Basement side wall waterproof leakage maintenance method

Abstract

The invention provides a basement side wall waterproof leakage maintenance method which comprises the following steps: determining a leakage area by cleaning a wall surface; a V-shaped groove is dug; preparing waterproof mortar; waterproof mortar is smeared; screeding and compacting are conducted; according to the six working procedures, a mortar waterproof agent is added into mortar, internal silicate reacts with a hydration product of cement to generate gel containing silicic acid groups, and the gel serves as an aggregate component to fill and plug pores in concrete in the growth process, so that communication of capillary channels is cut off, and the concrete is prevented from being damaged. The porosity in the concrete is reduced, and the compactness and the impermeability are improved; by adding waterproof mortar into the V-shaped groove of the concrete in cooperation with subsequent procedures, the contact between the internal reaction of the concrete and outside air is blocked, carbon dioxide in the air is prevented from entering the concrete, the service life of the concrete is prolonged, and the water leakage prevention performance of the concrete is improved.

Description

Technical Field

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

[0002] 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.

[0003] Rigid waterproofing has existed since the founding of the People's Republic of China, but in the early years, due to the bottleneck of technology, the waterproofing leakage and other problems were not completely solved, and it was gradually replaced by flexible waterproofing. This year, with the popularization of new technologies and new materials, rigid waterproofing technology has been greatly improved. In addition, flexible waterproofing still cannot completely solve the leakage problem in underground waterproofing projects. Rigid waterproofing is gradually being accepted by the market due to its low cost, short construction period and good effect.

[0004] The currently used "rigid-flexible combination" waterproofing technology is to apply a flexible waterproof layer on the outside of the structure to make up for the waterproof defects of the structural concrete. However, the flexible waterproofing is not well combined with the concrete surface, which is prone to stratification or water leakage, resulting in repeated leakage. Summary of the invention

[0005] In view of the problems existing in the prior art, the present invention provides a basement side wall waterproof leakage repair method, comprising the following steps:

[0006] Clean the wall, identify the leakage area, and clean the basement side wall surface until the concrete structure surface is exposed;

[0007] Dig a V-shaped groove along the leakage cracks;

[0008] 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;

[0009] Apply waterproof mortar and apply the prepared waterproof mortar into the excavated V-shaped groove;

[0010] Cover and maintain the film to complete the waterproof construction.

[0011] 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.

[0012] In some embodiments, the cement used in the waterproof mortar is 32.5 silicate cement.

[0013] In some embodiments, the weight ratio of sodium dodecylbenzene sulfonate to oleoyl polypeptide complex=1:(0.2-0.9).

[0014] In some embodiments, the weight ratio of sodium dodecylbenzene sulfonate to oleoyl polypeptide complex = 1:(0.5-0.7).

[0015] 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.

[0016] In some embodiments, the silicate is a combination of one or more of sodium silicate, lithium silicate, aluminum silicate, and calcium silicate.

[0017] 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.

[0018] 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

[0019] Figure 1A flowchart of the overall steps of a basement side wall waterproof leakage repair method provided by an embodiment of the present invention is shown.

[0020] Explanation of symbols

[0021] 1. Clean the wall and identify the leakage area; 2. Dig a V-shaped groove; 3. Prepare cement mortar; 4. Apply waterproof mortar; 5. Smooth and compact; 6. Cover with film for maintenance. DETAILED DESCRIPTION

[0022] Hereinafter, preferred embodiments (or implementation modes) of the present invention will be described in detail with reference to the accompanying drawings.

[0023] The invention provides a method for repairing waterproof leakage of a basement side wall. The method sequentially comprises six steps of cleaning the wall surface, determining the leakage area, cutting a V-shaped groove, mixing waterproof mortar, applying waterproof mortar, leveling and compacting, and film covering and curing. A mortar waterproofing agent is added 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 the growth process, thereby cutting off the connection of the capillary channel, reducing the porosity inside the concrete, and improving the density and impermeability. In addition, in conjunction with subsequent steps, waterproof mortar is added into the V-shaped groove of the concrete, thereby blocking the contact between the internal reaction of the concrete and the outside air, preventing the entry of carbon dioxide in the air, increasing the service life of the concrete, and improving the anti-leakage property of the concrete.

