CN115806397A - Binary alkali-activated cementing material resistant to sulfate-magnesium salt composite corrosion and preparation method thereof - Google Patents
Binary alkali-activated cementing material resistant to sulfate-magnesium salt composite corrosion and preparation method thereof Download PDFInfo
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- CN115806397A CN115806397A CN202211667072.2A CN202211667072A CN115806397A CN 115806397 A CN115806397 A CN 115806397A CN 202211667072 A CN202211667072 A CN 202211667072A CN 115806397 A CN115806397 A CN 115806397A
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- sodium silicate
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- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 title claims abstract description 54
- 239000002131 composite material Substances 0.000 title claims abstract description 48
- 239000000463 material Substances 0.000 title claims abstract description 47
- 238000005260 corrosion Methods 0.000 title claims abstract description 34
- 230000007797 corrosion Effects 0.000 title claims abstract description 34
- 239000003513 alkali Substances 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title description 6
- 238000002156 mixing Methods 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 24
- 239000004115 Sodium Silicate Substances 0.000 claims description 20
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 20
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 20
- 238000003756 stirring Methods 0.000 claims description 18
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 6
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 6
- 239000010881 fly ash Substances 0.000 claims description 5
- 159000000003 magnesium salts Chemical class 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 239000012190 activator Substances 0.000 claims description 4
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 4
- 239000000292 calcium oxide Substances 0.000 claims description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 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
- 238000000034 method Methods 0.000 claims description 4
- 239000002893 slag Substances 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 3
- 230000032683 aging Effects 0.000 claims description 2
- 238000013329 compounding Methods 0.000 claims description 2
- XUIMIQQOPSSXEZ-NJFSPNSNSA-N silicon-30 atom Chemical compound [30Si] XUIMIQQOPSSXEZ-NJFSPNSNSA-N 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 2
- 229910052943 magnesium sulfate Inorganic materials 0.000 abstract description 16
- 235000019341 magnesium sulphate Nutrition 0.000 abstract description 16
- 238000012360 testing method Methods 0.000 description 17
- 230000003628 erosive effect Effects 0.000 description 10
- 239000000126 substance Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 230000006378 damage Effects 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 238000010298 pulverizing process Methods 0.000 description 3
- 238000001878 scanning electron micrograph Methods 0.000 description 3
- 238000002791 soaking Methods 0.000 description 3
- 239000002910 solid waste Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- JLDKGEDPBONMDR-UHFFFAOYSA-N calcium;dioxido(oxo)silane;hydrate Chemical compound O.[Ca+2].[O-][Si]([O-])=O JLDKGEDPBONMDR-UHFFFAOYSA-N 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Images
Classifications
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- 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
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- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The raw materials for preparing the gel material comprise a composite auxiliary gel material, a composite exciting agent and mixing water, and the mass ratio of the raw materials is 1 (0.2-0.4) to 0.2-0.4. After the binary alkali-activated cementing material prepared by the invention is corroded by 30d and 60d 5% magnesium sulfate solutions, the rupture strength loss is almost avoided and even the rupture strength is enhanced; after the corrosion of 120d of 5% magnesium sulfate solution, the loss of flexural strength can be controlled below 15%, and the binary alkali-activated gelled material has stronger sulfate-magnesium salt composite corrosion resistance.
Description
Technical Field
The invention relates to the technical field of solid waste resource utilization, in particular to a binary alkali-activated cementing material for resisting composite corrosion of sulfate-magnesium salt.
Background
Portland cement is used as the most common building cementing material, and the production process has high energy consumption and CO 2 The discharge amount is large, the environmental pollution is serious, the durability of the silicate material is generally poor, the silicate material is easy to degrade in a complex service environment, the bearing capacity is reduced, even the structure fails, and the like, and the carbon reduction index is difficult to meet. The alkali-activated cementing material is a green cementing material which takes industrial solid wastes such as mineral powder, fly ash and the like as raw materials, adopts an alkali activator to activate the activity of the raw materials and accelerates the reaction to form gel, and is generally superior to a common silicate cementing material in the aspect of durability. Therefore, the method has higher environmental benefit, economic benefit and social benefit aiming at the research of preparing the alkali-activated cementing material by taking industrial solid wastes as raw materials.
