Anti-permeation window frame joint mortar, preparation method and application thereof

Abstract

The application belongs to the technical field of building materials, and particularly relates to a kind of anti-permeation window frame jointing mortar and its preparation method and application. The anti-permeation window frame jointing mortar comprises the following components by weight: P·O silicate cement, heavy calcium, lightweight aggregate, granite machine-made sand, microsilica powder, vinyl versatate modified latex powder, dry powder shrinkage compensator, type II ammonium polyphosphate flame retardant, and optional first additive. The key of the application lies in the introduction of dry powder shrinkage compensator with specific raw material formula composition and lightweight aggregate composed of 120-180 mesh hollow glass microspheres, 50-70 mesh vitrified microbeads and 12-16 mesh polystyrene particles with specific gradation. Through the synergistic effect between the double micro-expansion compensation of dry powder shrinkage compensator and the flexibility of lightweight aggregate, the obtained jointing mortar has high impermeability, good crack resistance and flame retardancy.

Description

Technical Field

[0001] This invention belongs to the field of building materials technology, specifically relating to a waterproof window frame mortar, its preparation method, and its application. Background Technology

[0002] Against the backdrop of global warming, typhoon disasters in coastal areas of my country exhibit significant characteristics: generally stable frequency but increasing intensity, expanding impact range, and intensified complex disasters. Future risks are expected to rise further. Therefore, the windproof and waterproof design of buildings in coastal areas is fundamental to ensuring the inherent safety, long-term use, and continued value of buildings, and is directly related to the overall disaster resilience and stable economic and social development of coastal cities. Statistics show that up to 30% of homeowners in coastal areas require window frame repairs due to water leakage, and 90% of the costs come from disassembling and reinstalling the window frames. Currently, the commonly used materials for sealing window frame gaps are polyurethane foam or cement mortar. However, polyurethane foam has low strength and cannot withstand wind loads exceeding level 7. Furthermore, it has poor weather resistance, ages under direct sunlight, and loses its sealing performance. Additionally, building foam has poor fire resistance and is classified as flammable or combustible, posing a potential fire hazard. Traditional cement mortar has a higher strength after curing than expanding foam, but it has poor adhesion to metal and PVC window frames. Shrinkage cracks are prone to occur at the interface, and cracks are very likely to appear at the corners of the window frame or at the joints with the wall, which become water seepage channels, seriously restricting the quality and service life of the building.

[0003] With increasingly stringent performance requirements for window frame sealant materials both domestically and internationally, particularly regarding impermeability, crack resistance, and flame retardancy, existing foamed adhesives or cement-based mortars have limitations in meeting these performance challenges. This has hindered the development of the construction industry and increased maintenance costs. Summary of the Invention

[0004] One of the objectives of this invention is to address the problem that existing cement-based joint filler mortars cannot simultaneously meet the performance requirements of high impermeability, good crack resistance, and flame retardancy. This invention provides a window frame joint filler mortar with high impermeability, good crack resistance, good sealing of the gap between the wall and the frame, thus effectively preventing rainwater from seeping in, and good flame retardancy and high safety.

[0005] The anti-seepage window frame grouting mortar comprises the following components by weight: 40-46 parts P·O silicate cement, 4-10 parts heavy calcium carbonate, 10-23 parts lightweight aggregate, 16-28 parts granite manufactured sand, 1.8-2.5 parts microsilica, 2-3.5 parts ethylene tert-carbonate modified latex powder, 3.5-5 parts dry powder shrinkage compensator, 4-7 parts type II ammonium polyphosphate flame retardant, and optional first additive; the lightweight aggregate consists of 120-180 mesh hollow glass microspheres, 50-70 mesh vitrified microspheres, and 12-16 mesh... The dry powder shrinkage compensator comprises the following components by weight: 35-50 parts high-alumina cement, 6-23 parts anhydrite powder, 11-25 parts P·I silicate cement, 4-10 parts quicklime powder, 1-1.6 parts alkaline activator, 5-20 parts slag powder, 0.5-1 part azodicarbonamide powder, 0.25-0.5 parts triglyceride monostearate powder, 0.5-1 part modified polyacrylamide superabsorbent resin, and an optional second additive; the alkaline activator is sodium sulfate and calcium formate.

[0006] The second objective of this invention is to provide a method for preparing the aforementioned anti-seepage window frame grouting mortar. The preparation method includes: weighing 40-46 parts by weight of P·O silicate cement, 4-10 parts by weight of heavy calcium carbonate, 10-23 parts by weight of lightweight aggregate, 16-28 parts by weight of granite manufactured sand, 1.8-2.5 parts by weight of microsilica, 2-3.5 parts by weight of ethylene tert-carbonate modified latex powder, 3.5-5 parts by weight of dry powder shrinkage compensator, 4-7 parts by weight of type II ammonium polyphosphate flame retardant, and optionally a first additive, followed by a second mixing treatment. The resulting mixture is the anti-seepage window frame grouting mortar.

[0007] A third objective of this invention is to provide the application of the aforementioned anti-seepage window frame mortar in filling the gaps between door / window frames and walls.

[0008] Beneficial effects: The joint-filling mortar formula provided by this invention includes P·O silicate cement, heavy calcium carbonate, lightweight aggregate, granite manufactured sand, silica fume, ethylene tert-carbonate modified latex powder, dry powder shrinkage compensator, and type II ammonium polyphosphate flame retardant in specific weight proportions. The key lies in the introduction of a dry powder shrinkage compensator with a specific raw material composition and lightweight aggregate composed of 120-180 mesh hollow glass microspheres, 50-70 mesh vitrified microspheres, and 12-16 mesh polystyrene particles with specific gradations. This is achieved through dry powder... The synergistic effect of the dual micro-expansion compensation of the shrinkage compensator and the flexibility of the lightweight aggregate, combined with the addition of a type II ammonium polyphosphate flame retardant that is compatible with the mortar system, results in a joint mortar with low drying shrinkage, high flexibility, and low water absorption. When used to fill gaps between frame edges and walls, it achieves excellent filling and sealing performance. After curing, it is virtually crack-free, exhibits good crack resistance and impermeability, and also has good flame retardancy, thus effectively preventing rainwater infiltration and improving fire safety.

