CN112876130B - Cement grinding aid and preparation method thereof - Google Patents
Cement grinding aid and preparation method thereof Download PDFInfo
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- CN112876130B CN112876130B CN202110411479.8A CN202110411479A CN112876130B CN 112876130 B CN112876130 B CN 112876130B CN 202110411479 A CN202110411479 A CN 202110411479A CN 112876130 B CN112876130 B CN 112876130B
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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
- C04B2103/52—Grinding aids; Additives added during grinding
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Abstract
The application relates to the technical field of cement additives, and particularly discloses a cement grinding aid and a preparation method thereof, wherein the cement grinding aid comprises the following raw materials in parts by weight: 10-20 parts of p-aminophenol, 8-20 parts of alcohol amine compounds, 3-5 parts of alkyl glycoside, 1-3 parts of sodium hexametaphosphate, 2-4 parts of bentonite, 1-2 parts of docetaxel, 1-3 parts of a dispersant, 0.8-1.6 parts of a stabilizer and 20-40 parts of deionized water; the preparation method comprises the following steps: mixing p-aminophenol, an alcamine compound, docetaxel and deionized water, adding sodium hexametaphosphate and a stabilizer after uniformly mixing, adding alkyl glycoside, bentonite and a dispersing agent after uniformly mixing, and mixing uniformly to obtain a cement grinding aid; the cement grinding aid has the advantage of enhancing the cement grinding effect.
Description
Technical Field
The application relates to the technical field of cement additives, in particular to a cement grinding aid and a preparation method thereof.
Background
The cement grinding aid is an additive which is added during cement grinding and has the effect of grinding aid without damaging the performance of cement concrete, and the existing grinding aid becomes one of effective energy-saving and consumption-reducing measures in the cement grinding process.
The grinding aid mainly eliminates adhesion and aggregation caused by static electricity, adsorbs the surfaces of solid particles, reduces the free energy of the surfaces of the particles, and reduces the hardness and strength of the surfaces of materials, thereby enhancing the grinding efficiency; the existing grinding aids are mainly divided into two categories, namely solid grinding aids and liquid grinding aids, wherein the components of the solid grinding aids often comprise fly ash, industrial salt and the like, and the components of the liquid grinding aids often comprise polymeric polyol, glycol, sodium fatty acid and the like.
Through the related technology, the grinding aid cement used at present has poor grinding aid effect, and industrial salt in the solid grinding aid contains more chloride ions and easily damages the cement performance, so that the grinding aid effect is poor; and substances such as polymeric polyol in the liquid grinding aid have poor stability, so that the cement grinding effect is poor easily.
Disclosure of Invention
In order to enhance the grinding effect of the cement grinding aid, the application provides the cement grinding aid and a preparation method thereof.
In a first aspect, the application provides a cement grinding aid, which adopts the following technical scheme:
a cement grinding aid comprises the following raw materials in parts by weight:
10-20 parts of p-aminophenol;
8-20 parts of an alcohol amine compound;
3-5 parts of alkyl glycoside;
1-3 parts of sodium hexametaphosphate;
2-4 parts of bentonite;
1-2 parts of docetaxel;
1-3 parts of a dispersant;
0.8-1.6 parts of a stabilizer;
20-40 parts of deionized water.
By adopting the technical scheme, after the p-aminophenol and the alcohol amine compound are compounded, the aminophenol amino alcohol compound is formed, the particle size of particles in the cement raw material is reduced, and thus the effect of grinding the cement by using the cement grinding aid is enhanced; after the alkyl glycoside, the docetaxel and the dispersant are combined, the mixture is adsorbed on the surfaces of particles in cement, so that the electrostatic repulsion between the particles is improved, the particles are effectively dispersed, and the grinding-assisting effect is further achieved; after the cement grinding aid is added into the bentonite, the bentonite is combined with substances such as sodium hexametaphosphate and the like, so that the electrostatic repulsion effect is enhanced, the dispersion degree of the cement is further increased, and the grinding efficiency of the grinding aid is enhanced; in conclusion, the grinding effect of the cement grinding aid is enhanced by compounding the p-aminophenol and the alcohol amine compound and adding the substances such as alkyl glycoside, docetaxel and the like for combination.
Preferably, the dispersant comprises at least one of oleic acid polyoxyethylene ether and nekal.
