CN110372240B - Preparation and use method of normal-temperature-curing low-price alkali-activated cement - Google Patents
Preparation and use method of normal-temperature-curing low-price alkali-activated cement Download PDFInfo
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- CN110372240B CN110372240B CN201910835460.9A CN201910835460A CN110372240B CN 110372240 B CN110372240 B CN 110372240B CN 201910835460 A CN201910835460 A CN 201910835460A CN 110372240 B CN110372240 B CN 110372240B
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- 239000004568 cement Substances 0.000 title claims abstract description 58
- 239000003513 alkali Substances 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 40
- 238000001354 calcination Methods 0.000 claims abstract description 18
- 238000002156 mixing Methods 0.000 claims abstract description 15
- BITYAPCSNKJESK-UHFFFAOYSA-N potassiosodium Chemical compound [Na].[K] BITYAPCSNKJESK-UHFFFAOYSA-N 0.000 claims abstract description 15
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 11
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 10
- 238000010791 quenching Methods 0.000 claims abstract description 10
- 230000000171 quenching effect Effects 0.000 claims abstract description 10
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 10
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 22
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 18
- 239000000292 calcium oxide Substances 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 17
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims description 14
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 14
- 229910052593 corundum Inorganic materials 0.000 claims description 14
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 14
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 12
- 229910000503 Na-aluminosilicate Inorganic materials 0.000 claims description 11
- 239000000429 sodium aluminium silicate Substances 0.000 claims description 11
- 235000012217 sodium aluminium silicate Nutrition 0.000 claims description 11
- 229910052681 coesite Inorganic materials 0.000 claims description 10
- 229910052906 cristobalite Inorganic materials 0.000 claims description 10
- 239000000395 magnesium oxide Substances 0.000 claims description 10
- 239000000377 silicon dioxide Substances 0.000 claims description 10
- 229910052682 stishovite Inorganic materials 0.000 claims description 10
- 229910052905 tridymite Inorganic materials 0.000 claims description 10
- 239000011734 sodium Substances 0.000 claims description 9
- 239000002893 slag Substances 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 8
- 239000002002 slurry Substances 0.000 claims description 7
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 4
- 239000011575 calcium Substances 0.000 claims description 4
- 229910052791 calcium Inorganic materials 0.000 claims description 4
- 239000004567 concrete Substances 0.000 claims description 3
- 230000001590 oxidative effect Effects 0.000 claims description 2
- 230000014759 maintenance of location Effects 0.000 claims 1
- 238000000227 grinding Methods 0.000 abstract description 8
- 229910000323 aluminium silicate Inorganic materials 0.000 abstract description 5
- 229910052799 carbon Inorganic materials 0.000 abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 25
- 235000012255 calcium oxide Nutrition 0.000 description 12
- 239000011398 Portland cement Substances 0.000 description 5
- 239000000404 calcium aluminium silicate Substances 0.000 description 5
- 235000012215 calcium aluminium silicate Nutrition 0.000 description 5
- WNCYAPRTYDMSFP-UHFFFAOYSA-N calcium aluminosilicate Chemical compound [Al+3].[Al+3].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O WNCYAPRTYDMSFP-UHFFFAOYSA-N 0.000 description 5
- 229940078583 calcium aluminosilicate Drugs 0.000 description 5
- 229910000029 sodium carbonate Inorganic materials 0.000 description 4
- 235000017550 sodium carbonate Nutrition 0.000 description 4
- 235000019738 Limestone Nutrition 0.000 description 3
- 239000006028 limestone Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000005997 Calcium carbide Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000012190 activator Substances 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 235000011116 calcium hydroxide Nutrition 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 238000001879 gelation Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- HXELDDLUAGVKCK-UHFFFAOYSA-N [N]=O.[S] Chemical compound [N]=O.[S] HXELDDLUAGVKCK-UHFFFAOYSA-N 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 150000001669 calcium Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000006253 efflorescence Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000000887 hydrating effect Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical group O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 206010037844 rash Diseases 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
Classifications
-
- 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
- C04B12/00—Cements not provided for in groups C04B7/00 - C04B11/00
- C04B12/04—Alkali metal or ammonium silicate cements ; Alkyl silicate cements; Silica sol cements; Soluble silicate cements
Abstract
The invention discloses a preparation and use method of normal temperature curing cheap alkali-activated cement, which comprises the steps of mixing and grinding a small amount of industrial alkali, sodium potassium aluminosilicate and calcareous raw materials, calcining at 1250-1300 ℃, quenching to obtain clinker, grinding the clinker into powder, uniformly mixing 3.0-10.0% of sodium silicate with the modulus of 1.0-2.0 to obtain the cement, adding water into the cement during use, uniformly mixing, vibrating to form a test block, preserving moisture at normal temperature for 28 days, and placing the test block in saturated moisture in the first 7 days. The cement prepared by the method has the characteristics of wide raw materials, low price, low consumption, low carbon emission, stable and easily controlled performance and the like, and has wide application prospect.
