Construction method of high-performance phosphorus II type anhydrite-based tile adhesive

Abstract

The invention relates to the technical field of phosphating waste residue treatment, in particular to a construction method of a high-performance phosphorus II type anhydrite-based tile adhesive. The ceramic tile glue is prepared from the following raw materials in parts by weight: 45 to 60 parts of phosphorus II type anhydrite, 30 to 40 parts of quartz sand, 3 to 5 parts of cement, 3 to 5 parts of metakaolin, 2 to 5 parts of mineral powder, 2 to 5 parts of silica fume, 0.6 to 1.8 parts of latex powder, 0.05 to 0.12 part of a water reducing agent, 0.1 to 0.25 part of cellulose ether, a waterproof agent and 0.10 to 0.15 part of a retarder. During construction, a thick layer is not needed to be smeared, only a thin layer is needed, and if the construction process reaches the standard, the ceramic tiles are very firmly adhered. And the construction steps are simple, the brick can be used by adding water and stirring on site, and the brick can be tiled without soaking the brick and wetting the wall. In addition, hollowing and cracking can be eliminated, the reworking possibility is reduced, and the bonding strength is very high.

Description

Technical Field

[0001] The invention relates to the technical field of phosphating waste residue treatment, in particular to a construction method of high-performance phosphorus II type anhydrous gypsum-based tile adhesive. Background Art

[0003] Traditional tile adhesives are mainly cement-based and widely used in exterior wall tiling. With the ban on exterior wall veneer tiles, the industry structure of tile adhesives is facing adjustments, and the application scenarios have shifted from outdoor to indoor, creating favorable conditions for the launch and application of gypsum-based indoor tile adhesives, and the prospects are broad.

[0004] At present, the floating floor insulation and sound insulation system and the elastic cushion floating floor insulation and sound insulation system for residential buildings have been fully promoted in East China and Sichuan and Chongqing. Both systems use a large amount of self-leveling gypsum to replace traditional fine stone concrete as leveling material; in addition, Guizhou Province vigorously promotes gypsum-based self-leveling mortar, which is subsequently mainly used to stick floor tiles for surface decoration, so the market demand for tile adhesive is huge.

[0005] In summary, making full use of phosphogypsum in the production of tile adhesive and construction is the current key research direction. Summary of the invention

[0006] In order to solve the above technical problems existing in the prior art, the present invention provides a construction method of high-performance phosphorus II type anhydrous gypsum-based tile adhesive, characterized in that it comprises the following steps:

[0007] (1) Mixing: accurately mix according to the weight ratio, and stir and mix phosphorus type II anhydrous gypsum, quartz sand, cement, metakaolin, mineral powder, silica fume, latex powder, water reducing agent, cellulose ether, waterproofing agent, and retarder evenly;

[0008] (2) Slurrying: Add 20-22% water to the mixed materials and stir evenly to make slurry;

[0009] (3) Laying: Apply the prepared tile adhesive to the entire back of the tile and then lay it.

[0010] Furthermore, in the step (1), the weight ratio of each raw material is 45-60 parts of phosphorus type II anhydrous gypsum, 30-40 parts of quartz sand, 3-5 parts of cement, 3-5 parts of kaolin, 2-5 parts of mineral powder, 2-5 parts of silica fume, 0.6-1.8 parts of latex powder, 0.05-0.12 parts of water reducing agent, 0.1-0.25 parts of cellulose ether, and 0.10-0.15 parts of waterproofing agent and retarder.

[0011] Furthermore, the phosphorus type II anhydrous gypsum is a powder material obtained by calcining phosphogypsum at a certain temperature and using type II anhydrous gypsum as a main component, and then grinding and modifying it.

[0012] The phosphorus type II anhydrous gypsum is mainly an anhydrous gypsum prepared by medium-high temperature calcination (600°C-850°C). The harmless transformation of harmful impurities is achieved by medium-temperature calcination, the negative impact of harmful impurities on the performance of phosphogypsum is eliminated, and the performance and quality stability of downstream products are guaranteed. The cementitious material after active activation has the characteristics of fast coagulation and hardening, slight volume expansion, high bonding strength, etc., which is highly consistent with the index requirements of indoor tile adhesive technology and wall bonding materials, and the main hydration product of the cementitious material, calcium sulfate dihydrate, has good compatibility with the gypsum base material; the cement is P·O 42.5.

