Water-retention thickening high-performance mortar material and preparation process thereof

Abstract

The invention relates to the technical field of preparation of building materials, in particular to a water-retaining and thickening high-performance mortar material and a preparation process thereof. Comprising 250-350 parts of cement, 6-10 parts of sodium hydroxide, 5-10 parts of a polycarboxylate superplasticizer, 4-8 parts of nano-dioxide, 5-15 parts of fly ash, 10-30 parts of bentonite, 5-10 parts of diatomite, 1-5 parts of zeolite, 10-20 parts of montmorillonite, 2-7 parts of modified starch, 30-60 parts of lignosulfonate, 5-15 parts of polyol, 1-3 parts of cellulose ether, 40-70 parts of higher polyol, 35-55 parts of carboxylic acid salt, 20-40 parts of polyoxyethylene, 1-2 parts of short fibers, 10-20 parts of glass beads, 5-15 parts of organosilicon and 50-100 parts of calcium sulfate. According to the high-performance mortar material disclosed by the invention, the contradiction between the water-retaining property and the strength in a traditional mortar material is effectively solved through an elaborately designed component proportion and a preparation process, and the prepared high-performance mortar material not only has excellent water-retaining property, but also ensures the water stability in a construction process; meanwhile, high strength and good cohesiveness are kept.

Description

Technical Field

[0001] The invention relates to the technical field of building material preparation, and in particular to a water-retaining and thickening high-performance mortar material and a preparation process thereof. Background Art

[0002] Masonry and plastering projects are important components of construction projects, and both require cement mortar. General cement mortar is made of cement, lime, sand and water. This type of cement mortar consumes a large amount of lime and the preparation process is cumbersome. The addition of a large amount of lime causes the cement mortar to have poor water reducing properties, long setting time, weak viscosity, environmental pollution and increased costs. Fly ash-added cement mortar has the characteristics of good operability, high bonding strength, water resistance, good frost resistance, etc. It is a new type of building material with superior performance and has gradually attracted people's attention.

[0003] The prior art CN101007720A discloses a highly efficient water-retaining thickening material and a cement mortar prepared therefrom. The composition and proportion (weight percentage) of the water-retaining thickening material are: inorganic composite mineral material: 98-99%, polymer additive 1-2%, and the composition and proportion (weight percentage) of the cement mortar are: cement: 12-34%, highly efficient water-retaining thickening material: 0.5-1.5%, fly ash: 0-13%, sand: 55-74%, water: 10-18%. The present invention utilizes solid waste discharged from power plants, montmorillonite and a variety of polymer additives to prepare a non-lime and non-air-entraining mortar plasticizer, which can replace all lime pastes and be used for building mortar, and can be used in combination with fly ash, greatly reducing the amount of cement used, reducing the land occupied by solid wastes, reducing environmental pollution, saving energy, and providing a new type of building material with low cost for the construction industry.

[0004] Although traditional water-retaining agents can effectively reduce water loss during mortar construction, they often lead to an increase in the actual water-cement ratio, thereby reducing the strength of the mortar and the bonding strength with the substrate. On the contrary, if the water retention is insufficient, the mortar will lose water rapidly during construction, affecting the construction quality and hardening effect. Summary of the invention

[0005] The purpose of the present invention is to provide a water-retaining and thickening high-performance mortar material and a preparation process thereof, so as to solve the problem that although the traditional water-retaining agent in the prior art can effectively reduce the water loss during the mortar construction process, it often leads to an increase in the actual water-cement ratio, thereby reducing the strength of the mortar and the bonding strength with the substrate. On the contrary, if the water retention is insufficient, the mortar will lose water rapidly during construction, affecting the construction quality and hardening effect.

[0006] To achieve the above object, the present invention provides a water-retaining and thickening high-performance mortar material, comprising 250-350 parts of cement, 6-10 parts of sodium hydroxide, 5-10 parts of polycarboxylic acid water-reducing agent, 4-8 parts of nano dioxide, 5-15 parts of fly ash, 10-30 parts of bentonite, 5-10 parts of diatomaceous earth, 1-5 parts of zeolite, 10-20 parts of montmorillonite, 2-7 parts of modified starch, 30-60 parts of lignin sulfonate, 5-15 parts of polyol system, 1-3 parts of cellulose ether, 40-70 parts of high-grade polyol, 35-55 parts of carboxylic acid salt, 20-40 parts of polyoxyethylene, 1-2 parts of short fibers, 10-20 parts of glass microspheres, 5-15 parts of organosilicon, 50-100 parts of calcium sulfate, 20-50 parts of brucite and 200-400 parts of slag sand.