[0009] The main reason for this is that the dual micro-expansion compensation effect of dry powder shrinkage compensator lies in its dual-stage expansion characteristics. It can compensate for shrinkage during both the initial plastic stage and the later hardening stage of the mortar curing process, reducing the dry shrinkage rate. Specifically, during the initial plastic stage of mortar curing, the azodicarbonamide in the dry powder shrinkage compensator preferentially decomposes in the alkaline environment generated by the cement-quicklime reaction, slowly and steadily releasing uniformly fine bubbles (including nitrogen, carbon dioxide, and a small amount of ammonia). Simultaneously, the triglyceride monostearate in the dry powder shrinkage compensator forms a high-strength, highly elastic molecular film at the gas-liquid interface, preventing bubble coalescence, rising, and rupture. This stabilizes the bubbles generated by the azodicarbonamide within the mortar, resulting in controllable and effective micro-expansion. This counteracts the plastic shrinkage deformation during the initial setting stage of the mortar, fundamentally reducing the generation of plastic shrinkage cracks and improving the crack resistance of the mortar. In practical applications, after water is added to the joint mortar, the modified polyacrylate superabsorbent resin will quickly absorb the mixing water during stirring. The water molecules combine with the carboxyl and amide groups on the molecular chain through hydrogen bonds, and swell in the three-dimensional cross-linked network to form uniformly dispersed hydrogel particles, thus completing the water storage. In the early hardening stage after the initial setting of the joint filler mortar, cement hydration continuously consumes free water in the capillaries. As the relative humidity inside the mortar gradually decreases to 94-96%, the external osmotic pressure of the mortar gradually increases. When the external osmotic pressure is higher than the internal pressure, the water stored during the mixing of the water-absorbing resin slowly migrates from the inside of the mortar to the surrounding mortar along the humidity gradient, thereby replenishing the water required for the hydration reaction. In the later hardening stage of the joint filler mortar, the internal humidity of the mortar further decreases, the large capillaries gradually empty, and the bound water in the water-absorbing resin gel, which is bound by hydrogen bonds, is further released. Part of this water is supplied to the high-alumina cement and anhydrite to react and form ettringite, which refines the pore structure and further compensates for the self-shrinkage and drying shrinkage generated during the later hardening of the joint filler mortar, reducing the drying shrinkage rate and cracking risk. The other part is supplied to ensure the full hydration of cement in the mortar system, improving the later curing strength of the mortar. Meanwhile, since window frame filling mortar is usually applied by hand in thick layers or by pressure injection using a cement mortar caulking gun, the mortar typically needs to be designed as a high-viscosity paste (300,000-600,000 mPa•s) with a low water-cement ratio. This leads to problems such as excessively rapid drying, short workability, and poor workability. This invention utilizes modified polyacrylate water-absorbing resin to release water, allowing the mortar to maintain a longer initial setting time, thus ensuring sufficient workability and excellent workability. Furthermore, this invention uses 120-180 mesh hollow glass microspheres, 50-70 mesh vitrified microspheres, and 12-16 mesh polystyrene particles with a specific particle size distribution as lightweight aggregate components. This imparts low elastic modulus and high toughness to the mortar, improving its flexibility (lateral deformation capacity). This helps buffer deformation caused by temperature stress changes and external forces, ensuring a continuous seal between the mortar and the frame / wall, preventing cracking.Thus, through the synergistic effect of the dual micro-expansion compensation of the dry powder shrinkage compensator and the flexibility of the lightweight aggregate, the drying shrinkage stress generated during the plastic stage and hardening process of the joint mortar can be fully offset and compensated, avoiding cracks caused by shrinkage between the door / window frame and the wall, significantly improving the durability of the joint mortar. At the same time, due to the synergistic effect of micro-expansion and flexibility, the expansion filling is more complete, sealing the capillary channels, which is conducive to improving the waterproof and seepage-proof performance of the joint mortar, effectively preventing rainwater and moisture penetration, and preventing problems such as wall hollowing, mold, and window frame corrosion.

[0010] In a preferred embodiment, the manufactured granite sand used as heavy aggregate is manufactured granite sand with specific particle size distributions of 30-60 mesh, 60-80 mesh, and 80-120 mesh. This further enhances the mechanical interlocking between the grout and the lightweight aggregate, increases the mechanical interlocking force between them, thereby improving the compressive and flexural strength of the grout, enabling it to better withstand the self-weight of the door / window frame after installation and external loads (wind pressure), reducing the risk of deformation or cracking due to pressure, and ensuring high waterproofness, impermeability, and durability. Detailed Implementation

[0011] The embodiments of the present invention are described in detail below. The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. Furthermore, unless otherwise specified, all embodiments and optional embodiments of the present invention can be combined with each other to form new technical solutions, and such technical solutions should be considered to be included in the disclosure of the present invention.

[0012] The anti-seepage window frame mortar provided by this invention comprises the following components in parts by weight: 40-46 parts P·O silicate cement, 4-10 parts heavy calcium carbonate, 10-23 parts lightweight aggregate, 16-28 parts granite manufactured sand, 1.8-2.5 parts microsilica, 2-3.5 parts ethylene tert-carbonate modified latex powder, 3.5-5 parts dry powder shrinkage compensator, 4-7 parts type II ammonium polyphosphate flame retardant, and optional first additive. Specifically, the content of P·O silicate cement can be 40, 41, 42, 43, 44, 45, 46 parts by weight or any value between them. The content of heavy calcium carbonate can be 4, 5, 6, 7, 8, 9, 10 parts by weight or any value between them. The content of lightweight aggregate can be 10, 12, 14, 15, 16, 18, 20, 21, 22, 23 parts by weight or any value between them. The content of the manufactured granite sand can be 15, 17, 19, 20, 21, 22, 24, 25, 26, or 28 parts by weight, or any value between them. The content of the microsilica powder can be 1.8, 1.9, 2, 2.1, 2.2, 2.3, 2.4, or 2.5 parts by weight, or any value between them. The content of the ethylene tert-carbonate modified latex powder can be 2, 2.2, 2.5, 2.8, 3, 3.2, or 3.5 parts by weight, or any value between them. The content of the dry powder shrinkage compensator can be 3.5, 3.8, 4, 4.2, 4.5, 4.8, or 5 parts by weight, or any value between them. The content of the type II ammonium polyphosphate flame retardant can be 4, 5, 6, or 7 parts by weight, or any value between them.

[0013] In this invention, the lightweight aggregate is composed of 120-180 mesh hollow glass microspheres, 50-70 mesh vitrified microspheres, and 12-16 mesh polystyrene particles. The preferred mass ratio of the 120-180 mesh hollow glass microspheres, 50-70 mesh vitrified microspheres, and 12-16 mesh polystyrene particles in the lightweight aggregate is (0.25-1.25):(0.5-2):1. By controlling the mass ratio of the 120-180 mesh hollow glass microspheres, 50-70 mesh vitrified microspheres, and 12-16 mesh polystyrene particles within the above-mentioned preferred range, under the same dry density, the lightweight aggregate compound system with hollow and closed-cell structures of three different materials and specific particle sizes and dosage gradations is beneficial for further enhancing the compressive strength and flexibility of lightweight mortar and reducing the mortar drying shrinkage rate. The reasons are as follows: Polystyrene particles mainly serve as a low thermal conductivity skeleton, and at the same time, polystyrene particles are a highly elastic phase, which can reduce the overall elastic modulus of the mortar, effectively absorb the deformation stress caused by drying shrinkage and temperature changes, reduce the generation of bridging microcracks and prevent their propagation, thus overcoming the problems of high brittleness and easy cracking of pure inorganic lightweight mortar; the surface of vitrified microspheres is a dense vitrified hard shell with a certain structural strength, which can build a rigid skeleton and make up for the lack of strength of pure polystyrene particles; the small-diameter hollow glass microspheres are inorganic spherical rigid particles, and their spherical "ball effect" can further fill and refine the pores between polystyrene particles and vitrified microspheres, forming a three-level close packing, reducing pore connectivity and building mortar thermal resistance, which can effectively transfer stress and block convective heat transfer, thereby enhancing the mortar system's resistance to lateral deformation (flexibility).

