CN115448633B - Polycarboxylic acid desensitizer and preparation method thereof - Google Patents
Polycarboxylic acid desensitizer and preparation method thereof Download PDFInfo
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- CN115448633B CN115448633B CN202211227235.5A CN202211227235A CN115448633B CN 115448633 B CN115448633 B CN 115448633B CN 202211227235 A CN202211227235 A CN 202211227235A CN 115448633 B CN115448633 B CN 115448633B
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- 239000002253 acid Substances 0.000 title claims abstract description 115
- 229940090898 Desensitizer Drugs 0.000 title claims abstract description 75
- 238000002360 preparation method Methods 0.000 title abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 80
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 28
- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 28
- 239000000203 mixture Substances 0.000 claims abstract description 27
- 239000011259 mixed solution Substances 0.000 claims abstract description 15
- 229920001732 Lignosulfonate Polymers 0.000 claims abstract description 13
- GQOKIYDTHHZSCJ-UHFFFAOYSA-M dimethyl-bis(prop-2-enyl)azanium;chloride Chemical compound [Cl-].C=CC[N+](C)(C)CC=C GQOKIYDTHHZSCJ-UHFFFAOYSA-M 0.000 claims abstract description 11
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims abstract description 11
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims abstract description 11
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims abstract description 11
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims abstract description 10
- 229910052938 sodium sulfate Inorganic materials 0.000 claims abstract description 10
- 235000011152 sodium sulphate Nutrition 0.000 claims abstract description 10
- 235000019832 sodium triphosphate Nutrition 0.000 claims abstract description 9
- 239000002904 solvent Substances 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- 229920005551 calcium lignosulfonate Polymers 0.000 claims description 2
- RYAGRZNBULDMBW-UHFFFAOYSA-L calcium;3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Ca+2].COC1=CC=CC(CC(CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O RYAGRZNBULDMBW-UHFFFAOYSA-L 0.000 claims description 2
- 239000003975 dentin desensitizing agent Substances 0.000 claims 1
- 239000003638 chemical reducing agent Substances 0.000 abstract description 54
- 239000004567 concrete Substances 0.000 abstract description 49
- 239000000654 additive Substances 0.000 abstract description 8
- 238000002156 mixing Methods 0.000 description 19
- 229920005646 polycarboxylate Polymers 0.000 description 17
- 239000002994 raw material Substances 0.000 description 14
- 230000001603 reducing effect Effects 0.000 description 13
- 238000010276 construction Methods 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000035945 sensitivity Effects 0.000 description 7
- 230000000996 additive effect Effects 0.000 description 6
- 239000004566 building material Substances 0.000 description 4
- 239000004568 cement Substances 0.000 description 4
- 239000004927 clay Substances 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 238000004090 dissolution Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000000740 bleeding effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 239000008030 superplasticizer Substances 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 206010070834 Sensitisation Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011372 high-strength concrete Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 239000011376 self-consolidating concrete Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000003583 soil stabilizing agent Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to a polycarboxylic acid desensitizer and a preparation method thereof, belonging to the technical field of concrete additives. The polycarboxylic acid desensitizer is a mixed solution with the mass concentration of 30-60% formed by dissolving a mixture A in a solvent B, wherein the mixture A comprises the following components in parts by weight: 15-30 parts of polyethylene glycol, 25-35 parts of dimethyl diallyl ammonium chloride, 5-15 parts of sodium hexametaphosphate, 0-5 parts of sodium tripolyphosphate, 25-40 parts of lignosulfonate and 0-5 parts of sodium sulfate. The polycarboxylic acid desensitizer can reduce the influence of the polycarboxylic acid water reducer on sandstone aggregates with different qualities.
Description
Technical Field
The invention belongs to the technical field of concrete additives, and particularly relates to a polycarboxylic acid desensitizer and a preparation method thereof.
