CN113024152A - Quick-drying and quick-setting type cement water reducing agent composition - Google Patents
Quick-drying and quick-setting type cement water reducing agent composition Download PDFInfo
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- CN113024152A CN113024152A CN202110359879.9A CN202110359879A CN113024152A CN 113024152 A CN113024152 A CN 113024152A CN 202110359879 A CN202110359879 A CN 202110359879A CN 113024152 A CN113024152 A CN 113024152A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/10—Accelerators; Activators
- C04B2103/12—Set accelerators
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/302—Water reducers
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Abstract
The invention relates to a quick-drying and quick-setting type cement water reducing agent composition. The quick-drying and quick-setting type cement water reducing agent composition is characterized in that: the raw materials consist of the following components: malic acid, sodium chloride, phenolic resin, polypropylene oxide, acrylic acid, hydrogen peroxide, deionized water and sodium hydroxide; wherein the concentration of the hydrogen peroxide is 5-8 mol/L. Wherein, the weight portion of the malic acid is 3 to 6 portions, the sodium chloride is 4 to 8 portions, the phenolic resin is 8 to 15 portions, the polypropylene oxide is 10 to 20 portions, the acrylic acid is 12 to 18 portions, the deionized water is 40 to 60 portions, and the hydrogen peroxide is 5 to 8 mol/L. By adopting the cement water reducing agent composition, the water reducing rate of the water reducing agent can be improved, the fluidity of cement can be improved, the solidification speed of cement paste can be accelerated, and the compressive strength and the flexural strength of the cement can be improved.
Description
Technical Field
The invention relates to a cement water reducing agent composition, in particular to a quick-drying and quick-setting cement water reducing agent composition.
Background
The cement water reducing agent can effectively reduce the water-cement ratio and obviously improve the properties of the cement such as strength and the like. The water reducing agent plays an important role in improving the fluidity of cement, increasing the water reducing rate and the like. The water reducing agent is subjected to the development process of lignosulfonate water reducing agent, naphthalene high-efficiency water reducing agent, melamine high-efficiency water reducing agent and polycarboxylic acid high-efficiency water reducing agent, the performances and the structures of different types of water reducing agents are different, and the improvement on the performance of cement is greatly different. Naphthalene-based superplasticizers, melamine-based superplasticizers and polycarboxylic acid-based superplasticizers are widely applied, but have many problems, such as low water reducing rate, poor fluidity, small influence on cement strength and the like, and the effect of the superplasticizer is difficult to be improved in many aspects. For example, patent document 1 (CN 105967543A) uses a dispersion rubber powder, but it is inferior in fluidity and water-reducing rate. Patent document 2 (CN 104356300A) discloses that the addition of modified chitosan improves water-reducing efficiency, but the improvement of fluidity and cement strength is limited. At present, the water reducing agent needs to be improved to improve the water reducing rate of the water reducing agent, improve the fluidity of cement, accelerate the solidification of cement paste, improve the strength of cement and the like.
Disclosure of Invention
In view of the problems of the prior art, the invention aims to provide a quick-drying and quick-setting type cement water reducing agent composition, which is used for improving the water reducing rate of a water reducing agent, improving the fluidity and the workability of cement, accelerating the setting of cement paste and improving the strength of the cement.
In order to achieve the purpose, the invention adopts the following technical scheme:
a quick-drying and quick-setting type cement water reducing agent composition is characterized in that: the raw materials consist of the following components: malic acid, sodium chloride, phenolic resin, polypropylene oxide, acrylic acid, hydrogen peroxide, deionized water and sodium hydroxide; wherein the concentration of the hydrogen peroxide is 5-8 mol/L.
Wherein, the weight portion of the malic acid is 3 to 6 portions, the sodium chloride is 4 to 8 portions, the phenolic resin is 8 to 15 portions, the polypropylene oxide is 10 to 20 portions, the acrylic acid is 12 to 18 portions, the deionized water is 40 to 60 portions, and the hydrogen peroxide is 5 to 8 mol/L.