By adopting the technical scheme, the dispersing agent is preferably one or two of acid polyoxyethylene ether and nekal, and is better matched with sodium hexametaphosphate and docetaxel to prevent particles from coalescing, so that cement is easily ground, and the grinding effect of the cement grinding aid is enhanced.
Preferably, the stabilizer consists of carbon black and hydrotalcite, and the weight ratio of the carbon black to the hydrotalcite is 1 (1-3).
By adopting the technical scheme, the stabilizing agent is carbon black and hydrotalcite, and the weight ratio of the stabilizing agent is optimized, so that the stability of the cement grinding aid is enhanced, and the grinding effect of the cement grinding aid is further enhanced.
Preferably, the raw materials of the cement grinding aid also comprise 1-3 parts by weight of reinforcing agent, and the reinforcing agent comprises at least one of sodium polyacrylate and konjac glucomannan.
By adopting the technical scheme, the reinforcing agent is added into the cement grinding aid, the reinforcing agent is preferably one or two of sodium polyacrylate and konjac glucomannan, and the reinforcing agent is matched with docetaxel and a stabilizing agent to stabilize the cement grinding aid and enhance the electrostatic repulsion effect at the same time, so that the binding force among cement particles is reduced, and the cement grinding effect is enhanced.
Preferably, the reinforcing agent consists of sodium polyacrylate and konjac glucomannan, and the weight ratio of the sodium polyacrylate to the konjac glucomannan is 1 (1-2).
By adopting the technical scheme, the sodium polyacrylate and the konjac glucomannan are adopted as the reinforcing agent and are matched, so that the cement is more easily ground by reducing the mutual adhesive force between cement particles, and the grinding efficiency of the cement grinding aid is improved.
Preferably, the raw materials of the cement grinding aid also comprise 2-3 parts by weight of an auxiliary agent, wherein the auxiliary agent comprises at least one of hydroxypropyl cellulose and sodium carboxymethyl cellulose.
By adopting the technical scheme, the auxiliary agent is added into the cement auxiliary agent, preferably one or two of hydroxypropyl cellulose and sodium carboxymethyl cellulose, and is combined with the stabilizer and the reinforcing agent, so that the flowing state of the cement material is improved, the particles of the cement material are uniformly distributed, the crushing and grinding of the particles in the cement are promoted, and the grinding effect of the cement grinding aid is further enhanced.
Preferably, the alkanolamine compound comprises at least one of triethanolamine and triisopropanolamine.
By adopting the technical scheme, the alcamines are preferably selected from one or two of triethanolamine and triisopropanolamine and are better matched with p-aminophenol, so that the aggregation force among particles in the cement grinding process is shielded, the agglomeration among the particles is prevented, and the grinding effect of the cement grinding aid is further enhanced.
In a second aspect, the application provides a preparation method of a cement grinding aid, which adopts the following technical scheme:
a preparation method of a cement grinding aid comprises the following steps:
s1, mixing the p-aminophenol, the alcohol amine compound, the docetaxel and the deionized water, and uniformly mixing to obtain a first mixture; s2, mixing the first mixture with sodium hexametaphosphate and a stabilizer, and uniformly mixing to obtain a second mixture;
and S3, mixing the second mixture, alkyl glycoside, bentonite and a dispersing agent together, and uniformly mixing to obtain the cement grinding aid.
By adopting the technical scheme, firstly, p-aminophenol, an alcohol amine compound and a docetaxel substance are fully mixed with deionized water, and then sodium hexametaphosphate and a stabilizer are added to enhance the stability of an aminophenol amino alcohol compound formed in a first mixture; then adding alkyl glycoside, bentonite and a dispersing agent, fully dispersing the cement grinding aid, and improving the uniform grinding-aid performance of the cement grinding aid; the preparation method of the cement grinding aid is simple to operate, and the cement grinding aid with excellent cement grinding aid effect can be obtained.
Preferably, the auxiliary agent and the reinforcing agent are added in the step S2, and are mixed together with the first mixture, the sodium hexametaphosphate and the stabilizer.
By adopting the technical scheme, the auxiliary agent and the reinforcing agent are added in the step S2, so that the free energy of the particle surface is reduced, the friability of the cement material particles is further improved, and the cement grinding effect is enhanced.
Preferably, the temperature during the mixing in the step S1 is 32-45 ℃.
