CN115536291A - Alkali-activated slow-setting cementing material suitable for road engineering and preparation method thereof - Google Patents
Alkali-activated slow-setting cementing material suitable for road engineering and preparation method thereof Download PDFInfo
- Publication number
- CN115536291A CN115536291A CN202211393863.0A CN202211393863A CN115536291A CN 115536291 A CN115536291 A CN 115536291A CN 202211393863 A CN202211393863 A CN 202211393863A CN 115536291 A CN115536291 A CN 115536291A
- Authority
- CN
- China
- Prior art keywords
- alkali
- road engineering
- material suitable
- equal
- percent
- 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
- 239000000463 material Substances 0.000 title claims abstract description 47
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000003513 alkali Substances 0.000 title claims description 43
- 238000012407 engineering method Methods 0.000 title description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 57
- 239000010881 fly ash Substances 0.000 claims abstract description 28
- 239000002893 slag Substances 0.000 claims abstract description 24
- 235000011121 sodium hydroxide Nutrition 0.000 claims abstract description 19
- 239000002131 composite material Substances 0.000 claims abstract description 18
- 239000000843 powder Substances 0.000 claims abstract description 18
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 17
- 239000010440 gypsum Substances 0.000 claims abstract description 17
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 13
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 13
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000007787 solid Substances 0.000 claims abstract description 12
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- 239000012190 activator Substances 0.000 claims description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 3
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 claims description 3
- 235000010261 calcium sulphite Nutrition 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 2
- 230000000979 retarding effect Effects 0.000 claims 1
- 239000011398 Portland cement Substances 0.000 abstract description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 abstract description 2
- 230000036571 hydration Effects 0.000 abstract description 2
- 238000006703 hydration reaction Methods 0.000 abstract description 2
- 230000015271 coagulation Effects 0.000 abstract 2
- 238000005345 coagulation Methods 0.000 abstract 2
- 238000003763 carbonization Methods 0.000 abstract 1
- 230000003111 delayed effect Effects 0.000 abstract 1
- 239000004568 cement Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 238000007689 inspection Methods 0.000 description 6
- 229910004298 SiO 2 Inorganic materials 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 229910001653 ettringite Inorganic materials 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000011575 calcium Substances 0.000 description 2
- 235000012215 calcium aluminium silicate Nutrition 0.000 description 2
- 239000000404 calcium aluminium silicate Substances 0.000 description 2
- 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 2
- 229940078583 calcium aluminosilicate Drugs 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 210000004127 vitreous body Anatomy 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 229910000503 Na-aluminosilicate Inorganic materials 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000005354 aluminosilicate glass Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229940069978 calcium supplement Drugs 0.000 description 1
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 235000012217 sodium aluminium silicate Nutrition 0.000 description 1
- 239000000429 sodium aluminium silicate Substances 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000002910 solid waste Substances 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
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/28—Cements from oil shales, residues or waste other than slag from combustion residues, e.g. ashes or slags from waste incineration
-
- 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
- C04B12/005—Geopolymer cements, e.g. reaction products of aluminosilicates with alkali metal hydroxides or silicates
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/14—Cements containing slag
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
- C04B7/153—Mixtures thereof with other inorganic cementitious materials or other activators
- C04B7/21—Mixtures thereof with other inorganic cementitious materials or other activators with calcium sulfate containing activators
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/243—Mixtures thereof with activators or composition-correcting additives, e.g. mixtures of fly ash and alkali activators
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/76—Use at unusual temperatures, e.g. sub-zero
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Combustion & Propulsion (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a delayed coagulation cementing material suitable for road engineering and a preparation method thereof, and solves the problems of short coagulation time and more cracks when Portland cement is applied to road engineering in the prior art. The slow-setting cementing material consists of composite powder and an excitant, wherein the composite powder contains 50-70% of high-alumina fly ash, 8-20% of furnace bottom slag, 2-5% of desulfurized gypsum and 20-30% of slag, the excitant accounts for 10-20% of the mass of the composite powder, and the excitant consists of solid water glass and caustic soda. Compared with the traditional portland cement, the slow setting cementitious material prepared by the invention has the characteristics of long setting time and less hardened body cracks, has lower hydration heat and better corrosion resistance, freeze-thaw resistance and carbonization resistance, and is very suitable for being applied to road engineering. The cementing material also has the advantages of simple production process, investment saving, low energy consumption, little pollution and little carbon emission.
