt% calcium hydroxide and 7-67.8wt% water; and the weight ratio of sodium dodecylbenzene sulfonate to oleoyl polypeptide complex is 1:(0.2-0.9), or 1:(0.5-0.7).

[0053] The preparation method of a mortar waterproofing agent comprises the following steps: adding sodium dodecylbenzene sulfonate into water, stirring and dissolving to form a dissolving solution; adding an oleoyl polypeptide complex into the dissolving solution, stirring evenly to form a primary solvent; adding three-fifths of calcium hydroxide into the primary solvent, stirring to form an intermediate solvent; adding the remaining calcium hydroxide, stirring evenly, and then adding silicate, stirring to form a waterproofing agent.

[0054] The mortar waterproofing agent is added in an amount of 0.15-0.25wt% of the total amount of cement in the mortar.

[0055] Mortar waterproofing agent uses silicate, sodium dodecylbenzene sulfonate, and oleoyl polypeptide complexes to interact in a calcium hydroxide environment, introducing structures such as -COO-, -COONa, and -SO3Na to efficiently chelate Ca2+, Al3+ ions in cement, thereby forming a stable and dense waterproof layer, solving the problem of poor compatibility and easy stratification and fracture between organic polymers and inorganic cement; at the same time, it gives the waterproofing agent hydrophobic properties, improves the workability, crack resistance and waterproof performance of the mortar as a whole, and acts as an additional waterproof layer in conjunction with the concrete self-waterproofing structure to completely solve the problem of water leakage.

[0056] In the above embodiment, the oleoyl polypeptide complex is a combination of one or more of N-oleoyl polypeptide, sodium N-oleoyl polypeptide, and N-alkanoyl polypeptide; the silicate is a combination of one or more of sodium silicate, lithium silicate, aluminum silicate, and calcium silicate.

[0057] In the above implementation mode, the material requirements during the construction process are as follows:

[0058] The testing requirements for waterproofing agents should comply with the requirements of "Mortar and Concrete Waterproofing Agents" JC474; ordinary silicate cement and silicate cement should be used, and the strength grade should not be less than 32.5Mpa. It is strictly forbidden to use expired or damp cement, and cement of different brands or strength grades should not be mixed; the sand used for mortar waterproofing layer should be medium sand, with a mud content of no more than 1%, and a sulfide and sulfate content of no more than 1%; the sand and gravel used for waterproof concrete should be composed of medium sand and gravel, and the mud content of medium sand should be no less than 1%. The mud content should not exceed 3.0%, the mud content should not exceed 1.0%, and sea sand should not be used; the maximum particle size of gravel should not be greater than 40mm, and its maximum particle size during pumping should be 1 / 4 of the delivery pipe diameter, the mud content should not exceed 1.0%, the mud content should not exceed 0.5%, and the water absorption rate should not be greater than 1.5%; other requirements for sand and gravel should comply with the provisions of "Standard for Quality and Inspection Methods of Sand and Stone for Ordinary Concrete" JGJ52-2006; water should comply with the provisions of "Standard for Water Used in Concrete" JGJ63-2006.

[0059]

Test of waterproof performance of roof

[0060] In order to determine the optimal addition amount of the waterproofing agent, the present invention designed a performance test experiment, selected the formula composition of the above-mentioned mortar waterproofing agent, and selected 0.1%, 0.16%, 0.2%, 0.24%, and 0.3% by mass percentage to be added to the same quality and amount of waterproof mortar, respectively. The specific test data are shown in Table 1.

[0061] Table 1 Performance data of mortar without and with waterproofing agent in different mass ratios

[0062]

[0063] It can be seen that the shrinkage rate of the mortar added with waterproofing agent is significantly reduced, and the shrinkage rate gradually decreases as the amount of admixture added increases, the strength increases, the water permeability pressure ratio increases, and the water absorption decreases; it can be seen that the amount of waterproofing agent added directly affects its comprehensive performance, and the larger the amount added, the better the performance. Considering the economic benefits and the national requirements for the amount of admixture added, an addition amount of 0.2% is most appropriate.

[0064] At the same time, the mortar added with the mortar waterproofing agent of the present invention has a better waterproof and anti-seepage effect, improves the waterproof and anti-seepage performance of the waterproof mortar, eliminates the problem of water leakage between two waterproof layers, simplifies the construction process, reduces the construction period, and increases the waterproof life.

[0065] In the description of this specification, the terms "connection", "installation", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0066] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for repairing water leakage in a basement roof, characterized in that: The following steps are involved: Clean the top slab area, identify the leakage area, and clean the basement top slab surface until the top slab concrete structure is exposed; Dig a V-shaped groove along the leakage cracks in the roof and dig a V-shaped groove; A waterproof mortar is prepared, wherein the mortar comprises cement, sand and water, wherein the mass ratio of cement to sand is 1:2-3, and the mass ratio of cement to water is 1:0.4-0.6, wherein a mortar waterproofing agent is added to the water, and the mass ratio of the mortar waterproofing agent to water is prepared at a ratio of 1:200, and the mortar waterproofing agent comprises 6-20% sodium dodecylbenzene sulfonate; 1.2-18% oleoyl polypeptide complex; 5-15% silicate; 20-40% calcium hydroxide; and 7-67.8% water; Immerse the anti-blocking rope, select a hemp rope with a diameter of 8-10mm as the anti-blocking rope, and immerse it in the prepared waterproof mortar so that its surface is evenly coated with waterproof mortar; Initial blocking: press the anti-blocking rope immersed in waterproof mortar into the V-shaped groove along the groove of the V-shaped groove to fix it in the V-shaped groove; Apply waterproof mortar, apply the prepared waterproof mortar to the excavated V-shaped groove, and seal the anti-blocking rope in the V-shaped groove; Cover and maintain the film to complete the waterproof construction.

2. A method for repairing water leakage in a basement roof according to claim 1, characterized in that: The depth of the V-groove is 20-30mm.

3. A method for repairing water leakage in a basement roof according to claim 2, characterized in that: The width of the V-shaped groove is at least 25 mm.

4. A method for repairing water leakage in a basement roof according to claim 1, characterized in that: Before the anti-blocking rope is immersed in the waterproof mortar, the anti-blocking rope needs to be roughened, and the surface of the anti-blocking rope is scratched with a tool to form roughened fibers on the surface of the anti-blocking rope that are interconnected with the anti-blocking rope body.

5. A method for repairing water leakage in a basement roof according to claim 1, characterized in that: The cement used in the waterproof mortar is 32.5 silicate cement.

6. A method for repairing water leakage in a basement roof according to claim 1, characterized in that: After applying the waterproof mortar, it is necessary to smooth and compact it. Use tools to fully apply the waterproof mortar in the excavated V-groove and compact it. Finally, scrape off the waterproof mortar protruding from the concrete surface.

7. A method for repairing water leakage in a basement roof according to claim 1, characterized in that: The weight ratio of sodium dodecylbenzene sulfonate to oleoyl polypeptide complex = 1: (0.2-0.9).

8. A method for repairing water leakage in a basement roof according to claim 1, characterized in that: The weight ratio of sodium dodecylbenzene sulfonate to oleoyl polypeptide complex = 1: (0.5-0.7).

9. A method for repairing water leakage in a basement roof according to claim 1, characterized in that: The oleoyl polypeptide complex is a combination of one or more of N-oleoyl polypeptide, sodium N-oleoyl polypeptide, and N-alkanoyl polypeptide.

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