By adopting the technical scheme, the temperature of the step S1 in the preparation process is controlled, so that all materials of the cement grinding aid are fully and uniformly mixed, the docetaxel is promoted to fully play a grinding-aiding role, and the performance of the cement is enhanced.
In summary, the present application has the following beneficial effects:
1. because the amino phenol amino alcohol compound is formed by compounding the p-aminophenol and the alcohol amine compound, the grinding effect of the cement grinding aid is enhanced; sodium hexametaphosphate and docetaxel are added for combination, so that the electrostatic repulsion effect among cement particles is enhanced, and the grinding aid effect of cement is further enhanced; and adding a stabilizer to be matched with the aminophenol amino alcohol compound, so as to enhance the stabilizer of the cement grinding aid and further enhance the grinding-aiding effect of the cement grinding aid.
2. In the application, one or two of oleic acid polyoxyethylene ether and nekal are preferably used as a dispersing agent to be combined with sodium hexametaphosphate and docetaxel to reduce the aggregation of cement particles, so that the grinding effect of the cement grinding aid is enhanced; carbon black and hydrotalcite are preferably used as stabilizing agents to enhance the stability of the cement grinding aid; and a reinforcing agent and an auxiliary agent are added, wherein the sodium acrylate and the konjac glucomannan in the reinforcing agent are combined, so that the electrostatic repulsion effect among cement particles is enhanced, and the grinding aiding efficiency of the cement is improved.
3. According to the method, all raw materials in the cement grinding aid are mixed step by step, the cement grinding aid is fully dispersed, and the uniform grinding aid performance of the cement grinding aid is improved.
Detailed Description
The present application is described in further detail below.
The components and manufacturers in the examples are shown in Table 1.
TABLE 1 Components and manufacturers
| Components | Model/specification | Manufacturer of the product |
| Portland cement | P.O 42.5.5 stage | Conch cement plant |
| P-aminophenol | kds7489465 | Conditis chemical industry (Hubei) Co Ltd |
| Triisopropanolamine | 122-20-3 | Jinan Hui Jingchuan chemical Co Ltd |
| Triethanolamine | 01 | Chemical Co Ltd of Jinan Guangyu province |
| Diethanolamine (DEA) | 111-42-2 | Chemical Co Ltd of Jinan Guangyu province |
| Alkyl glycosides | 157707-88-5 | Shanghai Pengpeng chemical Co Ltd |
| Sodium hexametaphosphate | / | Shenzhen Lefu Biotech Co Ltd |
| Bentonite clay | xh19 | Lingshou county hongtao ore processing factory |
| Docetaxel | 114977-28-5 | Shanghai Han Xiang Biotechnology Limited |
| Oleic acid polyoxyethylene ether | A-105 | NANTONG HONGSHEN CHEMICAL Co.,Ltd. |
| Pull-apart powder | 0118 | Jinan Engineer trade Limited |
| Fatty alcohol polyoxyethylene ether | AEO-9 | Jinan Engineer trade Limited |
| Carbon black | / | Xian Musson bioengineering Ltd |
| Hydrotalcite | 822-16-2 | Henan Wanshan New Material Technology Co., Ltd. |
| Polyacrylamide sodium salt | feacw | Jiangsu Caosheng Biotech Co., Ltd |
| Konjac glucomannan | 37220-17-0 | Hubei Liansheng bioengineering Co Ltd |
| Hydroxypropyl cellulose | 075 | Chemical Co Ltd |
| Sodium carboxymethylcellulose | 20200510 | Shenzhen Lefu Biotech Co Ltd |
Examples
Example 1:
the cement grinding aid comprises the following specific components by weight as shown in Table 2, and is prepared by the following steps:
s1, mixing and stirring the p-aminophenol, the alcohol amine compound, the docetaxel and the deionized water at the temperature of 30 ℃, wherein the stirring speed is 1200r/min, and uniformly stirring to obtain a first mixture;
and S2, mixing and stirring the first mixture, sodium hexametaphosphate, a stabilizer, alkyl glycoside, bentonite and a dispersant together at the stirring speed of 1500r/min, and uniformly stirring and mixing to obtain the cement grinding aid.
Example 2A cement grinding aid differs from example 1 in the components and weights included in the specific components and weights shown in Table 2.
Examples 3-4A cement grinding aid differs from example 1 in the components and weights of the dispersant, and the specific components and weights included are shown in Table 2.
Examples 5-6A cement grinding aid differs from example 1 in the components and weights of the stabilizer, which are included as specified in Table 2.
