CN118026555A - Gypsum-based calcination-free sulphoaluminate cement and preparation method thereof - Google Patents
Gypsum-based calcination-free sulphoaluminate cement and preparation method thereof Download PDFInfo
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- CN118026555A CN118026555A CN202410136190.3A CN202410136190A CN118026555A CN 118026555 A CN118026555 A CN 118026555A CN 202410136190 A CN202410136190 A CN 202410136190A CN 118026555 A CN118026555 A CN 118026555A
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- 239000004568 cement Substances 0.000 title claims abstract description 82
- 239000010440 gypsum Substances 0.000 title claims abstract description 62
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 62
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 239000000843 powder Substances 0.000 claims abstract description 48
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims abstract description 22
- 244000005700 microbiome Species 0.000 claims abstract description 21
- 239000010881 fly ash Substances 0.000 claims abstract description 19
- 229910021536 Zeolite Inorganic materials 0.000 claims abstract description 16
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000002893 slag Substances 0.000 claims abstract description 16
- 239000010457 zeolite Substances 0.000 claims abstract description 16
- 229920000877 Melamine resin Polymers 0.000 claims abstract description 15
- 229910021538 borax Inorganic materials 0.000 claims abstract description 15
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims abstract description 15
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 claims abstract description 15
- 239000001509 sodium citrate Substances 0.000 claims abstract description 15
- 239000004328 sodium tetraborate Substances 0.000 claims abstract description 15
- 235000010339 sodium tetraborate Nutrition 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims abstract description 14
- 229910052925 anhydrite Inorganic materials 0.000 claims abstract description 14
- 239000002253 acid Substances 0.000 claims abstract description 12
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 12
- 239000010451 perlite Substances 0.000 claims abstract description 12
- 235000019362 perlite Nutrition 0.000 claims abstract description 12
- 229910021487 silica fume Inorganic materials 0.000 claims abstract description 11
- 238000000227 grinding Methods 0.000 claims description 11
- 238000001354 calcination Methods 0.000 claims description 8
- 239000006227 byproduct Substances 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 239000011398 Portland cement Substances 0.000 claims description 4
- 150000004683 dihydrates Chemical class 0.000 claims description 4
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims description 3
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 claims description 3
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 1
- 239000002910 solid waste Substances 0.000 abstract description 9
- 238000005265 energy consumption Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000036571 hydration Effects 0.000 abstract description 4
- 238000006703 hydration reaction Methods 0.000 abstract description 4
- 238000009395 breeding Methods 0.000 abstract description 2
- 230000001488 breeding effect Effects 0.000 abstract description 2
- 230000005284 excitation Effects 0.000 abstract description 2
- 235000012041 food component Nutrition 0.000 abstract description 2
- 230000008929 regeneration Effects 0.000 abstract description 2
- 238000011069 regeneration method Methods 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- -1 sulfur (iron) aluminate Chemical class 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- JHLNERQLKQQLRZ-UHFFFAOYSA-N calcium silicate Chemical compound [Ca+2].[Ca+2].[O-][Si]([O-])([O-])[O-] JHLNERQLKQQLRZ-UHFFFAOYSA-N 0.000 description 2
- 229910052918 calcium silicate Inorganic materials 0.000 description 2
- 235000012241 calcium silicate Nutrition 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 206010053567 Coagulopathies Diseases 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000004645 aluminates Chemical class 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000035602 clotting Effects 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 238000009629 microbiological culture Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 239000004482 other powder Substances 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000003469 silicate cement Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to the technical field of special cement, and relates to gypsum-based calcination-free sulphoaluminate cement and a preparation method thereof. In order to solve the problems of high energy consumption and high pollution of the calcined clinker of the production of the sulphoaluminate cement and the problem of regeneration and high utilization of multiple solid wastes, the gypsum-based calcination-free sulphoaluminate cement comprises building gypsum, anhydrite, silica fume, superfine fly ash, cement, carbide slag, zeolite powder, expanded perlite loaded microorganism powder, aluminum sulfate, melamine, borax, sodium citrate and polycarboxylic acid high-performance water reducer, and effective nutritional components are provided for microorganisms through reasonable matching of the melamine, the borax and the sodium citrate, so that the breeding of the microorganisms and the increase of excrement are promoted, the self-repairing and comprehensive performance of the calcination-free sulphoaluminate cement are further improved, and the normal hydration and the strength increase of the calcination-free sulphoaluminate cement are realized through the optimized combination of the multi-component solid waste powder by introducing the enhanced excitation components and the microorganisms.
