CN116023108A - High-water-resistance gypsum product and preparation method thereof - Google Patents
High-water-resistance gypsum product and preparation method thereof Download PDFInfo
- Publication number
- CN116023108A CN116023108A CN202211686907.9A CN202211686907A CN116023108A CN 116023108 A CN116023108 A CN 116023108A CN 202211686907 A CN202211686907 A CN 202211686907A CN 116023108 A CN116023108 A CN 116023108A
- Authority
- CN
- China
- Prior art keywords
- gypsum
- gypsum product
- product
- geopolymer
- water resistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010440 gypsum Substances 0.000 title claims abstract description 240
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 240
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 238000002360 preparation method Methods 0.000 title abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 127
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 53
- 229920000876 geopolymer Polymers 0.000 claims abstract description 48
- 239000002002 slurry Substances 0.000 claims abstract description 38
- 239000000203 mixture Substances 0.000 claims abstract description 33
- 238000003756 stirring Methods 0.000 claims abstract description 21
- 239000002440 industrial waste Substances 0.000 claims abstract description 19
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910001948 sodium oxide Inorganic materials 0.000 claims abstract description 16
- 238000002156 mixing Methods 0.000 claims abstract description 12
- 229920000642 polymer Polymers 0.000 claims abstract description 12
- 238000000465 moulding Methods 0.000 claims abstract description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 27
- 239000000843 powder Substances 0.000 claims description 21
- 239000002893 slag Substances 0.000 claims description 21
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 18
- 239000010881 fly ash Substances 0.000 claims description 17
- 229920005646 polycarboxylate Polymers 0.000 claims description 16
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 14
- 239000012190 activator Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 11
- 239000004115 Sodium Silicate Substances 0.000 claims description 10
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 239000004576 sand Substances 0.000 claims description 9
- 235000019353 potassium silicate Nutrition 0.000 claims description 8
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 7
- 235000019795 sodium metasilicate Nutrition 0.000 claims description 7
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 235000017550 sodium carbonate Nutrition 0.000 claims 1
- 235000011121 sodium hydroxide Nutrition 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract description 13
- 239000004566 building material Substances 0.000 abstract description 8
- 238000005034 decoration Methods 0.000 abstract description 8
- 230000007547 defect Effects 0.000 abstract description 4
- 239000004568 cement Substances 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 9
- 239000004570 mortar (masonry) Substances 0.000 description 7
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 6
- 102000004169 proteins and genes Human genes 0.000 description 6
- 108090000623 proteins and genes Proteins 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 239000008030 superplasticizer Substances 0.000 description 5
- 239000003513 alkali Substances 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000002940 repellent Effects 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Images
Classifications
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a gypsum product with high water resistance and a preparation method thereof, which relate to the technical field of building materials and are used for solving the technical problems of low strength, insufficient water resistance and surface frosting defect of the existing gypsum product; gypsum products with high water resistance include gypsum, geopolymers and water reducers; the geoid polymer is prepared from industrial waste and an alkaline excitant, wherein the alkaline excitant comprises the alkaline substance with the mass fraction of sodium oxide not higher than 2%; a method of making a gypsum product having high water resistance comprising: uniformly mixing gypsum, geopolymer and water reducer to obtain a mixture; adding water into the mixture and uniformly stirring to obtain gypsum slurry; and pouring the gypsum slurry into a mould for molding to obtain the gypsum product. The gypsum product of the invention is suitable for decoration and decoration of buildings, in particular for decoration and decoration of families and houses.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a gypsum product with high water resistance and a preparation method thereof.
Background
Gypsum materials and gypsum products are used in many applications for building finishing and decorating, and are more widely used in the finishing and decorating of homes and residences, in particular. Compared with the traditional cement products, the gypsum products have the characteristics of light texture, quick setting and hardening, good heat preservation and fireproof performance and the like.