Examples 7-10A cement grinding aid, differing from example 1 in that the reinforcing agent was added in step S2, comprising the specific components and weights as indicated in Table 2.
Examples 11-12A cement grinding aid, different from example 1 in that an auxiliary agent was added in step S2, comprising the specific components and weights shown in Table 2.
Examples 13 to 14: a cement grinding aid is different from the cement grinding aid in example 1 in that the specific components of the alcohol amine compound are different, and the specific components and the weight are shown in Table 2.
Example 15A cement grinding aid, different from example 1 in that it was prepared by a method comprising the steps of: s1, mixing and stirring the p-aminophenol, the alcohol amine compound, the docetaxel and the deionized water at the temperature of 30 ℃, wherein the stirring speed is 1200r/min, and uniformly stirring to obtain a first mixture;
s2, mixing and stirring the first mixture, sodium hexametaphosphate and a stabilizer at a stirring speed of 800r/min to obtain a second mixture;
and S3, mixing and stirring the second mixture, the alkyl glycoside, the bentonite and the dispersant together at a stirring speed of 1500r/min, and uniformly stirring and mixing to obtain the cement grinding aid.
Example 16A cement grinding aid which differs from that of example 15 in that the temperature during the mixing in step S1 was 32 ℃.
Example 17A cement grinding aid which differs from that of example 15 in that the temperature during mixing in step S1 was 45 ℃.
Examples 18-19A cement grinding aid, different from example 1 in that it comprises the following specific components and weights as shown in Table 2, comprises the following steps:
s1, mixing and stirring the p-aminophenol, the alcohol amine compound, the docetaxel and the deionized water at the temperature of 32 ℃, wherein the stirring speed is 1200r/min, and uniformly stirring to obtain a first mixture;
s2, mixing and stirring the first mixture, sodium hexametaphosphate and a stabilizer at a stirring speed of 800r/min to obtain a second mixture;
and S3, mixing and stirring the second mixture, the alkyl glycoside, the bentonite, the dispersant, the reinforcing agent and the auxiliary agent together at the stirring speed of 1500r/min, and uniformly mixing and stirring to obtain the cement grinding aid.
TABLE 2 specific compositions and weights of examples 1-14, examples 18-19
Comparative example
Comparative example 1A cement grinding aid which differs from example 1 in that it does not contain an alkyl glycoside.
Comparative example 2 a cement grinding aid, which differs from example 1 in that docetaxel is not contained.
Comparative example 3 a cement grinding aid which differs from example 1 in that it does not contain alkyl glycoside and docetaxel.
Comparative example 4 a cement grinding aid, distinguished from example 1 by the absence of a stabilizer.
Comparative example 5A cement grinding aid consisting of the following components: 20 parts of diethanolamine, 26 parts of glycerol, 8 parts of molasses, 5 parts of fatty alcohol-polyoxyethylene ether, 25 parts of sodium thiocyanate, 15 parts of alkylphenol polyoxyethylene ether, 15 parts of industrial salt and 100 parts of water; the diethanolamine is selected from the chemical industry Co., Ltd, type 01; the glycerol is selected from Shijiazhuang Huixiang grease chemical company, and the molasses is selected from Jinlongjie chemical company, model 77; the fatty alcohol-polyoxyethylene ether is selected from Jinzheng trade company, model AEO-9; the sodium thiocyanate is selected from Jiangsu Xuan Fine chemical Co., Ltd, model 540-72-7; the alkylphenol ethoxylates is selected from Shanghai Senfii Chemicals Co., Ltd, model TX-10; the industrial salt is selected from Hangzhou Xiitai chemical Co.
The preparation method comprises the following steps: weighing water and sodium thiocyanate according to the raw material ratio, adding the water and the sodium thiocyanate into a reaction kettle, starting stirring, controlling the temperature to be normal temperature, and stirring for 25 min;
adding diethanolamine and alkylphenol ethoxylates in the stirring state, heating to 85 ℃, and stirring for 2 hours; and then cooling the temperature to 63 ℃, continuously adding the fatty alcohol-polyoxyethylene ether, the industrial salt, the glycerol and the molasses in sequence, stirring for 2 hours, cooling to 25 ℃, and packaging.