[0024] Figure 1 A flowchart showing the overall steps of a basement side wall waterproof leakage repair method provided by an embodiment of the present invention is shown. Figure 1 As shown, a basement side wall waterproof leakage repair method comprises the following steps:

[0025] S1: Clean the wall and identify the leakage area 1;

[0026] First, the wall needs to be evaluated. Since there is a large area of ​​negative seepage on the wall surface, the scope of wall cleaning needs to be determined according to the scope of wall negative seepage, and the tools and equipment for wall cleaning need to be determined according to the material of the wall, and relevant plans need to be formulated to prevent circuit safety problems, water safety problems, or gas safety problems during the cleaning process. During the cleaning process, waste needs to be properly handled to ensure that the cleaning work is carried out in an orderly manner until the concrete in the leakage area of ​​the wall is exposed.

[0027] S2: excavating V-shaped groove 2;

[0028] First, we need to accurately locate the direction of the leakage cracks. Then, along these clear leakage paths, we use professional tools to chisel out V-shaped grooves on the concrete surface. 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 unnecessary damage.

[0029] The opening of the V-shaped groove not only facilitates the close embedding of the subsequent filling material, but also effectively disperses the profit 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 a role in extrusion and guidance for the extension of the filling material, improving the density of the groove filling.

[0030] S3: Mix cement mortar;

[0031] 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.

[0032] 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.

[0033] S4: Apply waterproof mortar;

[0034] First, ensure that the prepared waterproof mortar has appropriate strength and fluidity, and then use special application tools or techniques to apply the waterproof mortar to the previously excavated V-shaped groove. This step is to form a solid and waterproof protective layer, effectively seal 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.

[0035] S5: Smoothing and compacting;

[0036] 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.

[0037] S6: film covering and curing;

[0038] 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.

[0039] 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.

[0040] 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).

[0041] The preparation method of mortar waterproofing agent comprises the following steps: adding sodium dodecylbenzene sulfonate into water, stirring and dissolving to form a dissolving solution; adding 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, adding silicate, stirring to form a waterproofing agent. The mortar waterproofing agent is added and used according to 0.15-0.25wt% of the total amount of cement in the mortar.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] In the above implementation mode, the material requirements during the construction process are as follows:

[0046] 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.

[0047]

Test of wall waterproof performance

[0048] 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.

[0049] Table 1 Performance data of mortar without and with waterproofing agent in different mass ratios

[0050]

[0051] 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.

[0052] 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.

[0053] 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 waterproof leakage of basement side wall, characterized in that: The following steps are involved: Clean the wall, identify the leakage area, and clean the basement side wall surface until the concrete structure surface is exposed; Dig a V-shaped groove along the leakage cracks; 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; Apply waterproof mortar and apply the prepared waterproof mortar into the excavated V-shaped groove; Cover and maintain the film to complete the waterproof construction.

2. A basement side wall waterproof leakage repair method 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.

3. A basement side wall waterproof leakage repair method according to claim 1, characterized in that: The cement used in the waterproof mortar is 32.5 silicate cement.

4. A basement side wall waterproof leakage repair method according to claim 1, characterized in that: The weight ratio of sodium dodecylbenzene sulfonate to oleoyl polypeptide complex = 1: (0.2-0.9).

5. A basement side wall waterproof leakage repair method according to claim 1, characterized in that: The weight ratio of sodium dodecylbenzene sulfonate to oleoyl polypeptide complex = 1: (0.5-0.7).

6. A basement side wall waterproof leakage repair method 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.

7. A basement side wall waterproof leakage repair method according to claim 1, characterized in that: The silicate is a combination of one or more of sodium silicate, lithium silicate, aluminum silicate and calcium silicate.

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