[0013] Furthermore, the quartz sand is quartz particles obtained by crushing quartz stone, wherein the mass content of 30-70 mesh sand is 60-65%, and the mass content of 70-120 mesh sand is 35-40%.

[0014] Furthermore, the cement has a P·O content of 42.5.

[0015] Furthermore, the water reducer is a polycarboxylic acid high performance water reducer.

[0016] Furthermore, the cellulose is hydroxypropyl methyl cellulose with a viscosity of 80,000 Pa·s to 120,000 Pa·s.

[0017] Furthermore, the mineral powder is slag powder obtained by grinding the slag from the steel plant with a small amount of gypsum, and its specific surface area reaches 450-500 m2 / kg and its activity index reaches above 95 (S95 grade).

[0018] Furthermore, the metakaolin is a product formed after kaolin is calcined at high temperature. The high temperature calcination is calcined at 500-900°C. The final main component is amorphous aluminum silicate. It is widely used in the construction industry. Because it has volcanic ash activity, it can react with calcium hydroxide to form gelling substances such as hydrated calcium silicate, which can improve the strength and durability of materials such as concrete.

[0019] Furthermore, the silica fume is obtained by collecting and treating the smoke and dust emitted with the exhaust gas during the high-temperature smelting of industrial silicon and ferrosilicon in industrial electric furnaces through special capture devices; the main component is silicon dioxide, and its content can generally reach 85%-97%. Its particles are extremely small, with an average particle size of about 0.1-0.3μm, which is one hundredth of the particle size of cement particles. It has many applications in the field of building materials. For example, adding silica fume to concrete can fill the gaps between cement particles and improve the strength and density of concrete; it can also improve the durability of concrete and enhance its anti-seepage and anti-chemical erosion properties. In the refractory industry, silica fume can also increase the strength and density of refractory materials.

[0020] Furthermore, the latex powder is VAE redispersible latex powder.

[0021] Furthermore, the waterproofing agent is a chemical agent that can play a waterproofing role. In terms of ingredients, there are waterproofing agents with fatty acids as the main component, and waterproofing agents with silicone as the main component. For example, fatty acid waterproofing agents can react with components in cement to form a hydrophobic film in the pores of materials such as concrete to prevent the entry of water. In the field of construction, adding waterproofing agents to cement mortar or concrete can improve the waterproof performance of these building materials and be used in construction in places such as basements and pools that are easily exposed to water. In the textile industry, waterproofing agents can be used to treat fabrics to make the fabrics waterproof, just like some outdoor clothing can withstand rain after being treated with waterproofing agents.

[0022] Furthermore, the retarder is a protein-based gypsum retarder.

[0023] Furthermore, the uniform mixing in step (1) is achieved by placing the mixture into a mixing device and stirring for 20-30 minutes.

[0024] Furthermore, the water in step (2) is deionized water or tap water.

[0025] Furthermore, the uniform stirring in step (2) is performed by using a high-speed forced stirrer.

[0026] Furthermore, the stirring in step (2) is uniform, which is firstly slowly stirred for 60-90 seconds, and then quickly stirred for 90-180 seconds until a slurry is formed.

[0027] Furthermore, in the step (3), the tile adhesive overflows from the gaps after paving.

[0028] Furthermore, in the step (3), the base layer on which the tiles are to be laid is also coated with the tile adhesive, with a coating thickness of 1-5 mm.

[0029] Compared with the prior art, the technical effects created by the present invention are embodied in:

[0030] This application does not need to be applied in a thick layer, only a thin layer is needed. If the construction process is up to standard, the tiles will be very firmly adhered. In addition, the construction steps of this application are simple. It can be used by adding water and stirring on site. The tiles can be laid without soaking the walls. This application can also eliminate hollowing and cracking, reduce the possibility of rework, and has a high bonding strength. DETAILED DESCRIPTION

[0031] The technical solution of the present invention is further defined below in conjunction with specific implementation methods, but the scope of protection required is not limited to the description.