Detection method
Experiment one: experiment sample of the screen residue: examples 1 to 19 and comparative examples 1 to 5 were added to portland cement in an amount of 2.5% by weight and sampled in accordance with the sampling method of GB12573-1990, and the samples obtained from examples 1 to 19 were respectively designated as experimental samples 1 to 19, and the samples obtained from comparative examples 1 to 5 were respectively designated as comparative samples 1 to 5, and each of experimental samples 1 to 19 and comparative samples 1 to 5 had 5 samples.
An experimental instrument: and (4) screening by using a 45-micron square hole screen.
The experimental method comprises the following steps: carrying out a screen residue test on the experimental samples 1-19 and the comparative samples 1-5 according to a 45-micrometer square hole screen in a cement fineness test method screen analysis method of national standard GB/T1345-2005, and calculating the screen residue of each experimental sample; for example, the screen residue amounts of 5 samples in the test sample 1 are measured, and the average value is taken as the final screen residue amount of the test sample 1.
The above experimental methods were used to perform the oversize test on experimental samples 2-19 and comparative samples 1-5.
The experimental results are as follows: the results of the triage test for the experimental samples 1-19 and the comparative samples 1-5 are shown in Table 3.
Experiment two: specific surface area experiment experimental sample: the samples obtained from examples 1 to 19 and comparative examples 1 to 5 were designated as experimental samples 1 to 19 and comparative samples 1 to 5, respectively, by adding the samples to portland cement in an amount of 2.5% by weight, sampling according to GB12573, passing through a 0.9mm square mesh sieve, drying at 110 ℃ for 1 hour, and cooling to 25 ℃ in a drier.
An experimental instrument: a drying box (selected from Yongonline mechanical equipment factory of Wujiang City, model DHG-9000); analytical balance (selected from Mettler-Torledo International Inc., model XPR204S/AC), specific surface area U-gauge (see GB/T8074-2008).
The experimental method comprises the following steps: the specific surface area test was carried out on the experimental samples 1 to 19 and the comparative samples 1 to 5 according to the method of "cement specific surface area measurement method Boehringer method" with the standard number GB/T8074-2008.
The experimental results are as follows: the results of the specific surface area tests of the test samples 1 to 19 and the comparative samples 1 to 5 are shown in Table 3.
Experiment three: experimental sample of compressive strength: adding the samples 1 to 19 and the comparative examples 1 to 5 into Portland cement in an addition amount of 2.5 percent by weight to respectively prepare 40mm multiplied by 40mm prism samples, wherein the samples are prepared by mixing one part of cement and three parts of China ISO standard sand by weight with a water cement ratio of 0.5 to prepare a group of plastic cement sand; the samples were cured in moisture together with the mold for 24 hours, and then demolded and cured in water to a strength test, and the prismatic samples prepared and cured by the addition examples 1 to 19 were respectively named as test samples 1 to 19, and the prismatic samples prepared and cured by the addition comparative examples 1 to 5 were respectively named as comparative samples 1 to 5.
An experimental instrument: compressive strength tester (model number DY-208 JC).
The experimental method comprises the following steps: according to the specification of the cement mortar strength test method (ISO method) with the standard number of GB/T17671-1999, the cement strength is measured, a test piece is manufactured according to the specification, the test piece is maintained, and the compressive strength value at the specified age is measured to evaluate the cement strength;
the experimental sample 1 is placed on a compressive strength tester, the difference between the center of the experimental sample 1 and the center of a compression strength tester compression plate is within +/-0.5 mm, and the part of the experimental sample 1 exposed out of the compression plate is about 10 mm. The charge was uniformly applied at a rate of 2400N/s throughout the entire charge until failure.
The compressive strength Rc is calculated in MPa according to (1):
Rc＝Fc/A (1)
in the formula: fc is the maximum load at failure; a is the pressed area (40mm x 40mm 1600 mm)2)。
The test samples 2 to 19 and the comparative samples 1 to 5 were each subjected to the test for compressive strength according to the above test methods.
The experimental results are as follows: the results of the compressive strength of the experimental samples 1 to 19 and the comparative samples 1 to 5 are shown in Table 3.