The research at present generally considers that the sulfate is the salt which has the greatest harm to the concrete. The erosion action of sulfate on concrete is mainly divided into physical damage and chemical corrosion, wherein the physical damage is that sulfate is crystallized in pores to generate larger expansion stress to cause cracking of a cement-based material; the chemical erosion is that sulfate reacts with hydration products of cement-based materials to generate expansion products, the volume of the expansion products is increased by several times, and larger crystallization pressure is generated to cause cracking and destruction of hardened set cement structures. In addition, magnesium salts can react with calcium silicate hydrate (C-S-H) to cause decalcification and decomposition of C-S-H, thereby destroying its gelling property. Thus, sulfate-magnesium salt composite attack is more detrimental to concrete than is sulfate attack alone. Therefore, research on the sulfate-magnesium salt composite corrosion resistance of the cementing material is increasingly important. In view of the above, the invention provides a binary alkali-activated cementing material resistant to sulfate-magnesium salt composite corrosion and a preparation method thereof, so as to provide support for application research of the alkali-activated cementing material.
Disclosure of Invention
In order to solve the problems, the invention provides a binary alkali-activated cementing material for resisting composite corrosion of sulfate and magnesium salt, which has the specific technical scheme that:
the binary alkali-activated cementing material for resisting composite corrosion of sulfate-magnesium salt comprises a composite auxiliary cementing material, a composite activator and mixing water, wherein the mass ratio of the raw materials is 1 (0.2-0.4) to 0.2-0.4.
Further, the composite auxiliary cementing material is prepared by mixing any two of slag powder, fly ash or metakaolin, and the mass ratio of the two is 1.
Further, the main component ranges of the slag powder are 35-45% of calcium oxide, 20-30% of silicon oxide and 10-20% of aluminum oxide;
the main component ranges of the fly ash are 3-7% of calcium oxide, 40-50% of silicon oxide and 30-40% of aluminum oxide;
the main component ranges of the metakaolin are 40-50% of silicon oxide and 40-50% of aluminum oxide.
Further, the compound excitant is formed by compounding sodium silicate and sodium hydroxide, the modulus of the sodium silicate is 2.0-3.0, the concentration of the sodium silicate is 45-55 Be, and the sodium hydroxide is a flaky solid.
Further, the compound excitant is obtained by adjusting the modulus of sodium silicate to 1.3-1.7 by using sodium hydroxide.
A preparation method of a binary alkali-activated cementing material resistant to sulfate-magnesium salt composite corrosion comprises the following steps:
(1) Adding flaky sodium hydroxide into sodium silicate with the modulus of 2.0-3.0, transferring the sodium silicate into an ultrasonic cleaning machine, ultrasonically stirring the sodium silicate until the sodium silicate is completely dissolved, adjusting the modulus of the sodium silicate to 1.3-1.7, and aging the sodium silicate for 12-18 hours to obtain a composite excitant;
(2) Adding the composite exciting agent into mixing water, and fully stirring and dispersing;
(3) And (3) respectively and sequentially adding mixing water, a composite exciting agent and a composite auxiliary cementing material into the stirring pot, and slowly stirring for 2min, stopping stirring for 15s and quickly stirring for 2min by using a cement paste stirring machine to obtain the binary alkali-excited cementing material resisting the composite corrosion of the sulfate and the magnesium salt.
Has the beneficial effects that:
after the binary alkali-activated cementing material prepared by the invention is corroded by 5% magnesium sulfate solutions of 30d and 60d, the flexural strength loss is hardly caused, and even the flexural strength is enhanced; after the corrosion of 120d of 5% magnesium sulfate solution, the loss of flexural strength can be controlled below 15%, and the binary alkali-activated binding material has stronger sulfate-magnesium salt composite corrosion resistance.
Drawings
FIG. 1 is an SEM image of a sample soaked for 120d according to example 1 of the present invention.
FIG. 2 is an SEM image of a sample soaked in 120d of example 2 according to the present invention.
FIG. 3 is an SEM image of a sample soaked in 120d of example 3 according to the present invention.
Detailed Description
The invention is further described below with reference to specific examples:
in order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the examples of the present invention will be fully described below with reference to the present invention, but the described examples are only a part of the examples of the present invention, and not all examples. Based on the examples in the present invention, other examples obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.
In order to verify the sulfate-magnesium salt composite corrosion resistance of the binary alkali-activated binding material, a sample is prepared according to the mixing proportion, a standard sample maintained for 28d is taken for a sulfate-magnesium salt corrosion test, the corrosion solution is a magnesium sulfate solution with the mass fraction of 5%, the breaking strength of the sample after soaking and corrosion for 30d, 60d and 120d is respectively measured, and the breaking and corrosion resistance coefficient K is calculated according to the formula (1):
in the formula: f. of M The flexural strength of the sample is maintained in 5% magnesium sulfate erosion solution; f. of w The flexural strength of the test specimen was maintained in water.
Example 1:
the method comprises the following steps of weighing the following components in a mixing ratio of m (composite auxiliary cementing material) to m (composite exciting agent) to m (mixing water) =1: 0.3.