[0014] Specifically, taking 12-16 mesh polystyrene particles as 1 part by weight, the content of 120-180 mesh hollow glass microspheres is 0.25-1.25 parts by weight, for example, 0.25, 0.5, 0.75, 1, 1.25 parts by weight or any value between them; the content of 50-70 mesh vitrified microspheres is 0.5-2 parts by weight, for example, 0.5, 0.75, 1, 1.25, 1.5, 1.75, 2 parts by weight or any value between them. The particle size of the hollow glass microspheres can be 120 mesh, 130 mesh, 140 mesh, 150 mesh, 160 mesh, 170 mesh, 180 mesh or any value or range between them. The particle size of the vitrified microspheres can be 50 mesh, 55 mesh, 60 mesh, 65 mesh, 70 mesh or any value or range between them. The particle size of the polystyrene particles can be 12 mesh, 13 mesh, 14 mesh, 15 mesh, 16 mesh, or any value or range thereof.

[0015] More specifically, the lightweight aggregate may consist of 2-5 parts by weight of 120-180 mesh hollow glass microspheres, 4-8 parts by weight of 50-70 mesh vitrified microspheres, and 4-8 parts by weight of 12-16 mesh polystyrene particles. More specifically, the content of 120-180 mesh hollow glass microspheres may be 2, 3, 4, or 5 parts by weight or any value between them; the content of 50-70 mesh vitrified microspheres may be 4, 5, 6, 7, or 8 parts by weight or any value between them; and the content of 12-16 mesh polystyrene particles may be 4, 5, 6, 7, or 8 parts by weight or any value between them.

[0016] Specifically, the hollow glass microspheres can be soda lime borosilicate glass microspheres.

[0017] In this invention, the dry powder shrinkage compensator comprises the following components in parts by weight: 35-50 parts high-alumina cement, 6-23 parts anhydrite powder, 11-25 parts P·I silicate cement, 4-10 parts quicklime powder, 1-1.6 parts alkaline activator, 5-20 parts slag powder, 0.5-1 part azodicarbonamide powder, 0.25-0.5 parts triglyceride monostearate powder, 0.5-1 part modified polyacrylamide superabsorbent resin, and an optional second additive. Specifically, the content of the high-alumina cement can be 35, 38, 40, 42, 45, 48, 50 parts by weight or any value between them. The content of the anhydrite powder can be 6, 8, 10, 12, 15, 18, 20, 23 parts by weight or any value between them. The content of the P·I silicate cement can be 11, 12, 15, 18, 20, 22, 25 parts by weight or any value between them. The content of quicklime powder can be 4, 5, 6, 7, 8, 9, 10 parts by weight or any value between them. The content of alkaline activator can be 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6 parts by weight or any value between them. The content of slag powder can be 5, 8, 10, 12, 15, 18, 20 parts by weight or any value between them. The content of azodicarbonamide powder can be 0.5, 0.6, 0.7, 0.8, 0.9, 1 part by weight or any value between them. The content of triglyceride monostearate powder can be 0.25, 0.3, 0.35, 0.4, 0.45, 0.5 parts by weight or any value between them. The content of modified polyacrylate superabsorbent resin can be 0.5, 0.6, 0.7, 0.8, 0.9, 1 part by weight or any value between them.

[0018] In this invention, the strength of the P·O silicate cement can be 42.5R or higher.

[0019] In this invention, the particle size of the superphosphate is preferably 300-500 mesh, for example 300 mesh, 350 mesh, 400 mesh, 450 mesh, 500 mesh or any value between them.

[0020] In this invention, the manufactured granite sand preferably includes 30-60 mesh manufactured granite sand, 60-80 mesh manufactured granite sand, and 80-120 mesh manufactured granite sand.

[0021] Further, the preferred mass ratio of the 30-60 mesh granite manufactured sand, the 60-80 mesh granite manufactured sand, and the 80-120 mesh granite manufactured sand is 1:(0.6-1.6):(0.75-2.4). Taking 30-60 mesh granite manufactured sand as one part by weight, the content of 60-80 mesh granite manufactured sand is preferably 0.6-1.6 parts by weight, for example, 0.6, 0.8, 1, 1.2, 1.4, 1.6 parts by weight or any value between them; the content of 80-120 mesh granite manufactured sand is preferably 0.75-2.4 parts by weight, for example, 0.75, 1, 1.2, 1.5, 1.8, 2, 2.2, 2.4 parts by weight or any value between them.

[0022] Specifically, the manufactured granite sand may include 5-8 parts by weight of 30-60 mesh manufactured granite sand, 5-8 parts by weight of 60-80 mesh manufactured granite sand, and 6-12 parts by weight of 80-120 mesh manufactured granite sand. More specifically, the content of 30-60 mesh manufactured granite sand can be any value between 5, 6, 7, and 8 parts by weight; the content of 60-80 mesh manufactured granite sand can be any value between 5, 6, 7, and 8 parts by weight; and the content of 80-120 mesh manufactured granite sand can be 6, 8, 10, and 12 parts by weight or any value between them.

[0023] In this invention, the average particle size of the microsilica powder is preferably 100~150nm, such as 100nm, 110nm, 120nm, 130nm, 140nm, 150nm or any value between them. This is more conducive to the microsilica powder filling the voids in the hardened body structure with cement hydration products as the skeleton, further compacting the hardened body structure, thereby improving the strength performance of the joint filling mortar.

[0024] Furthermore, the silica content in the microsilica powder is preferably above 92 wt%, for example, the silica content can be 92 wt%, 93 wt%, 94 wt%, 95 wt%, 96 wt%, 97 wt%, 98 wt%, 99 wt%, etc. The specific surface area of ​​the microsilica powder is preferably 15~27 m². 2 / g, for example, 15m 2 / g、18m 2 / g、20m2 / g、22m 2 / g、25m 2 / g、27m 2 / g or any value between them. At this time, this highly active and high specific surface area microsilica powder can combine with the free Ca(OH)2 in the mortar to form a stable calcium silicate hydrate: 2CaO·SiO2·H2O, thereby further improving the compressive strength, flexural strength and impermeability of the joint filling mortar.

[0025] In this invention, the introduction of ethylene tert-carbonate modified latex powder is beneficial to improving the waterproof and seepage-resistant properties, bonding strength, and flexibility of the joint-filling mortar. The ethylene tert-carbonate modified latex powder is preferably a copolymer of ethylene tert-carbonate, vinyl acetate, and ethylene. Specifically, the ethylene tert-carbonate modified latex powder is prepared by spray drying of a ethylene tert-carbonate-vinyl acetate-ethylene terpolymer emulsion.