Background
The water reducer for concrete is a necessary condition for producing high-strength concrete, can prolong the time for maintaining plasticity of the concrete, reduces the water-cement ratio, can obviously improve the strength and durability of the concrete by reducing the water-cement ratio, and is a precondition for preparing products such as ultra-high-strength, self-leveling and self-compacting concrete. The polycarboxylate water reducer is a high-molecular water reducer, has high water reducing rate (the water reducing rate is up to more than 30 percent), and is currently becoming the main stream of the water reducer market.
The concrete quality is also influenced by the water content of sand, the temperature and the mixing amount measurement, the sensitivity of the polycarboxylic acid water reducer in concrete construction is also influenced by the quality of concrete, the sensitivity of the polycarboxylic acid water reducer in concrete is mainly shown in that when the polycarboxylic acid water reducer is directly applied to concrete, the polycarboxylic acid water reducer has good adaptability to mixing materials such as cement, ground slag powder and the like, but unstable working performance, easy segregation or larger slump loss and the like of the concrete are easily caused, and the newly mixed concrete mixed with the polycarboxylic acid additive cannot meet the technical requirements of site construction and the mechanical property and durability of the concrete cannot meet the design requirements. The problem that the production of the concrete doped with the polycarboxylate superplasticizer is difficult is caused, and potential safety hazards are possibly caused, so that the popularization and the use of the polycarboxylate superplasticizer are greatly restricted.
The polycarboxylate water reducer in the market is a polyether macromonomer, and the water reducing rate of the polycarboxylate water reducer has a relatively sensitive reaction on the change of raw materials such as sand aggregates. If the polycarboxylate water reducer occupies the sites for adsorbing harmful components before the polycarboxylate water reducer generates the water reducing effect after the sensitizer is added, the probability of the polycarboxylate water reducer being adsorbed by the harmful components is reduced, the effect of the polycarboxylate water reducer is fully exerted, and the water reducing rate of the polycarboxylate water reducer can be improved. The desensitizer can reduce the negative influence of the sensitivity of the polycarboxylate water reducer in the concrete production, solve the problem that the admixture is excessively doped or is less doped in the concrete production process, and enable the newly mixed concrete to have high fluidity without bleeding, thereby reducing the sensitivity of the polycarboxylate water reducer, enabling the polycarboxylate water reducer-doped concrete to easily have good cohesiveness, fluidity, workability and dispersibility under complex raw material environment, thereby improving the cement concrete production stability, reducing the probability of unqualified concrete treatment and improving the concrete production strength.
Disclosure of Invention
The invention aims to provide a polycarboxylic acid desensitizer to solve the technical problem of reduced water reduction rate caused by the sensitivity of a polycarboxylic acid water reducer.
Another object of the present invention is to provide a method for preparing a polycarboxylic acid desensitizer.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the polycarboxylic acid desensitizer is a mixed solution with concentration of 30-60% formed by dissolving a mixture A in a solvent B, wherein the mixture A comprises the following components in parts by weight: 15-30 parts of polyethylene glycol, 25-35 parts of dimethyl diallyl ammonium chloride, 5-15 parts of sodium hexametaphosphate, 0-5 parts of sodium tripolyphosphate, 25-40 parts of lignosulfonate and 0-5 parts of sodium sulfate.
Further, the solvent B is water.
Further, when the molecular weight of the polyethylene glycol is 1000, 15-20 parts by weight of polyethylene glycol; 20-25 parts by weight of polyethylene glycol when the molecular weight of the polyethylene glycol is 1500; when the molecular weight of the polyethylene glycol is 2000, 25-30 parts by weight of polyethylene glycol.
Further, the content of the calcium lignosulfonate in the lignosulfonate is 54%.
The preparation method of the polycarboxylic acid desensitizer comprises the following steps: adding polyethylene glycol, dimethyl diallyl ammonium chloride, sodium hexametaphosphate, sodium tripolyphosphate, lignin sulfonate and sodium sulfate into a solvent according to the formula amount, and stirring for 10-15 min at 25-40 ℃.
