CN113943140A - Preparation method of water-resistant desulfurization building gypsum product - Google Patents
Preparation method of water-resistant desulfurization building gypsum product Download PDFInfo
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- CN113943140A CN113943140A CN202111163588.9A CN202111163588A CN113943140A CN 113943140 A CN113943140 A CN 113943140A CN 202111163588 A CN202111163588 A CN 202111163588A CN 113943140 A CN113943140 A CN 113943140A
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- water
- building gypsum
- resistant
- desulfurized
- desulfurized building
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
- C04B28/142—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/144—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
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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
- C04B40/02—Selection of the hardening environment
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides a preparation method of a water-resistant desulfurized building gypsum product, which comprises the following steps: preparing raw materials, mixing, preparing a waterproof agent solution, adding a waterproof agent, uniformly mixing and oxidizing. The preparation method of the water-resistant desulfurized building gypsum provided by the invention can be used for preparing a water-resistant desulfurized building gypsum product with good performance, and is convenient to prepare, convenient to obtain materials and wide in material source.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a preparation method of a water-resistant desulfurized building gypsum product.
Background
The desulfurized gypsum is an industrial byproduct obtained in the process of recovering sulfur dioxide in a thermal power plant, and according to the annual report of solid waste control issued by the ministry of ecological environment, the yield of the desulfurized gypsum in China in 2018 reaches 1.2 hundred million tons. At present, the desulfurized gypsum is mainly used for heating to prepare desulfurized building gypsum, and building gypsum products such as gypsum plates and the like are prepared by adopting the desulfurized building gypsum, but the building gypsum is an air-setting cementing material, and the application range of the desulfurized building gypsum is greatly limited by the property. If the water resistance of the product can be improved, the application range of the desulfurized gypsum product can be greatly expanded, the utilization of the desulfurized gypsum is further promoted, the storage of solid wastes is reduced, and the method has great economic benefits and social benefits.
At present, methods for improving water resistance mainly include coating, adding inorganic materials or organic materials, and the like. The coating method is simple and easy to implement, but the coating layer is easy to peel off, so that the water resistance effect is influenced. The cement in the inorganic material is one of the materials which are frequently added and used for improving the water resistance of the gypsum, the generated hydrated calcium silicate and hydrated calcium aluminate are used for filling the pores of the gypsum to improve the compactness, so that the strength and the water resistance of the gypsum are improved, but the excessive volume expansion of the hydrated calcium sulphoaluminate generated by the reaction of the cement and the gypsum can cause the cracking of a product. Water-proofing agents enhance the water resistance of gypsum, but at the same time reduce the strength of the gypsum.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
FIG. 1 is a pictorial representation of a desulfurized building gypsum product made in example 3;
FIG. 2 is a cross-sectional view of a water-resistant desulfurized building gypsum product made in example 3.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
The present invention has been made in view of the above and/or other problems associated with the prior art water resistant desulfurized gypsum building products.
Therefore, one of the purposes of the invention is to overcome the defects of the existing products and provide a preparation method of a water-resistant desulfurized building gypsum product.
To solve the above technical problem, according to an aspect of the present invention, the present invention provides the following technical solutions: a preparation method of a water-resistant desulfurized building gypsum product comprises the following steps:
preparing raw materials: preparing raw materials of desulfurized building gypsum, nano calcium silicate hydrate powder, cement, fly ash, lime and a waterproof agent;
mixing: mixing and stirring the prepared desulfurized building gypsum, nano calcium silicate hydrate powder, cement, fly ash and lime uniformly to prepare a mixed solution;
preparing a waterproof agent solution: uniformly mixing a waterproof agent and water to prepare a waterproof agent solution;
adding a waterproof agent and uniformly mixing: uniformly mixing and stirring the waterproof agent solution and the mixed solution;
and (3) oxidation: and introducing the mixed waterproof agent solution and the mixed solution into a mold, and oxidizing to obtain the product.
As a preferable scheme of the preparation method of the water-resistant desulfurized building gypsum product, the method comprises the following steps: preparing raw materials, namely, desulfurizing building gypsum: nano calcium silicate hydrate powder: cement: fly ash: lime: the water repellent is 90-110: 1-5: 3-7: 7-11: 1-3: 0.1-0.6.
As a preferable scheme of the preparation method of the water-resistant desulfurized building gypsum product, the method comprises the following steps: preparing raw materials, namely, desulfurizing building gypsum: nano calcium silicate hydrate powder: cement: fly ash: lime: 100 parts of waterproof agent: 3: 5: 9: 2: 0.4.
as a preferable scheme of the preparation method of the water-resistant desulfurized building gypsum product, the method comprises the following steps: in the preparation of the raw materials, the cement is portland cement.