TABLE 3 results of the experiments of the experimental samples 1 to 19 and the comparative samples 1 to 5
As can be seen from the experimental data in Table 3, the 45 μm sieve residue of the experimental samples 1 to 19 was 4.2 to 7.5%, and the specific surface area was 385-431m2·kg-1The 28d compressive strength is 51.8-56.3MPa, which shows that the experimental samples 1-19 have small particle size, large crushing degree, high compressive strength and good stability; while comparative samples 1 to 19 had a 45 μm sieve residue of 8.3 to 12.1% and a specific surface area of 281 to 3.57m2·kg-1And the 28d compressive strength is 39.8-47.3MPa, the grinding degree is low, the particle size is larger, and the grinding degree is small and the compressive strength is smaller.
Comparing the experimental sample 1 with the comparative samples 1-3, it can be seen that after the alkyl glycoside is added, the 45 μm sieve residue is reduced, the specific surface area is increased, which indicates that the particle pulverizability in the cement is higher, and indicates that the grinding aid containing the alkyl glycoside can enhance the grinding effect of the cement; after docetaxel is added, the 45-micron sieve residue is reduced, the specific surface area is increased, which shows that the particle pulverizability in cement is higher, and shows that a grinding aid containing docetaxel can enhance the grinding effect of cement; comparing the experimental sample 1 and the comparative sample 3, it can be seen that the pulverization degree of the cement particles is greatly increased after the cement particles contain the alkyl glycoside and the docetaxel; after the two are combined, the synergistic effect is achieved, the particles are adsorbed on the surfaces of the particles in the cement, the electrostatic repulsion effect among the particles is enhanced, the agglomeration of the particles is reduced, and the grinding effect is enhanced. Comparing the experimental sample 1 and the comparative sample 4, it can be seen that when the stabilizer is not contained, the screen allowance is increased, which indicates that the particles in the cement are large and the grinding effect is not good, and indicates that the stabilizer can also enhance the cement grinding effect.
Comparing the experimental sample 1 with the experimental samples 3-4, it can be seen that after the dispersant is preferably polyoxyethylene oleate, and the powder is pulled out, the 45 μm sieve residue is reduced, and the specific surface area is increased, which indicates that the particles in the cement are finer, the grinding effect is enhanced, and after the polyoxyethylene oleate, the powder is combined with sodium hexametaphosphate and docetaxel, the surface energy of the particles is reduced, and the cement particles are prevented from coalescing, so that the grinding is easy to perform, and the cement with better grinding effect is obtained; comparing the experimental sample 1 with the experimental samples 5-6, it can be seen that after the carbon black and the hydrotalcite are preferably selected as the stabilizer, the 45 μm sieve residue is reduced, the specific surface area is increased, and meanwhile, the compressive strength is increased, which indicates that the grinding effect of the cement grinding aid is good; carbon black and hydrotalcite in the stabilizer are matched with the dispersant to enhance the cement grinding effect on one hand, and the stability of substances such as the dispersant and the like is enhanced on the other hand, so that the cement grinding effect is further enhanced; comparing the experimental sample 1 with the experimental samples 7-10, the intensifier preferably selects sodium polyacrylate and konjac glucomannan to obtain cement with small particle size; the sodium polyacrylate has high negative charge density, so that the absolute value of the surface potential of cement particles is increased, the electrostatic repulsion is enhanced, mutual aggregation and gravity settlement among particles are hindered, the dispersion degree of the particles is enhanced, the cement grinding effect is enhanced, the weight ratio of the reinforcing agent is optimized, the matching effect is better, and the grinding effect of the cement grinding aid is further enhanced; comparing the experimental sample 1 with the experimental samples 11-12, it can be seen that after the addition of the auxiliary agents of hydroxypropyl cellulose and carboxymethyl cellulose, the 45 μm sieve residue is reduced, the specific surface area is increased, and the compressive strength is also improved to a certain extent, which indicates that the auxiliary agents can enhance the effect of the cement grinding aid in grinding cement; comparing the experimental sample 1 with the experimental samples 13-14, it can be seen that after the alkanolamine compound selects one or two of triethanolamine and triisopropanolamine, the 45 μm sieve residue is reduced, which indicates that the particle size of the cement particles is reduced; the triethanolamine and the triisopropanolamine can be better matched with the p-aminophenol, so that the aggregation force among particles generated in the cement grinding process is shielded, the particles are prevented from being aggregated, and the grinding effect of the cement grinding aid is further enhanced;