[0026] In this invention, the Type II ammonium polyphosphate flame retardant is a flame-retardant material with an average degree of polymerization ≥1000. Its flame-retardant mechanism lies in its decomposition at temperatures above 280°C, producing phosphoric acid and metaphosphoric acid. This rapidly dehydrates and carbonizes the surface of the polystyrene particles, forming a dense carbonized layer. The carbonized layer expands to form a porous insulating layer, preventing heat transfer to the interior. Simultaneously, the ammonia and water vapor produced by the decomposition of ammonium polyphosphate cause the carbonized layer to expand, further enhancing the insulation effect. It also releases non-combustible gases such as ammonia and water vapor, diluting the oxygen concentration and ensuring the joint mortar meets the A2 grade non-combustible material requirements. This invention selects this specific type of flame retardant material because: firstly, the Type II ammonium polyphosphate flame retardant is highly compatible with the joint mortar system of this invention, having minimal impact on mortar strength; and secondly, the phosphoric acid produced by the high-temperature decomposition of Type II ammonium polyphosphate reacts with Ca(OH)2 produced by the hydration of the joint mortar to form stable calcium phosphate, further improving the strength and density of the carbonized layer, resulting in a superior synergistic flame-retardant mechanism.

[0027] Furthermore, the D50 particle size of the type II ammonium polyphosphate flame retardant is preferably ≤20μm, such as 20μm, 18μm, 15μm, 12μm, 10μm, 8μm, 5μm, etc., which is beneficial to further improve the compatibility with the joint filling mortar system.

[0028] In this invention, there are no particular restrictions on the specific type of the first additive; any conventional additive commonly used in existing mortars to improve performance is acceptable. Preferably, the first additive is any one or more of the following: self-repellent agent, hydroxyethyl methyl cellulose ether, starch ether, and polypropylene fiber.

[0029] In one specific embodiment, the content of the first additive in the anti-seepage window frame grouting mortar can be 0 to 1 parts by weight, for example, 0, 0.1, 0.2, 0.5, 0.8, 1 parts by weight or any value between them. Further, the content of the water-repellent agent can be 0 to 0.5 parts by weight, for example, 0, 0.1, 0.2, 0.3, 0.4, 0.5 parts by weight or any value between them; the content of the hydroxyethyl methyl cellulose ether can be 0 to 0.15 parts by weight, for example, 0, 0.02, 0.05, 0.08, 0.1, 0.12, 0.15 parts by weight or any value between them; the content of the starch ether can be 0 to 0.06 parts by weight, for example, 0, 0.01, 0.02, 0.03, 0.04, 0.05, 0.06 parts by weight or any value between them.

[0030] Specifically, the hydrophobic agent can be a siloxane-based hydrophobic agent, and specific examples include, but are not limited to, any one or more of methyltriethoxysilane, isobutyltriethoxysilane, and n-octyltriethoxysilane.

[0031] Specifically, the viscosity of the hydroxyethyl methyl cellulose ether is preferably 40,000 to 50,000 mPa·s, for example, 40,000, 42,000, 45,000, 48,000, 50,000 mPa·s or any value between them.

[0032] Specifically, the length of the polypropylene fiber is preferably 3 to 5 mm, for example, 3 mm, 4 mm, 5 mm or any value between them.

[0033] In this invention, the particle size of the anhydrite is preferably 100-300 mesh, for example 100 mesh, 150 mesh, 200 mesh, 250 mesh, 300 mesh or any value between them.

[0034] In this invention, the purpose of introducing quicklime powder into the dry powder shrinkage compensator is to provide alkalinity to the system and activate the activity of anhydrite. The particle size of the quicklime powder is preferably 300-400 mesh, for example, 300 mesh, 320 mesh, 350 mesh, 380 mesh, 400 mesh, or any value between them.

[0035] In this invention, the alkaline activator is sodium sulfate and calcium formate. This invention introduces a compound of sodium sulfate and calcium formate as an alkaline activator into the dry powder shrinkage compensator. The advantage lies in that this compound activator combination can simultaneously activate the aluminum and silicon phases in the shrinkage compensator. During the initial plastic stage of the mortar's curing, it assists in the initial formation of ettringite crystal nuclei, providing a growth basis for the later hardening stage where ettringite crystals grow and interlock to produce shrinkage compensation. This helps the dry powder shrinkage compensator achieve a dual micro-expansion compensation effect and helps the slurry quickly build a skeletal structure, contributing to early strength. The reason is that high-alumina cement is a "sulfur-deficient, highly active aluminum source," requiring interaction with SO4. 2- Only through combination can ettringite crystals be formed, but anhydrite powder is an inert sulfur source and cannot provide SO4 in the initial stage. 2- Sodium sulfate is a source of sodium, which can rapidly dissociate into SO4 in water. 2- In an alkaline environment, it reacts with Al in the liquid phase. 3+ Ca 2+ The combination initially generates crystal nuclei that allow for the continued growth of ettringite crystals; calcium formate can, through complexation, enable high-alumina cement to continuously release Al. 3+ Secondly, it can reduce the hydration activation energy of C3S, promote the formation of CSH gel, and the hydration product has a dense structure, which is beneficial to reduce the negative impact of excessive expansion of ettringite on the strength in the later stage of 28 days.

[0036] Furthermore, the preferred mass ratio of sodium sulfate to calcium formate in the alkaline activator is (1~3):1, for example, 1:1, 1.5:1, 2:1, 2.5:1, 3:1, or any ratio between them. This is more conducive to ensuring the ratio of sodium sulfate to high-alumina cement is matched, promoting the initial crystallization of ettringite nuclei, and better stabilizing the expansion, thus ensuring the strength performance of the mortar.

[0037] In this invention, the slag powder is a powder containing active SiO2 and Al2O3. These active components can convert excess free calcium hydroxide in the mortar system into stable CSH gel and CAH gel, thereby stabilizing the overall expansion and preventing abnormal expansion of the mortar in the later stages.

[0038] In this invention, the second auxiliary agent is preferably a powder dispersant and / or an anti-caking agent. The powder dispersant can be any conventional choice in the art, preferably a naphthalene sulfonate dispersant. The anti-caking agent can be any conventional choice in the art, preferably silica.

[0039] In one specific embodiment, the content of the second auxiliary agent in the dry powder shrinkage compensator can be 0 to 5.4 parts by weight, for example, 0, 1, 2, 3, 4, 5, 5.4 parts by weight or any value between them. Further, the content of the powder dispersant can be 0 to 5 parts by weight, for example, 0, 1, 2, 3, 4, 5 parts by weight or any value between them; the content of the anti-caking agent can be 0 to 0.4 parts by weight, for example, 0, 0.1, 0.2, 0.3, 0.4 parts by weight or any value between them.