[0007] The present invention also provides a process for preparing a water-retaining and thickening high-performance mortar material, and the process for preparing a water-retaining and thickening high-performance mortar material comprises the following steps:

[0008] Step S1: mixing cement, fly ash, bentonite, diatomaceous earth, zeolite, montmorillonite, calcium sulfate, brucite and slag sand uniformly to form a basic aggregate mixture;

[0009] Step S2: dissolving sodium hydroxide in an appropriate amount of water, adding polycarboxylate water reducer, nano-silica, modified starch, lignin sulfonate, polyol system, cellulose ether, higher polyol, carboxylate salt and polyoxyethylene, stirring evenly to form a modified additive solution;

[0010] Step S3: slowly adding the obtained modified additive solution into the basic aggregate mixture, stirring while adding to ensure uniform mixing;

[0011] Step S4: Add silicone and glass beads and continue stirring until they are completely dispersed;

[0012] Step S5: Finally, short fibers are added and gently stirred to avoid fiber breakage to obtain a uniform high-performance mortar mixture;

[0013] Step S6: The mixture is sent into a mortar mixer for further mixing, and adjusted to a specified construction consistency as required to obtain a water-retaining and thickening high-performance mortar material.

[0014] Wherein, in step S1, the mixing method adopts dry ball milling.

[0015] Wherein, in step S2, during the preparation of the modified additive solution, the solution temperature is controlled at 20-30°C.

[0016] Wherein, in step S3, when adding the modifying additive solution, a spray adding method is adopted.

[0017] Wherein, in step S4, before adding the short fibers, the short fibers are pretreated, including surface activation treatment.

[0018] Wherein, in step S5, the mixing time in the mortar mixer is 10 minutes.

[0019] The preparation process also includes a performance control step, that is, after uniform mixing, an appropriate amount of hardening regulator is added according to specific application requirements to further optimize the water retention, strength and construction performance of the mortar.

[0020] The present invention discloses a water-retaining and thickening high-performance mortar material and a preparation process thereof, comprising 250-350 parts of cement, 6-10 parts of sodium hydroxide, 5-10 parts of polycarboxylic acid water reducer, 4-8 parts of nano dioxide, 5-15 parts of fly ash, 10-30 parts of bentonite, 5-10 parts of diatomaceous earth, 1-5 parts of zeolite, 10-20 parts of montmorillonite, 2-7 parts of modified starch, 30-60 parts of lignin sulfonate, 5-15 parts of polyol system, 1-3 parts of cellulose ether, 40-70 parts of advanced polyol, 35-55 parts of carboxylic acid salt, and 20-40 parts of polyoxyethylene. The present invention comprises the following components: 1 part, 1-2 parts of short fibers, 10-20 parts of vitrified microspheres, 5-15 parts of silicone, 50-100 parts of calcium sulfate, 20-50 parts of brucite and 200-400 parts of slag sand. The present invention effectively solves the contradiction between water retention and strength in traditional mortar materials through carefully designed component ratio and preparation process. The prepared high-performance mortar material not only has excellent water retention performance and ensures moisture stability during construction, but also maintains high strength and good adhesion, significantly improves the construction quality and hardening effect of the mortar, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a flow chart of the steps in Example 1 of the preparation process of the water-retaining and thickening high-performance mortar material provided by the present invention.