Sequentially adding mixing water, a composite activator and a composite auxiliary cementing material into a stirring pot, slowly stirring for 2min by using a cement paste mixer, stopping stirring for 15s, quickly stirring for 2min, pouring the paste into a mould of 40mm multiplied by 160mm, compacting on a vibration table until no bubbles emerge, then placing into a standard curing box, curing for 24h, and then removing the mould; after the molded neat paste test piece is maintained to 28 days, dividing the clean paste test piece into two groups, and respectively placing the two groups of clean paste test pieces in water and 5% magnesium sulfate erosion solution to perform a full-soaking sulfate-magnesium salt composite erosion resistance test; the top of the container was covered with a preservative film to keep the liquid level constant and the magnesium sulfate solution was changed every week. In the soaking process, sulfuric acid (1 + 5) is used to titrate the sulfate erosion solution once a day until the pH value is about 7 so as to neutralize Ca (OH) precipitated in the test piece 2 . And (3) taking out the samples after the corrosion ages reach 30d, 60d and 120d, respectively measuring the flexural strength of the alkali-activated cementing material, and calculating the flexural and corrosion resistance coefficient of the samples according to the formula (1).
The flexural strength of the samples after curing in water for 30d, 60d and 120d is 6.5MPa, 9.8MPa and 10.0MPa respectively, the corrosion flexural strength of the samples after curing in 5% magnesium sulfate solution for 30d, 60d and 120d is 6.8MPa, 9.6MPa and 8.6MPa respectively, and the flexural and corrosion resistance coefficients of the samples 30d, 60d and 120d are 1.05, 0.98 and 0.86 respectively according to the formula (1).
And observing the appearance of the sample corroded by the magnesium sulfate for 120 days, wherein crystalline substances are separated out from the surface of the sample, no obvious crack is observed, the edge angle basically keeps complete, and no pulverization phenomenon is found.
The SEM test was performed on a central test block of the 120d etched sample, and the results are shown in FIG. 1. As can be seen from figure 1, when the erosion age is 120d, sulfate crystallization cannot be observed in the sample, a large amount of gelatinous hydration products can be observed to be aggregated together, no obvious crack is observed, the microstructure is compact, and the sample has better sulfate-magnesium salt composite erosion resistance.
Experimental example 2:
the components are respectively weighed according to the mixing ratio m (composite auxiliary cementing material), m (composite exciting agent) and m (mixing water) = 0.3.
The sample preparation, maintenance and etching were performed as in example 1. The flexural strengths of the samples after curing in water for 30d, 60d and 120d were 10.9MPa, 9.4MPa and 14.1MPa respectively, the erosion flexural strengths of the samples after curing in 5% magnesium sulfate solution for 30d, 60d and 120d were 13.4MPa, 10.6MPa and 12.6MPa respectively, and the flexural corrosion resistance coefficients of the samples 30d, 60d and 120d were 1.23, 1.13 and 0.89 respectively, as calculated according to the formula (1).
And observing the appearance of the sample corroded by the magnesium sulfate for 120d, wherein the appearance of the sample is not obviously changed after the sample is corroded for 120d, the edge angle is kept intact, no obvious crack is found, a crystalline substance is separated out on the surface of the test piece, and the pulverization phenomenon is hardly observed.
The SEM test was performed on a central test block of the 120d etched sample, and the results are shown in FIG. 2. As can be seen from FIG. 2, after the corrosion period of 120d, a large amount of gel aggregation can be observed, the microstructure is dense, obvious cracks are hardly observed, and the sulfate-magnesium salt composite corrosion resistance of the sample is good.
Example 3:
the components are respectively weighed according to the mixing ratio m (composite auxiliary cementing material), m (composite exciting agent) and m (mixing water) = 0.3.
The sample preparation, maintenance and etching were performed as in example 1. The flexural strengths of the samples after curing in water for 30d, 60d and 120d were 8.5MPa, 9.2MPa and 12.8MPa respectively, the erosion flexural strengths of the samples after curing in 5% magnesium sulfate solution for 30d, 60d and 120d were 9.3MPa, 10.2MPa and 11.7MPa respectively, and the flexural corrosion resistance coefficients of the samples 30d, 60d and 120d were 1.09, 1.11 and 0.91 respectively, as calculated according to the formula (1).
And observing the appearance of the test sample corroded by the magnesium sulfate for 120d, wherein the test sample is hardly pulverized after being corroded for 120d, the edge angle is kept well, crystalline substances are separated out from the surface of the test sample, and no obvious crack is found.
SEM test was performed on the central test block of 120d samples, and the results are shown in FIG. 3. As can be seen from FIG. 3, no sulfate crystallization is observed on the sample corroded by 120d, no obvious cracks or holes are formed, the phenomena of sulfate and magnesium corrosion cracking and pulverization are not found, and the sample has better sulfate-magnesium composite corrosion resistance.