[0040] In this invention, the preferred method for preparing the dry powder shrinkage compensator is as follows: 35-50 parts by weight of high-alumina cement, 6-23 parts by weight of anhydrite powder, 11-25 parts by weight of P·I silicate cement, 4-10 parts by weight of quicklime powder, 1-1.6 parts by weight of alkaline activator, 5-20 parts by weight of slag powder, 0.5-1 parts by weight of azodicarbonamide powder, 0.25-0.5 parts by weight of triglyceride monostearate powder, 0.5-1 parts by weight of modified polyacrylate superabsorbent resin, and optional second additives are weighed and subjected to a first mixing treatment. The resulting mixture is the dry powder shrinkage compensator.

[0041] Furthermore, the first mixing process preferably includes a mixing section I and a mixing section II performed sequentially, wherein the processing speed of the mixing section I is lower than the processing speed of the mixing section II.

[0042] Furthermore, the processing speed of the mixing section I is preferably 20~40 r / min, for example 20 r / min, 25 r / min, 30 r / min, 35 r / min, 40 r / min or any value between them; the processing time of the mixing section I is preferably 15~30 s, for example 15 s, 20 s, 25 s, 30 s or any value between them. The processing speed of the mixing section II is preferably 150~250 r / min, for example 150 r / min, 180 r / min, 200 r / min, 220 r / min, 250 r / min or any value between them; the processing time of the mixing section II is preferably 180~300 s, for example 180 s, 200 s, 220 s, 240 s, 260 s, 280 s, 300 s or any value between them.

[0043] The preparation method of the above-mentioned anti-seepage window frame grouting mortar provided by the present invention includes: weighing 40-46 parts of P·O silicate cement, 4-10 parts of heavy calcium carbonate, 10-23 parts of lightweight aggregate, 16-28 parts of granite manufactured sand, 1.8-2.5 parts of microsilica, 2-3.5 parts of ethylene tert-carbonate modified latex powder, 3.5-5 parts of dry powder shrinkage compensator, 4-7 parts of type II ammonium polyphosphate flame retardant, and optional first additives, and then performing a second mixing treatment. The resulting mixture is the anti-seepage window frame grouting mortar.

[0044] Furthermore, the second mixing process preferably includes mixing section III and mixing section IV performed sequentially, wherein the processing speed of mixing section III is lower than the processing speed of mixing section IV.

[0045] Furthermore, the processing speed of the mixing section III is preferably 40~100 r / min, for example 40 r / min, 60 r / min, 80 r / min, 100 r / min or any value between them; the processing time of the mixing section III is preferably 15~60 s, for example 15 s, 20 s, 25 s, 30 s, 35 s, 40 s, 45 s, 50 s, 55 s, 60 s or any value between them. The processing speed of the mixing section IV is preferably 800~1000 r / min, for example 800 r / min, 850 r / min, 900 r / min, 950 r / min, 1000 r / min or any value between them; the processing time of the mixing section IV is preferably 180~260 s, for example 180 s, 200 s, 220 s, 240 s, 260 s or any value between them.

[0046] The present invention will be described in detail below through specific embodiments. These embodiments are intended to explain the invention and should not be construed as limiting it. Where specific techniques or conditions are not specified in the embodiments, they are performed according to the techniques or conditions described in the literature in the art or according to the product instructions. Reagents or instruments whose manufacturers are not specified are all conventional products that can be obtained commercially.

[0047] The sources of some raw materials in the following preparation examples and embodiments are as follows: high-alumina cement, purchased from Kerneos Ternal CC; P·I silicate cement, purchased from Anhui Conch Cement Co., Ltd., P·I 52.5 grade product; naphthalene sulfonate dispersant, purchased from Auhanshengchuan Chemical (Beijing) Co., Ltd., ALLPON® P535; slag powder, purchased from Chongqing Xiangzhong Renewable Resources Co., Ltd., S105 grade slag powder; modified polyacrylate superabsorbent polymer, purchased from BASF, S2100F. Ordinary silicate 42.5R grey cement, purchased from Anhui Conch Cement Co., Ltd., grade PO 42.5R; 120-180 mesh hollow glass microspheres, purchased from Zhengzhou Shenglait Hollow Microsphere New Material Co., Ltd., grade HL15; 50-70 mesh vitrified microspheres, purchased from Xinyang Zhongke Mining Co., Ltd., grade 50-70 mesh; 12-16 mesh polystyrene particles, purchased from Jiangsu Hongxin Building Materials Technology Development Co., Ltd.; manufactured granite sand, purchased from Huizhou Jiyu Environmental Protection Building Materials Technology Co., Ltd.; microsilica powder, purchased from Gansu Sanyuan Microsilica Powder Co., Ltd., grade SF92; ethylene tert-carbonate modified redispersible latex powder, purchased from Hebei Siyou Guoyun Technology Development Co., Ltd., grade 8031H; hydroxyethyl methyl cellulose ether, purchased from Northern Tianpu Cellulose Co., Ltd., grade MH2015P; siloxane hydrophobic agent, purchased from Celanese's brand: ELOTEX, grade ELOTEX. SEAL80; Hydroxypropyl starch ether, purchased from Avibe Company, model CMT; Polypropylene fiber, purchased from Shandong Senhong Engineering Materials Co., Ltd., product with a diameter of 3~5mm; Type II ammonium polyphosphate flame retardant, purchased from Aohanshengchuan Chemical (Beijing) Co., Ltd., model P42C.

[0048] Preparation Example 1 This preparation example illustrates the preparation of a dry powder shrinkage compensator, as detailed below: By weight, the following ingredients are added sequentially to the mixing chamber of the high-speed dry mortar mixer: 35 parts high-alumina cement, 6.9 parts 200-mesh anhydrite powder, 23 parts P·I silicate cement, 10 parts 325-mesh quicklime powder, 1 part alkaline activator (sodium sulfate to calcium formate mass ratio of 1:1), 2 parts naphthalene sulfonate dispersant, 20 parts slag powder, 1 part azodicarbonamide powder, 0.5 parts triglyceride monostearate powder, 0.5 parts modified polyacrylate superabsorbent resin, and 0.1 parts silica anti-caking agent. After all materials are put into the mixer, the discharge gate cylinder is driven by the control system (PLC) to ensure that the discharge gate is completely closed and locked. Then, the mixer is started at low speed, with the speed controlled at 30 r / min. After 30 seconds of premixing at low speed, the mixer speed is steadily increased to 200 r / min and high speed is mixed for 240 seconds until the mixture is uniform. After the mixing is completed, the resulting mixture is the dry powder shrinkage compensator, which is then discharged, packaged, and ready for use.

