CN113831059B - Additive for cement products - Google Patents
Additive for cement products Download PDFInfo
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- CN113831059B CN113831059B CN202111330367.6A CN202111330367A CN113831059B CN 113831059 B CN113831059 B CN 113831059B CN 202111330367 A CN202111330367 A CN 202111330367A CN 113831059 B CN113831059 B CN 113831059B
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- parts
- cellulose ether
- cement
- silicon dioxide
- nano silicon
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Classifications
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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
- C04B2103/60—Agents for protection against chemical, physical or biological attack
- C04B2103/603—Agents for controlling alkali-aggregate reactions
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- 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
Abstract
The invention discloses an additive for cement products, which is prepared from the following raw materials: activated carbon powder, modified nano silicon dioxide, oxalic acid, micro silicon powder, acetophenone, hydroxyethyl acrylate and aluminum sulfate; the preparation method of the modified nano silicon dioxide comprises the following steps: mixing nano silicon dioxide, sodium dodecyl benzene sulfonate and silane under the condition of a catalyst, and reacting for 0.5-1.5h at the temperature of 65-70 ℃ and the rotating speed of 400-450 r/min. The additive provided by the invention has the advantages that all raw material components play a synergistic and complementary role, and under the condition that the performances of cement mortar and concrete cement-based materials are not reduced or improved to some extent, the alkali efflorescence resistance and the durability of cement base materials are obviously improved. The early-stage whiskering degree and the secondary whiskering degree are effectively reduced; the compactness of the cement is improved, the early shrinkage is reduced, and the later strength is improved. The quality and the appearance of the building are greatly improved, and the maintenance cost of the building is reduced.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to an additive for cement products.
Background
In building materials or building beautification engineering, the common cementing material is cement, and the building materials after the cement are used have the problem that a layer of white substances are often seen on the surfaces of concrete, baked bricks, stone slabs, ceramic tiles and the like, and the phenomenon is flashing. The method is used for landscape architecture or wall decoration materials, and once the whiskering occurs, the appearance is seriously affected, and adverse effects are caused on the facade impression effect of the building and the quality assessment grade of the impression of the whole landscape architecture engineering.
The whiskering is a common problem in the coating of inner and outer wall paint, and after whiskering, paint films have obvious defects of color change, fading, powder falling, flowering and the like, namely, the hardness of the wall body is influenced, the beauty of the wall body is also influenced, and if the whiskering of the wall body is not treated for a long time, the damage of the structure is gradually accelerated to endanger the safety. In the building, blank room can directly separate out, and decoration is finished, and coating paint and the like can bulge, peel and fall off. Does not fade for a long time and seriously affects the appearance.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.
Disclosure of Invention
The invention aims to provide an additive for cement products, thereby overcoming the defect of serious alkali efflorescence of the existing building mortar.
In order to achieve the above purpose, the invention provides an additive for cement products, which is mainly prepared from the following raw materials: activated carbon powder, modified nano silicon dioxide, oxalic acid, micro silicon powder, acetophenone, hydroxyethyl acrylate and aluminum sulfate; the preparation method of the modified nano silicon dioxide comprises the following steps: mixing nano silicon dioxide, sodium dodecyl benzene sulfonate and silane under the condition of a catalyst, and reacting for 0.5-1.5h at the temperature of 65-70 ℃ and the rotating speed of 400-450 r/min.
Preferably, in the above technical scheme, the admixture for cement products is mainly prepared from the following raw materials in parts by weight: 18-25 parts of active carbon powder, 3-12 parts of modified nano silicon dioxide, 1-4 parts of oxalic acid, 8-17 parts of silica fume powder, 2-6 parts of acetophenone, 1-5 parts of hydroxyethyl acrylate and 6-13 parts of aluminum sulfate.
Preferably, in the above technical solution, the catalyst is nitric acid or hydrochloric acid.
Preferably, in the above technical scheme, the silane is methyltrimethoxysilane or hexadecyltrimethylsilane.
Preferably, in the above technical solution, the additive for cement products further includes: cellulose ether, boric acid, kaolin, zeolite powder, sodium tripolyphosphate, hydroxyethyl acrylate, calcium sulfonate, and calcium formate.
Preferably, in the above technical solution, the additive for cement products further comprises, in parts by weight: 1-5 parts of cellulose ether, 3-7 parts of boric acid, 10-20 parts of kaolin, 12-24 parts of zeolite powder, 2-8 parts of sodium tripolyphosphate, 1-3 parts of hydroxyethyl acrylate, 8-17 parts of calcium sulfonate and 6-17 parts of calcium formate.