As can be seen from examples 1 to 3, the prepared binary alkali-activated binding material has almost no loss of flexural strength and even is enhanced after being corroded by 5% magnesium sulfate solutions of 30d and 60 d; and after the corrosion of a 120d 5% magnesium sulfate solution, the breaking strength loss can be controlled below 15%, which shows that the binary alkali-activated binding material has stronger sulfate-magnesium salt composite corrosion resistance.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A binary alkali-activated cementing material resisting composite corrosion of sulfate-magnesium salt is characterized in that: the raw materials for preparing the gel material comprise a composite auxiliary cementing material, a composite exciting agent and mixing water, and the mass ratio of the raw materials is 1 (0.2-0.4) to 0.2-0.4.
2. The binary alkali-activated cementitious material resistant to complex attack by sulfate-magnesium salts as claimed in claim 1, wherein: the composite auxiliary cementing material is prepared by mixing any two of slag powder, fly ash or metakaolin, and the mass ratio of the two is 1.
3. The binary alkali-activated cementitious material resistant to composite attack by sulfate-magnesium salts according to claim 2, characterised in that: the slag powder mainly comprises 35-45% of calcium oxide, 20-30% of silicon oxide and 10-20% of aluminum oxide;
the main component ranges of the fly ash are 3-7% of calcium oxide, 40-50% of silicon oxide and 30-40% of aluminum oxide;
the main component range of the metakaolin is 40-50% of silicon oxide and 40-50% of aluminum oxide.
4. The binary alkali-activated cementitious material resistant to complex attack by sulfate-magnesium salts as claimed in claim 1, wherein: the composite excitant is formed by compounding sodium silicate and sodium hydroxide, the modulus of the sodium silicate is 2.0-3.0, the concentration of the sodium silicate is 45-55 Be, and the sodium hydroxide is a flaky solid.
5. The binary alkali-activated cementitious material resistant to composite attack by sulfate-magnesium salts according to claim 4, characterised in that: the compound excitant is obtained by adjusting the modulus of sodium silicate to 1.3-1.7 by using sodium hydroxide.
6. The method for preparing the binary alkali-activated cementing material resisting the composite corrosion of sulfate and magnesium salt as described in any one of the claim 1 to 5, comprising the following steps:
(1) Adding flaky sodium hydroxide into sodium silicate with the modulus of 2.0-3.0, transferring the sodium silicate into an ultrasonic cleaning machine, ultrasonically stirring the sodium silicate until the sodium silicate is completely dissolved, adjusting the modulus of the sodium silicate to 1.3-1.7, and aging the sodium silicate for 12-18 hours to obtain a composite excitant;
(2) Adding the composite activator into mixing water, and fully stirring and dispersing;
(3) And (3) respectively and sequentially adding mixing water, a composite exciting agent and a composite auxiliary cementing material into the stirring pot, and slowly stirring for 2min, stopping stirring for 15s and quickly stirring for 2min by using a cement paste stirring machine to obtain the binary alkali-excited cementing material resisting the composite corrosion of the sulfate and the magnesium salt.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1699252A (en) * | 2005-04-30 | 2005-11-23 | 华南理工大学 | Alkali-activated-carbonate/slag compound gel material and preparation method thereof |
| CN102875039A (en) * | 2012-09-26 | 2013-01-16 | 西安建筑科技大学 | Method for improving strength of sodium hydroxide-excited slag cementitious material by magnesium sulfate solution |
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| WO2018028225A1 (en) * | 2016-08-12 | 2018-02-15 | 卓达新材料科技集团威海股份有限公司 | Fly ash based geopolymer grouting material and preparation method therefor |
| CN112979191A (en) * | 2019-12-13 | 2021-06-18 | 湖北工业大学 | Alkali-activated cementing material and preparation method thereof |
-
2022
- 2022-12-22 CN CN202211667072.2A patent/CN115806397A/en active Pending
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|---|---|---|---|---|
| CN1699252A (en) * | 2005-04-30 | 2005-11-23 | 华南理工大学 | Alkali-activated-carbonate/slag compound gel material and preparation method thereof |
| CN102875039A (en) * | 2012-09-26 | 2013-01-16 | 西安建筑科技大学 | Method for improving strength of sodium hydroxide-excited slag cementitious material by magnesium sulfate solution |
| CN102910882A (en) * | 2012-11-08 | 2013-02-06 | 沈阳建筑大学 | Fiber-reinforced alkali-activated cementing material and preparation method thereof |
| WO2018028225A1 (en) * | 2016-08-12 | 2018-02-15 | 卓达新材料科技集团威海股份有限公司 | Fly ash based geopolymer grouting material and preparation method therefor |
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