Adding malic acid, sodium chloride, phenolic resin, polypropylene oxide, acrylic acid and deionized water into a container, stirring and mixing, heating in a water bath to 50-70 ℃, slowly adding 5-8mol/L hydrogen peroxide, wherein the total adding time of the hydrogen peroxide is 20-40min, and continuously reacting for 30-60min after the hydrogen peroxide is added; and then cooling to room temperature, adding sodium hydroxide with the concentration of 6-8mol/L, and adjusting the pH value to 7.5-8.5 to obtain the quick-drying and quick-setting type cement water reducer composition.
The polypropylene oxide and the acrylic acid are added together, so that the adsorption capacity of the water reducing agent on cement can be improved, the steric hindrance repulsion generated by the water reducing agent is greatly improved, the improvement of the fluidity of the cement is facilitated, and the strength of the cement is improved. When the ratio of polypropylene oxide to acrylic acid is (1-1.2): 1, the cement has good fluidity and strength and high water-reducing rate.
The addition of malic acid and sodium chloride can accelerate the reaction speed of the water reducing agent and gypsum in cement, accelerate the solidification of cement paste and improve the strength of cement. The malic acid and the phenolic resin are beneficial to forming a large amount of carboxyl on the water reducing agent, and the large amount of carboxyl is easy to form calcium-aluminum sulfate minerals at the early stage of cement hydration, so that the solidification of cement paste is accelerated. Malic acid: sodium chloride: when the ratio of the phenolic resin is 1:1:3, the cement setting speed and the cement strength are good, and the water reducing rate is high.
The phenolic resin can better promote the hydrophilic property of polar groups of the water reducing agent, is beneficial to forming a water film on the surface of cement particles, promotes the dispersion of cement, has good lubricating effect on the cement particles, and improves the fluidity and the workability of the cement. When the phenolic resin accounts for 12-14 parts, the fluidity and the workability of the cement are better.
Preferably, the ratio of the malic acid to the sodium chloride to the phenolic resin is 1:1: 3.
Preferably, the ratio of polypropylene oxide to acrylic acid is (1-1.2): 1.
Preferably, the phenolic resin is 12-14 parts.
Preferably, the concentration of the hydrogen peroxide is 6 mol/L.
Preferably, the total adding time of the hydrogen peroxide is 30min, and the reaction is continued for 50min after the hydrogen peroxide is added.
Preferably, sodium hydroxide is added at a concentration of 7mol/L to adjust the pH to 8.
Preferably, the water bath is heated to 65 ℃.
And (3) performance detection: the adopted cement is Portland cement with the strength grade of 42.5, the initial setting is not earlier than 45min, the final setting is not later than 6.5h, the compressive strength of 3d is 17MPa, the flexural strength is 3.5MPa, the compressive strength of 28d is 42.5MPa, and the flexural strength is 6.5 MPa.
The addition amount of the water reducing agent composition is 0.5 percent of the mass of the cement.
The cement added with the water reducing agent composition has the compressive strength of 24.6-28.5MPa after 3d, the breaking strength of 4.6-6.7MPa, the compressive strength of 56.3-63.4MPa after 28d and the breaking strength of 8.4-10.5 MPa. The initial setting time is 55-63min, and the final setting time is 93-112 min.
By referring to the GB/T8077-.
By referring to GB 8076-2008-concrete admixture, the water reducing rate is tested, and the water reducing rate of the concrete admixture is 35.4-39.6%.
The invention has the beneficial effects that:
1. the addition of malic acid and sodium chloride can accelerate the reaction speed of the water reducing agent and gypsum in cement, accelerate the solidification of cement paste and improve the strength of cement. The malic acid and the phenolic resin are beneficial to forming a large amount of carboxyl on the water reducing agent, and the large amount of carboxyl is easy to form calcium-aluminum sulfate minerals at the early stage of cement hydration, so that the solidification of cement paste is accelerated. Malic acid: sodium chloride: when the ratio of the phenolic resin is 1:1:3, the cement setting speed and the cement strength are good, and the water reducing rate is high.