The water resistance of a building material is often expressed by a softening factor, which is a degree of retention of strength of the material from a dry state to a saturated state, and the softening factor of the building material is 0.85 or more. If the water resistance of the gypsum product is measured according to the softening coefficient, the strength of the gypsum product is reduced by more than 70% after the gypsum product is exposed to water, namely, the softening coefficient is only 0.2-0.3, and the reduction amplitude is quite obvious. Engineering technicians have been trying to increase the water resistance of gypsum products for many years, and in the prior art, both exterior and interior waterproofing methods have been commonly employed to increase the water resistance of gypsum products. The external waterproof is to coat the surface of the gypsum product with a hydrophobic substance to form a protective film, and the gypsum product loses the waterproof effect when the coating is not brushed or peeled off. The inner waterproof is to mix with water repellent such as organic silicon, paraffin emulsion, stearate and the like in the preparation of gypsum products, and the substances can improve the water resistance coefficient of the gypsum products and obviously reduce the self strength of the gypsum; the cement, slag powder and fly ash are added when the gypsum product is prepared, but the addition of the cement can make the volume of the prepared gypsum product unstable, and the prepared gypsum product has the phenomenon of surface frosting, so that the existing gypsum product has the defects of low strength, insufficient water resistance and surface frosting, and the application range and the field of the existing gypsum product are severely restricted.
Disclosure of Invention
In order to solve the technical problems of low strength, insufficient water resistance and surface frosting return defects of the existing gypsum products, the invention provides a gypsum product with high water resistance and a preparation method thereof.
In a first aspect, the present invention provides a gypsum product having high water resistance, comprising gypsum, a geopolymer and a water reducing agent; the polymer is prepared from industrial waste and an alkaline excitant, wherein the alkaline excitant comprises the alkaline material with the mass fraction of not more than 2% calculated by sodium oxide.
Compared with the prior art, the geopolymer is added into the gypsum and the water reducer, the geopolymer is prepared from industrial waste and an alkaline excitant, wherein the mass fraction of the alkaline excitant calculated by sodium oxide is not higher than 2%, and the mass fraction of the alkaline excitant calculated by sodium oxide in the gypsum product is not higher than 2%, so that the geopolymer is formed in the gypsum preparation; in addition, the invention can effectively solve the problem of frosting return of the gypsum product by controlling the alkaline excitant to be not higher than 2 percent in terms of sodium oxide by mass percent, and can improve the compatibility of each component in the gypsum product, so that each component in the gypsum product has synergistic effect and the strength of the gypsum product is effectively improved; the gypsum product of the invention has good application value and economic value in engineering, and is a low-carbon and green building material.
Preferably, the method comprises the following steps in percentage by weight: 60 to 80 percent of gypsum, 19 to 39 percent of geopolymer and 0.5 to 1.0 percent of water reducer.
Preferably, a retarder is also included; and/or, the retarder is used in an amount of 0.01-0.1% by weight of the gypsum product.
Preferably, further comprising fine aggregate; and/or the fine aggregate is natural sand and/or artificial sand; and/or the use amount of the fine aggregate is 3-5 times of the total mass of the gypsum, the geopolymer and the water reducing agent.
Preferably, the gypsum comprises any one or more of desulfurized gypsum, phosphogypsum and fluorine gypsum.
Preferably, the alkaline activator comprises any one or more of sodium silicate, sodium metasilicate, sodium hydroxide and sodium carbonate.
Preferably, the industrial waste comprises any one or more of slag powder, fly ash, steel slag powder and metakaolin.
Preferably, the retarder is a protein and/or citric retarder; and/or the water reducer is comb-type and/or short-branched polycarboxylate water reducer.
In another aspect, the present invention provides a method of making a gypsum product having high water resistance, comprising:
uniformly mixing the gypsum, the geopolymer and the water reducing agent according to the formula amount to obtain a mixture;
adding water accounting for 30-45 wt% of the mass of the mixture into the mixture, and uniformly stirring to obtain gypsum slurry;
pouring the gypsum slurry into a mould for molding to obtain a gypsum product;
wherein the geopolymer is prepared from industrial waste and an alkaline activator.
Preferably, the gypsum and the geopolymer are uniformly mixed with the water reducer to obtain a mixture, and the mixture comprises the following components:
and uniformly mixing the gypsum, the geopolymer, the water reducer, the retarder and the fine aggregate to obtain the mixture.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
FIG. 1 is a schematic flow chart of a method for preparing a gypsum product according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of another method for preparing a gypsum product according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. The meaning of "a number" is one or more than one unless specifically defined otherwise.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Gypsum products are used in many applications for finishing and decorating buildings, and are used more widely in particular for finishing and decorating domestic dwellings. Compared with traditional cement products, the gypsum products have the characteristics of light texture, quick setting and hardening, and good heat preservation and fireproof performance. The existing gypsum products have the defects of low strength, insufficient water resistance and surface frosting, so that the application range and the field of the existing gypsum products are severely limited.