As a preferable scheme of the preparation method of the water-resistant desulfurized building gypsum product, the method comprises the following steps: in the mixing process, the desulfurized building gypsum, the nano calcium silicate hydrate powder, the cement, the fly ash and the lime are put into a container and mixed together.
As a preferable scheme of the preparation method of the water-resistant desulfurized building gypsum product, the method comprises the following steps: the stirring speed during mixing was 100rpm, and the stirring time was 30 min.
As a preferable scheme of the preparation method of the water-resistant desulfurized building gypsum product, the method comprises the following steps: the kind of the water repellent agent solution is as follows.
As a preferable scheme of the preparation method of the water-resistant desulfurized building gypsum product, the method comprises the following steps: the water-proof agent solution has the water-material ratio of the water-proof agent to water of 0.53.
As a preferable scheme of the preparation method of the water-resistant desulfurized building gypsum product, the method comprises the following steps: adding a waterproof agent and uniformly mixing, wherein the stirring speed of the added waterproof agent solution is 200 people's skin, and the stirring time is 2 min.
As a preferable scheme of the preparation method of the water-resistant desulfurized building gypsum product, the method comprises the following steps: during oxidation, pouring the mixture into a mold, wherein the oxidation is natural oxidation, and the time of the natural oxidation is 2h
The invention provides a preparation method of water-resistant desulfurized building gypsum, which is characterized in that desulfurized building gypsum is used for further processing, a finished product of water-resistant desulfurized building gypsum with good performance is provided, the preparation steps are convenient, the used raw materials are common raw materials in the field, the materials are convenient to obtain, and the sources are wide.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, specific embodiments thereof are described in detail below with reference to examples of the specification.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. The following examples are set forth to enable those skilled in the art to practice the invention.
Example 1
Preparing desulfurized building gypsum, nano calcium silicate hydrate powder, cement, fly ash and lime powder according to a proportion, wherein the desulfurized building gypsum is dried for 3 hours in a drying oven at 160 ℃, and the primary particle size of the calcium silicate hydrate powder is 50 nm; the cement is Portland cement, the initial setting time is 165min, and the final setting time is 260 min; the fly ash is I-grade fly ash, the lime is quicklime, and the waterproof agent is colorless liquid.
The raw materials are as follows by weight: desulfurization building gypsum: nano calcium silicate hydrate powder: cement: fly ash: lime: 100 parts of waterproof agent: 3: 5: 9: 2: 0.4.
mixing desulfurized building gypsum, nano calcium silicate hydrate powder, cement, fly ash and lime powder;
stirring the mixed desulfurized building gypsum and nano calcium silicate powder, cement, fly ash and lime powder for 3min to uniformly mix the desulfurized building gypsum and the nano calcium silicate powder;
mixing the waterproof agent with water, and uniformly stirring to obtain a waterproof agent solution;
and (3) mixing and stirring the waterproof agent solution and the mixed desulfurized building gypsum, nano calcium silicate powder, cement, fly ash and lime powder for 3min, introducing the stirred slurry into a mold, and naturally oxidizing the product for 7 d.
Example 2
The embodiment provides a preparation method of a water-resistant desulfurized building gypsum product, which comprises the following raw materials by mass: desulfurization building gypsum: nano calcium silicate hydrate powder: cement: fly ash: lime: 100 parts of waterproof agent: 3: 5: 9: 2: 0.4.
the water-resistant desulfurized building gypsum product in the embodiment is prepared by the following steps:
preparing raw materials: placing the desulfurized building gypsum in a drying oven, drying for 3h at 160 ℃ to prepare calcium silicate hydrate, wherein the primary particle size of calcium silicate hydrate powder is 50nm, the cement is restricted to be Portland cement, the initial setting time is 165min, the final setting time is 260min, the fly ash is I-grade fly ash, lime is quicklime, and the waterproof agent is colorless liquid.
Pouring the prepared raw materials into a container according to the mass ratio for mixing, stirring the raw materials in the container at the rotating speed of 100rpm for 3min to uniformly mix the raw materials, weighing 0.5% of the composite organic silicon waterproof agent, weighing 0.53% of the set water-material ratio, adding the waterproof agent into water, uniformly stirring, pouring the waterproof agent solution into the stirred powder material, continuously stirring at the speed of 200rpm for 2min, pouring the stirred slurry into a mold, and naturally oxidizing the product for 7 d.
Example 3
The desulfurized building gypsum prepared in example 2 was tested for compressive strength according to GB-T17669.3-1999 and the desulfurized building gypsum prepared in example 2 was tested for compressive strength of 6.2 MPa.
The compression softening coefficient of the gypsum product is calculated by using the desulfurized building gypsum prepared in the example 2 according to the method for calculating the softening coefficient of the JCT 698-2010 gypsum block, and the desulfurized building gypsum prepared in the example 2 is measured to be 0.86.