[0032] Example 1

[0033] High-performance phosphorus II anhydrous gypsum-based tile adhesive is made of the following raw materials in parts by weight: 45 parts of phosphorus II anhydrous gypsum, 40 parts of quartz sand, 5 parts of cement, 5 parts of metakaolin, 3 parts of mineral powder, 2 parts of silica fume, 0.8 parts of latex powder, 0.05 parts of water reducer, 0.1 parts of cellulose ether, and 0.15 parts of retarder.

[0034] (1) Mixing: according to the weight ratio, put the materials such as phosphorus type II anhydrous gypsum, quartz sand, cement, metakaolin, mineral powder, silica fume, latex powder, water reducer, cellulose ether, waterproofing agent, retarder into the mixing equipment and stir them thoroughly for 15 minutes to obtain high-performance phosphorus type II anhydrous gypsum-based tile adhesive;

[0035] (2) Slurry preparation: Add 20% deionized water or tap water to the mixed material, stir evenly to make a paste, and test according to the standard "Ceramic Tile Adhesive (JC / T 547-2017)".

[0036] Example 2

[0037] High-performance phosphorus type II anhydrous gypsum-based tile adhesive is made of the following raw materials in parts by weight: 55 parts of type II anhydrous gypsum, 30 parts of quartz sand, 5 parts of cement, 5 parts of metakaolin, 3 parts of mineral powder, 2 parts of silica fume, 1.1 parts of latex powder, 0.07 parts of water reducer, 0.1 parts of water retaining agent, and 0.16 parts of retarder.

[0038] (1) Mixing: according to the weight ratio, put the materials such as phosphorus type II anhydrous gypsum, quartz sand, cement, metakaolin, mineral powder, silica fume, latex powder, water reducer, cellulose ether, waterproofing agent, retarder into the mixing equipment and stir them thoroughly for 20 minutes to obtain high-performance phosphorus type II anhydrous gypsum-based tile adhesive;

[0039] (2) Pulping: Pulping: Add 20% deionized water or tap water to the mixed material, stir evenly to make a paste, and test according to the standard "Ceramic Tile Adhesive (JC / T547-2017)".

[0040] Example 3

[0041] High-performance phosphorus II type anhydrous gypsum-based tile adhesive is made of the following raw materials in parts by weight: 55 parts of type II anhydrous gypsum, 30 parts of quartz sand, 5 parts of cement, 5 parts of metakaolin, 3 parts of mineral powder, 2 parts of silica fume, 1.2 parts of latex powder, 0.09 parts of water reducer, 0.12 parts of water retaining agent, and 0.18 parts of retarder.

[0042] (1) Mixing: according to the weight ratio, put the materials such as phosphorus type II anhydrous gypsum, quartz sand, cement, metakaolin, mineral powder, silica fume, latex powder, water reducer, cellulose ether, waterproofing agent, retarder into the mixing equipment and stir them thoroughly for 20 minutes to obtain high-performance phosphorus type II anhydrous gypsum-based tile adhesive;

[0043] (2) Slurry preparation: Add 20% deionized water or tap water to the mixed material, stir evenly to make a paste, and test according to the standard "Ceramic Tile Adhesive (JC / T 547-2017)".

[0044] Example 4

[0045] High-performance phosphorus II type anhydrous gypsum-based tile adhesive is made of the following raw materials in parts by weight: 55 parts of type II anhydrous gypsum, 30 parts of quartz sand, 5 parts of cement, 5 parts of metakaolin, 3 parts of mineral powder, 2 parts of silica fume, 1.2 parts of latex powder, 0.12 parts of water reducing agent, 0.12 parts of water retaining agent, and 0.18 parts of retarder.

[0046] (1) Mixing: according to the weight ratio, put the materials such as phosphorus type II anhydrous gypsum, quartz sand, cement, metakaolin, mineral powder, silica fume, latex powder, water reducer, cellulose ether, waterproofing agent, retarder into the mixing equipment and stir them thoroughly for 20 minutes to obtain high-performance phosphorus type II anhydrous gypsum-based tile adhesive;

[0047] (2) Slurry preparation: Add 20% deionized water or tap water to the mixed material, stir evenly to make a paste, and test according to the standard "Ceramic Tile Adhesive (JC / T 547-2017)".