Preferably, in the above technical solution, the cellulose ether is one or more of methyl cellulose ether, carboxymethyl cellulose ether, carboxypropyl methyl cellulose ether and carboxyethyl cellulose ether.
Preferably, in the above technical scheme, the mixing amount of the admixture is 0.5-3% of the mass of the cement in the use process.
Compared with the prior art, the invention has the following beneficial effects: the additive for cement products has synergistic and complementary effects of the raw material components, and can obviously improve the alkali efflorescence resistance and the durability of cement base materials under the condition of ensuring that the performances of cement mortar and concrete cement base materials are not reduced or improved to some extent. The early-stage whiskering degree and the secondary whiskering degree are effectively reduced; the compactness of the cement is improved, the early shrinkage is reduced, and the later strength is improved. The quality and the appearance of the building are greatly improved, and the maintenance cost of the building is reduced.
Detailed Description
The following detailed description of the present invention is made in connection with specific examples, but it should be understood that the scope of the invention is not limited by the specific examples.
Example 1
An additive for cement products is mainly prepared from the following raw materials: 23 parts of activated carbon powder, 7 parts of modified nano silicon dioxide, 3 parts of oxalic acid, 13 parts of silica fume powder, 4 parts of acetophenone, 2 parts of hydroxyethyl acrylate, 9 parts of aluminum sulfate, 2 parts of cellulose ether, 5 parts of boric acid, 16 parts of kaolin, 17 parts of zeolite powder, 4 parts of sodium tripolyphosphate, 2 parts of hydroxyethyl acrylate, 12 parts of calcium sulfonate and 15 parts of calcium formate.
The preparation method of the modified nano silicon dioxide comprises the following steps: under the condition of a catalyst, mixing nano silicon dioxide, sodium dodecyl benzene sulfonate and silane, and reacting for 1h at 70 ℃ at the rotating speed of 430 r/min. The catalyst is nitric acid or hydrochloric acid. The silane is methyltrimethoxysilane.
The cellulose ether is a mixture of methyl cellulose ether and carboxyethyl cellulose ether, and the mass ratio of the mixture is 1:1.
In the using process, the mixing amount of the additive is 1.5% of the mass of the cement.
Example 2
An additive for cement products is mainly prepared from the following raw materials: 18 parts of activated carbon powder, 3 parts of modified nano silicon dioxide, 1 part of oxalic acid, 17 parts of silica fume powder, 2 parts of acetophenone, 5 parts of hydroxyethyl acrylate, 6 parts of aluminum sulfate, 5 parts of cellulose ether, 3 parts of boric acid, 20 parts of kaolin, 12 parts of zeolite powder, 2 parts of sodium tripolyphosphate, 3 parts of hydroxyethyl acrylate, 8 parts of calcium sulfonate and 17 parts of calcium formate.
The preparation method of the modified nano silicon dioxide comprises the following steps: under the condition of a catalyst, mixing nano silicon dioxide, sodium dodecyl benzene sulfonate and silane, and reacting for 1.5h at the temperature of 65 ℃ at the rotating speed of 400 r/min. The catalyst is hydrochloric acid. The silane is hexadecyltrimethylsilane.
The cellulose ether is carboxymethyl cellulose ether.
In the using process, the mixing amount of the additive is 0.5 percent of the mass of the cement.
Example 3
An additive for cement products is mainly prepared from the following raw materials: 25 parts of activated carbon powder, 12 parts of modified nano silicon dioxide, 4 parts of oxalic acid, 8 parts of silica fume powder, 6 parts of acetophenone, 1 part of hydroxyethyl acrylate, 13 parts of aluminum sulfate, 1 part of cellulose ether, 7 parts of boric acid, 10 parts of kaolin, 24 parts of zeolite powder, 8 parts of sodium tripolyphosphate, 1 part of hydroxyethyl acrylate, 17 parts of calcium sulfonate and 6 parts of calcium formate.
The preparation method of the modified nano silicon dioxide comprises the following steps: under the condition of a catalyst, mixing nano silicon dioxide, sodium dodecyl benzene sulfonate and silane, and reacting for 0.5h at 70 ℃ at the rotating speed of 450 r/min. The catalyst is nitric acid. The silane is methyltrimethoxysilane.
The cellulose ether is methyl cellulose ether and carboxypropyl methyl cellulose ether, and the mass ratio of the mixture is 1:1.
In the use process, the mixing amount of the additive is 3% of the mass of the cement.