[0049] Preparation Example 2 This preparation example illustrates the preparation of a dry powder shrinkage compensator, as detailed below: By weight, the following components are added sequentially to the mixing chamber of the high-speed dry mortar mixer: 40 parts high-alumina cement, 10.8 parts 200-mesh hard gypsum powder, 20 parts P·I silicate cement, 8 parts 325-mesh quicklime powder, 1.2 parts alkaline activator (sodium sulfate to calcium formate mass ratio of 2:1), 3 parts naphthalene sulfonate dispersant, 15 parts slag powder, 0.8 parts azodicarbonamide powder, 0.4 parts triglyceride monostearate powder, 0.6 parts modified polyacrylate superabsorbent resin, and 0.2 parts silica anti-caking agent. After all materials are put into the mixer, the discharge gate cylinder is first driven by the control system (PLC) to ensure that the discharge gate is completely closed and locked. Then, the mixer is started at low speed, with the speed controlled at 40 r / min. Premix for 15 seconds. After the low-speed premixing time is completed, the mixer speed is steadily increased to 250 r / min and high-speed mixing is carried out for 180 seconds until the mixture is uniform. After the mixing is completed, the resulting mixture is the dry powder shrinkage compensator, which is discharged and packaged for later use.

[0050] Preparation Example 3 This preparation example illustrates the preparation of a dry powder shrinkage compensator, as detailed below: By weight, the following components are added sequentially to the mixing chamber of the high-speed dry mortar mixer: 45 parts high-alumina cement, 15.6 parts 200-mesh anhydrite powder, 16 parts P·I silicate cement, 6 parts 325-mesh quicklime powder, 1.4 parts alkaline activator (sodium sulfate to calcium formate mass ratio of 3:1), 4 parts naphthalene sulfonate dispersant, 10 parts slag powder, 0.6 parts azodicarbonamide powder, 0.3 parts triglyceride monostearate powder, 0.8 parts modified polyacrylate superabsorbent resin, and 0.3 parts silica anti-caking agent. After all materials are put into the mixer, the discharge gate cylinder is first driven by the control system (PLC) to ensure that the discharge gate is completely closed and locked. Then, the mixer is started at low speed, with the speed controlled at 20 r / min. Premix for 30 seconds. After the low-speed premixing time is completed, the mixer speed is steadily increased to 150 r / min and high-speed mixing is carried out for 300 seconds until the mixture is uniform. After the mixing is completed, the resulting mixture is the dry powder shrinkage compensator, which is discharged and packaged for later use.

[0051] Preparation Example 4 This preparation example illustrates the preparation of a dry powder shrinkage compensator, as detailed below: By weight, the following components are added sequentially to the mixing chamber of the high-speed dry mortar mixer: 50 parts high-alumina cement, 21.25 parts 200-mesh anhydrite powder, 11 parts P·I silicate cement, 4 parts 325-mesh quicklime powder, 1.6 parts alkaline activator (sodium sulfate to calcium formate mass ratio of 2:1), 5 parts naphthalene sulfonate dispersant, 5 parts slag powder, 0.5 parts azodicarbonamide powder, 0.25 parts triglyceride monostearate powder, 1.0 part modified polyacrylate superabsorbent resin, and 0.4 parts silica anti-caking agent. After all materials are put into the mixer, the control system (PLC) first drives the discharge gate cylinder to ensure that the discharge gate is completely closed and locked. Then, the mixer is started at low speed, with the speed controlled at 30 r / min. Premix for 30 seconds. After the low-speed premixing time is completed, the mixer speed is steadily increased to 200 r / min and high-speed mixing is carried out for 240 seconds until the mixture is uniform. After the mixing is completed, the resulting mixture is the dry powder shrinkage compensator, which is discharged and packaged for later use.

[0052] Comparative Preparation Example 1 This comparative preparation example illustrates the preparation of a reference dry powder shrinkage compensator, as detailed below: The dry powder shrinkage compensator was prepared according to the method of Preparation Example 1, except that the same weight of silica anti-caking agent was used instead of modified polyacrylate water-absorbing resin, and all other conditions were the same as in Preparation Example 1, thereby obtaining a reference dry powder shrinkage compensator.

[0053] Comparative Preparation Example 2 This comparative preparation example illustrates the preparation of a reference dry powder shrinkage compensator, as detailed below: The dry powder shrinkage compensator was prepared according to the method of Preparation Example 1, except that lithium carbonate of the same weight was used instead of sodium sulfate and calcium formate in a mass ratio of 1:1 as the alkaline activator, and all other conditions were the same as in Preparation Example 1. Thus, a reference dry powder shrinkage compensator was prepared.

[0054] Example 1 This embodiment illustrates the preparation of a window frame grouting mortar, as detailed below: By weight, the following components were added sequentially to the mixing chamber of the integrated dry mortar production equipment: 40 parts of ordinary silicate 42.5R grey cement, 10.0 parts of 400-mesh heavy calcium carbonate, 5.0 parts of 120-180-mesh hollow glass microspheres, 8.0 parts of 50-70-mesh vitrified microspheres, 4.0 parts of 12-16-mesh polystyrene particles, 5.0 parts of 30-60-mesh granite manufactured sand, 8.0 parts of 60-80-mesh granite manufactured sand, 6.13 parts of 80-120-mesh granite manufactured sand, 2.5 parts of silica fume, 3.5 parts of ethylene tert-carbonate modified redispersible latex powder, 0.08 parts of hydroxyethyl methyl cellulose ether, 3.5 parts of shrinkage compensator from Preparation Example 1, 0.2 parts of siloxane hydrophobic agent, 0.03 parts of hydroxypropyl starch ether, 0.06 parts of polypropylene fiber, and 4 parts of type II ammonium polyphosphate flame retardant. After the material is added, it is first stirred at a low speed of 70r / min for 30s, and then stirred at a high speed of 900r / min for 240s. After the stirring is completed, the material is discharged and packaged to obtain the anti-seepage window frame filling mortar.

[0055] Example 2 This embodiment illustrates the preparation of a window frame grouting mortar, as detailed below: By weight, the following components were added sequentially to the mixing chamber of the integrated production equipment: 42.0 parts of ordinary silicate 42.5R grey cement, 8.0 parts of 300-mesh heavy calcium carbonate, 4.0 parts of 120-180-mesh hollow glass microspheres, 7.0 parts of 50-70-mesh vitrified microspheres, 5.0 parts of 12-16-mesh polystyrene particles, 6.0 parts of 30-60-mesh granite manufactured sand, 7.0 parts of 60-80-mesh granite manufactured sand, 6.28 parts of 80-120-mesh granite manufactured sand, 2.2 parts of silica fume, 3.0 parts of ethylene tert-carbonate modified redispersible latex powder, 0.10 parts of hydroxyethyl methyl cellulose ether, 4.0 parts of shrinkage compensator from Preparation Example 2, 0.3 parts of siloxane hydrophobic agent, 0.04 parts of hydroxypropyl starch ether, 0.08 parts of polypropylene fiber, and 5 parts of type II ammonium polyphosphate flame retardant. After the material is added, stir at a low speed of 40-100 r / min for 30 seconds, then stir at a high speed of 800-1000 r / min for 180-260 seconds. After stirring, the material is discharged and packaged to obtain the anti-seepage window frame filling mortar.