Description
Technical Field
The invention relates to the technical field of solid waste resource utilization, in particular to an alkali-activated slow-setting cementitious material suitable for road engineering and a preparation method thereof.
Background
At present, the traditional inorganic cementing material still mainly uses cement, belongs to products with high energy consumption and high pollution, and raw materials for manufacturing need to be obtained by exploiting natural limestone, and environment is seriously influenced by 'mountain-opening stone-blasting'. On the other hand, coal-fired power plants in China discharge about 5 hundred million tons of fly ash every year, 30-40% of fly ash is not utilized and is piled up to occupy land, the environment is polluted, and the carbon emission is increased. Therefore, there is a need to develop various technical approaches for the utilization of fly ash to eliminate the adverse effect of the stockpiled fly ash on the ecological environment.
The fly ash has a crystal phase and a glass phase in the structure, wherein the crystal phase mainly comprises mullite, quartz, magnetite and the like, and the glass phase consists of aluminosilicate glass containing a small amount of Fe, na, K, ca, mg and Ti and accounts for 50-80% of the total composition. The fly ash has a very low CaO content in its composition compared with blast furnace slag, and thus the fly ash itself does not have latent hydraulic properties.
The alkali-activated fly ash-based cementing material is prepared by applying an efficient alkali activator to depolymerize fly ash glass bodies and the like after calcium supplement is carried out on fly ash to generate a plurality of new cementing substances, and the new cementing substances are polymerized and developed to form a spatial three-dimensional network structure to generate strength. However, the conventional method for activating the fly ash by alkali is to use lime and the like to activate the fly ash, and the high-alumina fly ash activated by the method has slow development of strength and lower final strength, wherein the compressive strength is about 1-3 MPa in 3 days generally, the compressive strength is about 10MPa in 28 days, and the actual use value is not large.
Disclosure of Invention
The invention aims to provide an alkali-activated slow-setting cementitious material suitable for road engineering and a preparation method thereof, and solves the problems of short setting time and more cracks when portland cement is applied to road engineering in the prior art. In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides an alkali-activated slow-setting cementitious material suitable for road engineering, which consists of composite powder and an activator, wherein the composite powder comprises the following components in percentage by mass: 50-70% of high-alumina fly ash, 8-20% of bottom slag, 2-5% of desulfurized gypsum and 20-30% of slag, wherein the excitant accounts for 10-20% of the mass of the composite powder; the activator comprises solid water glass and caustic soda.
Specifically, al in the high-alumina fly ash 2 O 3 Mass fraction is more than or equal to 35 percent, siO 2 And Al 2 O 3 The sum of the mass fractions is more than or equal to 80 percent, and the mass fraction of the water is less than or equal to 1 percent.
Specifically, al in the bottom slag 2 O 3 Mass fraction is more than or equal to 30 percent, and SiO is 2 And Al 2 O 3 The sum of the mass fractions is more than or equal to 75 percent, and the mass fraction of the water is less than or equal to 1 percent.
Specifically, caSO in the desulfurized gypsum 4 ·2H 2 The mass fraction of O is more than or equal to 85 percent, the mass fraction of water is less than or equal to 2 percent, the calcium sulfite hemihydrate in the desulfurized gypsum is less than or equal to 0.5 percent, and the content of chloride ions is less than or equal to 600ppm.
Specifically, the slag meets the requirements of GB/T203-2008 standard.
Specifically, the modulus of the solid water glass is 2.0-3.0.
Specifically, the sodium hydroxide content of the caustic soda is more than or equal to 99%.