The invention has the beneficial effects that:
the polycarboxylic acid desensitizer disclosed by the invention has the advantages that polyethylene glycol can enter a clay layer earlier than a polycarboxylic acid water reducer molecule, so that the adsorption of clay to the polycarboxylic acid water reducer is reduced; dimethyl diallyl ammonium chloride is a soil stabilizer with excellent performance and an excellent flocculant, and is mainly used for inhibiting the water absorption expansion of clay; sodium hexametaphosphate is used for enhancing concrete workability and reducing concrete bleeding and segregation; the sodium tripolyphosphate has a certain water reducing effect, so that the slump retaining capacity of concrete is improved, and the setting time is prolonged; the lignosulfonate is a surfactant, so that the reaction speed is high, the concrete becomes softer, and the working performance of the concrete is improved; sodium sulfate is used to improve the early strength of concrete.
According to the polycarboxylic acid desensitizer, a certain amount of polycarboxylic acid desensitizer is doped in the polycarboxylic acid water reducer, so that the problem of insufficient water reducing rate of the polycarboxylic acid water reducer due to the quality change of sandstone aggregate can be solved.
The polycarboxylic acid desensitizer can relieve the phenomenon that the polycarboxylic acid water reducer is insufficient in water reducing rate when the quality of sandstone aggregate changes. The influence of the initial slump of the concrete on the quality and variety change of the sandstone aggregate is relatively large, the content of mud or stone powder is increased, the initial slump can be reduced, and the polycarboxylic acid desensitizer is added into the polycarboxylic acid water reducer, so that the influence of the variety and quality of the sandstone aggregate on the initial slump of the concrete can be reduced.
The polycarboxylic acid desensitizer can inhibit clay expansion and drying shrinkage of sandstone aggregate after being mixed with the polycarboxylic acid water reducer.
According to the polycarboxylic acid desensitizer, the polycarboxylic acid desensitizer is added into the polycarboxylic acid water reducer, so that the adjustment frequency of mixing proportion parameters in the concrete production process can be reduced, the working efficiency is improved, and the polycarboxylic acid desensitizer has positive significance for stabilizing the concrete mixing property.
Detailed Description
The technical solutions of the present invention will be clearly and completely described below by means of specific embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The polycarboxylic acid desensitizer of the embodiment is a mixed solution with the mass concentration of 40% formed by dissolving a mixture A in water, wherein the mixture A is prepared by mixing the following raw materials: 25kg of polyethylene glycol, 30kg of dimethyl diallyl ammonium chloride, 5kg of sodium hexametaphosphate, 2kg of sodium tripolyphosphate, 35kg of lignin sulfonate and 3kg of sodium sulfate. The molecular weight of the polyethylene glycol was 1500.
The preparation method of the polycarboxylic acid desensitizer comprises the following steps: adding 35 ℃ water into the mixture A for dissolution to prepare a mixed solution with the mass concentration of 40%, and stirring the mixed solution for 15min by a stirrer at the speed of 30r/min to obtain the composite material.
After the prepared polycarboxylic acid desensitizer is filled into a separate barrel and transported to a construction site, the polycarboxylic acid desensitizer and a standard polycarboxylic acid high-performance water reducing agent with the LC-PC-BZ mixing amount of 2.0% compounded by Henan Likekoer technology Co., ltd are uniformly mixed according to the ratio of 1:9.
Example 2
The polycarboxylic acid desensitizer of the embodiment is a mixed solution with the mass concentration of 30% formed by dissolving a mixture A in water, wherein the mixture A is prepared by mixing the following raw materials: 30kg of polyethylene glycol, 35kg of dimethyl diallyl ammonium chloride, 5kg of sodium hexametaphosphate and 30kg of lignin sulfonate. The polyethylene glycol has a molecular weight of 2000.