Description
Technical Field
The invention belongs to the technical field of special cement, relates to gypsum-based calcination-free sulphoaluminate cement and a preparation method thereof, in particular to the application field of replacing or partially replacing traditional sulphoaluminate cement, and has the advantages of low carbon, environment friendliness, ultralow energy consumption, calcination-free performance, multiple solid waste utilization, high added value and the like.
Background
Since 1908 aluminate cement was invented, special cement entered a high-speed development stage, and a large number of special cement varieties were invented and applied. In most developed countries, the special cement is used in an amount of 5 to 10 percent of the total cement. The research and production of special cement in China starts from the 30 th century and the 80 th century of sulfur (iron) aluminate cement is invented, which is another important innovation in the development of cement varieties in the history of human beings. Through the development of more than half a century, the technical level of special cement in China has been in the forefront of the world. The sulfur (iron) aluminate cement has the characteristics of quick setting, quick hardening, high early strength, concentrated hydration heat release, capability of hydration hardening at low temperature, good freezing resistance, good impermeability and the like, and also has the characteristics of excellent corrosion resistance, low alkalinity and the like. In addition, the concrete prepared by the cement has very good carbonization resistance, alkali aggregate reaction resistance and shrinkage creep resistance, and is widely applied to the fields of ocean engineering, low-temperature construction engineering, rapid construction engineering, archaized art building engineering and the like.
However, the production of the sulphoaluminate cement belongs to the industry with high energy consumption and high pollution, the clinker calcining temperature is only about 100 ℃ lower than that of the silicate cement clinker, and the clinker calcining temperature can only be reduced to about 1200 ℃ after the research and development of the high belite sulphoaluminate cement and the like by expert students.
Therefore, it is urgent to develop a baking-free low-energy-consumption sulphoaluminate cement, according to the invention, the main minerals of the sulphoaluminate cement clinker are anhydrous calcium sulphoaluminate (C 4A3 S) dicalcium silicate (C 2 S) and an iron phase, wherein, C 4A3 S accounts for 55% -75%, C 2 S accounts for 8% -37%, the iron phase accounts for about 3% -10%, then gypsum is doped into the sulphoaluminate cement to prepare the sulphoaluminate cement, and the baking-free sulphoaluminate cement can solve the problems.
Disclosure of Invention
The invention aims to solve the problems of high energy consumption and high pollution of the calcined clinker of the sulphoaluminate cement and the regeneration and high-quality utilization of multiple solid wastes, and simultaneously realize the mass production of the gypsum-based multiple solid waste calcination-free sulphoaluminate cement so as to meet the application scene of special cement and the realization of the 'double carbon' target.
The invention adopts the following technical scheme to achieve the aim:
The invention provides gypsum-based calcination-free sulphoaluminate cement, which comprises the following raw material components in percentage by mass:
Building gypsum: 25 to 50 percent
Anhydrite: 10% -25%;
silica fume: 0.5% -2%;
ultrafine fly ash: 12% -20%;
and (3) cement: 6% -10%;
carbide slag: 2% -5%;
Zeolite powder: 5% -10%;
The expanded perlite carries microorganism powder: 2% -7%;
Aluminum sulfate: 0.4% -1%;
Melamine: 0.2 to 0.5 percent;
Borax: 0.2 to 0.6 percent;
sodium citrate: 0.01% -0.05%;
Polycarboxylic acid high-performance water reducer: 0.3 to 0.8 percent.
Further, the building gypsum is semi-hydrated gypsum, the fineness of the semi-hydrated gypsum is controlled to be 200 meshes, and the semi-hydrated gypsum is prepared by grinding natural dihydrate gypsum ore and then calcining, or is prepared by calcining industrial byproducts of desulfurized gypsum and phosphogypsum, or is prepared by drying at 100 ℃.