[0056] Example 3 This embodiment illustrates the preparation of a window frame grouting mortar, as detailed below: By weight, the following components were sequentially added to the mixing chamber of the integrated production equipment: 44.0 parts of ordinary silicate 42.5R grey cement, 6.0 parts of 500-mesh heavy calcium carbonate, 3.0 parts of 120-180-mesh hollow glass microspheres, 6.0 parts of 50-70-mesh vitrified microspheres, 6.0 parts of 12-16-mesh polystyrene particles, 7.0 parts of 30-60-mesh granite manufactured sand, 6.0 parts of 60-80-mesh granite manufactured sand, 6.33 parts of 80-120-mesh granite manufactured sand, 2.0 parts of silica fume, 2.5 parts of ethylene tert-carbonate modified redispersible latex powder, 0.12 parts of hydroxyethyl methyl cellulose ether, 4.5 parts of shrinkage compensator from Preparation Example 3, 0.4 parts of siloxane hydrophobic agent, 0.05 parts of hydroxypropyl starch ether, 0.10 parts of polypropylene fiber, and 6 parts of type II ammonium polyphosphate flame retardant. After the material is added, stir at a low speed of 40-100 r / min for 30 seconds, then stir at a high speed of 800-1000 r / min for 180-260 seconds. After stirring, the material is discharged and packaged to obtain the anti-seepage window frame filling mortar.

[0057] Example 4 This embodiment illustrates the preparation of a window frame grouting mortar, as detailed below: By weight, the following components were sequentially added to the mixing chamber of the integrated production equipment: 46.0 parts of ordinary silicate 42.5R grey cement, 4.0 parts of 400-mesh heavy calcium carbonate, 2.0 parts of 120-180-mesh hollow glass microspheres, 4.0 parts of 50-70-mesh vitrified microspheres, 8.0 parts of 12-16-mesh polystyrene particles, 8.0 parts of 30-60-mesh granite manufactured sand, 5.0 parts of 60-80-mesh granite manufactured sand, 6.37 parts of 80-120-mesh granite manufactured sand, 1.8 parts of silica fume, 2.0 parts of ethylene tert-carbonate modified redispersible latex powder, 0.15 parts of hydroxyethyl methyl cellulose ether, 5.0 parts of shrinkage compensator from Preparation Example 4, 0.5 parts of siloxane hydrophobic agent, 0.06 parts of hydroxypropyl starch ether, 0.12 parts of polypropylene fiber, and 7 parts of type II ammonium polyphosphate flame retardant. After the material is added, stir at a low speed of 40-100 r / min for 30 seconds, then stir at a high speed of 800-1000 r / min for 180-260 seconds. After stirring, the material is discharged and packaged to obtain the anti-seepage window frame filling mortar.

[0058] Comparative Example 1 This comparative example illustrates the preparation of a reference window frame grouting mortar, as follows: The joint-filling mortar was prepared according to the method of Example 2, except that 2-5 parts by weight of 120-180 mesh hollow glass microspheres, 4-8 parts by weight of 50-70 mesh vitrified microspheres, and 4-8 parts by weight of 12-16 mesh polystyrene particles were replaced with the same weight parts of 80-120 mesh granite manufactured sand, 60-80 mesh granite manufactured sand, and 30-60 mesh granite manufactured sand, respectively. All other conditions were the same as in Example 2, and a reference window frame joint-filling mortar was thus prepared.

[0059] Comparative Example 2 This comparative example illustrates the preparation of a reference window frame grouting mortar, as follows: The mortar was prepared according to the method of Example 3, except that the same weight of commercially available ordinary VAE redispersible latex powder (purchased from Wacker Chemie, model 5010N) was used instead of ethylene tert-carbonate modified redispersible latex powder. All other conditions were the same as in Example 3, and a reference window frame mortar was thus prepared.

[0060] Comparative Example 3 This comparative example illustrates the preparation of a reference window frame grouting mortar, as follows: The grouting mortar was prepared according to the method of Example 4, except that the same weight of 400-mesh heavy calcium carbonate was used instead of the shrinkage compensator from Preparation Example 4, and all other conditions were the same as in Example 4, thereby preparing a reference window frame grouting mortar.

[0061] Comparative Example 4 This comparative example illustrates the preparation of a reference window frame grouting mortar, as follows: The grouting mortar was prepared according to the method of Example 1, except that the same weight parts of the reference dry powder shrinkage compensator (without modified polyacrylate water-absorbing resin) from Comparative Example 1 were used instead of the dry powder shrinkage compensator from Example 1. All other conditions were the same as in Example 1, thereby preparing the reference window frame grouting mortar.

[0062] Comparative Example 5 This comparative example illustrates the preparation of a reference window frame grouting mortar, as follows: The grouting mortar was prepared according to the method of Example 1, except that the same weight parts of the reference dry powder shrinkage compensator from Comparative Example 2 were used instead of the dry powder shrinkage compensator from Example 1, and all other conditions were the same as in Example 1, thereby preparing the reference window frame grouting mortar.

[0063] Comparative Example 6 This comparative example illustrates the preparation of a reference window frame grouting mortar, as follows: The grouting mortar was prepared according to the method of Example 1, except that the same weight of 400-mesh heavy calcium carbonate was used instead of type II ammonium polyphosphate flame retardant, and all other conditions were the same as in Example 1, thereby preparing a reference window frame grouting mortar.

[0064] Test case The window frame mortar prepared in the above embodiments and comparative examples was subjected to the following performance tests, and the test results are shown in Table 1 and Table 2.

[0065] (1) Evaluate the bulk density, dry density and thermal conductivity of window frame mortar according to the C type of JG / T521-2017 Lightweight Mortar.

[0066] (2) Evaluate the compressive strength, flexural strength, compression-flexural ratio, tensile bond strength and drying shrinkage of window frame grouting mortar according to the technical requirements of ordinary flexible repair mortar in JC / T2381-2016 Repair Mortar.

[0067] (3) Evaluate the setting time, seepage pressure, flexibility (lateral deformation capacity) and water absorption rate of the window frame grouting mortar according to the technical requirements of Type I in JC / T984-2011 "Polymer Cement Waterproof Mortar".

[0068] (4) The combustion performance of the window frame mortar shall be evaluated in accordance with the provisions of Class A2 in GB 8624-2025 Classification of Combustion Performance of Building Materials and Products.