2. The polypropylene oxide and the acrylic acid are added together, so that the adsorption capacity of the water reducing agent on cement can be improved, the steric hindrance repulsion generated by the water reducing agent is greatly improved, the improvement of the fluidity of the cement is facilitated, and the strength of the cement is improved. When the ratio of polypropylene oxide to acrylic acid is (1-1.2): 1, the cement is excellent in fluidity, strength and water-reducing rate.
3. The phenolic resin can better promote the hydrophilic property of polar groups of the water reducing agent, is beneficial to forming a water film on the surface of cement particles, promotes the dispersion of cement, has good lubricating effect on the cement particles, and improves the fluidity and the workability of the cement.
4. By adopting the cement water reducing agent composition, the water reducing rate of the water reducing agent can be improved, the fluidity of cement can be improved, the solidification speed of cement paste can be accelerated under the condition of meeting the requirements, and the compressive strength and the breaking strength of the cement can be improved.
Detailed Description
The present invention will be described in further detail with reference to the following examples. The specific embodiments are to be considered as illustrative and not restrictive in character.
Example 1 a quick-drying and quick-setting type cement water reducing agent composition, characterized in that: the raw materials consist of the following components: malic acid, sodium chloride, phenolic resin, polypropylene oxide, acrylic acid, hydrogen peroxide, deionized water and sodium hydroxide; wherein the concentration of the hydrogen peroxide is 8 mol/L.
The coating comprises, by weight, 3 parts of malic acid, 4 parts of sodium chloride, 15 parts of phenolic resin, 20 parts of polypropylene oxide, 12 parts of acrylic acid, 40 parts of deionized water and 3 parts of 8mol/L hydrogen peroxide.
Adding malic acid, sodium chloride, phenolic resin, polypropylene oxide, acrylic acid and deionized water into a container, stirring and mixing, heating in a water bath to 50 ℃, slowly adding 8mol/L hydrogen peroxide, wherein the total adding time of the hydrogen peroxide is 20min, and continuously reacting for 60min after the hydrogen peroxide is added; and then cooling to room temperature, adding sodium hydroxide with the concentration of 6mol/L, and adjusting the pH value to 7.5 to obtain the quick-drying and quick-setting type cement water reducer composition.
Example 2, a quick-drying and quick-setting type cement water reducing agent composition, characterized in that: the raw materials consist of the following components: malic acid, sodium chloride, phenolic resin, polypropylene oxide, acrylic acid, hydrogen peroxide, deionized water and sodium hydroxide; wherein the concentration of the hydrogen peroxide is 5 mol/L.
The coating comprises, by weight, 6 parts of malic acid, 8 parts of sodium chloride, 8 parts of phenolic resin, 10 parts of polypropylene oxide, 18 parts of acrylic acid, 60 parts of deionized water and 6 parts of 5mol/L hydrogen peroxide.
Adding malic acid, sodium chloride, phenolic resin, polypropylene oxide, acrylic acid and deionized water into a container, stirring and mixing, heating in a water bath to 70 ℃, slowly adding 5mol/L hydrogen peroxide, wherein the total adding time of the hydrogen peroxide is 40min, and continuously reacting for 30min after the hydrogen peroxide is added; and then cooling to room temperature, adding sodium hydroxide with the concentration of 8mol/L, and adjusting the pH value to 8.5 to obtain the quick-drying and quick-setting type cement water reducer composition.
Example 3, a quick-drying and quick-setting type cement water reducing agent composition, characterized in that: the raw materials consist of the following components: malic acid, sodium chloride, phenolic resin, polypropylene oxide, acrylic acid, hydrogen peroxide, deionized water and sodium hydroxide; wherein the concentration of the hydrogen peroxide is 6 mol/L.
The coating comprises, by weight, 5 parts of malic acid, 6 parts of sodium chloride, 10 parts of phenolic resin, 15 parts of polypropylene oxide, 16 parts of acrylic acid, 50 parts of deionized water and 4 parts of 6mol/L hydrogen peroxide.