The preparation method of the polycarboxylic acid desensitizer comprises the following steps: adding 25 ℃ water into the mixture A for dissolution to prepare a mixed solution with the mass concentration of 30%, and stirring the mixed solution for 15min by a stirrer at the speed of 30r/min to obtain the composite material.
After the prepared polycarboxylic acid desensitizer is filled into a separate barrel and transported to a construction site, the polycarboxylic acid desensitizer and the slow setting polycarboxylic acid high-performance water reducer with the mixing amount of 2.0% and compounded by Henan Likekoer technology Co., ltd are uniformly mixed according to the ratio of 1:9 for use.
Example 3
The polycarboxylic acid desensitizer of the embodiment is a mixed solution with the mass concentration of 40% formed by dissolving a mixture A in water, wherein the mixture A is prepared by mixing the following raw materials: 15kg of polyethylene glycol, 25kg of dimethyl diallyl ammonium chloride, 15kg of sodium hexametaphosphate, 5kg of lignosulfonate and 5kg of sodium sulfate. The polyethylene glycol has a molecular weight of 1000.
The preparation method of the polycarboxylic acid desensitizer comprises the following steps: adding water at 30deg.C to dissolve the mixture A to obtain 40% mixed solution, and stirring with a stirrer at 30r/min for 15min.
And (3) after the prepared polycarboxylic acid desensitizer is filled into a separate barrel and transported to a construction site, uniformly mixing the polycarboxylic acid desensitizer with a retarding polycarboxylic acid water reducer with the SN-JG mixing amount of 2.0% produced by additive factories of eleventh engineering company of water conservancy and hydropower in China according to a ratio of 1:9.
Example 4
The polycarboxylic acid desensitizer of the embodiment is a mixed solution with the mass concentration of 50% formed by dissolving a mixture A in water, wherein the mixture A is prepared by mixing the following raw materials: 20kg of polyethylene glycol, 35kg of dimethyl diallyl ammonium chloride, 10kg of sodium hexametaphosphate, 5kg of sodium tripolyphosphate, 27kg of lignosulfonate and 3kg of sodium sulfate. The polyethylene glycol has a molecular weight of 1000.
The preparation method of the polycarboxylic acid desensitizer comprises the following steps: adding 35 ℃ water into the mixture A for dissolution to prepare mixed solution with the mass concentration of 50%, and stirring for 10min by using a stirrer at the speed of 30r/min to obtain the composite material.
The prepared polycarboxylic acid desensitizer is filled into a separate barrel and transported to a construction site, and then the polycarboxylic acid concrete is diluted and added into the concrete as an additive. The mixing amount of the polycarboxylic acid desensitizer is 0.1-0.2%.
Example 5
The polycarboxylic acid desensitizer of the embodiment is a mixed solution with the mass concentration of 60% formed by dissolving a mixture A in water, wherein the mixture A is prepared by mixing the following raw materials: 25kg of polyethylene glycol, 35kg of dimethyl diallyl ammonium chloride, 5kg of sodium hexametaphosphate, 5kg of sodium tripolyphosphate, 25kg of lignosulfonate and 5kg of sodium sulfate. The polyethylene glycol has a molecular weight of 1500.
The preparation method of the polycarboxylic acid desensitizer comprises the following steps: adding 35 ℃ water into the mixture A for dissolution to prepare a mixed solution with the mass concentration of 60%, and stirring for 10min by using a stirrer at the speed of 30r/min to obtain the composite material.
The prepared polycarboxylic acid desensitizer is filled into a separate barrel and transported to a construction site, and then the polycarboxylic acid concrete is diluted and added into the concrete as an additive. The mixing amount of the polycarboxylic acid desensitizer is 0.1-0.2%.