According to the data, the desulfurized building gypsum prepared by the method has good mechanical properties, meets the daily use requirement of the gypsum, and has practical use value and economic benefit.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. A preparation method of a water-resistant desulfurized building gypsum product comprises the following steps:
preparing raw materials: preparing raw materials of desulfurized building gypsum, nano calcium silicate hydrate powder, cement, fly ash, lime and a waterproof agent;
mixing: mixing and stirring the prepared desulfurized building gypsum, nano calcium silicate hydrate powder, cement, fly ash and lime uniformly to prepare a mixed solution;
preparing a waterproof agent solution: uniformly mixing a waterproof agent and water to prepare a waterproof agent solution;
adding a waterproof agent and uniformly mixing: uniformly mixing and stirring the waterproof agent solution and the mixed solution;
and (3) oxidation: and introducing the mixed waterproof agent solution and the mixed solution into a mold, and oxidizing to obtain the product.
2. The method of making a water-resistant desulfurized building gypsum product according to claim 1, characterized in that: in the preparation raw materials, the desulfurized building gypsum is as follows by weight: nano calcium silicate hydrate powder: cement: fly ash: lime: the water repellent is 90-110: 1-5: 3-7: 7-11: 1-3: 0.1-0.6.
3. The method of making a water-resistant desulfurized building gypsum product according to claim 2, characterized in that: in the preparation raw materials, the desulfurized building gypsum is as follows by weight: nano calcium silicate hydrate powder: cement: fly ash: lime: 100 parts of waterproof agent: 3: 5: 9: 2: 0.4.
4. the method of making a water-resistant desulfurized building gypsum product according to claim 1, characterized in that: in the preparation raw materials, the cement is portland cement.
5. The method of making a water-resistant desulfurized building gypsum product according to claim 1, characterized in that: in the mixing, the desulfurized building gypsum, the nano calcium silicate hydrate powder, the cement, the fly ash and the lime are put into a container together for mixing.
6. The method of making a water-resistant desulfurized building gypsum product according to claim 5, characterized in that: the stirring speed in the mixing is 100rpm, and the stirring time is 30 min.
7. The method of making a water-resistant desulfurized building gypsum product according to claim 1, characterized in that: the type of the waterproof agent solution is as follows.
8. The method of making a water-resistant desulfurized building gypsum product according to claim 7, characterized in that: the water-proof agent solution is characterized in that the water-material ratio of the water-proof agent to water in the water-proof agent solution is 0.53.
9. The method of making a water-resistant desulfurized building gypsum product according to claim 1, characterized in that: and in the step of uniformly mixing the added waterproofing agent, the stirring speed of the added waterproofing agent solution is 200 people's skin, and the stirring time is 2 min.
10. The method for preparing desulfurized building gypsum food according to claim 1, wherein: and in the oxidation, pouring the mixture into a mold, wherein the oxidation is natural oxidation, and the time of the natural oxidation is 2 hours.
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| CN202111163588.9A CN113943140A (en) | 2021-09-30 | 2021-09-30 | Preparation method of water-resistant desulfurization building gypsum product |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114368923A (en) * | 2022-02-14 | 2022-04-19 | 秦亚琼 | Method for preparing high-strength building gypsum through chemical modification of titanium gypsum |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102674726A (en) * | 2011-03-08 | 2012-09-19 | 上海晋马建材有限公司 | Water-resistance and high-strength desulfurized gypsum powder |
| CN111285654A (en) * | 2020-01-31 | 2020-06-16 | 重庆建筑工程职业学院 | Preparation method of desulfurization building gypsum-based composite cementing material |
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2021
- 2021-09-30 CN CN202111163588.9A patent/CN113943140A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102674726A (en) * | 2011-03-08 | 2012-09-19 | 上海晋马建材有限公司 | Water-resistance and high-strength desulfurized gypsum powder |
| CN111285654A (en) * | 2020-01-31 | 2020-06-16 | 重庆建筑工程职业学院 | Preparation method of desulfurization building gypsum-based composite cementing material |
Non-Patent Citations (2)
| Title |
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| 姚燕: "《水泥与混凝土研究进展：第14届国际水泥化学大会论文综述》", 31 October 2016, 北京：中国建材工业出版社, pages: 112 * |
| 杨磊等: "《脱硫建筑石膏耐水性能研究》", 《硅酸盐通报》, vol. 35, no. 9, 30 September 2016 (2016-09-30), pages 2787 - 2792 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114368923A (en) * | 2022-02-14 | 2022-04-19 | 秦亚琼 | Method for preparing high-strength building gypsum through chemical modification of titanium gypsum |
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