[0023] Figure 2 It is a flow chart of the steps in Example 2 of the preparation process of the water-retaining and thickening high-performance mortar material provided by the present invention. DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0025] See also Figure 1-2 The present invention provides a water-retaining and thickening high-performance mortar material, comprising 250-350 parts of cement, 6-10 parts of sodium hydroxide, 5-10 parts of polycarboxylic acid water-reducing agent, 4-8 parts of nano dioxide, 5-15 parts of fly ash, 10-30 parts of bentonite, 5-10 parts of diatomaceous earth, 1-5 parts of zeolite, 10-20 parts of montmorillonite, 2-7 parts of modified starch, 30-60 parts of lignin sulfonate, 5-15 parts of polyol system, 1-3 parts of cellulose ether, 40-70 parts of advanced polyol, 35-55 parts of carboxylic acid salt, 20-40 parts of polyoxyethylene, 1-2 parts of short fiber, 10-20 parts of glass microspheres, 5-15 parts of organosilicon, 50-100 parts of calcium sulfate, 20-50 parts of brucite and 200-400 parts of slag sand.

[0026] The present invention also provides a process for preparing a water-retaining and thickening high-performance mortar material, and the process for preparing a water-retaining and thickening high-performance mortar material comprises the following steps:

[0027] Step S1: mixing cement, fly ash, bentonite, diatomaceous earth, zeolite, montmorillonite, calcium sulfate, brucite and slag sand uniformly to form a basic aggregate mixture;

[0028] Step S2: dissolving sodium hydroxide in an appropriate amount of water, adding polycarboxylate water reducer, nano-silica, modified starch, lignin sulfonate, polyol system, cellulose ether, higher polyol, carboxylate salt and polyoxyethylene, stirring evenly to form a modified additive solution;

[0029] Step S3: slowly adding the obtained modified additive solution into the basic aggregate mixture, stirring while adding to ensure uniform mixing;

[0030] Step S4: Add silicone and glass beads and continue stirring until they are completely dispersed;

[0031] Step S5: Finally, short fibers are added and gently stirred to avoid fiber breakage to obtain a uniform high-performance mortar mixture;

[0032] Step S6: The mixture is sent into a mortar mixer for further mixing, and adjusted to a specified construction consistency as required to obtain a water-retaining and thickening high-performance mortar material.

[0033] In the present invention, the polycarboxylate water-reducing agent can significantly reduce the water-cement ratio of the mortar while maintaining or improving the fluidity of the mortar; nano-silica has an extremely high specific surface area and activity, can fill the tiny pores in the mortar, and improve the density and strength of the mortar; lignin sulfonate has good water retention performance, it can form a protective film in the mortar, slow down the evaporation rate of water, and thus maintain the moisture content of the mortar during the construction process; polyols such as polyols and advanced polyols have hygroscopicity and moisture retention, can absorb and retain moisture in the mortar, and prevent the mortar from losing water too quickly during the construction and hardening process; cellulose ether can significantly improve the water retention and adhesion of the mortar; vitrified microspheres can absorb excess water in the mortar and slowly release it during the hardening process of the mortar, maintain the moisture balance of the mortar, and avoid the problems of construction quality and hardening effect caused by too fast water loss; short fibers can enhance the tensile strength and toughness of the mortar, and prevent cracks caused by water loss during the hardening process of the mortar

[0034] Furthermore, in step S1, the mixing method adopts dry ball milling. By adopting the dry ball milling mixing method, the dispersion and uniformity of each component can be effectively improved, thereby improving the overall performance of the mortar material.

[0035] Furthermore, in step S2, during the preparation of the modified additive solution, the solution temperature is controlled at 20-30°C. By controlling the preparation temperature of the modified additive solution at 20-30°C, it helps the additive to fully dissolve and react, and avoids the adverse effects of high or low temperatures on the performance of the additive.

[0036] Furthermore, in step S3, when adding the modified additive solution, a spray adding method is adopted. By adding the modified additive solution to the basic aggregate mixture by the spray adding method, the droplets can be refined, and the contact area between the additive and the basic aggregate can be increased, thereby promoting more uniform mixing.

[0037] Furthermore, in step S4, before adding the short fibers, the short fibers are pretreated, including surface activation treatment. By pretreating the short fibers, including surface activation treatment, the bonding force between the fibers and the mortar matrix can be enhanced, and the strength and durability of the mortar can be improved.

[0038] Furthermore, in step S5, the mixing time in the mortar mixer is 10 minutes. By setting the mixing time in the mortar mixer to 10 minutes, it is ensured that all components fully react and are evenly dispersed, thereby improving the overall performance and stability of the mortar material.