The embodiment of the invention provides a gypsum product with high water resistance, which comprises gypsum, geopolymer and a water reducing agent; the polymer is prepared from industrial waste and an alkaline excitant, wherein the alkaline excitant comprises the alkaline material with the mass fraction of not more than 2% calculated by sodium oxide.
By adopting the technical scheme, the mass fraction of the alkaline substances in the gypsum product is controlled to be not higher than 2 percent in terms of sodium oxide, so that the industrial waste reacts with the alkaline excitant to prepare the geopolymer in the preparation process of the gypsum product, and the geopolymer acts together with gypsum and the water reducer, so that the prepared gypsum product has the characteristic of low porosity. In addition, the advantage of high water resistance of the gypsum product is also achieved by the dense packing of the geopolymer-like material. It is emphasized that the geopolymer added in gypsum products according to the invention has a distinct distinguishing feature from the geopolymer in general: firstly, the alkali-activated material is the same alkali-activated material, but the important characteristic is that the alkali-activated material is used with lower consumption of alkali substances (Na 2 O is 2% or less by mass) instead of Na required in forming a polymer 2 The mass fraction of O is at least maintained above 4%. This is because, if a conventional geopolymer is used, the overall properties such as strength of the gypsum product are not good, and there is a frosting phenomenon. The inventor creatively discovers that the compatibility problem of the geopolymer, cement, gypsum water reducer and the like is solved on the premise of low doping amount of alkaline substances, meanwhile, the gypsum product with low water-to-material ratio is obtained, the strength and the water resistance are greatly improved, and the problem of frost return of the gypsum product can be effectively solved.
As a possible embodiment, in order to ensure optimal performance of the above gypsum product with high water resistance, the content of each component in the gypsum product, in weight percentage of the gypsum product, comprises: 60 to 80 percent of gypsum, 19 to 39 percent of geopolymer and 0.5 to 1.0 percent of water reducer. It is understood that the alkali-activator in the polymer comprises any one or more of sodium silicate, sodium metasilicate, sodium hydroxide and sodium carbonate, and the industrial waste comprises any one or more of slag powder, fly ash, steel slag powder and metakaolin. It is also understood that in the polymer-like material, the ratio of the amount of industrial waste to the amount of the alkaline activator added in terms of sodium oxide may be (18 to 37): (1-2). Illustratively, the ratio of the industrial waste to the added amount of the alkaline activator in terms of sodium oxide may be selected to be (18 to 35): (1-1.3). In addition, the gypsum in the embodiment of the invention contains any one or more of desulfurized gypsum, phosphogypsum and fluorine gypsum, and the water reducer is comb-type and/or short-branched polycarboxylic acid water reducer.
By adopting the technical scheme, the gypsum has the characteristics of light texture, quick setting and hardening and good heat preservation and fireproof performance, so that the gypsum is taken as a main component; the water reducer is a polycarboxylate water reducer, and the water resistance of the gypsum product can be effectively improved after the polycarboxylate water reducer is added into the gypsum product; the polymer similar to the ground can be obtained by controlling the consumption of alkaline substances in the alkaline excitant through industrial wastes and the alkaline excitant; in the gypsum product with high water resistance, the content of each component is controlled to ensure that the dosage of the gypsum, the geopolymer and the water reducing agent are optimally matched, the geopolymer is uniformly distributed in the gypsum product, and the gypsum product has high water resistance through the compact filling effect of the geopolymer; in addition, the invention can effectively solve the problem of frost return of the gypsum product by controlling the dosage of the alkaline excitant, and promote the compatibility of each component in the gypsum product, so that each component in the gypsum product has synergistic effect, and the strength and the water resistance of the gypsum product are further enhanced; the gypsum product of the invention has good application value and economic value in engineering, and is a low-carbon and green building material.
As a possible implementation mode, the gypsum product with high water resistance provided by the implementation mode of the invention further comprises a retarder, wherein the retarder is used in an amount of 0.01-0.1% by weight of the gypsum product; the retarder is protein and/or citric acid; the addition of the protein retarder and/or the citric acid retarder can delay the hydration reaction of gypsum, prolong the setting time of gypsum slurry, and ensure that the gypsum slurry keeps plasticity for a long time.