Further, the anhydrite is ground into powder or calcined into anhydrous gypsum by-product gypsum powder of natural anhydrite powder or natural dihydrate gypsum powder.
Further, the superfine fly ash is prepared by grinding circulating fluidized bed fly ash, and the specific surface area is controlled at 800m 2/kg～1200m2/kg.
Further, the cement is P.O42.5 cement or Portland cement.
Further, the waste residue of acetylene gas produced by the carbide slag chemical plant is dried and ground to obtain the product, and the specific surface area of the product is more than 300m 2/kg.
Further, the zeolite powder is formed by grinding tailings, and the specific surface area of the zeolite powder is more than 300m 2/kg.
Further, the aluminum sulfate is 200 mesh powder.
The invention also provides a preparation method of the gypsum-based calcination-free sulphoaluminate cement, which comprises the following steps:
Adding building gypsum, anhydrite, silica fume, superfine fly ash, cement, carbide slag, zeolite powder, expanded perlite loaded microorganism powder, aluminum sulfate, melamine, borax, sodium citrate and polycarboxylic acid high-performance water reducer into a powder mixer according to the mass percentage of each raw material component, and mixing for 5-7 min to obtain the gypsum-based calcination-free sulphoaluminate cement
Compared with the prior art, the invention has the following advantages:
(1) The calcination-free sulphoaluminate cement powder material has the advantages of simple production, no toxicity and no pollution; the compression strength at each age is high, the compression strength at the later stage is not reduced, the durability is good, and the preparation method has the advantages of ultralow energy consumption, no calcination, multiple solid wastes, low cost and the like.
(2) The traditional high-temperature calcined clinker is used for producing special cement, and the baking-free sulphoaluminate cement is changed into the baking-free sulphoaluminate cement, so that the ultralow energy consumption is realized, and the utilization rate of solid waste can reach about 95%.
(3) Through reasonable matching of melamine, borax and sodium citrate, effective nutritional components are provided for microorganisms, the breeding of microorganisms and the increase of excrement are promoted, and the self-repairing property and the comprehensive performance of the baking-free sulphoaluminate cement are further improved.
(4) Through the optimal combination of the multi-component solid waste powder, the normal hydration and the strength increase of the baking-free sulphoaluminate cement are realized by introducing the enhanced excitation component and the microorganism.
(5) The production of the gypsum-based multi-solid waste calcination-free sulphoaluminate cement is realized, so that the application scene of special cement and the realization of a double-carbon target are met.
Detailed Description
In order to further illustrate the technical scheme of the invention, the invention is further illustrated by the following examples.
The gypsum-based calcination-free sulphoaluminate cement comprises the following raw material components in percentage by mass:
Building gypsum: 25 to 50 percent
Anhydrite: 10% -25%;
silica fume: 0.5% -2%;
ultrafine fly ash: 12% -20%;
and (3) cement: 6% -10%;
carbide slag: 2% -5%;
Zeolite powder: 5% -10%;
The expanded perlite carries microorganism powder: 2% -7%;
Aluminum sulfate: 0.4% -1%;
Melamine: 0.2 to 0.5 percent;
Borax: 0.2 to 0.6 percent;
sodium citrate: 0.01% -0.05%;
Polycarboxylic acid high-performance water reducer: 0.3 to 0.8 percent.
The building gypsum is natural dihydrate gypsum ore powder and calcined into semi-hydrated gypsum, or industrial byproducts such as desulfurized gypsum, phosphogypsum and the like are calcined into semi-hydrated gypsum, and can also be prepared by drying at 100 ℃, and the fineness of the desulfurized semi-hydrated gypsum is controlled to be about 200 meshes.
The anhydrite is prepared by grinding natural anhydrite into powder, or calcining natural anhydrite powder as industrial byproduct to obtain anhydrous gypsum, wherein the fineness of the natural anhydrite powder is controlled to be about 200 meshes.
The superfine fly ash is made by grinding the fly ash of a circulating fluidized bed, and the specific surface area is controlled at 800m 2/kg～1200m2/kg.