[0039] Furthermore, the preparation process also includes a performance control step, that is, after uniform mixing, according to specific application requirements, the water retention, strength and construction performance of the mortar are further optimized by adding an appropriate amount of hardening regulator. By adding an appropriate amount of hardening regulator during the preparation process, the water retention, strength and construction performance of the mortar can be further optimized according to specific application requirements, thereby realizing customized production of mortar materials.

[0040] In the preparation process of the present invention, two preparation methods are also provided, which are specifically as follows:

[0041] Embodiment 1:

[0042] The following materials were prepared according to the formula: 300 parts of cement, 8 parts of sodium hydroxide, 7.5 parts of polycarboxylic acid water reducer, 6 parts of nano silicon dioxide, 10 parts of fly ash, 20 parts of bentonite, 7.5 parts of diatomaceous earth, 3 parts of zeolite, 15 parts of montmorillonite, 5 parts of modified starch, 45 parts of lignin sulfonate, 10 parts of polyol system, 2 parts of cellulose ether, 55 parts of higher polyol, 45 parts of carboxylic acid salt, 30 parts of polyoxyethylene, 1.5 parts of short fiber, 15 parts of glass beads, 10 parts of silicone, 75 parts of calcium sulfate, 35 parts of brucite and 300 parts of slag sand.

[0043] The preparation process is as follows:

[0044] First, 300 parts of cement, 10 parts of fly ash, 20 parts of bentonite, 7.5 parts of diatomaceous earth, 3 parts of zeolite, 15 parts of montmorillonite, 75 parts of calcium sulfate, 35 parts of brucite and 300 parts of slag sand were mixed uniformly to obtain a basic aggregate mixture;

[0045] Secondly, 8 parts of sodium hydroxide are dissolved in an appropriate amount of water, and then 7.5 parts of polycarboxylic acid water reducer, 6 parts of nano silicon dioxide, 5 parts of modified starch, 45 parts of lignin sulfonate, 10 parts of polyol system, 2 parts of cellulose ether, 55 parts of advanced polyol, 45 parts of carboxylic acid salt and 30 parts of polyoxyethylene are added, and stirred evenly to form a modified additive solution;

[0046] Simultaneously, slowly add the modified additive solution to the base aggregate mixture, stirring constantly to ensure uniform mixing;

[0047] Also, add 10 parts of silicone and 15 parts of glass microspheres, and continue stirring until they are completely dispersed in the mixture;

[0048] Then, 1.5 parts of short fibers were gently added to avoid fiber breakage, and finally a uniform high-performance mortar mixture was obtained;

[0049] Finally, the mixture is sent to a mortar mixer for further mixing and adjusted to a specified construction consistency as needed to obtain a water-retaining and thickening high-performance mortar material.

[0050] Embodiment 2:

[0051] The materials were prepared according to the following formula: 280 parts of cement, 9 parts of sodium hydroxide, 6 parts of polycarboxylic acid water reducer, 7 parts of nano-silica, 12 parts of fly ash, 25 parts of bentonite, 8 parts of diatomaceous earth, 2 parts of zeolite, 18 parts of montmorillonite, 4 parts of modified starch, 50 parts of lignin sulfonate, 12 parts of polyol system, 2.5 parts of cellulose ether, 60 parts of higher polyol, 48 parts of carboxylic acid salt, 35 parts of polyoxyethylene, 1.8 parts of short fibers, 18 parts of glass beads, 12 parts of silicone, 80 parts of calcium sulfate, 40 parts of brucite and 350 parts of slag sand.

[0052] The preparation steps are as follows:

[0053] First, 280 parts of cement, 12 parts of fly ash, 25 parts of bentonite, 8 parts of diatomaceous earth, 2 parts of zeolite, 18 parts of montmorillonite, 80 parts of calcium sulfate, 40 parts of brucite and 350 parts of slag sand were mixed uniformly to obtain a basic aggregate mixture;

[0054] Secondly, dissolve 9 parts of sodium hydroxide in an appropriate amount of water, and add 6 parts of polycarboxylic acid water reducer, 7 parts of nano silicon dioxide, 4 parts of modified starch, 50 parts of lignin sulfonate, 12 parts of polyol system, 2.5 parts of cellulose ether, 60 parts of advanced polyol, 48 parts of carboxylic acid salt and 35 parts of polyoxyethylene in sequence, and stir evenly to form a modified additive solution;