The invention also provides a preparation method of the alkali-activated slow-setting cementing material suitable for road engineering, which is used for preparing the alkali-activated slow-setting cementing material suitable for road engineering, wherein the composite powder is prepared by adding the high-alumina fly ash, the furnace bottom slag, the desulfurized gypsum and the mineral slag into a ball mill according to the mixing ratio, mixing and grinding the mixture until the oversize mass with the particle size of 45 mu m is 20-30%.
Specifically, the exciting agent is prepared by mixing solid water glass and caustic soda according to a proportion, wherein the ratio (modulus) of the mole number of silicon dioxide to the mole number of sodium hydroxide in the solid water glass and the caustic soda is 1.2-1.8.
Specifically, the alkali-activated set-retarding cementing material is prepared by uniformly mixing composite powder and an activator according to the mass ratio of 1.
Based on the technical scheme, the embodiment of the invention can at least produce the following technical effects:
(1) Compared with the traditional portland cement, the alkali-activated slow-setting cementitious material suitable for road engineering and the preparation method thereof provided by the invention have longer setting time, the initial setting time of the alkali-activated slow-setting cementitious material is 5-9 hours, and the final setting time is 6-12 hours, so that the alkali-activated slow-setting cementitious material is more suitable for large-volume construction.
(2) Compared with the traditional portland cement, the alkali-activated slow-setting cementitious material has no volume shrinkage in the hydration and hardening process, thereby ensuring the structural compactness, impermeability, frost resistance, corrosion resistance and the like.
(3) Compared with the traditional portland cement, the alkali-activated slow-setting cementing material suitable for road engineering and the preparation method thereof provided by the invention have the advantages of simple production process, low investment, low energy consumption, low pollution and low carbon emission.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The invention provides an alkali-activated slow-setting cementitious material suitable for road engineering, which consists of composite powder and an activator, and is characterized in that the composite powder comprises the following components in percentage by mass: 50-70% of high-alumina fly ash, 8-20% of bottom slag, 2-5% of desulfurized gypsum and 20-30% of slag, wherein the excitant accounts for 10-20% of the mass of the composite powder, and comprises: solid water glass and caustic soda.
The high-alumina fly ash and the slag both contain a large amount of vitreous bodies, and the vitreous bodies are depolymerized under the action of an excitant to release a large amount of active SiO 2 With Al 2 O 3 Active SiO 2 With Al 2 O 3 Reacting with free NA + to generate hydrated sodium aluminosilicate (N-A-S-H) gel, active SiO 2 With Al 2 O 3 Ca together with desulfurized gypsum and slag 2+ The reaction generates hydrated calcium aluminosilicate (C-A-S-H) gel and active Al 2 O 3 The calcium aluminate solution reacts with gypsum to generate ettringite (AFt), gel substances with different shapes form a three-dimensional spatial network structure under continuous polymerization and development, so that the strength is generated, and the micro-expansibility of the ettringite (AFt) can compensate chemical reaction shrinkage, drying shrinkage and the like, so that cracks caused by volume shrinkage can not be generated in the hardening process.
The slag and the desulfurized gypsum can provide a calcium source, ca 2+ With active SiO 2 With Al 2 O 3 Reacting to generate hydrated calcium aluminosilicate (C-A-S-H) gel; the desulfurized gypsum is also mixed with active Al 2 O 3 The reaction produces ettringite (AFt) with micro-expansibility.
The water glass and the caustic soda are hydrolyzed to generate a large amount of OH — ，OH — The existence of the catalyst provides a high-alkali environment for a reaction system, so that the fly ash and the slag are corroded and depolymerized under a strong alkali condition and release a large amount of active SiO 2 With Al 2 O 3 。
As an alternative embodiment, al in the high-alumina fly ash 2 O 3 Mass fraction is more than or equal to 35 percent, siO 2 And Al 2 O 3 The sum of the mass fractions is more than or equal to 80 percent, and the mass fraction of the water is less than or equal to 1 percent.
As an alternative embodiment, al in the bottom slag is scattered 2 O 3 Mass fraction is more than or equal to 30 percent, and SiO is 2 And Al 2 O 3 The sum of the mass fractions is more than or equal to 75 percent, and the mass fraction of the water is less than or equal to 1 percent.