The cement is commercial 42.5-grade ordinary Portland cement, or Portland cement can be used instead, and the cement P.O42.5 is selected in the embodiment.
The superfine fly ash is made by grinding the fly ash of a circulating fluidized bed, and the specific surface area is controlled at 800m 2/kg～1200m2/kg.
The carbide slag is waste slag of acetylene gas produced in chemical plants, and is formed by drying and grinding, and the specific surface area of the carbide slag is more than 300m 2/kg.
The zeolite powder is prepared by grinding tailings, and the specific surface area is more than 300m 2/kg.
The expanded perlite loaded microorganism powder is developed and produced by the sciences and technologies of the microorganism building materials of the family Sanchidaceae, is prepared by independently screening KJ series microorganisms loaded on expanded perlite powder of about 100 meshes and drying at low temperature, wherein the KJ series microorganisms are preserved in the China general microbiological culture Collection center, and the preservation number is as follows: CGMCC NO 15516.
The aluminum sulfate is industrial grade, and is prepared into powder with about 200 meshes, white crystals or slightly yellowish, contains 16 molecules of crystal water and is easy to dissolve in water.
The melamine, borax and sodium citrate are all industrial grade, the melamine plays a role in strengthening and toughening in the system, and the borax and the sodium citrate play a role in retarding. Other retarders may also be selected, such as boric acid, phosphates, organic acid salts, and the like.
The polycarboxylic acid high-performance water reducer is commercial standard powder, and the water reducing rate is 26%.
The preparation method comprises the steps of adding the raw materials into a gravity-free mixer (or other powder mixers) according to a proportion and mixing for 5-7 min to obtain a finished product.
Example 1
The gypsum-based calcination-free sulphoaluminate cement of the embodiment comprises:
Building gypsum: 25%;
anhydrite: 25%;
Silica fume: 1.2%;
Ultrafine fly ash: 20% of a base;
P.o42.5 cement: 10%;
Carbide slag: 2%;
zeolite powder: 8%;
The expanded perlite carries microorganism powder: 7%;
aluminum sulfate: 1%;
melamine: 0.29%;
Borax: 0.2%;
sodium citrate: 0.01%;
Polycarboxylic acid high-performance water reducer: 0.3%.
Example 2
The gypsum-based calcination-free sulphoaluminate cement of the embodiment comprises:
building gypsum: 28%;
Anhydrite: 22%;
silica fume: 2%;
Ultrafine fly ash: 18%;
p.o42.5 cement: 7%;
carbide slag: 5%;
Zeolite powder: 10%;
The expanded perlite carries microorganism powder: 5.6%;
aluminum sulfate: 0.8%;
melamine: 0.5%;
borax: 0.48%;
Sodium citrate: 0.02%;
Polycarboxylic acid high-performance water reducer: 0.6%.
Example 3
The gypsum-based calcination-free sulphoaluminate cement of the embodiment comprises:
Building gypsum: 42%;
Anhydrite: 18%;
Silica fume: 1%;
Ultrafine fly ash: 16%;
P.o42.5 cement: 6%;
carbide slag: 4%;
zeolite powder: 7%;
The expanded perlite carries microorganism powder: 4.3%;
Aluminum sulfate: 0.6%;
Melamine: 0.2%;
Borax: 0.37%;
sodium citrate: 0.03%;
Polycarboxylic acid high-performance water reducer: 0.5%.
Example 4
The gypsum-based calcination-free sulphoaluminate cement of the embodiment comprises:
Building gypsum: 45%;
Anhydrite: 14%;
silica fume: 0.5%;
ultrafine fly ash: 14%;
P.o42.5 cement: 10%;
carbide slag: 5%;
Zeolite powder: 6%;
the expanded perlite carries microorganism powder: 3.1%;
Aluminum sulfate: 0.9%;
Melamine: 0.4%;
Borax: 0.36%;
Sodium citrate: 0.04%;
polycarboxylic acid high-performance water reducer: 0.7%.