[0055] At the same time, slowly add the modified additive solution to the base aggregate mixture, stirring constantly to ensure uniform mixing;

[0056] Also, add 12 parts of silicone and 18 parts of glass microspheres, and continue stirring until they are completely dispersed;

[0057] Then, 1.8 parts of short fibers were gently added to avoid fiber damage, and finally a high-performance mortar mixture was obtained;

[0058] Finally, the mixture is sent to a mortar mixer for further mixing, and adjusted to a suitable construction consistency according to actual needs to obtain a water-retaining and thickening high-performance mortar material.

[0059] The water-retaining and thickening high-performance mortar material and its preparation process of the present invention effectively solve the contradiction between water retention and strength in traditional mortar materials through scientific proportioning and fine preparation; the mortar material prepared by the present invention not only has good water retention, but also can maintain or improve the strength and bonding strength of the mortar, and is suitable for various construction engineering applications.

[0060] What is disclosed above is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A water-retaining and thickening high-performance mortar material, characterized in that: It includes 250-350 parts of cement, 6-10 parts of sodium hydroxide, 5-10 parts of polycarboxylic acid water reducer, 4-8 parts of nano dioxide, 5-15 parts of fly ash, 10-30 parts of bentonite, 5-10 parts of diatomaceous earth, 1-5 parts of zeolite, 10-20 parts of montmorillonite, 2-7 parts of modified starch, 30-60 parts of lignin sulfonate, 5-15 parts of polyol system, 1-3 parts of cellulose ether, 40-70 parts of high-grade polyol, 35-55 parts of carboxylic acid salt, 20-40 parts of polyoxyethylene, 1-2 parts of short fibers, 10-20 parts of glass microspheres, 5-15 parts of silicone, 50-100 parts of calcium sulfate, 20-50 parts of brucite and 200-400 parts of slag sand.

2. A process for preparing a water-retaining and thickening high-performance mortar material, applied to the water-retaining and thickening high-performance mortar material as claimed in claim 1, characterized in that: The steps include: Step S1: mixing cement, fly ash, bentonite, diatomaceous earth, zeolite, montmorillonite, calcium sulfate, brucite and slag sand uniformly to form a basic aggregate mixture; Step S2: dissolving sodium hydroxide in an appropriate amount of water, adding polycarboxylate water reducer, nano-silica, modified starch, lignin sulfonate, polyol system, cellulose ether, higher polyol, carboxylate salt and polyoxyethylene, stirring evenly to form a modified additive solution; Step S3: slowly adding the obtained modified additive solution into the basic aggregate mixture, stirring while adding to ensure uniform mixing; Step S4: Add silicone and glass beads and continue stirring until they are completely dispersed; Step S5: Finally, short fibers are added and gently stirred to avoid fiber breakage to obtain a uniform high-performance mortar mixture; Step S6: The mixture is sent into a mortar mixer for further mixing, and adjusted to a specified construction consistency as required to obtain a water-retaining and thickening high-performance mortar material.

3. The process for preparing a water-retaining and thickening high-performance mortar material according to claim 1, characterized in that: In step S1, the mixing method adopts dry ball milling.

4. The process for preparing a water-retaining and thickening high-performance mortar material according to claim 2, characterized in that: In step S2, during the preparation of the modifying additive solution, the solution temperature is controlled at 20-30°C.

5. The process for preparing a water-retaining and thickening high-performance mortar material according to claim 3, characterized in that: In step S3, when adding the modifying additive solution, a spraying addition method is adopted.

6. The process for preparing a water-retaining and thickening high-performance mortar material according to claim 5, characterized in that: In step S4, before adding the short fibers, the short fibers are pretreated, including surface activation treatment.

7. The process for preparing a water-retaining and thickening high-performance mortar material according to claim 5, characterized in that: In step S5, the mixing time in the mortar mixer is 10 minutes.

8. The process for preparing a water-retaining and thickening high-performance mortar material according to claim 6, characterized in that: The preparation process also includes a performance control step, that is, after uniform mixing, the water retention, strength and construction performance of the mortar are further optimized by adding an appropriate amount of hardening regulator according to specific application requirements.

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