Adding malic acid, sodium chloride, phenolic resin, polypropylene oxide, acrylic acid and deionized water into a container, stirring and mixing, heating in a water bath to 60 ℃, slowly adding 6mol/L hydrogen peroxide, wherein the total adding time of the hydrogen peroxide is 25min, and continuously reacting for 40min after the hydrogen peroxide is completely added; and then cooling to room temperature, adding sodium hydroxide with the concentration of 7mol/L, and adjusting the pH value to 8 to obtain the quick-drying and quick-setting type cement water reducing agent composition.
Example 4, a quick-drying and quick-setting type cement water reducing agent composition, characterized in that: the raw materials consist of the following components: malic acid, sodium chloride, phenolic resin, polypropylene oxide, acrylic acid, hydrogen peroxide, deionized water and sodium hydroxide; wherein the concentration of the hydrogen peroxide is 6 mol/L.
The coating comprises, by weight, 4 parts of malic acid, 4 parts of sodium chloride, 12 parts of phenolic resin, 15 parts of polypropylene oxide, 16 parts of acrylic acid, 50 parts of deionized water and 4 parts of 6mol/L hydrogen peroxide.
Adding malic acid, sodium chloride, phenolic resin, polypropylene oxide, acrylic acid and deionized water into a container, stirring and mixing, heating in a water bath to 60 ℃, slowly adding 6mol/L hydrogen peroxide, wherein the total adding time of the hydrogen peroxide is 25min, and continuously reacting for 40min after the hydrogen peroxide is completely added; and then cooling to room temperature, adding sodium hydroxide with the concentration of 7mol/L, and adjusting the pH value to 8 to obtain the quick-drying and quick-setting type cement water reducing agent composition.
Example 5 a quick-drying and quick-setting type cement water reducing agent composition, characterized in that: the raw materials consist of the following components: malic acid, sodium chloride, phenolic resin, polypropylene oxide, acrylic acid, hydrogen peroxide, deionized water and sodium hydroxide; wherein the concentration of the hydrogen peroxide is 6 mol/L.
The coating comprises, by weight, 4 parts of malic acid, 4 parts of sodium chloride, 12 parts of phenolic resin, 15 parts of polypropylene oxide, 15 parts of acrylic acid, 50 parts of deionized water and 4 parts of 6mol/L hydrogen peroxide.
Adding malic acid, sodium chloride, phenolic resin, polypropylene oxide, acrylic acid and deionized water into a container, stirring and mixing, heating in a water bath to 60 ℃, slowly adding 6mol/L hydrogen peroxide, wherein the total adding time of the hydrogen peroxide is 25min, and continuously reacting for 40min after the hydrogen peroxide is completely added; and then cooling to room temperature, adding sodium hydroxide with the concentration of 7mol/L, and adjusting the pH value to 8 to obtain the quick-drying and quick-setting type cement water reducing agent composition.
Example 6, a quick-drying and quick-setting type cement water reducing agent composition, characterized in that: the raw materials consist of the following components: malic acid, sodium chloride, phenolic resin, polypropylene oxide, acrylic acid, hydrogen peroxide, deionized water and sodium hydroxide; wherein the concentration of the hydrogen peroxide is 6 mol/L.
The coating comprises, by weight, 4 parts of malic acid, 4 parts of sodium chloride, 12 parts of phenolic resin, 15 parts of polypropylene oxide, 15 parts of acrylic acid, 50 parts of deionized water and 4 parts of 6mol/L hydrogen peroxide.
Adding malic acid, sodium chloride, phenolic resin, polypropylene oxide, acrylic acid and deionized water into a container, stirring and mixing, heating in a water bath to 65 ℃, slowly adding 6mol/L hydrogen peroxide for 30min, and continuing to react for 50min after the hydrogen peroxide is added; and then cooling to room temperature, adding sodium hydroxide with the concentration of 7mol/L, and adjusting the pH value to 8 to obtain the quick-drying and quick-setting type cement water reducing agent composition.