Example 5
The gypsum-based calcination-free sulphoaluminate cement of the embodiment comprises:
building gypsum: 50%;
Anhydrite: 10%;
silica fume: 2%;
ultrafine fly ash: 12%;
P.o42.5 cement: 9%;
carbide slag: 5%;
zeolite powder: 5%;
The expanded perlite carries microorganism powder: 4.7%;
Aluminum sulfate: 0.4%;
melamine: 0.45%;
Borax: 0.6%;
Sodium citrate: 0.05%;
Polycarboxylic acid high-performance water reducer: 0.8%.
The cement material is prepared according to the mass percentage and the preparation method, and the finished product is obtained. When in use, the water-gel ratio is controlled to be 0.27-0.30, and the mixture is stirred uniformly.
Referring to "sulphoaluminate cement" GB20472-2006, performance tests were carried out on the gypsum-based calcination-free sulphoaluminate cements prepared in examples 1 to 5, and the test results are shown in the following table:
Table 1 test results of examples 1 to 5
Note that: the clotting time is a negotiable indicator.
As shown in Table 1, the gypsum-based calcination-free sulphoaluminate cement prepared by the invention has good performance test results in terms of free expansion rate, compressive strength, flexural strength and the like, and is higher than the standard, wherein example 2 is a preferred formula.
Claims (9)
1. The gypsum-based calcination-free sulphoaluminate cement is characterized by comprising the following raw material components in percentage by mass:
Building gypsum: 25 to 50 percent
Anhydrite: 10% -25%;
silica fume: 0.5% -2%;
ultrafine fly ash: 12% -20%;
and (3) cement: 6% -10%;
carbide slag: 2% -5%;
Zeolite powder: 5% -10%;
The expanded perlite carries microorganism powder: 2% -7%;
Aluminum sulfate: 0.4% -1%;
Melamine: 0.2 to 0.5 percent;
Borax: 0.2 to 0.6 percent;
sodium citrate: 0.01% -0.05%;
Polycarboxylic acid high-performance water reducer: 0.3 to 0.8 percent.
2. The gypsum-based calcination-free sulfoaluminate cement according to claim 1, wherein the building gypsum is semi-hydrated gypsum with fineness controlled to 200 meshes, and the semi-hydrated gypsum is prepared by grinding natural dihydrate gypsum ore and calcining, or is prepared by calcining industrial byproducts of desulfurized gypsum and phosphogypsum, or is prepared by drying at 100 ℃.
3. The gypsum-based calcination-free sulphoaluminate cement of claim 1, wherein the anhydrite is ground into powder or calcined into anhydrous gypsum from natural anhydrite powder or industrial byproduct gypsum powder.
4. The gypsum-based calcination-free sulphoaluminate cement of claim 1, wherein the superfine fly ash is prepared by grinding circulating fluidized bed fly ash, and the specific surface area is controlled at 800m 2/kg～1200m2/kg.
5. A gypsum-based calcination-free class sulfoaluminate cement according to claim 1, wherein the cement is p.o42.5 cement or portland cement.
6. The gypsum-based calcination-free sulphoaluminate cement of claim 1, wherein the waste residue of acetylene gas produced by the carbide slag chemical plant is dried and ground to obtain the gypsum-based calcination-free sulphoaluminate cement, and the specific surface area of the gypsum-based calcination-free sulphoaluminate cement is more than 300m 2/kg.
7. The gypsum-based calcination-free sulphoaluminate cement of claim 1, wherein the zeolite powder is formed by grinding tailings, and the specific surface area of the zeolite powder is more than 300m 2/kg.
8. The gypsum-based calcination-free sulfoaluminate cement according to claim 1, wherein the aluminum sulfate is 200 mesh powder.
9. A method for preparing the gypsum-based calcination-free sulfoaluminate cement according to any one of claims 1 to 8, comprising the steps of:
And adding the building gypsum, the anhydrite, the silica fume, the superfine fly ash, the cement, the carbide slag, the zeolite powder, the expanded perlite loaded microorganism powder, the aluminum sulfate, the melamine, the borax, the sodium citrate and the polycarboxylic acid high-performance water reducer into a powder mixer according to the mass percentage of each raw material component, and mixing for 5-7 min to obtain the gypsum-based calcination-free sulphoaluminate cement.
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