Description
Technical Field
The invention belongs to the field of cement building materials and application thereof, and particularly relates to a preparation method and a use method of alkali-activated cement.
Background
From 1824, the british J. Asperdin got the patent right of portland cement, the portland cement with huge productivity has been put down in the limelight for the development of human civilization for nearly 200 years, but the preparation of the main composition, namely the portland clinker, still has the outstanding problems of carbon emission, high energy and material consumption, serious pollution of dust and sulfur nitrogen oxide gas, poor corrosion resistance and durability and the like. The alkali-activated cement has the outstanding advantages of early strength, corrosion resistance, good freeze thawing property and the like, can utilize a large amount of solid waste residues, is low-carbon, energy-saving and environment-friendly, and is considered to be one of novel cement varieties which most possibly replace portland cement. The traditional alkali-activated cement is a double-component cement hardened by using strong alkali to activate active amorphous aluminosilicate (calcium) salt, still has a plurality of defects and becomes a bottleneck hindering the popularization and application of the cement: (1) the chemical composition of kaolin is relatively far away from the average value of the upper crust, resources are scarce, and the price of other main raw materials of alkali-activated cement, such as fly ash, blast furnace slag and the like, is increased due to the fact that the main raw materials are used as admixtures of portland cement in large quantity, so that the raw material cost is great; (2) highly incorporated industrial alkali activators (as Na)23-14 wt% of O), which causes high cost and is easy to cause efflorescence to influence durability; (3) the inherent composition variability of the industrial waste residue makes the performance and the preparation process of the alkali-activated cement prepared by taking the industrial waste residue as a main raw material difficult to stably regulate and standardize. Patent CN102730996A discloses a method for preparing single-component alkali-activated cement, which is prepared by mixing SiO-containing cement2、Al2O3And of CaOMixing the solid raw material with alkali, calcining at 950-1200 ℃, cooling, grinding to obtain cement, directly hydrating the cement powder, and maintaining at 50-80 ℃ to obtain hardened cement stone. However, Na is contained in the cement2O+0.658K2The content of O is 6-25%, compared with the traditional two-component alkali-activated cement, the content is not reduced, and all alkali metals are derived from expensive industrial alkali salt, although the calcination temperature is lower, the cost is still higher, and no obvious advantage is generated. Studies of Penmei, et al (Applied Clay Science, 2017,139: 64-71) showed that SiO2、Al2O3CaO, MgO and Na2The clinker obtained by calcining the mixture of O at a temperature of less than 1200 ℃ mainly consists of various crystalline phases, and the hydration phase of the clinker is also mainly a crystalline phase. Since only a few crystal phases have gelation properties, the gelation properties of cement are limited, which is very different from highly-gelling alkali-activated cement in which both cement and hydrated body are amorphous.