[0069] Table 1

[0070] Table 2

[0071] As shown in Table 1, compared to the comparative examples, the window frame mortars provided in Examples 1-4 of this invention possess the characteristics of low drying shrinkage, high flexibility, high impermeability, and low water absorption, while also exhibiting high compressive strength, flexural strength, and tensile bond strength. A comparison of Example 2 and Comparative Example 1 reveals that Example 2, which uses specific lightweight aggregates, has lower bulk density and dry density, as well as higher impermeability, flexibility, and lower water absorption. Although the compressive strength, flexural strength, and tensile bond strength are somewhat reduced, they are still far above the required technical specifications. A comparison of Example 3 and Comparative Example 2 shows that Example 3, which uses ethylene tert-carbonate modified redispersible latex powder, exhibits better tensile bond strength, higher impermeability, flexibility, and lower water absorption. A comparison of Example 4 and Comparative Example 3 shows that Comparative Example 3, which did not use a shrinkage compensator, had significantly higher shrinkage and water absorption rates than Example 4. Its flexibility was lower than Example 4, its impermeability pressure was significantly lower than Example 4, and its compressive strength, flexural strength, and tensile bond strength were comparable to or slightly lower than Example 4. A comparison of Example 1 and Comparative Example 4 shows that when modified polyacrylate superabsorbent resin was not used in the dry powder shrinkage compensator, the setting time of Comparative Example 4 was significantly reduced, and its initial setting time did not meet the technical requirements. Simultaneously, the shrinkage and water absorption rates increased, while the impermeability pressure, flexural strength, compressive strength, and tensile bond strength all decreased. A comparison of Example 1 and Comparative Example 5 shows that when lithium carbonate was used as an activator in the dry powder shrinkage compensator, the setting time of Comparative Example 5 decreased, the shrinkage and water absorption rates were significantly increased compared to Example 1, and the impermeability pressure, flexural strength, and compressive strength all decreased.

[0072] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A type of waterproof window frame grouting mortar, characterized in that, The anti-seepage window frame grouting mortar comprises the following components by weight: 40-46 parts P·O silicate cement, 4-10 parts heavy calcium carbonate, 10-23 parts lightweight aggregate, 16-28 parts granite manufactured sand, 1.8-2.5 parts microsilica, 2-3.5 parts ethylene tert-carbonate modified latex powder, 3.5-5 parts dry powder shrinkage compensator, 4-7 parts type II ammonium polyphosphate flame retardant, and optional first additive; the lightweight aggregate consists of 120-180 mesh hollow glass microspheres, 50-70 mesh vitrified microspheres, and 12-16 mesh... The dry powder shrinkage compensator comprises the following components by weight: 35-50 parts high-alumina cement, 6-23 parts anhydrite powder, 11-25 parts P·I silicate cement, 4-10 parts quicklime powder, 1-1.6 parts alkaline activator, 5-20 parts slag powder, 0.5-1 part azodicarbonamide powder, 0.25-0.5 parts triglyceride monostearate powder, 0.5-1 part modified polyacrylamide superabsorbent resin, and an optional second additive; the alkaline activator is sodium sulfate and calcium formate.

2. The anti-seepage window frame grouting mortar according to claim 1, characterized in that, The strength of the P·O silicate cement is 42.5R or higher; Preferably, the particle size of the heavy calcium carbonate is 300-500 mesh.

3. The anti-seepage window frame grouting mortar according to claim 1, characterized in that, The mass ratio of 120-180 mesh hollow glass microspheres, 50-70 mesh vitrified microspheres and 12-16 mesh polystyrene particles in the lightweight aggregate is (0.25-1.25):(0.5-2):1; Preferably, the lightweight aggregate consists of 2-5 parts by weight of 120-180 mesh hollow glass microspheres, 4-8 parts by weight of 50-70 mesh vitrified microspheres, and 4-8 parts by weight of 12-16 mesh polystyrene particles.

4. The anti-seepage window frame grouting mortar according to claim 1, characterized in that, The manufactured granite sand includes 30-60 mesh manufactured granite sand, 60-80 mesh manufactured granite sand and 80-120 mesh manufactured granite sand; Preferably, the mass ratio of the 30-60 mesh granite manufactured sand, the 60-80 mesh granite manufactured sand, and the 80-120 mesh granite manufactured sand is 1:(0.6-1.6):(0.75-2.4). Preferably, the manufactured granite sand comprises 5-8 parts by weight of 30-60 mesh manufactured granite sand, 5-8 parts by weight of 60-80 mesh manufactured granite sand, and 6-12 parts by weight of 80-120 mesh manufactured granite sand.

5. The anti-seepage window frame grouting mortar according to claim 1, characterized in that, The average particle size of the microsilica powder is 100~150nm; Preferably, the tertiary ethylene carbonate modified latex powder is a copolymer of tertiary ethylene carbonate, vinyl acetate, and ethylene. Preferably, the D50 particle size of the type II ammonium polyphosphate flame retardant is ≤20μm; Preferably, the first additive is selected from at least one of water-repellent agent, hydroxyethyl methyl cellulose ether, starch ether, and polypropylene fiber.

6. The anti-seepage window frame grouting mortar according to claim 1, characterized in that, The particle size of the anhydrite is 100~300 mesh; Preferably, the quicklime powder has a particle size of 300-400 mesh; Preferably, the mass ratio of sodium sulfate to calcium formate in the alkaline activator is (1~3):1; Preferably, the second additive is a powder dispersant and / or an anti-caking agent.

7. The anti-seepage window frame grouting mortar according to claim 1, characterized in that, The preparation method of the dry powder shrinkage compensator is as follows: Weigh out 35-50 parts of high-alumina cement, 6-23 parts of anhydrite powder, 11-25 parts of P·I silicate cement, 4-10 parts of quicklime powder, 1-1.6 parts of alkaline activator, 5-20 parts of slag powder, 0.5-1 parts of azodicarbonamide powder, 0.25-0.5 parts of triglyceride monostearate powder, 0.5-1 parts of modified polyacrylate water-absorbing resin, and optional second additives, and then perform a first mixing treatment. The resulting mixture is the dry powder shrinkage compensator. Preferably, the first mixing process includes a mixing section I and a mixing section II performed sequentially, wherein the processing speed of the mixing section I is lower than the processing speed of the mixing section II; Preferably, the processing speed of the mixing section I is 20~40 r / min, and the processing speed of the mixing section II is 150~250 r / min.

8. The method for preparing the anti-seepage window frame grouting mortar according to any one of claims 1 to 8, characterized in that, The preparation method includes: weighing 40-46 parts of P·O silicate cement, 4-10 parts of heavy calcium carbonate, 10-23 parts of lightweight aggregate, 16-28 parts of granite manufactured sand, 1.8-2.5 parts of microsilica, 2-3.5 parts of ethylene tert-carbonate modified latex powder, 3.5-5 parts of dry powder shrinkage compensator, 4-7 parts of type II ammonium polyphosphate flame retardant, and optional first additives, and then performing a second mixing treatment. The resulting mixture is the anti-seepage window frame grouting mortar.

9. The method for preparing the anti-seepage window frame grouting mortar according to claim 8, characterized in that, The second mixing process includes mixing section III and mixing section IV performed sequentially, wherein the processing speed of mixing section III is lower than that of mixing section IV; Preferably, the processing speed of the mixing section III is 40~100 r / min, and the processing speed of the mixing section IV is 800~1000 r / min.

10. The application of the anti-seepage window frame mortar according to any one of claims 1 to 8 in filling the gap between the door / window frame and the wall.

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