As one possible embodiment, the gypsum product with high water resistance provided by the embodiment of the invention further comprises fine aggregate; the fine aggregate is natural sand and/or artificial sand; the consumption of the fine aggregate is 3-5 times of the total mass of the gypsum, the geopolymer and the water reducing agent. The addition of fine aggregate can further enhance the stability of the gypsum product, and the prepared gypsum product can be applied to projects with higher requirements.
Embodiments of the present invention further provide a method of preparing a gypsum product having high water resistance, comprising:
step 1, mixing the gypsum, the geopolymer and the water reducer to obtain a mixture; adding water into the mixture, and uniformly stirring to obtain gypsum slurry;
and 2, pouring the gypsum slurry into a mould for molding to obtain a gypsum product.
In the step 1, industrial waste and an alkaline activator are uniformly mixed according to the formula amount, and the industrial waste and the alkaline activator are subjected to chemical reaction to obtain the polymer. In the step 1 of the invention, the similar polymer can be prepared firstly, and then the prepared similar polymer is mixed with gypsum and a water reducing agent according to the formula ratio to obtain a mixture. Of course, gypsum, industrial waste, an alkaline activator and a water reducer can be directly mixed together according to the formula ratio to obtain a mixture, then water is added and uniformly stirred to obtain gypsum slurry, and the industrial waste and the alkaline activator can also obtain a polymer similar to ground through chemical reaction in the gypsum slurry. Experiments prove that in the adding mode of the two types of geopolymer, the adding mode of mixing industrial waste, an alkaline excitant, gypsum and a water reducing agent has better technical effect compared with the mode of directly adding the geopolymer. Probably because, in this kind of feeding mode, the class polymer that forms is more convenient for mix with gypsum, water-reducing agent even to the product performance that makes is more excellent.
As one possible implementation manner, the gypsum in step 1 contains any one or more of desulfurized gypsum, phosphogypsum and fluorogypsum; it should be understood that the gypsum, geopolymer and water reducer are uniformly stirred by a stirrer to prepare gypsum slurry, and the stirrer can be a cement paste stirrer or a mortar stirrer by way of example; the stirring speed of the stirrer is 60-300r/min, and the stirring time of the stirrer is 3-5min; the invention can uniformly mix the components by controlling the stirring speed and the stirring time of the stirrer; the water is added in the amount of 30-45 wt% of the mass of the mixture. In the step 2, after the gypsum slurry is poured into a mould for molding, a gypsum product is prepared, and the gypsum slurry prepared by the method has good fluidity and controllable setting time, and is convenient to pour into gypsum products with various shapes; the gypsum product of the invention has good application value and economic value in engineering, and is a low-carbon and green building material.
On the basis of the embodiment, in order to further improve the stability of the gypsum product, fine aggregate can be added in the preparation process, and in order to further improve the water resistance of the gypsum product, retarder can be added in the preparation process. The embodiment of the invention further provides a preparation method of the gypsum product with high water resistance, which is added with the fine aggregate and the retarder, and comprises the following specific steps:
s100, uniformly mixing the gypsum, the geopolymer, the water reducer, the retarder and the fine aggregate to obtain a mixture; adding water into the mixture and stirring uniformly to obtain gypsum slurry;
and S200, pouring the gypsum slurry into a mould for molding, and then, obtaining the gypsum product.
According to the embodiment of the invention, the retarder and the fine aggregate are further added into the gypsum product, the addition of the retarder can delay the hydration reaction of gypsum, prolong the setting time of the gypsum slurry, and enable the gypsum slurry to keep plasticity for a long time; the addition of fine aggregate can enhance the stability of the gypsum product, and the gypsum product prepared by the method can be applied to projects with higher requirements.
For a better understanding of the present invention, the following description will further illustrate the present invention with reference to specific examples, but the present invention is not limited to the following examples.
The raw materials used in the following examples are all commercially available raw materials unless otherwise specified.
Example 1
The embodiment provides a gypsum product with high water resistance, which comprises gypsum, geopolymer and water reducer; the gypsum is desulfurized gypsum, and the geopolymer is prepared from slag powder, fly ash and water glass; the water reducer is a short-chain branched polycarboxylate water reducer, and comprises the following components in percentage by weight: 70% of desulfurized gypsum, 14% of slag powder, 11% of fly ash, 4.3% of solid water glass with the modulus of 2.4 and 0.7% of short-branched polycarboxylate superplasticizer; wherein, in the solid water glass, the dosage of the alkaline substance is 1.3 percent by mass percent based on sodium oxide.