Disclosure of Invention
The calcium aluminosilicate is calcined, melted and quenched to obtain the blast furnace slag mainly containing amorphous glass phase, and the blast furnace slag has high alkali-activated gelling property. The alkali metal component is mixed into the calcium aluminosilicate raw material, so that the melting temperature of the calcium aluminosilicate raw material can be obviously reduced, the reaction activity of the calcium aluminosilicate raw material is improved, and the alkali-activated cement prepared by using the calcium aluminosilicate raw material as an active component can also reduce the mixing amount of an alkali activator, thereby reducing the cost from two aspects. The invention aims to provide a preparation method of normal-temperature curing low-cost alkali-activated cement, which is prepared by firing a glass phase-based alkali-activated cement with a chemical composition mainly comprising SiO2、Al2O3、CaO、Na2O and K2And the clinker of O is used for preparing alkali-activated cement with low consumption of alkali-activating agent.
In order to achieve the purpose, the invention adopts the technical scheme that: a method for preparing normal temperature curing cheap alkali-activated cement comprises the steps of mixing industrial alkali, calcium raw materials and sodium potassium aluminosilicate raw materials, grinding the mixture to be full-sized and 100-mesh-screened, fully calcining the mixture at 1250-1350 ℃ in an oxidizing atmosphere, quenching the calcined mixture to obtain dry clinker, grinding the dry clinker to be less than or equal to 10% of fineness of 200-mesh screen residue, and mixing with sodium silicate to obtain the cement.
As a more specific embodimentThe sodium potassium aluminosilicate material is SiO which must be contained in the chemical composition2、Al2O3、Na2O and/or K2Solid matter of O, which is required to oxidize SiO in the residue after calcination at 1100 deg.C sufficiently2+Al2O3+Na2O+K2The mass ratio of O + CaO + MgO is not less than 95.0%, and the content of SiO in the mixture2+Al2O3+Na2O+K2In the total mass of O + CaO + MgO, the contents of all components are respectively CaO: 0-5.0%, MgO: 0 to 2.0% of SiO2：50.0~75.0%，Al2O3：15.0~35.0%，Na2O+K2O：5.0~11.0%。
As a more specific embodiment, the industrial soda refers to caustic soda and/or soda ash, and the content of the caustic soda and/or soda ash is Na2The mass ratio of O to the potassium sodium aluminosilicate raw material after being oxidized and calcined at 1100 ℃ is 0-2.0%.
More specifically, the calcareous raw material is a raw material which can generate a CaO phase when calcined alone, and the mixing amount of the calcareous raw material is 44.0-80.0% by mass ratio of CaO and the potassium sodium aluminosilicate raw material after being oxidized and calcined at 1100 ℃.
In a more specific embodiment, the sodium silicate is water-soluble SiO2And Na2O as a raw material in an amount of SiO contained2+Na2The mass of the O is 3.0-10.0% of the clinker powder, and the modulus of the sodium silicate is 1.0-2.0.
In a more specific embodiment, the post-calcination quenching is a water quenching cooling method commonly used for blast furnace slag quenching, and the clinker cooled to normal temperature by controlling the water quenching water amount is dry and anhydrous.
The invention also provides a use method of the normal-temperature curing low-price alkali-activated cement prepared by the method, which comprises the steps of dissolving and diluting sodium silicate by water, cooling, uniformly mixing with clinker powder to prepare slurry, vibrating and compacting the slurry to obtain a cement paste test block, and maintaining for 28 days under normal temperature and moisture. The corresponding liquid-solid ratio needs to meet the fluidity required by vibration compaction.
As an optimized embodiment, the cement paste test block is cured in air with saturated humidity at normal temperature for 7 days, and is continuously cured in moisture or immersed in water for 28 days after 7 days.
As an optimized implementation mode, in order to meet the comprehensive use performance of the building member and save cost, the sandstone aggregate is doped into the cement slurry before the test block is formed to prepare the concrete, and the corresponding liquid-solid ratio needs to be adjusted to meet the workability and later use performance of the concrete.
The invention has the beneficial effects that:
(1) compared with Portland cement, the cement provided by the invention has the advantages that the limestone demand and the clinker calcination temperature are obviously reduced, the carbon emission, the energy consumption and the cost can be obviously reduced, and the service performance is basically equivalent.