Example 4
An additive for cement products is mainly prepared from the following raw materials: 25 parts of activated carbon powder, 10 parts of modified nano silicon dioxide, 2 parts of oxalic acid, 15 parts of silica fume powder, 4 parts of acetophenone, 5 parts of hydroxyethyl acrylate, 6 parts of aluminum sulfate, 2 parts of cellulose ether, 5 parts of boric acid, 14 parts of kaolin, 15 parts of zeolite powder, 4 parts of sodium tripolyphosphate, 2 parts of hydroxyethyl acrylate, 8 parts of calcium sulfonate and 11 parts of calcium formate.
The preparation method of the modified nano silicon dioxide comprises the following steps: under the condition of a catalyst, mixing nano silicon dioxide, sodium dodecyl benzene sulfonate and silane, and reacting for 1h at the temperature of 65 ℃ at the rotating speed of 400 r/min. The catalyst is nitric acid. The silane is methyltrimethoxysilane.
The cellulose ether is methyl cellulose ether.
In the using process, the mixing amount of the additive is 0.9% of the mass of the cement.
Example 5
An additive for cement products is mainly prepared from the following raw materials: 24 parts of activated carbon powder, 9 parts of modified nano silicon dioxide, 2 parts of oxalic acid, 13 parts of silica fume powder, 2 parts of acetophenone, 4 parts of hydroxyethyl acrylate, 11 parts of aluminum sulfate, 2 parts of cellulose ether, 7 parts of boric acid, 20 parts of kaolin, 16 parts of zeolite powder, 4 parts of sodium tripolyphosphate, 3 parts of hydroxyethyl acrylate, 13 parts of calcium sulfonate and 12 parts of calcium formate.
The preparation method of the modified nano silicon dioxide comprises the following steps: under the condition of a catalyst, mixing nano silicon dioxide, sodium dodecyl benzene sulfonate and silane, and reacting for 1h at the temperature of 65 ℃ at the rotating speed of 400 r/min. The catalyst is hydrochloric acid. The silane is hexadecyltrimethylsilane.
The cellulose ether is carboxyethyl cellulose ether.
In the using process, the mixing amount of the additive is 2.3 percent of the mass of the cement.
Comparative example 1
An additive for cement products is mainly prepared from the following raw materials: 23 parts of activated carbon powder, 3 parts of oxalic acid, 13 parts of silica fume powder, 4 parts of acetophenone, 2 parts of hydroxyethyl acrylate, 9 parts of aluminum sulfate, 2 parts of cellulose ether, 5 parts of boric acid, 16 parts of kaolin, 17 parts of zeolite powder, 4 parts of sodium tripolyphosphate, 2 parts of hydroxyethyl acrylate, 12 parts of calcium sulfonate and 15 parts of calcium formate.
The cellulose ether is a mixture of methyl cellulose ether and carboxyethyl cellulose ether, and the mass ratio of the mixture is 1:1.
In the using process, the mixing amount of the additive is 1.5% of the mass of the cement.
Comparative example 2
An additive for cement products is mainly prepared from the following raw materials: 23 parts of activated carbon powder, 7 parts of silicon dioxide, 3 parts of oxalic acid, 13 parts of silica fume powder, 4 parts of acetophenone, 2 parts of hydroxyethyl acrylate, 9 parts of aluminum sulfate, 2 parts of cellulose ether, 5 parts of boric acid, 16 parts of kaolin, 17 parts of zeolite powder, 4 parts of sodium tripolyphosphate, 2 parts of hydroxyethyl acrylate, 12 parts of calcium sulfonate and 15 parts of calcium formate.
The cellulose ether is a mixture of methyl cellulose ether and carboxyethyl cellulose ether, and the mass ratio of the mixture is 1:1.
In the using process, the mixing amount of the additive is 1.5% of the mass of the cement.
Comparative example 3
An additive for cement products is mainly prepared from the following raw materials: 3 parts of oxalic acid, 4 parts of acetophenone, 2 parts of hydroxyethyl acrylate, 9 parts of aluminum sulfate, 2 parts of cellulose ether, 16 parts of kaolin, 17 parts of zeolite powder, 2 parts of hydroxyethyl acrylate, 12 parts of calcium sulfonate and 15 parts of calcium formate.
The cellulose ether is a mixture of methyl cellulose ether and carboxyethyl cellulose ether, and the mass ratio of the mixture is 1:1.
In the using process, the mixing amount of the additive is 1.5% of the mass of the cement.
Comparative example 4
An additive for cement products is mainly prepared from the following raw materials: 7 parts of modified silicon dioxide, 13 parts of silica fume powder, 2 parts of hydroxyethyl acrylate, 9 parts of aluminum sulfate, 2 parts of cellulose ether, 16 parts of kaolin, 17 parts of zeolite powder, 2 parts of hydroxyethyl acrylate, 12 parts of calcium sulfonate and 15 parts of calcium formate.