A method of making a gypsum product of high water resistance in this example, comprising:
step 1, uniformly mixing the desulfurized gypsum, slag powder, fly ash, solid water glass and a short-chain branched polycarboxylate superplasticizer to obtain a mixture;
step 2, adding the mixture into a cement paste mixer, adding water accounting for 38 weight percent of the mass of the mixture into the cement paste mixer, and uniformly stirring to obtain gypsum slurry; the stirring speed of the cement paste stirrer is 240r/min, and the stirring time is 3min;
and 3, pouring the gypsum slurry into a mould at normal temperature for molding to obtain a gypsum product.
The gypsum slurry obtained in this example had a fluidity of 185mm and a setting time of 215min, and the gypsum product obtained in this example had a water resistance coefficient of 1.82 and a compressive strength of 22.7MPa.
Example two
The embodiment provides a gypsum product with high water resistance, which comprises gypsum, geopolymer, a water reducing agent, a retarder and fine aggregate; the gypsum is desulfurized gypsum, the geopolymer is prepared from slag powder, fly ash and water glass, the water reducer is a comb-type polycarboxylate water reducer, the retarder is a protein retarder, and the fine aggregate is artificial sand; the gypsum product comprises the following components in percentage by weight: 70% of desulfurized gypsum, 14% of slag powder, 10.92% of fly ash, 4.3% of solid sodium silicate with a modulus of 2.4, 0.7% of polycarboxylate superplasticizer and 0.08% of protein retarder; the dosage of the artificial sand is 4 times of the sum of the mass of the gypsum, the geopolymer, the water reducing agent and the retarder; wherein, in the solid water glass, the dosage of the alkaline substance is 1.3 percent by mass percent based on sodium oxide.
A method of making a gypsum product of high water resistance in this example, comprising:
step 1, uniformly mixing gypsum, slag powder, fly ash, solid water glass, a polycarboxylate water reducer, a protein retarder and artificial sand to obtain a mixture; adding the mixture into a mortar stirrer, adding water accounting for 38 weight percent of the mass of the mixture into the mortar stirrer, and uniformly stirring to obtain gypsum slurry; the stirring speed of the mortar stirrer is 80r/min, and the stirring time is 4min;
and 2, pouring the gypsum slurry into a mould at normal temperature for molding to obtain a gypsum product.
The gypsum slurry obtained in this example had a fluidity of 180mm and a setting time of 105min, and the gypsum product obtained in this example had a water resistance coefficient of 2.36 and a compressive strength of 28.2MPa.
Example III
The embodiment provides a gypsum product with high water resistance, which comprises gypsum, geopolymer and water reducer; the gypsum is desulfurized gypsum, and the geopolymer is prepared from slag powder, fly ash and sodium hydroxide; the water reducer is a short-chain branched polycarboxylate water reducer, and comprises the following components in percentage by weight: 80% of desulfurized gypsum, 9% of slag powder, 9.2% of fly ash, 1.3% of sodium hydroxide and 0.5% of short-chain branched polycarboxylate water reducer; wherein, in the sodium hydroxide, the dosage of alkaline substances is 1 percent by mass percent based on sodium oxide.
A method of making a gypsum product of high water resistance in this example, comprising:
step 1, uniformly mixing desulfurized gypsum, slag powder, fly ash, sodium hydroxide and a short-chain branched polycarboxylate superplasticizer to obtain a mixture; adding the mixture into a mortar mixer, adding water accounting for 30wt% of the mass of the mixture into a mortar shaft mixer, and uniformly stirring to obtain gypsum slurry; the stirring speed of the mortar stirrer is 90r/min, and the stirring time is 5min;
and 2, pouring the gypsum slurry into a mould at normal temperature for molding to obtain a gypsum product.
The fluidity of the gypsum slurry obtained in this example was 180mm, the setting time was 90min, the water resistance coefficient of the gypsum product obtained in this example was 1.65, and the compressive strength of the gypsum product was 23.4MPa.
