CN108017308B - Additive for improving strength of building material and preparation method thereof - Google Patents
Additive for improving strength of building material and preparation method thereof Download PDFInfo
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- CN108017308B CN108017308B CN201711014946.3A CN201711014946A CN108017308B CN 108017308 B CN108017308 B CN 108017308B CN 201711014946 A CN201711014946 A CN 201711014946A CN 108017308 B CN108017308 B CN 108017308B
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- building material
- strength
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- stirrer
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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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- 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 discloses an additive for improving the strength of building materials, which consists of the following materials: 2-3 wt% of sodium nitrite; 2-3 wt% of thermoplastic resin; 10-25 wt% of pure acrylic emulsion; 70-80 wt% of polyurethane; low-alkali quick-hardening sulphoaluminate cement: 0.1-0.4 wt%; 1-5 wt% of foam concrete; the sum of the above components is 100%. The invention also discloses a preparation method of the additive for improving the strength of the building material. The additive for improving the strength of the building material provided by the invention introduces sodium nitrite, and the sodium nitrite is matched with the thermoplastic resin, so that the anti-corrosion performance of the additive for improving the strength of the building material is far higher than that of the common additive for improving the strength of the building material, and the additive has more excellent anti-corrosion effect after being used, and the anti-corrosion service life can reach more than 30 years; the addition of the nano-scale low-alkali quick-hardening sulphoaluminate cement makes up the defect of insufficient compactness of the surface of the building material, can bring more excellent matching performance to the building material, solves the problem that bubbles are easily generated in the stirring process of the building material, and provides more excellent construction performance.
Description
Technical Field
The invention relates to an additive for improving the strength of building materials and a preparation method thereof.
Background
The building material admixture is used in the engineering fields of building engineering, bridge engineering, water conservancy engineering, municipal engineering and the like, is a substance which is added in the process of mixing building materials and is used for improving the performance of the building materials, and the adding amount of the building material admixture is not more than 5 percent of the mass of cement according to the regulation of relevant technical standards. The main functions of the building material admixture are to improve the performance of the fresh building material and to enhance the performance of the hardened building material. The additive can effectively improve the performance of the building material and has good economic benefit. Is widely applied in many countries and becomes an indispensable material in building materials. Especially the use of high potency reducing agents. The cement particles can be fully dispersed, the water consumption is greatly reduced, the cement potential is fully exerted, so that the cement stone is relatively compact, the pore structure and the microstructure of an interface area are well improved, and the physical and mechanical properties of the building material are greatly improved.
Therefore, it is an urgent problem to develop an admixture which is easy to operate and has excellent performance in related technical indexes such as adhesion, neutral salt water resistance, neutral salt fog resistance, artificial accelerated aging resistance and the like, and which can improve the strength of building materials.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the additive which has good adhesion, corrosion resistance and other properties, good weather resistance and can improve the strength of the building material.
In order to solve the technical problems, the invention provides the following technical scheme:
the invention relates to an additive for improving the strength of building materials, which consists of the following materials:
preferably, the thermoplastic resin is one or more of thermoplastic acrylic resin, thermoplastic polycarbonate and thermoplastic nylon resin.
Preferably, the pure acrylic emulsion is one or more of propylene glycol methyl ether, dimethyl ester, n-butyl acetate, ethylene glycol methyl ether and ethylene glycol butyl ether acetate.
Preferably, the low-alkali quick-hardening sulphoaluminate cement is an anti-settling agent.
The invention also discloses a preparation method of the additive for improving the strength of the building material, which comprises the following steps:
(1) adding 1/3-2/3 formula amount of pure acrylic emulsion into a reaction kettle;
(2) starting a stirrer, adding the low-alkali quick-hardening sulphoaluminate cement, the thermoplastic resin and the sodium nitrite according to the formula amount, and uniformly stirring;
(3) adding polyurethane according to the formula amount, raising the temperature to 50-60 ℃, stirring, and dispersing at a high speed until the fineness of the coating is less than or equal to 35 um;
(4) reducing the rotating speed of the stirrer, adding the residual pure acrylic emulsion, and uniformly stirring;
(5) adding the foam concrete with the formula amount, reducing the rotating speed, and uniformly stirring to obtain the additive for improving the strength of the building material.
Preferably, in steps (1) to (5), the temperature is controlled to be below 60 ℃ throughout the stirring process.
Preferably, in the step (2), the rotating speed of the stirrer is 400-600 revolutions per minute, and the stirring time is 70-80 minutes.
Preferably, in the step (3), the rotation speed of the stirrer ranges from 1100 to 1200 rpm.
Preferably, in the step (4), the rotation speed of the stirrer is 560-800 rpm, and the stirring time is 40-60 minutes.
Preferably, in the step (5), the rotation speed of the stirrer is 250-500 rpm, and the stirring time is 40-60 minutes.
The invention has the following beneficial effects:
(1) the sodium nitrite is introduced, the sodium nitrite is matched with the thermoplastic resin, the anti-corrosion performance of the additive which is far higher than that of the common additive for improving the strength of the building material is provided, the additive has more excellent anti-corrosion effect after being used, and the anti-corrosion service life can reach more than 30 years;
(2) the addition of the low-alkali quick-hardening sulphoaluminate cement makes up the defect that the surface of the building material is not compact enough, can bring more excellent matching performance to the building material, solves the problem that bubbles are easy to generate in the stirring process of the building material, and provides more excellent construction performance.
Detailed Description
The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is in no way intended to limit the invention.