(2) Compared with the traditional two-component alkali-activated cement, the cement has lower industrial alkali demand and the calcination temperature is far lower than the preparation temperature of slag and fly ash, so that the preparation cost of the cement is obviously reduced, the chemical composition of the cement is frequently passively changed along with the production process, the formula is difficult to regulate and control, the stability of the strength performance is poor, and the chemical composition and the strength performance of the cement can be stably regulated and controlled.
Detailed Description
The present invention is further illustrated by the following specific examples, but the scope of the invention to be claimed is not limited thereto.
Preparing soda ash, caustic soda, potassium sodium aluminosilicate raw material and calcium raw material, wherein the potassium sodium aluminosilicate raw material comprises 6 kinds, all of which are natural rock mixture, and SiO in residue after calcination at 1100 deg.C2+Al2O3+Na2O+K2The mass ratio of O + CaO + MgO is 96-98%, and the rest of the chemical components are mainly Fe2O3With TiO2. With SiO2+Al2O3+Na2O+K2The chemical compositions of 6 sodium potassium aluminosilicate raw materials calculated by taking O + CaO + MgO as 100 percent are detailed in Table 1, and the contents of the components meet the requirements of CaO: 0-5.0%, MgO: 0 to 2.0% of SiO2：50.0~75.0%，Al2O3：15.0~35.0%，Na2O+K2O: 5.0 to 11.0 percent. Mixing soda ash or caustic soda with potassium sodium aluminosilicate and calcium raw materials at a certain proportion to obtain 12 raw material formulasThe mixing proportion of the raw materials in the material (detailed in table 2) meets the following requirements: the amount of soda or caustic soda is determined by Na in the soda or caustic soda2The mass ratio of O to the potassium sodium aluminosilicate raw material after calcination at 1100 ℃ is 0-2.0%, and the calcareous raw material comprises CaCO as the main component3The natural limestone, the quicklime, the hydrated lime and the calcium carbide slag containing lime are 44.0-80.0 percent of the mixing amount of the natural limestone, the quicklime, the hydrated lime and the calcium carbide slag containing lime, wherein the mixing amount is calculated according to the mass ratio of CaO and potassium sodium aluminosilicate raw materials after calcination at 1100 ℃. Grinding the mixture for about half an hour by using a cement experimental small grinding ball to ensure that the ground powder has fineness which can completely pass through a standard sieve of 100 meshes. And calcining the ground raw material powder in a common muffle furnace (air atmosphere). The calcination of each raw material was carried out at a maximum temperature in the range of 1250 to 1350 ℃ and a holding time at the maximum temperature of 3 hours. And directly taking the clinker obtained after calcination out of the furnace, granulating and cooling, and controlling the water consumption of water quenching so that the obtained cooled clinker is dry and anhydrous. And grinding the clinker cooled to room temperature to the fineness of less than or equal to 10 percent of the rest of 200 meshes of sieve to obtain the clinker powder. The industrial water glass (modulus 3.2) is mixed with caustic soda to adjust the modulus, and simultaneously water is mixed to achieve the liquid-solid ratio required for preparing cement paste. Cooling the sodium water glass solution, mixing with clinker powder in a cement paste mixer, filling the slurry into a steel mould with the specification of 40 × 40 × 36, vibrating, compacting and molding a prism cement paste test block, and curing in a cement standard curing box in air with the humidity of 20 ℃ being more than 90%. Wherein the content of the sodium silicate is SiO2+Na2The content of O is 3.0-10.0% of the clinker powder, and the modulus of the sodium silicate is 1.0-2.0 (see table 2 for details). And (4) continuously curing the hardened and demoulded test block in a curing box, and detecting the 3-day and 28-day age compressive strength of the test block at a loading speed of 2 KN/S. From the compressive strengths of the test blocks in Table 2, it can be seen that the corresponding cement should substantially meet or exceed the strength properties of the PO42.5 cement.