Example IV
The embodiment provides a gypsum product with high water resistance, which comprises gypsum, geopolymer and water reducer; the gypsum is desulfurized gypsum, and the geopolymer is prepared from slag powder, fly ash, sodium carbonate and sodium metasilicate; the water reducer is a short-chain branched polycarboxylate water reducer, and comprises the following components in percentage by weight: 60% of desulfurized gypsum, 17.3% of slag powder, 18% of fly ash, 1.7% of sodium carbonate, 2% of sodium metasilicate and 1% of short-branched polycarboxylate water reducer; wherein, in sodium carbonate, the alkaline substance dosage is 1 percent by mass percent based on sodium oxide; in the sodium metasilicate, the alkaline substance is used in an amount of 1% by mass of sodium oxide.
A method of making a gypsum product of high water resistance in this example, comprising:
step 1, uniformly mixing desulfurized gypsum, slag powder, fly ash, sodium carbonate, sodium metasilicate and a short-chain branched polycarboxylate superplasticizer to obtain a mixture; adding the mixture into a cement paste mixer, adding 45wt% of water into the cement paste mixer, and uniformly stirring to obtain gypsum slurry; the stirring speed of the cement paste stirrer is 150r/min, and the stirring time is 3min;
and 2, pouring the gypsum slurry into a mould at normal temperature for molding to obtain a gypsum product.
The gypsum slurry obtained in this example had a fluidity of 175mm and a setting time of 115 minutes, and the gypsum product obtained in this example had a water resistance coefficient of 1.47 and a compressive strength of 20.5MPa.
Example five
The gypsum product with high water resistance provided in this example is basically the same as that in example one, except that phosphogypsum is used for replacing desulfurized gypsum, steel slag powder is used for replacing slag powder, and metakaolin is used for replacing fly ash.
The preparation method of the gypsum product with high water resistance provided in the embodiment is the same as that of the first embodiment, the fluidity of the gypsum slurry obtained in the embodiment is 185mm, the setting time is 230min, the water resistance coefficient of the gypsum product prepared in the embodiment is 1.78, and the compressive strength of the gypsum product is 21.7MPa.
Example six
The present example provides a gypsum product of high water resistance substantially the same as that of example one, except that the desulfurized gypsum is replaced with fluorogypsum.
The preparation method of the gypsum product with high water resistance provided in the embodiment is the same as that of the first embodiment, the fluidity of the gypsum slurry obtained in the embodiment is 175mm, the setting time is 190min, the water resistance coefficient of the gypsum product prepared in the embodiment is 1.72, and the compressive strength of the gypsum product is 21.3MPa.
Comparative example one
The comparative example provides a gypsum product of high water resistance substantially the same as that of example one, except that cement is used in place of the geopolymer.
The preparation method of the gypsum product with high water resistance is the same as that of the first embodiment, the fluidity of the gypsum slurry obtained in the first embodiment is 130mm, the setting time is 630min, the water resistance coefficient of the gypsum product prepared in the first embodiment is 0.41, and the compressive strength of the gypsum product is 7.3MPa.
Comparative example two
The gypsum product of this comparative example two provided a high water resistance substantially the same as that of example three except that the amount of alkali-activator was replaced with 5.16% sodium hydroxide while the amount of desulfurized gypsum was adjusted to 76.14%. Wherein, in the sodium hydroxide, the dosage of alkaline substances is 4 percent by mass percent based on sodium oxide. At this point, the geopolymer formed in the gypsum product replaces the geopolymer of example three.
Through tests, the fluidity of the gypsum slurry obtained in this comparative example was 90mm, the setting time was 7min, the water resistance coefficient of the gypsum product prepared in this example was 0.21, and the compressive strength of the gypsum product was 2.3MPa.
In summary, the fluidity of the gypsum slurries obtained in the first, second, third, fourth, fifth and sixth embodiments of the present invention is greater than that of the gypsum slurries obtained in the first and second comparative examples, and the setting time is much less than 630min of the first comparative example and 840min of the second comparative example; the water resistance and compressive strength of the gypsum products made in the examples of the present invention are also much higher than those of the gypsum products of comparative examples one and two. Therefore, the gypsum product prepared by adopting the technical scheme of the invention has the characteristics of high water resistance and high strength, and meanwhile, the gypsum slurry obtained by adopting the technical scheme of the invention also has good fluidity, and the gypsum product is suitable for decoration and decoration of buildings, especially for decoration and decoration of home houses, and is a low-carbon and green building material.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A gypsum product with high water resistance, which is characterized by comprising gypsum, geopolymer and water reducing agent; the polymer is prepared from industrial waste and an alkaline excitant, wherein the alkaline excitant comprises the alkaline material with the mass fraction of not more than 2% calculated by sodium oxide.
