CN113831059A - Admixture for cement products - Google Patents
Admixture for cement products Download PDFInfo
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- CN113831059A CN113831059A CN202111330367.6A CN202111330367A CN113831059A CN 113831059 A CN113831059 A CN 113831059A CN 202111330367 A CN202111330367 A CN 202111330367A CN 113831059 A CN113831059 A CN 113831059A
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- Prior art keywords
- parts
- cellulose ether
- cement
- admixture
- silicon dioxide
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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
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- 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)
Abstract
The invention discloses an additive for cement products, which is mainly prepared from the following raw materials: activated carbon powder, modified 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: under the condition of a catalyst, mixing the nano silicon dioxide, the sodium dodecyl benzene sulfonate and the silane, and reacting for 0.5 to 1.5 hours at the rotating speed of 400-450r/min at the temperature of between 65 and 70 ℃. The additive for cement products of the invention has the synergistic and complementary effects of the raw material components, and can obviously improve the efflorescence resistance and durability of the cement base material under the condition of ensuring that the performances of the cement mortar and the concrete cement base material are not reduced or improved. The early saltpetering degree and the secondary saltpetering degree are effectively reduced; the compactness of the cement is improved, the early shrinkage is reduced, and the later strength is improved. The quality, the aesthetic feeling and the durability of 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 beautifying projects, cement is frequently used as a cementing material, and the building materials using the cement often have the problem that a layer of white substance is often seen on the surfaces of concrete, sintered bricks, stone slabs, ceramic tiles and the like, and is generally in the form of white powder, floccules or flakes, and the phenomenon is saltpetering. The building modifier is used for landscape or wall decoration materials and the like, and once the saltpetering occurs, the appearance is seriously influenced, and the adverse effects are caused on the facade impression effect of a building and the impression quality evaluation grade of the whole garden building engineering.
The whiskering is a common problem in the coating of internal and external wall paints, and after the whiskering, a paint film has obvious defects of color change, color fading, powder falling, flowering and the like, so that the hardness of a wall body is influenced, the beauty of the wall body is also influenced, and the whiskering of the wall body can gradually accelerate the damage of a structure and endangers the safety if the wall body cannot be treated for a long time. In the building, blank rooms can be directly separated out, the decorated blank rooms can be swelled, skinned and peeled off by coating, paint and the like. Does not fade for years 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 skilled in the art.
Disclosure of Invention
The invention aims to provide an additive for cement products, so as to overcome the defect of serious saltpetering of the existing building mortar.
In order to achieve the aim, the invention provides an additive for cement products, which is mainly prepared from the following raw materials: activated carbon powder, modified 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: under the condition of a catalyst, mixing the nano silicon dioxide, the sodium dodecyl benzene sulfonate and the silane, and reacting for 0.5 to 1.5 hours at the rotating speed of 400-450r/min at the temperature of between 65 and 70 ℃.
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 activated carbon powder, 3-12 parts of modified silicon dioxide, 1-4 parts of oxalic acid, 8-17 parts of wollastonite powder, 2-6 parts of acetophenone, 1-5 parts of hydroxyethyl acrylate and 6-13 parts of aluminum sulfate.
Preferably, in the above technical scheme, 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 admixture for cement products further comprises: cellulose ether, boric acid, kaolin, zeolite powder, sodium tripolyphosphate, hydroxyethyl acrylate, calcium sulfonate and calcium formate.
Preferably, in the above technical solution, the admixture 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 or carboxyethyl cellulose ether.
Preferably, in the technical scheme, in the using process, the adding amount of the additive is 0.5-3% of the mass of the cement.
Compared with the prior art, the invention has the following beneficial effects: the additive for cement products of the invention has the synergistic and complementary effects of the raw material components, and can obviously improve the efflorescence resistance and durability of the cement base material under the condition of ensuring that the performances of the cement mortar and the concrete cement base material are not reduced or improved. The early saltpetering degree and the secondary saltpetering degree are effectively reduced; the compactness of the cement is improved, the early shrinkage is reduced, and the later strength is improved. The quality, the aesthetic feeling and the durability of 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 will be given with reference to specific examples, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
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 silicon dioxide, 3 parts of oxalic acid, 13 parts of wollastonite 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 ℃ and the rotating speed of 430 r/min. The catalyst is nitric acid or hydrochloric acid. The silane is methyl trimethoxy silane.
The cellulose ether is a mixture of methyl cellulose ether and carboxyethyl cellulose ether, and the mixing mass ratio is 1: 1.
In the using process, the mixing amount of the additive is 1.5 percent 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 silicon dioxide, 1 part of oxalic acid, 17 parts of wollastonite 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 the nano silicon dioxide, the sodium dodecyl benzene sulfonate and the silane, and reacting for 1.5 hours at the rotating speed of 400r/min at the temperature of 65 ℃. 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 silicon dioxide, 4 parts of oxalic acid, 8 parts of wollastonite 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 the nano silicon dioxide, the sodium dodecyl benzene sulfonate and the silane, and reacting for 0.5h at the rotation speed of 450r/min at the temperature of 70 ℃. The catalyst is nitric acid. The silane is methyl trimethoxy silane.