Example 1
The invention relates to a preparation method of an additive for improving the strength of a building material, which comprises the following steps:
(1) adding 4kg of propylene glycol methyl ether into a reaction kettle;
(2) starting a stirrer, wherein the rotating speed of the stirrer is 400 revolutions per minute, adding 0.1kg of anti-settling agent, 3kg of thermoplastic acrylic resin and 3kg of sodium nitrite, and uniformly stirring for 80 minutes;
(3) adding 80kg of polyurethane, raising the temperature to 60 ℃, stirring at the rotating speed of 1100 r/min by using a stirrer, and dispersing at a high speed until the fineness of the coating is less than 35 um;
(4) reducing the rotating speed of the stirrer to 800 revolutions per minute, adding the residual 6kg of propylene glycol methyl ether, and uniformly stirring, wherein the rotating speed of the stirrer is 560 revolutions per minute, and the stirring time is 60 minutes;
(5) adding 3.9kg of foam concrete, reducing the rotating speed to 500 r/min, and uniformly stirring for 60 min to obtain the additive for improving the strength of the building material.
Example 2
The invention relates to a preparation method of an additive for improving the strength of a building material, which comprises the following steps:
(1) adding 13kg of propylene glycol methyl ether into a reaction kettle;
(2) starting a stirrer, wherein the rotating speed of the stirrer is 600 revolutions per minute, adding 0.4kg of anti-settling agent, 2kg of thermoplastic acrylic resin and 2kg of sodium nitrite, and uniformly stirring for 70 minutes;
(3) adding 70kg of polyurethane, raising the temperature to 50 ℃, stirring at the rotating speed of 1200 rpm of a stirrer, and dispersing at a high speed until the fineness of the coating is less than 35 um;
(4) reducing the rotating speed of the stirrer to 560 revolutions per minute, adding the rest 10kg of propylene glycol methyl ether, and uniformly stirring for 60 minutes;
(5) adding 2.6kg of foam concrete, reducing the rotating speed to 500 r/min, and uniformly stirring for 60 min to obtain the additive for improving the strength of the building material.
The performance indexes of the test are tested according to the example 1 and the example 2 and by selecting the conventional additives on the market as comparison designs, and the results are as follows:
finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The additive for improving the strength of the building material is characterized by comprising the following materials:
the thermoplastic resin is one or more of thermoplastic acrylic resin, thermoplastic polycarbonate and thermoplastic nylon resin.
2. The method for preparing the admixture for improving the strength of the building material according to claim 1, which comprises the following steps:
(1) adding 1/3-2/3 formula amount of pure acrylic emulsion into a reaction kettle;
(2) starting a stirrer, adding the low-alkali quick-hardening sulphoaluminate cement, the thermoplastic resin and the sodium nitrite according to the formula amount, and uniformly stirring;
(3) adding polyurethane according to the formula amount, raising the temperature to 50-60 ℃, stirring, and dispersing at a high speed until the fineness of the coating is less than or equal to 35 um;
(4) reducing the rotating speed of the stirrer, adding the residual pure acrylic emulsion, and uniformly stirring;
(5) adding the foam concrete with the formula amount, reducing the rotating speed, and uniformly stirring to obtain the additive for improving the strength of the building material.
3. The method for preparing an admixture for improving the strength of building materials according to claim 2, wherein the temperature of the whole stirring process is controlled to be below 60 ℃ in the steps (1) to (5).
4. The method for preparing the additive for improving the strength of the building material according to claim 2, wherein in the step (2), the rotating speed of the stirrer is 400-600 rpm, and the stirring time is 70-80 minutes.
5. The method for preparing the admixture for improving the strength of the building material according to claim 2, wherein in the step (3), the rotating speed of the stirrer is 1100-1200 rpm.
6. The method for preparing the admixture for improving the strength of the building material according to claim 2, wherein in the step (4), the rotating speed of the stirrer is 560 to 800 rpm, and the stirring time is 40 to 60 minutes.
7. The method for preparing the admixture for improving the strength of the building material according to claim 2, wherein in the step (5), the rotating speed of the stirrer is 250 to 500 revolutions per minute, and the stirring time is 40 to 60 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711014946.3A CN108017308B (en) | 2017-10-26 | 2017-10-26 | Additive for improving strength of building material and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711014946.3A CN108017308B (en) | 2017-10-26 | 2017-10-26 | Additive for improving strength of building material and preparation method thereof |
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| CN108017308A CN108017308A (en) | 2018-05-11 |
| CN108017308B true CN108017308B (en) | 2020-11-13 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104974611A (en) * | 2014-04-01 | 2015-10-14 | 无锡华东锌盾科技有限公司 | Cold spraying zinc coating and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100503520C (en) * | 2007-09-05 | 2009-06-24 | 浙江大学 | Method for preparing self-antifouling sanitation cement product |
| CN101289298B (en) * | 2008-05-20 | 2012-06-06 | 深圳大学 | Self-repair concrete using urea-formaldehyde resin type high molecule microcapsule and method of manufacture |
| CN103073235B (en) * | 2012-12-28 | 2015-06-24 | 中国铁道科学研究院金属及化学研究所 | Cement-emulsified asphalt mortar for slab tracks in severe cold areas |
| CN103265249B (en) * | 2013-05-23 | 2016-08-10 | 中国铁道科学研究院金属及化学研究所 | A kind of Fast rush-repair mortar for ballastless track filling layer and its preparation method and application |
| US20150119490A1 (en) * | 2013-10-31 | 2015-04-30 | Hercules Incorporated | Dry mortar and emulsion/dispersion based compositions |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104974611A (en) * | 2014-04-01 | 2015-10-14 | 无锡华东锌盾科技有限公司 | Cold spraying zinc coating and preparation method thereof |
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