Experimental example 1
Quality inspection of polycarboxylic acid desensitizer
The polycarboxylic acid desensitizer in the example 1 is fully and uniformly mixed with the standard polycarboxylic acid high-performance water reducer purchased in the market according to the proportion of 1:9, and in the experimental process, the additive amounts of the standard polycarboxylic acid high-performance water reducer without the polycarboxylic acid desensitizer and the standard polycarboxylic acid high-performance water reducer with the polycarboxylic acid desensitizer are the same. According to the performance test of the polycarboxylic acid high-performance water reducer doped with the polycarboxylic acid desensitizer in concrete admixture (GB 8076-2008), the obtained results are shown in table 1:
table 1 performance test of standard polycarboxylic acid high performance water reducer incorporating polycarboxylic acid desensitizer
The performance detection results of the standard type polycarboxylic acid high-performance water reducer doped with the polycarboxylic acid desensitizer are shown in table 1, after the polycarboxylic acid desensitizer is added into the standard type polycarboxylic acid high-performance water reducer, the water reducing rate of the standard type polycarboxylic acid high-performance water reducer is obviously improved, and the bleeding rate, the air content, the slump within 1h and the shrinkage ratio of concrete are obviously reduced. The polycarboxylic acid desensitizer is proved to meet the technical requirements.
Experimental example 2
Anti-sensitization experiment of polycarboxylic acid desensitizer
According to the test method of concrete admixture (GB 8076-2008), under the condition of different raw material qualities, a comparison test is carried out on a standard type polycarboxylic acid high-performance water reducer without a polycarboxylic acid desensitizer and a standard type polycarboxylic acid high-performance water reducer with a polycarboxylic acid desensitizer, wherein the polycarboxylic acid desensitizer is the polycarboxylic acid desensitizer in the example 1, and the polycarboxylic acid desensitizer and the standard type polycarboxylic acid high-performance water reducer with the polycarboxylic acid desensitizer are uniformly mixed according to the ratio of 1:9 and then are used, and in the test process, the addition amounts of the standard type polycarboxylic acid high-performance water reducer without the polycarboxylic acid desensitizer and the standard type polycarboxylic acid high-performance water reducer with the polycarboxylic acid desensitizer are the same. The results of the performance test and the compressive strength test of the obtained concrete mixture are shown in Table 2:
TABLE 2 influence of different raw material qualities on standard type polycarboxylate high-performance water reducer doped with polycarboxylate desensitizer and standard type polycarboxylate high-performance water reducer not doped with polycarboxylate desensitizer
The results of measuring the influence degree of the standard type polycarboxylic acid high-performance water reducer doped with the polycarboxylic acid desensitizer and the standard type polycarboxylic acid high-performance water reducer not doped with the polycarboxylic acid desensitizer on the quality of different raw materials are shown in the table, and the detection results of the standard type polycarboxylic acid high-performance water reducer with the normal numbers J-1, J-3 and J-5 under the quality of different raw materials show that the performance of the standard type polycarboxylic acid high-performance water reducer is greatly changed after the quality of the raw materials is changed. The numbers J-2, J-4 and J-6 are detection results of the standard polycarboxylic acid high-performance water reducer doped with the polycarboxylic acid desensitizer under different raw material qualities, and after the raw material quality changes, the performance change of the standard polycarboxylic acid high-performance water reducer doped with the polycarboxylic acid desensitizer is relatively small.
Experimental example 3
Effect verification
The effect verification is carried out by selecting the prepared polycarboxylic acid desensitizer, the C30F100W6 concrete mixing ratio for the engineering construction of the three-channel green building material project is verified, and the material consumption of the C30F100W6 concrete mixing ratio is shown in the table 3:
table 3 c30f100w6 concrete mix material scale
According to the material dosage of the table 3, concrete mixing is carried out by adopting A, B, C three aggregates according to the non-polycarboxylic acid desensitizer and the polycarboxylic acid desensitizer, and in the experimental process, the additive amounts of A, B, C aggregates without the polycarboxylic acid desensitizer and A, B, C aggregates with the polycarboxylic acid desensitizer are the same. Sample A was an artificial aggregate produced by the company Limited for building materials in Mo Rong, sample B was an artificial aggregate from the company Limited for building materials in Henan Sanjia, and sample C was an artificial aggregate from the company Limited for building materials in Sanjia, new column bridge, and concrete test embodiments are shown in Table 4.