Comparative example 1, a quick-drying and quick-setting type cement water reducing agent composition, which is characterized in that: the raw materials consist of the following components: citric acid, calcium chloride, polyimide resin, polypropylene oxide, acrylic acid, hydrogen peroxide, deionized water and sodium hydroxide; wherein the concentration of the hydrogen peroxide is 8 mol/L.
The coating comprises, by weight, 3 parts of citric acid, 4 parts of calcium chloride, 15 parts of polyimide resin, 20 parts of polypropylene oxide, 12 parts of acrylic acid, 40 parts of deionized water and 3 parts of 8mol/L hydrogen peroxide.
Adding citric acid, calcium chloride, polyimide resin, polypropylene oxide, acrylic acid and deionized water into a container, stirring and mixing, heating in a water bath to 50 ℃, slowly adding 8mol/L hydrogen peroxide, wherein the total adding time of the hydrogen peroxide is 20min, and continuously reacting for 60min after the hydrogen peroxide is added; and then cooling to room temperature, adding sodium hydroxide with the concentration of 6mol/L, and adjusting the pH value to 7.5 to obtain the quick-drying and quick-setting type cement water reducer composition.
Comparative example 2, a quick-drying and quick-setting type cement water reducing agent composition, which is characterized in that: the raw materials consist of the following components: malic acid, sodium chloride, phenolic resin, polyethylene glycol, n-butyric acid, hydrogen peroxide, deionized water and sodium hydroxide; wherein the concentration of the hydrogen peroxide is 8 mol/L.
The coating comprises, by weight, 3 parts of malic acid, 4 parts of sodium chloride, 15 parts of phenolic resin, 20 parts of polyethylene glycol, 12 parts of n-butyric acid, 40 parts of deionized water and 3 parts of 8mol/L hydrogen peroxide.
Adding malic acid, sodium chloride, phenolic resin, polyethylene glycol, n-butyric acid and deionized water into a container, stirring and mixing, heating in a water bath to 50 ℃, slowly adding 8mol/L hydrogen peroxide for 20min, and continuously reacting for 60min after the hydrogen peroxide is completely added; and then cooling to room temperature, adding sodium hydroxide with the concentration of 6mol/L, and adjusting the pH value to 7.5 to obtain the quick-drying and quick-setting type cement water reducer composition.
Comparative example 3, a quick-drying and quick-setting type cement water reducing agent composition, which is characterized in that: the raw materials consist of the following components: malic acid, sodium chloride, phenolic resin, polypropylene oxide, acrylic acid, hydrogen peroxide, deionized water and sodium hydroxide; wherein the concentration of the hydrogen peroxide is 8 mol/L.
Wherein, the paint comprises, by weight, 10 parts of malic acid, 3 parts of sodium chloride, 20 parts of phenolic resin, 5 parts of polypropylene oxide, 20 parts of acrylic acid, 65 parts of deionized water and 8 parts of 8mol/L hydrogen peroxide.
Adding malic acid, sodium chloride, phenolic resin, polypropylene oxide, acrylic acid and deionized water into a container, stirring and mixing, heating in a water bath to 80 ℃, slowly adding 8mol/L hydrogen peroxide, wherein the total adding time of the hydrogen peroxide is 60min, and continuously reacting for 90min after the hydrogen peroxide is added; and then cooling to room temperature, adding sodium hydroxide with the concentration of 6mol/L, and adjusting the pH value to 10 to obtain the quick-drying and quick-setting type cement water reducing agent composition.
And (3) performance detection: the water-reducing agent compositions of examples 1 to 6 and comparative examples 1 to 3 of the present application were added to portland cement having a strength grade of 42.5, wherein the amount of the water-reducing agent composition added was 0.5% by mass of the cement. The adopted cement is Portland cement with the strength grade of 42.5, the initial setting is not earlier than 45min, the final setting is not later than 6.5h, the compressive strength of 3d is 17MPa, the flexural strength is 3.5MPa, the compressive strength of 28d is 42.5MPa, and the flexural strength is 6.5 MPa. The cement paste fluidity of the water reducing agent composition is tested by referring to the experimental method for the homogeneity of GB/T8077-. The water reducing rate is tested by referring to GB 8076-2008-concrete admixture.