The cellulose ether is methyl cellulose ether and carboxypropyl methyl cellulose ether, and the mixing mass ratio is 1: 1.
In the using process, the mixing amount of the additive is 3 percent 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 silicon dioxide, 2 parts of oxalic acid, 15 parts of wollastonite 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 rotating speed of 400r/min at the temperature of 65 ℃. The catalyst is nitric acid. The silane is methyl trimethoxy silane.
The cellulose ether is methyl cellulose ether.
In the using process, the mixing amount of the additive is 0.9 percent 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 silicon dioxide, 2 parts of oxalic acid, 13 parts of wollastonite 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 rotating speed of 400r/min at the temperature of 65 ℃. 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 wollastonite 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 mixing mass ratio is 1: 1.
In the using process, the mixing amount of the additive is 1.5 percent 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 wollastonite 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 mixing mass ratio is 1: 1.
In the using process, the mixing amount of the additive is 1.5 percent 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 mixing mass ratio is 1: 1.
In the using process, the mixing amount of the additive is 1.5 percent 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 wollastonite 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 ℃ and the rotating speed of 430 r/min. The catalyst is nitric acid or hydrochloric acid. The silane is methyl trimethoxy silane.
The cellulose ether is a mixture of methyl cellulose ether and carboxyethyl cellulose ether, and the mixing mass ratio is 1: 1.
In the using process, the mixing amount of the additive is 1.5 percent of the mass of the cement.
Comparative example 5
The comparative example is a blank test, i.e., cement, with no admixture added.
The performance test method of the wall flooding resistant mortar in the examples and the comparative examples refers to JC/T1024-2019 wall facing mortar standard, and the performance test is shown in Table 1.
The foregoing descriptions of specific exemplary embodiments of the present invention have been 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 certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and 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 (8)
1. An additive for cement products is characterized by being mainly prepared from the following raw materials: activated carbon powder, modified 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: under the condition of a catalyst, mixing the nano silicon dioxide, the sodium dodecyl benzene sulfonate and the silane, and reacting for 0.5 to 1.5 hours at the rotating speed of 400-450r/min at the temperature of between 65 and 70 ℃.
2. The admixture for cement products according to claim 1, characterized in that it is mainly made of the following raw materials in parts by weight: 18-25 parts of activated carbon powder, 3-12 parts of modified silicon dioxide, 1-4 parts of oxalic acid, 8-17 parts of wollastonite powder, 2-6 parts of acetophenone, 1-5 parts of hydroxyethyl acrylate and 6-13 parts of aluminum sulfate.
3. The admixture for cementitious products according to claim 1, characterised in that said catalyst is nitric acid or hydrochloric acid.
4. The admixture for cementitious products as set forth in claim 1 wherein said silane is methyltrimethoxysilane or hexadecyltrimethylsilane.
5. The admixture for cementitious products of claim 1, further comprising: cellulose ether, boric acid, kaolin, zeolite powder, sodium tripolyphosphate, hydroxyethyl acrylate, calcium sulfonate and calcium formate.
6. The admixture for cementitious products of claim 5, characterized in that it 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.
7. The admixture for cement products according to claim 5 wherein the cellulose ether is one or more of methyl cellulose ether, carboxymethyl cellulose ether, carboxypropyl methyl cellulose ether or carboxyethyl cellulose ether.
8. An admixture for cementitious products as claimed in any one of claims 1 to 7, characterised in that, in use, the admixture is present in an amount of from 0.5 to 3% by mass of cement.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| CN113831059A true CN113831059A (en) | 2021-12-24 |
| CN113831059B CN113831059B (en) | 2023-05-09 |
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Citations (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 |
| CN103613347A (en) * | 2013-12-10 | 2014-03-05 | 广东龙马化学有限公司 | Waterproof ceramic tile adhesive material |
| CN104761939A (en) * | 2015-04-28 | 2015-07-08 | 重庆卡勒斯通科技有限公司 | Stone surface protection nano coating and preparing process thereof |
| 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 |
| CN111518456A (en) * | 2020-06-04 | 2020-08-11 | 广西正泓新材料有限公司 | Permeable waterproof alkali-resistant coating and preparation method thereof |
| CN111548101A (en) * | 2020-06-29 | 2020-08-18 | 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 |
-
2021
- 2021-11-11 CN CN202111330367.6A patent/CN113831059B/en active Active
Patent Citations (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 |
| CN103613347A (en) * | 2013-12-10 | 2014-03-05 | 广东龙马化学有限公司 | Waterproof ceramic tile adhesive material |
| CN104761939A (en) * | 2015-04-28 | 2015-07-08 | 重庆卡勒斯通科技有限公司 | Stone surface protection nano coating and preparing process thereof |
| 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 |
| CN111518456A (en) * | 2020-06-04 | 2020-08-11 | 广西正泓新材料有限公司 | Permeable waterproof alkali-resistant coating and preparation method thereof |
| CN111548101A (en) * | 2020-06-29 | 2020-08-18 | 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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| CN113831059B (en) | 2023-05-09 |
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