As an alternative embodiment, caSO is contained in the desulfurized gypsum 4 ·2H 2 The mass fraction of O is more than or equal to 85 percent, the mass fraction of water is less than or equal to 2 percent, the mass fraction of calcium sulfite hemihydrate is less than or equal to 0.5 percent, and the content of chloride ions is less than or equal to 600ppm.
As an alternative embodiment, the solid water glass modulus is 2.0 to 3.0.
In an alternative embodiment, the caustic soda has a sodium hydroxide content of 99% or more.
As an optional implementation mode, the high-alumina fly ash, the bottom slag, the desulfurized gypsum and the slag are added into a ball mill according to a matching proportion for mixing and grinding, and the particle size of the mixed material is ground until the mass of the 45 mu m screen residue is less than or equal to 30%.
As an alternative embodiment, the solid water glass and the caustic soda are mixed in proportion so that the ratio (modulus) of the number of moles of silica to the number of moles of sodium hydroxide in the mixture is 1.2-1.8.
As an optional embodiment, the composite powder and the exciting agent are uniformly mixed according to the mass ratio of 1.1-0.2, and water is added for stirring for 3-6 minutes when the composite powder is used.
The materials used in the various embodiments described below meet the specific requirements set forth above.
Example 1
The embodiment of the invention provides an alkali-activated slow-setting cementitious material suitable for road engineering, which comprises the following specific components in parts by weight:
and detecting the initial setting time, the final setting time, the 3d and 28d compressive strengths and the 28d expansion rate of the prepared alkali-activated slow-setting cementing material by referring to a cement inspection method.
Example 2
The embodiment of the invention provides an alkali-activated set-retarding cementing material suitable for road engineering, which comprises the following specific components in parts by weight:
and detecting the initial setting time, the final setting time, the 3d and 28d compressive strengths and the 28d expansion rate of the prepared alkali-activated slow-setting cementing material by referring to a cement inspection method.
Example 3
The embodiment of the invention provides an alkali-activated set-retarding cementing material suitable for road engineering, which comprises the following specific components in parts by weight:
and detecting the initial setting time, the final setting time, the 3d and 28d compressive strengths and the 28d expansion rate of the prepared alkali-activated slow-setting cementing material by referring to a cement inspection method.
Example 4
The embodiment of the invention provides an alkali-activated slow-setting cementitious material suitable for road engineering, which comprises the following specific components in parts by weight:
and detecting the initial setting time, the final setting time, the 3d and 28d compressive strengths and the 28d expansion rate of the prepared alkali-activated slow-setting cementing material by referring to a cement inspection method.
Example 5
The embodiment of the invention provides an alkali-activated set-retarding cementing material suitable for road engineering, which comprises the following specific components in parts by weight:
and detecting the initial setting time, the final setting time, the 3d and 28d compressive strengths and the 28d expansion rate of the prepared alkali-activated slow-setting cementing material by referring to a cement inspection method.
Example 6
The embodiment of the invention provides an alkali-activated set-retarding cementing material suitable for road engineering, which comprises the following specific components in parts by weight:
and detecting the initial setting time, the final setting time, the 3d and 28d compressive strengths and the 28d expansion rate of the prepared alkali-activated slow-setting cementing material by referring to a cement inspection method.
Comparative example 1
The concrete components and the formula of the P.F42.5 fly ash portland cement are shown in the following table by taking common fly ash portland cement as a comparative example:
| material | Mass percent of |
| Portland cement clinker | 70％ |
| Fly ash | 25％ |
| Desulfurized gypsum | 5％ |
And (4) detecting the initial setting time, the final setting time, the 3d and 28d compressive strengths and the 28d expansion rate of the P.F42.5 cement according to a cement detection method.
And (3) detection results:
the above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered 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. The alkali-activated slow-setting cementing material suitable for road engineering consists of composite powder and an activator, and is characterized in that the composite powder comprises the following components in percentage by mass: 50-70% of high-alumina fly ash, 8-20% of bottom slag, 2-5% of desulfurized gypsum and 20-30% of slag, wherein the excitant accounts for 10-20% of the mass of the composite powder; the excitant comprises solid water glass and caustic soda.