comparing the experimental sample 1 with the experimental sample 15, it can be seen that different preparation methods bring about a certain influence on the grinding effect of the cement grinding aid, and the influence degree is small; comparing the experimental samples 15-17, it can be known that the temperature in step S1 is controlled to uniformly mix the raw materials of the cement grinding aid, promote docetaxel to play a grinding-aiding role, and enhance the effect of the cement grinding aid in grinding cement; comparing the experimental sample 1 with the experimental samples 18-19, it can be seen that after the addition of the auxiliary agent and the reinforcing agent, preferably the preparation method of the cement grinding aid, and preferably the alcohol amine compound, the stabilizing agent and the dispersing agent, the cement with smaller particle size is obtained, which indicates that the cement grinding effect of the cement grinding aid is enhanced.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (7)
1. The cement grinding aid is characterized by comprising the following raw materials in parts by weight:
10-20 parts of p-aminophenol;
8-20 parts of an alcohol amine compound;
3-5 parts of alkyl glycoside;
1-3 parts of sodium hexametaphosphate;
2-4 parts of bentonite;
1-2 parts of docetaxel;
1-3 parts of a dispersant;
0.8-1.6 parts of a stabilizer;
20-40 parts of deionized water;
the cement grinding aid also comprises 1-3 parts of reinforcing agent by weight, wherein the reinforcing agent comprises at least one of sodium polyacrylate and konjac glucomannan;
the cement grinding aid also comprises 2-3 parts of auxiliary agent by weight, wherein the auxiliary agent comprises at least one of hydroxypropyl cellulose and sodium carboxymethyl cellulose.
2. The cement grinding aid as claimed in claim 1, wherein the dispersant comprises at least one of polyoxyethylene oleate, nekal.
3. The cement grinding aid as claimed in claim 1, wherein the stabilizer consists of carbon black and hydrotalcite in a weight ratio of 1 (1-3).
4. The cement grinding aid as claimed in claim 1, wherein the reinforcing agent is composed of sodium polyacrylate and konjac glucomannan, and the weight ratio of the sodium polyacrylate to the konjac glucomannan is 1 (1-2).
5. The cement grinding aid as claimed in claim 1, wherein the alkanolamine compound comprises at least one of triethanolamine and triisopropanolamine.
6. The method for preparing the cement grinding aid as claimed in any one of claims 1 to 5, which is characterized by comprising the following steps:
s1, mixing the p-aminophenol, the alcohol amine compound, the docetaxel and the deionized water, and uniformly mixing to obtain a first mixture;
s2, mixing the first mixture with sodium hexametaphosphate, a stabilizer, an auxiliary agent and a reinforcing agent, and uniformly mixing to obtain a second mixture;
and S3, mixing the second mixture, alkyl glycoside, bentonite and a dispersing agent together, and uniformly mixing to obtain the cement grinding aid.
7. The method for preparing the cement grinding aid as claimed in claim 6, wherein the temperature during the mixing in the step S1 is 32-45 ℃.
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| CN115057636B (en) * | 2022-05-19 | 2023-05-23 | 北京金隅节能科技有限公司 | Slag grinding aid, preparation method thereof and cement using slag grinding aid |
| CN115124271B (en) * | 2022-06-18 | 2023-08-01 | 北京金隅水泥节能科技有限公司 | Cement grinding aid, preparation method thereof and cement |
| CN115819005B (en) * | 2022-11-15 | 2024-02-02 | 安徽海螺材料科技股份有限公司 | Modified alcohol amine efficient cement grinding aid and preparation method thereof |
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| US5556460A (en) * | 1995-09-18 | 1996-09-17 | W.R. Grace & Co.-Conn. | Drying shrinkage cement admixture |
| CN101913791B (en) * | 2010-07-29 | 2012-09-12 | 南京永能新材料有限公司 | Application of polylol glucoside as cement grinding aid |
| BR112014030944A2 (en) * | 2012-06-25 | 2017-06-27 | Dow Global Technologies Llc | grinding aid composition for grinding cement slag, cement mixture and method for increasing grinding efficiency and improving specific surface area of a cement |
| CN111423152A (en) * | 2020-05-08 | 2020-07-17 | 华润水泥技术研发（广西）有限公司 | Special grinding aid for improving later strength of cement |
| CN112047660B (en) * | 2020-08-25 | 2021-07-09 | 北京金隅水泥节能科技有限公司 | Grinding aid and production process and application thereof |
| CN112110673B (en) * | 2020-09-17 | 2022-06-03 | 武汉理工大学 | High-alumina solid waste chloride ion curing agent and preparation method and application thereof |
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