[0048] Comparative Example 1

[0049] Use commercial tile adhesive to make the slurry according to the package instructions.

[0050] In order to further illustrate that the present invention can achieve the technical effect, the tensile bonding strength / MPa, tensile bonding strength after immersion in water / MPa, tensile bonding strength after heat aging / MPa, tensile bonding strength after freeze-thaw cycle / MPa, and air-standing time ≥20min of the slurry prepared in Example 1 of the gypsum-based tile adhesive comparative example 1 in the application process are tested, and the specific experimental results are shown in Table 1.

[0051] Finally, it should be pointed out that the above embodiments are only representative examples of the present invention.

[0052]

[0053] However, the technical solution of the present invention is not limited to the above-mentioned embodiments, and there are many variations. All variations that can be directly derived or associated with the content disclosed by ordinary technicians in this field should be considered as the protection scope of the present invention.

Claims

1. A construction method of high-performance phosphorus II anhydrous gypsum-based tile adhesive, characterized in that: The steps include: (1) Mixing: accurately mix according to the weight ratio, and stir and mix phosphorus type II anhydrous gypsum, quartz sand, cement, metakaolin, mineral powder, silica fume, latex powder, water reducing agent, cellulose ether, waterproofing agent, and retarder evenly; (2) Slurrying: Add 20-22% water to the mixed materials and stir evenly to make slurry; (3) Laying: Apply the prepared tile adhesive to the entire back of the tile and then lay it.

2. The construction method of high-performance phosphorus II type anhydrous gypsum-based tile adhesive according to claim 1, characterized in that: In the step (1), the weight proportion of each raw material is 45-60 parts of phosphorus type II anhydrous gypsum, 30-40 parts of quartz sand, 3-5 parts of cement, 3-5 parts of kaolin, 2-5 parts of mineral powder, 2-5 parts of silica fume, 0.6-1.8 parts of latex powder, 0.05-0.12 parts of water reducing agent, 0.1-0.25 parts of cellulose ether, and 0.10-0.15 parts of waterproofing agent and retarder.

3. The construction method of high-performance phosphorus II type anhydrous gypsum-based tile adhesive according to claim 1, characterized in that: The phosphorus type II anhydrous gypsum is a powder material obtained by calcining phosphogypsum at a certain temperature and taking type II anhydrous gypsum as the main component, and then grinding and modifying it.

4. The construction method of high-performance phosphorus II type anhydrous gypsum-based tile adhesive according to claim 1, characterized in that: The uniform mixing in step (1) is achieved by placing the mixture into a mixing device and stirring for 20-30 minutes.

5. The construction method of high-performance phosphorus II type anhydrous gypsum-based tile adhesive according to claim 1, characterized in that: The water in step (2) is deionized water or tap water.

6. The construction method of high-performance phosphorus II anhydrous gypsum-based tile adhesive according to claim 1, characterized in that: The uniform stirring in step (2) is carried out by using a high-speed forced stirrer.

7. The construction method of high-performance phosphorus II type anhydrous gypsum-based tile adhesive according to claim 1, characterized in that: The stirring in step (2) is uniform, which is firstly slow stirring for 60-90 seconds, and then fast stirring for 90-180 seconds, until a slurry is formed.

8. The construction method of high-performance phosphorus II type anhydrous gypsum-based tile adhesive according to claim 1, characterized in that: In the step (3), the tile adhesive overflows from the gaps after paving.

9. The construction method of high-performance phosphorus II type anhydrous gypsum-based tile adhesive according to claim 1, characterized in that: In the step (3), the base layer on which the tiles are to be laid is also coated with the tile adhesive.

10. The construction method of high-performance phosphorus II anhydrous gypsum-based tile adhesive according to claim 9, characterized in that: The thickness of the tile adhesive coating on the base layer in step (3) is 1-5 mm.

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