2. The alkali-activated slow-setting cementitious material suitable for road engineering according to claim 1, characterized in that: al in the high-alumina fly ash 2 O 3 Mass fraction is more than or equal to 35 percent, siO 2 And Al 2 O 3 The sum of the mass fractions is more than or equal to 80 percent, and the mass fraction of the water is less than or equal to 1 percent.
3. The alkali-activated slow-setting cementitious material suitable for road engineering according to claim 1, characterized in that: al in the bottom slag 2 O 3 Mass fraction is more than or equal to 30 percent, siO 2 And Al 2 O 3 The sum of the mass fractions is more than or equal to 75 percent, and the mass fraction of the water is less than or equal to 1 percent.
4. The alkali-activated slow-setting cementitious material suitable for road engineering according to claim 1, characterized in that: caSO in the desulfurized gypsum 4 ·2H 2 The mass fraction of O is more than or equal to 85 percent, the mass fraction of water is less than or equal to 2 percent, the calcium sulfite hemihydrate in the desulfurized gypsum is less than or equal to 0.5 percent, and the content of chloride ions is less than or equal to 600ppm.
5. The alkali-activated slow-setting cementitious material suitable for road engineering according to claim 1, characterized in that: the slag meets the requirements of GB/T203-2008 standard.
6. The alkali-activated slow-setting cementitious material suitable for road engineering according to claim 1, characterized in that: the modulus of the solid water glass is 2.0-3.0.
7. The alkali-activated slow-setting cementitious material suitable for road engineering according to claim 1, characterized in that: the sodium hydroxide content of the caustic soda is more than or equal to 99 percent.
8. A preparation method of an alkali-activated slow-setting cementitious material suitable for road engineering, which is used for preparing the alkali-activated slow-setting cementitious material suitable for road engineering, and is disclosed by claims 1-7, and is characterized in that: the composite powder is prepared by adding high-alumina fly ash, furnace bottom slag, desulfurized gypsum and slag into a ball mill according to a mixing ratio, mixing and grinding until the oversize mass with the particle size of 45 mu m is 20-30%.
9. The preparation method of the alkali-activated set-retarding cementing material suitable for road engineering according to claim 8, which is characterized in that: the exciting agent is prepared by mixing solid water glass and caustic soda according to a proportion, wherein the ratio (modulus) of the mole number of silicon dioxide to the mole number of sodium hydroxide in the solid water glass and the caustic soda is 1.2-1.8.
10. The preparation method of the alkali-activated set-retarding cementing material suitable for road engineering according to claim 8, characterized in that: the alkali-activated retarding cementing material is prepared by uniformly mixing composite powder and an activator according to the mass ratio of 1.1-0.2, and adding water and stirring for 3-6 minutes when in use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211393863.0A CN115536291A (en) | 2022-11-08 | 2022-11-08 | Alkali-activated slow-setting cementing material suitable for road engineering and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211393863.0A CN115536291A (en) | 2022-11-08 | 2022-11-08 | Alkali-activated slow-setting cementing material suitable for road engineering and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115536291A true CN115536291A (en) | 2022-12-30 |
Family
ID=84721314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211393863.0A Pending CN115536291A (en) | 2022-11-08 | 2022-11-08 | Alkali-activated slow-setting cementing material suitable for road engineering and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115536291A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101642039B1 (en) * | 2016-02-11 | 2016-07-22 | 에코플러스 주식회사 | A composite of eco-friendly binding materials with low CO2 emission property by using waste resources, steam cured cement mortar and stem cured concrete composite comprising the same |
| CN106380167A (en) * | 2016-08-30 | 2017-02-08 | 卓达新材料科技集团威海股份有限公司 | Alkali-activated fly ash cementing material and preparation method thereof |