2. The high water resistant gypsum product of claim 1, comprising, in weight percent: 60 to 80 percent of gypsum, 19 to 39 percent of geopolymer and 0.5 to 1.0 percent of water reducer.
3. The high water resistant gypsum product of claim 2, further comprising a retarder; and/or, the retarder is used in an amount of 0.01-0.1% by weight of the gypsum product.
4. A gypsum product of any one of claims 1-3, further comprising a fine aggregate; and/or the fine aggregate is natural sand and/or artificial sand; and/or the use amount of the fine aggregate is 3-5 times of the total mass of the gypsum, the geopolymer and the water reducing agent.
5. The gypsum product of claim 1, wherein the gypsum comprises any one or more of desulfurized gypsum, phosphogypsum, and fluorogypsum.
6. The high water resistant gypsum product of claim 1, wherein the alkaline activator comprises any one or more of water glass, sodium metasilicate, sodium hydroxide, and sodium carbonate.
7. The gypsum product of claim 1, wherein the industrial waste comprises any one or more of slag powder, fly ash, steel slag powder, and metakaolin.
8. A gypsum product of high water resistance according to claim 3, wherein the retarder is a proteinaceous and/or citric retarder; and/or the water reducer is comb-type and/or short-branched polycarboxylate water reducer.
9. A process for preparing a gypsum product of high water resistance, for preparing a gypsum product of high water resistance as claimed in any one of claims 1 to 8, comprising:
uniformly mixing the gypsum, the geopolymer and the water reducing agent according to the formula amount to obtain a mixture;
adding water accounting for 30-45 wt% of the mass of the mixture into the mixture, and uniformly stirring to obtain gypsum slurry;
pouring the gypsum slurry into a mould for molding to obtain a gypsum product;
wherein the geopolymer is prepared from industrial waste and an alkaline activator.
10. The method for preparing a gypsum product with high water resistance according to claim 9, further comprising retarder and fine aggregate, wherein the gypsum, geopolymer and water reducing agent are uniformly mixed to obtain a mixture, and the method comprises the following steps:
and uniformly mixing the gypsum, the geopolymer, the water reducer, the retarder and the fine aggregate to obtain the mixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211686907.9A CN116023108A (en) | 2022-12-26 | 2022-12-26 | High-water-resistance gypsum product and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211686907.9A CN116023108A (en) | 2022-12-26 | 2022-12-26 | High-water-resistance gypsum product and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116023108A true CN116023108A (en) | 2023-04-28 |
Family
ID=86078763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211686907.9A Pending CN116023108A (en) | 2022-12-26 | 2022-12-26 | High-water-resistance gypsum product and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116023108A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101244923A (en) * | 2008-03-21 | 2008-08-20 | 长沙归一建材科技有限公司 | High-strength water resistant extrusion forming gypsum base composite ecological wallboard |
| CN102633525A (en) * | 2012-04-27 | 2012-08-15 | 同济大学 | Foam concrete with desulfurized gypsum as main cementing material and preparation method of foam concrete |
| CN103435302A (en) * | 2013-08-19 | 2013-12-11 | 四川省建材工业科学研究院 | Preparation method of high-performance composite gypsum cementing slurry |
| CN103467052A (en) * | 2013-08-30 | 2013-12-25 | 江苏省一夫新材料科技有限公司 | High-strength and water-resistant desulfurization building gypsum self-leveling material and preparation method thereof |
| CN104628349A (en) * | 2015-02-06 | 2015-05-20 | 武汉理工大学 | Phosphogypsum based high flow state grouting material |
| CN105174887A (en) * | 2015-08-27 | 2015-12-23 | 上海每天节能环保科技股份有限公司 | Modified desulphurization gypsum-based mater batch and preparation method therefor |
| CN105481321A (en) * | 2015-12-30 | 2016-04-13 | 上海每天节能环保科技股份有限公司 | Modified gypsum base screed and preparation and application thereof |
| CN114213095A (en) * | 2021-12-31 | 2022-03-22 | 江苏尼高科技有限公司 | Alkali-activated phosphogypsum self-leveling mortar |