The results of the cement property test by adding the water reducing agent compositions of examples 1 to 6 and comparative examples 1 to 3 of the present application are shown in Table 1.
TABLE 1 Cement Performance test results with Water reducer composition addition
As can be seen from Table 1, the cement water reducing agent composition can improve the water reducing rate of the water reducing agent, improve the fluidity of cement, accelerate the solidification speed of cement paste under the condition of meeting the requirements and improve the compressive strength and the breaking strength of the cement. In the presence of malic acid: sodium chloride: when the ratio of the phenolic resin is 1:1:3 and the ratio of the polypropylene oxide to the acrylic acid is (1-1.2): 1, the cement has high fluidity, strength and water reduction rate and high cement solidification speed.
The foregoing examples are set forth to illustrate the present invention more clearly and should not be construed as limiting the scope of the present invention, which is intended to be limited thereby, and all such changes and modifications that can be made without departing from the scope of the present invention are intended to be within the scope of the present invention.
Claims (10)
1. A quick-drying and quick-setting type cement water reducing agent composition is characterized in that: the raw materials consist of the following components: malic acid, sodium chloride, phenolic resin, polypropylene oxide, acrylic acid, hydrogen peroxide, deionized water and sodium hydroxide; wherein the concentration of the hydrogen peroxide is 5-8 mol/L; wherein the concentration of the sodium hydroxide is 6-8mol/L, and the concentration of the hydrogen peroxide is 5-8 mol/L; 3-6 parts of malic acid, 4-8 parts of sodium chloride, 8-15 parts of phenolic resin, 10-20 parts of polypropylene oxide, 12-18 parts of acrylic acid, 40-60 parts of deionized water and 3-6 parts of 5-8mol/L hydrogen peroxide.
2. The quick-drying and quick-setting type cement water reducer composition according to claim 1, characterized in that malic acid, sodium chloride, phenolic resin, polypropylene oxide, acrylic acid and deionized water are added into a container to be stirred and mixed, the mixture is heated in a water bath, 5-8mol/L hydrogen peroxide is slowly added, the total adding time of the hydrogen peroxide is 20-40min, and the reaction is continued after the hydrogen peroxide is added; and then cooling to room temperature, adding sodium hydroxide with the concentration of 6-8mol/L, and adjusting the pH value to 7.5-8.5 to obtain the quick-drying and quick-setting type cement water reducer composition.
3. The quick-drying and quick-setting type cement water reducing agent composition as claimed in claim 2, wherein the temperature of water bath heating is 50-70 ℃; preferably, the water bath is heated to 65 ℃.
4. The quick-drying and quick-setting type cement water reducing agent composition according to claim 2 or 3, characterized in that the reaction time is 30-60min after the hydrogen peroxide is added.
5. The quick-drying and quick-setting type cement water reducing agent composition according to claim 2 or 3, wherein the ratio of the malic acid to the sodium chloride to the phenolic resin is 1:1: 3.
6. The quick-drying and quick-setting water reducing agent composition for cement according to claim 2 or 3, wherein the ratio of polypropylene oxide to acrylic acid is (1-1.2): 1.
7. The quick-drying and quick-setting type cement water reducing agent composition according to claim 2 or 3, wherein the phenolic resin is 12-14 parts.
8. The quick-drying and quick-setting type cement water reducing agent composition according to claim 2 or 3, wherein the concentration of the hydrogen peroxide is 6 mol/L.
9. The quick-drying and quick-setting type cement water reducing agent composition according to claim 2 or 3, characterized in that the total time of adding the hydrogen peroxide is 30min, and the reaction is continued for 50min after the hydrogen peroxide is added.
10. The quick-drying and quick-setting type cement water reducing agent composition according to claim 2 or 3, wherein sodium hydroxide is added at a concentration of 7mol/L to adjust the pH value to 8.
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