| CN107285675A (en) * | 2017-08-04 | 2017-10-24 | 华东理工常熟研究院有限公司 | A kind of method for adjusting the geo-polymer initial condensation time |
| CN113087431A (en) * | 2021-03-26 | 2021-07-09 | 武汉理工大学 | Retarder of alkali-activated cementing material |
| CN114702294A (en) * | 2022-04-02 | 2022-07-05 | 山东高速工程检测有限公司 | Solid waste based super-retarding cementing material and preparation method and application thereof |
-
2022
- 2022-11-08 CN CN202211393863.0A patent/CN115536291A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101642039B1 (en) * | 2016-02-11 | 2016-07-22 | 에코플러스 주식회사 | A composite of eco-friendly binding materials with low CO2 emission property by using waste resources, steam cured cement mortar and stem cured concrete composite comprising the same |
| CN106380167A (en) * | 2016-08-30 | 2017-02-08 | 卓达新材料科技集团威海股份有限公司 | Alkali-activated fly ash cementing material and preparation method thereof |
| CN107285675A (en) * | 2017-08-04 | 2017-10-24 | 华东理工常熟研究院有限公司 | A kind of method for adjusting the geo-polymer initial condensation time |
| CN113087431A (en) * | 2021-03-26 | 2021-07-09 | 武汉理工大学 | Retarder of alkali-activated cementing material |
| CN114702294A (en) * | 2022-04-02 | 2022-07-05 | 山东高速工程检测有限公司 | Solid waste based super-retarding cementing material and preparation method and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| 余丽武主编: "《土木工程材料》", vol. 1, 东南大学出版社, pages: 29 - 30 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Jiang et al. | A critical review of waste glass powder–Multiple roles of utilization in cement-based materials and construction products | |
| TWI491579B (en) | A cementation method of low calcium fly ash in room temperature | |
| CN110746165A (en) | Ocean engineering repair mortar and preparation method thereof | |
| WO2022096961A1 (en) | High performance hybrid fly ash/calcium aluminate cementitious compositions for mortars and concretes | |
| CN105174887A (en) | Modified desulphurization gypsum-based mater batch and preparation method therefor | |
| CN112028579A (en) | Ceramic polishing slag-based foam light soil and preparation method and application thereof | |
| CN109399975B (en) | Red mud sulfur fixation ash steel slag powder coupling excitation cementing material and application thereof | |
| CN111847921B (en) | Low clinker cement and preparation method and application thereof | |
| CN114988791B (en) | Flue grouting material doped with sulfur-rich lithium slag, and preparation method and application thereof | |
| WO2018150753A1 (en) | Geopolymer composition, and mortar and concrete using same | |
| CN101885589A (en) | Compound sulfate cement | |
| CN104817286B (en) | Preparation method of full-tailing consolidation discharge cementing agent | |
| CN114591061B (en) | Low-carbon road concrete with steel slag as aggregate and preparation method thereof | |
| CN101412595A (en) | Method for preparing concrete admixture from kaoline tailing | |
| CN113929330A (en) | Method for obtaining matrix solid-waste ratio and preparing alkali-activated cementing material | |
| CN111517729B (en) | Sleeve grouting material for connecting steel bars of fabricated building | |
| CN108947427A (en) | A kind of facing mortar and its preparation and application | |
| CN114804807B (en) | Full-solid waste soft foundation sludge solidified powder and preparation method thereof | |
| CN110615660A (en) | Method for preparing pavement rapid repair material by utilizing waste incineration fly ash | |
| CN115536291A (en) | Alkali-activated slow-setting cementing material suitable for road engineering and preparation method thereof | |
| CN116409948A (en) | Low-carbon composite cementing material based on regenerated micro powder, and preparation method and application thereof | |
| CN114014568A (en) | Low-alkali cement special for railway and bridge construction and preparation method thereof | |
| CN113716914A (en) | High-flow concrete with slate aggregate and preparation method thereof | |
| CN110981257A (en) | Alkali-free and chlorine-free concrete accelerator based on magnesium carbonate trihydrate | |
| CN109503084A (en) | A kind of C45P6 subway concrete and preparation method thereof |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20221230 |