Claims (5)
1. A preparation method of normal temperature curing cheap alkali-activated cement is characterized in that industrial alkali, calcium raw materials and potassium sodium aluminosilicate raw materials are mixed and ground to be full-sized and 100-mesh-screened, then fully calcined at 1250-1350 ℃ in oxidizing atmosphere and quenched to obtain dry clinker, the dry clinker is ground to be 200-mesh-screened fineness less than or equal to 10%, and then sodium silicate is mixed to prepare the cement; the potassium sodium aluminosilicate raw material is a chemical composition which must contain SiO2、Al2O3、Na2O and/or K2Solid matter of O, which is required to oxidize SiO in the residue after calcination at 1100 deg.C sufficiently2+Al2O3+Na2O+K2The mass ratio of O + CaO + MgO is not less than 95.0%, and the content of SiO in the mixture2+Al2O3+Na2O+K2In the total mass of O + CaO + MgO, the contents of all components are respectively CaO: 0-5.0%, MgO: 0 to 2.0% of SiO2：50.0~75.0%，Al2O3：15.0~35.0%，Na2O+K2O: 5.0-11.0%; the calcareous raw material is a raw material capable of generating a CaO phase during single calcination, and the doping amount of the calcareous raw material is 44.0-80.0% by mass ratio of CaO and potassium sodium aluminosilicate raw material after being oxidized and calcined at 1100 ℃; the industrial alkali refers to caustic soda and/or calcined soda, and the content of the industrial alkali is Na2The mass ratio of O to the potassium sodium aluminosilicate raw material after being oxidized and calcined at 1100 ℃ is 0-2.0%; the sodium silicate is water-soluble SiO2And Na2O as a raw material in an amount of SiO contained2+Na2The mass of the O is 3.0-10.0% of the clinker powder, and the modulus of the sodium silicate is 1.0-2.0.
2. The method for preparing normal temperature curing cheap alkali-activated cement as claimed in claim 1, wherein the post-calcination quenching is a water quenching cooling method commonly used for blast furnace slag quenching, and the clinker cooled to normal temperature is dry and anhydrous.
3. The use method of the normal temperature curing cheap alkali-activated cement prepared by the method of claim 1 or 2 is characterized in that sodium water glass is dissolved and diluted by water, cooled and uniformly mixed with clinker powder to prepare slurry, the slurry is vibrated and compacted to obtain a cement paste test block, and the cement paste test block is maintained for 28 days under the condition of normal temperature moisture retention.
4. The use method of normal temperature curing cheap alkali-activated cement as claimed in claim 3, wherein the cement paste test block is cured in air with saturated humidity at normal temperature 7 days before and then cured in moisture or immersed in water for 28 days after 7 days.
5. The use method of normal temperature curing low-cost alkali-activated cement as claimed in claim 3, wherein the concrete is prepared by mixing sandstone aggregate into the cement slurry before the test block is formed.
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| CN112592148B (en) * | 2021-01-24 | 2022-06-28 | 湖南科技大学 | Method for preparing structural material by utilizing brick-concrete building solid waste reclaimed sand powder with high doping amount |
| CN112592147B (en) * | 2021-01-24 | 2022-06-24 | 湖南科技大学 | Preparation and construction method of brick-concrete building waste residue regenerated road base inorganic mixture |
| CN112592077B (en) * | 2021-01-24 | 2022-06-28 | 湖南科技大学 | Brick-concrete building waste residue cold-recycling cementing material and use method thereof |
| CN113548823B (en) * | 2021-08-23 | 2022-05-24 | 深圳大学 | Potassium aluminosilicate nanogel precursor additive and application thereof in low-calcium system geopolymer |
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| US3451665A (en) * | 1964-08-31 | 1969-06-24 | Heinrich Zur Strassen | Process for the production of a low alkali content cement |
| EP0061517B1 (en) * | 1981-03-31 | 1984-06-13 | BABCOCK-BSH AKTIENGESELLSCHAFT vormals Büttner-Schilde-Haas AG | Process for producing a waterproof binder |
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