The preparation method of the modified nano silicon dioxide comprises the following steps: under the condition of a catalyst, mixing nano silicon dioxide, sodium dodecyl benzene sulfonate and silane, and reacting for 1h at 70 ℃ at the rotating speed of 430 r/min. The catalyst is nitric acid or hydrochloric acid. The silane is methyltrimethoxysilane.
The cellulose ether is a mixture of methyl cellulose ether and carboxyethyl cellulose ether, and the mass ratio of the mixture is 1:1.
In the using process, the mixing amount of the additive is 1.5% of the mass of the cement.
Comparative example 5
The comparative example was a blank test, i.e., cement, with no additive added.
The performance test methods of the wall body flooding resistant mortar of the above examples and comparative examples refer to JC/T1024-2019 wall body facing mortar standard, and the performance test is shown in Table 1.
The foregoing descriptions of specific exemplary embodiments of the present invention are presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application to thereby enable one skilled in the art to make and utilize the invention in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (4)
1. The additive for the cement product is characterized by being prepared from the following raw materials in parts by weight: 18-25 parts of activated carbon powder, 3-12 parts of modified nano silicon dioxide, 1-4 parts of oxalic acid, 8-17 parts of silica fume powder, 2-6 parts of acetophenone, 1-5 parts of hydroxyethyl acrylate, 6-13 parts of aluminum sulfate, 1-5 parts of cellulose ether, 3-7 parts of boric acid, 10-20 parts of kaolin, 12-24 parts of zeolite powder, 2-8 parts of sodium tripolyphosphate, 1-3 parts of hydroxyethyl acrylate, 8-17 parts of calcium sulfonate and 6-17 parts of calcium formate;
the preparation method of the modified nano silicon dioxide comprises the following steps: mixing nano silicon dioxide, sodium dodecyl benzene sulfonate and silane under the condition of nitric acid or hydrochloric acid, and reacting for 0.5-1.5h at the temperature of 65-70 ℃ and the rotating speed of 400-450 r/min.
2. The admixture for cement products according to claim 1, wherein the silane is methyltrimethoxysilane or cetyltrimethylsilane.
3. The admixture for cement products according to claim 1, wherein the cellulose ether is one or more of methyl cellulose ether, carboxymethyl cellulose ether, carboxypropyl methyl cellulose ether or carboxyethyl cellulose ether.
4. An admixture for cement products according to any one of claims 1 to 3, wherein the admixture is incorporated in an amount of 0.5 to 3% by mass of cement during use.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111330367.6A CN113831059B (en) | 2021-11-11 | 2021-11-11 | Additive for cement products |
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| CN202111330367.6A CN113831059B (en) | 2021-11-11 | 2021-11-11 | Additive for cement products |
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| CN113831059B true CN113831059B (en) | 2023-05-09 |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB919322A (en) * | 1960-06-09 | 1963-02-20 | Albright & Wilson Mfg Ltd | Manufacture of aluminous cement |
| CN103613347B (en) * | 2013-12-10 | 2015-11-18 | 广东龙马化学有限公司 | Waterproof ceramic tile adhesive material |
| CN104761939B (en) * | 2015-04-28 | 2017-07-25 | 重庆兴渝涂料股份有限公司 | A kind of stone surface protection nano coating and its manufacture craft |
| CN109208766A (en) * | 2018-08-30 | 2019-01-15 | 上海建为历保科技股份有限公司 | Accumulation of salt in the surface soil method after one kind prevents historical building clean water brick wall from repairing |
| CN111518456B (en) * | 2020-06-04 | 2021-10-19 | 广西正泓新材料有限公司 | Permeable waterproof alkali-resistant coating and preparation method thereof |
| CN111548101B (en) * | 2020-06-29 | 2022-05-13 | 广东平坦适环保材料有限公司 | Cement-based efficient permeable crystallization type waterproof material and preparation method thereof |
| CN112897926A (en) * | 2021-02-23 | 2021-06-04 | 佳木斯市松江水泥有限公司 | Saltpetering inhibitor for portland cement |
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Effective date of registration: 20230418 Address after: 300402 South of Jiuyuan Road, Liumazhuang Village, Dazhangzhuang Town, Beichen District, Tianjin Applicant after: TIANJIN FEILONG CONCRETE ADMIXTURES Co.,Ltd. Address before: 530000 room 1-0713, building 1, dongkai International Commercial Plaza, No. 9, Liyuan Road, XiXiangTang District, Nanning City, Guangxi Zhuang Autonomous Region Applicant before: Guangxi Hanhua Architectural Design Co.,Ltd. |
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