| CN115353361A (en) * | 2022-07-13 | 2022-11-18 | 广东能源集团科学技术研究院有限公司 | Composite cementing material and preparation method and application thereof |
-
2022
- 2022-12-26 CN CN202211686907.9A patent/CN116023108A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101244923A (en) * | 2008-03-21 | 2008-08-20 | 长沙归一建材科技有限公司 | High-strength water resistant extrusion forming gypsum base composite ecological wallboard |
| CN102633525A (en) * | 2012-04-27 | 2012-08-15 | 同济大学 | Foam concrete with desulfurized gypsum as main cementing material and preparation method of foam concrete |
| CN103435302A (en) * | 2013-08-19 | 2013-12-11 | 四川省建材工业科学研究院 | Preparation method of high-performance composite gypsum cementing slurry |
| CN103467052A (en) * | 2013-08-30 | 2013-12-25 | 江苏省一夫新材料科技有限公司 | High-strength and water-resistant desulfurization building gypsum self-leveling material and preparation method thereof |
| CN104628349A (en) * | 2015-02-06 | 2015-05-20 | 武汉理工大学 | Phosphogypsum based high flow state grouting material |
| CN105174887A (en) * | 2015-08-27 | 2015-12-23 | 上海每天节能环保科技股份有限公司 | Modified desulphurization gypsum-based mater batch and preparation method therefor |
| CN105481321A (en) * | 2015-12-30 | 2016-04-13 | 上海每天节能环保科技股份有限公司 | Modified gypsum base screed and preparation and application thereof |
| CN114213095A (en) * | 2021-12-31 | 2022-03-22 | 江苏尼高科技有限公司 | Alkali-activated phosphogypsum self-leveling mortar |
| CN115353361A (en) * | 2022-07-13 | 2022-11-18 | 广东能源集团科学技术研究院有限公司 | Composite cementing material and preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2008113609A2 (en) | Geopolymer composition, coating obtainable therefrom and methods | |
| CN110183135B (en) | Quick-setting agent, quick-setting polymer cement waterproof slurry and preparation method | |
| CN101475345A (en) | Cement based polymer heat preserving dry powder mortar and using method thereof | |
| CN109439054B (en) | Putty powder and putty slurry for plastering-free machine, and preparation method and application thereof | |
| CN111943629A (en) | Preparation method of plastering gypsum mortar | |
| CN110937874A (en) | Gypsum mortar with high water resistance and preparation method thereof | |
| CN110746166A (en) | Self-crystallized anti-permeability and moisture-proof mortar and production method thereof | |
| CN111646760A (en) | Color facing mortar and preparation method thereof | |
| CN104261745A (en) | Special polymer dry-mixed mortar for mechanized construction | |
| CN111943626A (en) | Gypsum-based wall leveling material and preparation method and use method thereof | |
| CN108341650A (en) | A kind of novel dry-mixed plastering mortar and its application | |
| CN111892343A (en) | Alkali-activated geopolymer concrete mix proportion design method | |
| CN114409305B (en) | Liquid interface treating agent, environment-friendly waterproof slurry and preparation method and construction method thereof | |
| CN114644473B (en) | Ultra-low density foaming magnesium oxysulfate cement and preparation method thereof | |
| JP2009084092A (en) | Mortar-based restoring material | |
| CN114315296A (en) | Gypsum-based colored facing mortar and preparation method thereof | |
| CN105837121A (en) | Inorganic vitrified-bead environment-friendly mortar, and preparation and application methods thereof | |
| CN116023108A (en) | High-water-resistance gypsum product and preparation method thereof | |
| CN113004055B (en) | Green high-thermal-resistance self-insulation building block and preparation method thereof | |
| CN112679185B (en) | Gypsum-based foam concrete and preparation method thereof | |
| CN113860838A (en) | Anti-efflorescence color facing mortar | |
| CN111039625A (en) | Special bonding mortar for aerated concrete insulation board | |
| CN112851260A (en) | Capillary crystalline waterproofing agent and preparation method thereof | |
| CN112358225A (en) | Composite waterproof agent and preparation method and application thereof | |
| CN110436855A (en) | A kind of dry powder and mortar of the anti-accumulation of salt in the surface soil |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |