Special putty for wall saltpetering and production method thereof

Abstract

The invention provides special putty for wall saltpetering and a production method thereof, and relates to the technical field of building decoration materials. The special putty for the saltpetering of the wall surface comprises the following components in parts by weight: 25-35 parts of Portland cement, 15-25 parts of silica fume, 15-25 parts of composite quartz powder, 8-12 parts of modified bentonite, 3-7 parts of cellulose, 2-4 parts of capillary crystalline, 2-4 parts of a lubricant, 2-4 parts of a water repellent agent, 5-8 parts of an anti-alkali agent, 2-4 parts of a binder and 2-4 parts of an auxiliary agent, the composite quartz powder is formed by compounding quartz powder and modified quartz powder according to a mass ratio of 1: 1. The special putty for wall saltpetering can generate good moisture-proof and anti-saltpetering effects when being directly applied to a wall body, effectively inhibits the occurrence of the wall saltpetering problem, and is environment-friendly and convenient to construct; meanwhile, the production method disclosed by the invention is simple and feasible, and is suitable for large-scale industrial production.

Description

Technical Field

[0001] The invention relates to the technical field of building decoration materials, in particular to a special putty for wall efflorescence and a production method thereof. Background Art

[0002] Wall efflorescence is a common and challenging problem in architectural decoration projects. It occurs when alkaline components in the wall cement dissolve and gradually seep into the wall surface with water, resulting in the appearance of white powder on the wall. This phenomenon not only severely impacts the aesthetics of the wall but can also cause cracking and shedding of the putty layer, reducing wall stability and posing a threat to human health.

[0003] Currently, the main solutions to the problem of wall efflorescence on the market include wall repair methods such as grinding, water washing, and pickling, but these methods have many drawbacks. For example, grinding and water washing have limited effects and are difficult to fundamentally solve the problem; although pickling has a certain effect, oxalic acid will corrode the metal materials on the wall, causing damage to the wall, and oxalic acid is also harmful to the human body, and will have an adverse effect on construction workers during construction. In addition, some existing putty products have deficiencies in moisture and alkali resistance and cannot effectively suppress the occurrence of wall efflorescence. Therefore, it is of great practical significance to develop a special putty and its production method that can effectively solve the problem of wall efflorescence, is environmentally friendly, and is easy to construct. Summary of the Invention

[0004] (1) Technical problems solved In response to the deficiencies in the prior art, the present invention provides a special putty for wall efflorescence and a production method thereof, which solves the problems raised by the above-mentioned background technology. The putty can produce good moisture-proof and anti-alkali effects when directly applied to the wall, effectively inhibiting the occurrence of wall efflorescence problems, and is environmentally friendly and easy to construct. At the same time, the production method of the present invention is simple and easy to implement, and is suitable for large-scale industrial production.

[0005] (2) Technical solution To achieve the above objectives, the present invention is implemented through the following technical solutions: a special putty for wall efflorescence, comprising the following components in parts by weight: 25-35 parts of Portland cement, 15-25 parts of silica fume, 15-25 parts of composite quartz powder, 8-12 parts of modified bentonite, 3-7 parts of cellulose, 2-4 parts of osmotic crystallizer, 2-4 parts of lubricant, 2-4 parts of hydrophobic agent, 5-8 parts of anti-alkali agent, 2-4 parts of binder, and 2-4 parts of additive; The composite quartz powder is a composite of quartz powder and modified quartz powder in a mass ratio of 1:1.

[0006] Preferably, the special putty for wall alkali efflorescence includes the following components in parts by weight: 30 parts of silicate cement, 20 parts of silica fume, 20 parts of composite quartz powder, 10 parts of modified bentonite, 5 parts of cellulose, 3 parts of osmotic crystallization, 3 parts of lubricant, 3 parts of hydrophobic agent, 7 parts of anti-alkali agent, 3 parts of binder, and 3 parts of additives.

[0007] Preferably, the osmotic crystallization is one of tartaric acid, sodium silicate or calcium chloride.

[0008] Preferably, the hydrophobic agent is an organosilicon waterproofing agent; the anti-alkali agent is a potassium silicate solution; the binder is sodium carboxymethyl cellulose; and the auxiliary agent includes 1-2 parts of calcium lignin sulfonate and 1-2 parts of a defoaming agent.

[0009] Preferably, the modified quartz powder is prepared by calcining the quartz powder at 750-850° C. for 20-30 minutes.

[0010] Preferably, the preparation method of the modified bentonite is: calcining the bentonite at 1050-1150°C for 8-12 minutes, placing the bentonite in a 0.1 mol / L calcium chloride solution for 30-40 minutes for modification, the mass volume ratio of bentonite to calcium chloride solution being 1g:8-12ml, and then drying to a water content of 20%-30%.

[0011] The present invention further discloses a production method of a special putty for wall efflorescence, which comprises the following steps based on the special putty for wall efflorescence as described above: Step 1: Get the material: Weigh silicate cement, silica fume, quartz powder, modified quartz powder, modified bentonite, cellulose, osmotic crystallizer, lubricant and hydrophobic agent, anti-alkali agent, binder and additives according to mass parts; Step 2: Premixing: Portland cement, silica fume, quartz powder and modified bentonite are premixed and sieved to remove impurities to obtain mixture A; Step 3: Remix: Premixing the modified quartz powder with the infiltration crystallization to obtain a mixture B; Step 4: Mixing: The mixture A, the mixture B, the cellulose, the lubricant and the hydrophobic agent, the anti-alkali agent, the binder and the auxiliary agent are mixed to prepare the special putty for wall alkali efflorescence.

[0012] Preferably, in step 1, the anti-alkali agent is heated to 60-70° C. and stirred evenly for later use.

[0013] Preferably, in step 2, the mesh size of the sieving is 200-250 meshes.

[0014] Preferably, in step 4, the mixing is performed by a dry powder mixing process, with a mixing time of 10-20 min and a mixing speed of 200-500 r / min.

[0015] (3) Beneficial effects The present invention provides a special putty for wall efflorescence and a production method thereof, which has the following beneficial effects: 1. The present invention adopts a composite addition method of quartz powder and modified quartz powder, which can effectively seal the concrete wall or the alkali-reflected wall, reduce the further diffusion of moisture in the atmosphere into the wall, aggravate the alkali-reflection problem, and provide space for the formation of dendritic crystals for infiltration crystallization, which is beneficial for the infiltration crystallization to play a moisture-proof role.

[0016] 2. The present invention utilizes high-temperature calcination and calcium chloride impregnation to modify bentonite, which can not only utilize bentonite to meet the moisture-proof and anti-alkali properties of the back-water putty paste, but also prevent the excessive expansion of bentonite from causing damage to the putty layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic flow chart of the production method of the present invention. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] Example 1: An embodiment of the present invention provides a special putty for wall alkali efflorescence, comprising the following components in parts by weight: 25 parts of silicate cement, 15 parts of silica fume, 15 parts of composite quartz powder, 8 parts of modified bentonite, 3 parts of cellulose, 2 parts of osmotic crystallizer, 2 parts of lubricant, 2 parts of hydrophobic agent, 5 parts of anti-alkali agent, 2 parts of binder, and 2 parts of additives; specifically, the hydrophobic agent is an organosilicon waterproofing agent; the anti-alkali agent is a potassium silicate solution; the binder is sodium carboxymethyl cellulose; and the additives include 1 part of calcium lignin sulfonate and 1 part of a defoaming agent.

[0020] The composite quartz powder is a composite of quartz powder and modified quartz powder in a mass ratio of 1:1, wherein the preparation method of the modified quartz powder is: calcining the quartz powder at 750° C. for 20 minutes to obtain the modified quartz powder.

[0021] Secondly, the preparation method of modified bentonite is: calcining bentonite at 1050°C for 8 minutes, then impregnating and modifying it, and drying it to obtain modified bentonite; the impregnation modification is specifically: placing the bentonite in a tartaric acid solution with a concentration of 0.1 mol / l and impregnating it for 30 minutes, the mass volume ratio of bentonite to calcium chloride solution is 1g:8ml, and drying is drying to a water content of 20%.

[0022] like Figure 1 As shown, the present invention also provides a production method of a special putty for wall efflorescence, based on the above special putty for wall efflorescence, comprising the following steps: Step 1: Get the material: Weigh silicate cement, silica fume, quartz powder, modified quartz powder, modified bentonite, cellulose, osmotic crystallization, lubricant and hydrophobic agent, anti-alkali agent, binder and additives according to mass; then, heat the anti-alkali agent to 60°C, stir evenly and set aside; Step 2: Premixing: Portland cement, silica fume, quartz powder and modified bentonite were premixed and sieved to remove impurities, with the sieve mesh number being 200 mesh to obtain mixture A; Step 3: Remix: Premixing the modified quartz powder with the infiltration crystallization to obtain a mixture B; Step 4: Mixing: Mixture A, mixture B, cellulose, lubricant and hydrophobic agent, anti-alkali agent, binder and additives are mixed by adopting dry powder mixing process, mixing time is 10 minutes, mixing speed is 200r / min, and special putty for wall alkali efflorescence is prepared.

[0023] Example 2: An embodiment of the present invention provides a special putty for wall alkali efflorescence, comprising the following components in parts by weight: 30 parts of silicate cement, 20 parts of silica fume, 20 parts of composite quartz powder, 10 parts of modified bentonite, 5 parts of cellulose, 3 parts of osmotic crystallizer, 3 parts of lubricant, 3 parts of hydrophobic agent, 7 parts of anti-alkali agent, 3 parts of binder, and 3 parts of additives; specifically, the hydrophobic agent is an organosilicon waterproofing agent; the anti-alkali agent is a potassium silicate solution; the binder is sodium carboxymethyl cellulose; and the additives include 1 part of calcium lignin sulfonate and 2 parts of a defoaming agent.

[0024] The composite quartz powder is a composite of quartz powder and modified quartz powder in a mass ratio of 1:1, wherein the preparation method of the modified quartz powder is: calcining the quartz powder at 800° C. for 25 minutes to obtain the modified quartz powder.

[0025] Secondly, the preparation method of modified bentonite is: calcining bentonite at 1100°C for 10 minutes, then impregnating and modifying it, and drying it to obtain modified bentonite; the impregnation modification is specifically: placing the bentonite in a calcium chloride solution with a concentration of 0.1 mol / l and impregnating it for 35 minutes, the mass volume ratio of bentonite to calcium chloride solution is 1g:10ml, and drying is drying to a water content of 25%.

[0026] like Figure 1 As shown, the present invention also provides a production method of a special putty for wall efflorescence, based on the above special putty for wall efflorescence, comprising the following steps: Step 1: Get the material: Weigh silicate cement, silica fume, quartz powder, modified quartz powder, modified bentonite, cellulose, osmotic crystallizer, lubricant and hydrophobic agent, anti-alkali agent, binder and additives according to mass; then, heat the anti-alkali agent to 65°C, stir evenly and set aside; Step 2: Premixing: Portland cement, silica fume, quartz powder and modified bentonite were premixed and sieved to remove impurities, with the mesh number of the sieve being 230 mesh, to obtain mixture A; Step 3: Remix: Premixing the modified quartz powder with the infiltration crystallization to obtain a mixture B; Step 4: Mixing: Mixture A, mixture B, cellulose, lubricant and hydrophobic agent, anti-alkali agent, binder and additives are mixed by adopting dry powder mixing process, mixing time is 15 minutes, mixing speed is 300r / min, and special putty for wall alkali efflorescence is prepared.

[0027] Example 3: An embodiment of the present invention provides a special putty for wall alkali efflorescence, comprising the following components in parts by weight: 35 parts of silicate cement, 25 parts of silica fume, 25 parts of composite quartz powder, 12 parts of modified bentonite, 7 parts of cellulose, 4 parts of osmotic crystallization, 4 parts of lubricant, 4 parts of hydrophobic agent, 8 parts of anti-alkali agent, 4 parts of binder, and 4 parts of additives; specifically, the hydrophobic agent is an organosilicon waterproofing agent; the anti-alkali agent is a potassium silicate solution; the binder is sodium carboxymethyl cellulose; and the additives include 2 parts of calcium lignin sulfonate and 2 parts of a defoaming agent.

[0028] The composite quartz powder is a composite of quartz powder and modified quartz powder in a mass ratio of 1:1, wherein the preparation method of the modified quartz powder is: calcining the quartz powder at 850° C. for 30 minutes to obtain the modified quartz powder.

[0029] Secondly, the preparation method of modified bentonite is: calcining bentonite at 1150°C for 12 minutes, then impregnating and modifying it, and drying it to obtain modified bentonite; the impregnation modification is specifically: placing the bentonite in a sodium silicate solution with a concentration of 0.1 mol / l and impregnating it for 40 minutes, the mass volume ratio of bentonite to calcium chloride solution is 1g:12ml, and drying is drying to a water content of 30%.

[0030] like Figure 1 As shown, the present invention also provides a production method of a special putty for wall efflorescence, based on the above special putty for wall efflorescence, comprising the following steps: Step 1: Get the material: Weigh silicate cement, silica fume, quartz powder, modified quartz powder, modified bentonite, cellulose, osmotic crystallization, lubricant and hydrophobic agent, anti-alkali agent, binder and additives according to mass; then, heat the anti-alkali agent to 70°C, stir evenly and set aside; Step 2: Premixing: Portland cement, silica fume, quartz powder and modified bentonite were premixed and sieved to remove impurities, with the mesh size of the sieve being 250 mesh, to obtain mixture A; Step 3: Remix: Premixing the modified quartz powder with the infiltration crystallization to obtain a mixture B; Step 4: Mixing: Mixture A, mixture B, cellulose, lubricant and hydrophobic agent, anti-alkali agent, binder and additives are mixed by adopting dry powder mixing process, mixing time is 20 minutes, mixing speed is 500r / min, and special putty for wall alkali efflorescence is prepared.

[0031] Comparative Example 1: Compared with Example 2, the quartz powder was not modified and was used directly, and other conditions remained unchanged.

[0032] Comparative Example 2: Compared with Example 2, the bentonite was not modified and was used directly, and other conditions remained unchanged.

[0033] Experimental example: Performance test: 1. Alkali Resistance Test: In accordance with relevant standards, use asbestos-free fiber cement board as the test panel, measuring 15070 (4-6) mm. Apply putty evenly to a thickness of 2 mm and cure for 7 days. After 7 days of curing, seal the edges and back with a mixture of paraffin wax and rosin (1:1 by mass), with a width of 2-4 mm. Add a saturated aqueous solution of calcium hydroxide to a glass or ceramic container, stir thoroughly, and seal. After 24 hours, remove the supernatant as the test liquid and immerse two-thirds of the test panel in the test liquid for 48 hours. After immersion, remove the test panel, rinse it with clean water, shake off any water droplets on the surface, and then absorb any water marks. Immediately inspect the panel for blistering, cracking, or powdering.

[0034] 2. Moisture resistance test: Place the test panel in an environment with a relative humidity of 90%, observe the moisture condition of the test panel over a certain period of time, and record the time when water droplets or moisture appear on the surface of the test panel.

[0035] 3. Bond strength test: According to relevant standards, use a pull-off instrument to test the bond strength between putty and wall.

[0036] The test results are shown in the following table:

[0037] It can be seen from the above test data that the special putty for wall efflorescence prepared in the embodiment of the present invention is superior to the comparative example in terms of alkali resistance, moisture resistance and bonding strength, indicating that the modification of quartz powder and bentonite can significantly improve the performance of the putty and effectively solve the problem of wall efflorescence.

[0038] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A special putty for wall efflorescence, characterized by: The invention comprises the following components in parts by weight: 25-35 parts of silicate cement, 15-25 parts of silica fume, 15-25 parts of composite quartz powder, 8-12 parts of modified bentonite, 3-7 parts of cellulose, 2-4 parts of osmotic crystallizer, 2-4 parts of lubricant, 2-4 parts of hydrophobic agent, 5-8 parts of anti-alkali agent, 2-4 parts of binder, and 2-4 parts of additive. The composite quartz powder is a composite of quartz powder and modified quartz powder in a mass ratio of 1:

1.

2. The wall alkali-resistant putty according to claim 1, characterized in that: The invention comprises the following components in parts by weight: 30 parts of silicate cement, 20 parts of silica fume, 20 parts of composite quartz powder, 10 parts of modified bentonite, 5 parts of cellulose, 3 parts of osmotic crystallization, 3 parts of lubricant, 3 parts of hydrophobic agent, 7 parts of anti-alkali agent, 3 parts of binder and 3 parts of additive.

3. The special putty for wall alkali treatment according to claim 1, characterized in that: The osmotic crystallization is one of tartaric acid, sodium silicate or calcium chloride.

4. The special putty for wall efflorescence according to claim 1, characterized in that: The hydrophobic agent is an organic silicon waterproofing agent; the anti-alkali agent is a potassium silicate solution; the binder is sodium carboxymethyl cellulose; and the auxiliary agent includes 1-2 parts of calcium lignin sulfonate and 1-2 parts of a defoaming agent.

5. The special putty for wall alkali efflorescence according to claim 1, characterized in that: The preparation method of the modified quartz powder is as follows: calcining the quartz powder at 750-850° C. for 20-30 minutes.

6. The special putty for wall efflorescence according to claim 1, characterized in that: The modified bentonite is prepared by calcining the bentonite at 1050-1150° C. for 8-12 minutes, immersing the bentonite in a 0.1 mol / L calcium chloride solution for 30-40 minutes, wherein the mass volume ratio of the bentonite to the calcium chloride solution is 1 g: 8-12 ml, and then drying the bentonite to a water content of 20%-30%.

7. A method for producing a special putty for wall efflorescence, based on the special putty for wall efflorescence according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1: Get the material: Weigh silicate cement, silica fume, quartz powder, modified quartz powder, modified bentonite, cellulose, osmotic crystallizer, lubricant and hydrophobic agent, anti-alkali agent, binder and additives according to mass parts; Step 2: Premixing: Portland cement, silica fume, quartz powder and modified bentonite are premixed and sieved to remove impurities to obtain mixture A; Step 3: Remix: Premixing the modified quartz powder with the infiltration crystallization to obtain a mixture B; Step 4: Mixing: The mixture A, the mixture B, the cellulose, the lubricant and the hydrophobic agent, the anti-alkali agent, the binder and the auxiliary agent are mixed to prepare the special putty for wall alkali efflorescence.

8. The method for producing a special putty for wall efflorescence according to claim 7, wherein: In step 1, the anti-alkali agent is heated to 60-70° C. and stirred evenly for later use.

9. The method for producing a special putty for wall efflorescence according to claim 7, wherein: In step 2, the mesh size of the sieving is 200-250 meshes.

10. The method for producing a special putty for wall efflorescence according to claim 7, characterized in that: In step 4, the mixing is carried out by a dry powder mixing process, the mixing time is 10-20 minutes, and the mixing speed is 200-500 r / min.

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