Table 4 concrete test embodiment
The concrete mixtures were tested for performance and mechanical properties according to the test embodiments described above in table 4, with the test results shown in table 5:
TABLE 5 test results of concrete mixture Properties and mechanical Properties
The results of measuring the properties and mechanical properties of the concrete mixture are shown in Table 5, and after the polycarboxylic acid desensitizer is mixed into the standard polycarboxylic acid high-performance water reducer, the sensitivity of the standard polycarboxylic acid high-performance water reducer to the quality change of aggregate can be reduced, and particularly the initial slump sensitivity of the concrete mixture is obviously reduced. The polycarboxylic acid desensitizer is added into the standard polycarboxylic acid high-performance water reducer, so that the adjustment frequency of the mixing ratio parameters in the production process can be reduced, and the working efficiency is improved.
Claims (4)
1. The polycarboxylic acid desensitizer is characterized in that the polycarboxylic acid desensitizer is a mixed solution with the mass concentration of 30-60% formed by dissolving a mixture A in a solvent B, wherein the mixture A comprises the following components in parts by weight: 15-30 parts of polyethylene glycol, 25-35 parts of dimethyl diallyl ammonium chloride, 5-15 parts of sodium hexametaphosphate, 0-5 parts of sodium tripolyphosphate, 25-40 parts of lignosulfonate and 0-5 parts of sodium sulfate; the content of calcium lignosulfonate in the lignosulfonate is 54%.
2. The polycarboxylic acid desensitizing agent according to claim 1, wherein said B solvent is water.
3. The polycarboxylic acid desensitizer according to claim 1 or 2, wherein when the molecular weight of the polyethylene glycol is 1000, the polyethylene glycol is added in an amount of 15-20 parts by weight; when the molecular weight of the polyethylene glycol is 1500, the added amount of the polyethylene glycol is 20-25 parts by weight; when the molecular weight of the polyethylene glycol is 2000, the added amount of the polyethylene glycol is 25-30 parts by weight.
4. The method for preparing the polycarboxylic acid desensitizer according to claim 1, comprising the steps of: adding polyethylene glycol, dimethyl diallyl ammonium chloride, sodium hexametaphosphate, sodium tripolyphosphate, lignin sulfonate and sodium sulfate into a solvent according to the formula amount, and stirring for 10-15 min at 25-40 ℃.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2422323A1 (en) * | 1973-05-09 | 1974-11-21 | Snam Progetti | OIL CONDITIONS THAT PREVENT SLUDGE FORMATION |
| CN104891853A (en) * | 2015-06-05 | 2015-09-09 | 陕西友邦新材料科技有限公司 | Composite anti-mud agent based on polycarboxylate-type pumping agent, anti-mud pumping agent and preparation method of anti-mud pumping agent |
| CN114380528A (en) * | 2021-12-21 | 2022-04-22 | 山西佳维新材料股份有限公司 | Anti-mud agent for concrete and preparation method thereof |
-
2022
- 2022-10-09 CN CN202211227235.5A patent/CN115448633B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2422323A1 (en) * | 1973-05-09 | 1974-11-21 | Snam Progetti | OIL CONDITIONS THAT PREVENT SLUDGE FORMATION |
| CN104891853A (en) * | 2015-06-05 | 2015-09-09 | 陕西友邦新材料科技有限公司 | Composite anti-mud agent based on polycarboxylate-type pumping agent, anti-mud pumping agent and preparation method of anti-mud pumping agent |
| CN114380528A (en) * | 2021-12-21 | 2022-04-22 | 山西佳维新材料股份有限公司 | Anti-mud agent for concrete and preparation method thereof |
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