Alkali-activated cementitious compositions and uses thereof

Abstract

The application provides an alkali-activated cementitious composition and applications thereof. The alkali-activated cementitious composition of the application comprises a cementitious material, an alkali-activator and a retarder, wherein the retarder comprises one or more of the organic silicon compounds represented by the following formulae I-1 to I-4. The alkali-activated cementitious material prepared from the alkali-activated cementitious composition of the application not only has suitable initial and final setting times, but also has a higher compressive strength.

Description

Technical Field

[0001] This invention relates to the field of building materials technology, specifically to an alkali-activated gelling composition and its application. Background Technology

[0002] Alkali-activated cementitious materials are a new type of low-carbon cementitious material composed of two components: an alkali activator and a cementitious precursor. They have excellent mechanical properties and durability. However, the setting time of alkali-activated cementitious materials is usually too short to meet the needs of actual construction. Therefore, it is necessary to add a retarder to adjust the setting time of alkali-activated cementitious material products.

[0003] Retarder is an additive that reduces the hydration reaction rate and heat of hydration of cementitious materials such as cement, thereby prolonging the setting time. Although there is a wide variety of retarders available and related research is relatively in-depth, most studies focus on silicate cement-based products. There are fewer products specifically designed for alkali-activated cementitious materials. In research on retarders that can be used in alkali-activated cementitious material systems, the main components include borax or other boron-containing inorganic substances, phosphates, sodium gluconate, zinc salts, barium salts, etc. For example, CN113087431A discloses a retarder for alkali-activated cementitious materials, using sulfates and sulfoaluminates as retarders in slag-fly ash systems to replace part of the slag-fly ash, effectively prolonging the initial and final setting times of alkali-activated cementitious materials. CN115321857A discloses a retarder for alkali-activated cementitious materials, using borax as a retarder in slag-fly ash systems, effectively prolonging the initial and final setting times of alkali-activated cementitious materials.

[0004] Existing retarders, while extending the setting time of cementitious materials, often lead to reduced strength and increased brittleness, which is detrimental to the long-term strength development of materials. Therefore, it is necessary to develop more new retarders that can effectively extend the setting time of alkali-activated cementitious materials and their products without significantly affecting their compressive strength. Summary of the Invention

[0005] To address one of the aforementioned technical problems in the prior art, the present invention provides an alkali-activated gelling composition and its application. Furthermore, the present invention also provides a general formula R... 2(4-n) Si(OR1) n The application of organosilicon compounds or combinations thereof in the preparation of alkali-activated cementitious materials.

[0006] A first aspect of the present invention provides an alkali-activated gelling composition comprising a gelling material, an alkali activator, and a retarder, wherein the retarder comprises a compound of the general formula R. 2(4-n) Si(OR1) nThe organosilicon compound or a combination thereof; wherein n is 1, 2, 3 or 4; R1 is independently selected from C1-C4 alkyl, C1-C4 alkyl substituted with one or more C1-C4 alkoxy groups, R2 is independently selected from substituted or unsubstituted C1-C10 alkyl, substituted or unsubstituted C2-C10 alkenyl, and when R2 contains a substituent, the substituent is one or more, and each is independently selected from C2-C10 alkenyl, C1-C10 alkoxy, C3-C10 cycloalkyl, C2-C10 oxygen-containing heterocyclic group, C6-C15 aryl, -NR a R b -N + (R c (R) d (R) e )X - , hydroxyl, mercapto, ether bond, thiocyanate, -NCO, C2-C10 ester group, carboxyl group, acid anhydride, and combinations thereof, R a and R b Each is independently selected from hydrogen, C1-C10 straight-chain or branched alkyl groups; R c R d and R e Each is independently selected from C1-C10 straight-chain or branched alkyl groups, X - It represents anion.

[0007] According to some embodiments of the present invention, R1 is independently selected from C1-C4 alkyl groups.

[0008] According to some embodiments of the present invention, R1 is independently selected from C1-C4 alkyl groups substituted with one or more methoxy, ethoxy, or propoxy substituents.

[0009] According to some embodiments of the present invention, the retarder comprises one or more organosilicon compounds represented by formulas I-1 to I-4:

[0010]

[0011] Among them, R 1a R 1b R 1c and R 1d The definition is the same as the definition of R1 mentioned above in this invention; R 2a R 2b and R 2c The definition is the same as the definition of R2 mentioned above in this invention.

[0012] In some implementations, R 1a R 1b R 1cand R 1d Independently selected from methyl, ethyl, propyl, isopropyl, and methoxyethyl. In some embodiments, R 1a R 1b R 1c and R 1d It is independently selected from methyl, ethyl, propyl, and isopropyl.

[0013] In some implementations, R 2a R 2b and R 2c Independently selected from substituted or unsubstituted C1-C10 alkyl groups and substituted or unsubstituted C2-C10 alkenyl groups; and when R 2a R 2b and R 2c When substituents are present, the substituents are one or more, and each is independently selected from C2-C10 alkenyl, C1-C10 alkoxy, C3-C10 cycloalkyl, C2-C10 oxygen-containing heterocyclic, C6-C10 aryl, -NR a R b -N + (R c (R) d (R) e )X - , hydroxyl, mercapto, ether bond, thiocyanate, -NCO, C2-C10 ester group, carboxyl group, acid anhydride, and combinations thereof, R a and R b Each is independently selected from hydrogen, C1-C6 straight-chain or branched alkyl groups; R c R d and R e Independently selected from C1-C6 straight-chain or branched alkyl groups, X - The anions are selected from the following acid radicals produced when the acids ionize: hydrochloric acid, hydrobromic acid, hydroiodic acid, sulfuric acid, maleic acid, succinic acid, citric acid, fumaric acid, salicylic acid, L-tartaric acid, fumaric acid, acetic acid, nitric acid, phosphoric acid, oxalic acid, lactic acid, lysine, and aspartic acid.

[0014] In some implementations, R c R d and R e Alkyl groups independently selected from C1-C4 straight-chain or branched alkyl groups, such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, etc. As a non-limiting example, -N + (R c (R) d (R) e )X - It can represent trimethylammonium chloride group, trimethylammonium bromide group, triethylammonium chloride group, triethylammonium bromide group, etc.

[0015] According to some embodiments of the present invention, in formulas I-1 to I-4, R 2a R 2b and R 2c Independently selected from substituted or unsubstituted C1-C6 alkyl, substituted or unsubstituted C2-C6 alkenyl, and when R 2a R 2b and R 2c When substituents are present, the substituents are one or more, and each is independently selected from C2-C6 alkenyl, C1-C6 alkoxy, C3-C6 cycloalkyl, C2-C6 oxygen-containing heterocyclic, -NR a R b , mercapto, ether bond, phenyl, thiocyanate, -NCO, C2-C6 ester group, carboxyl group, acid anhydride, and combinations thereof, R a and R b Each is independently selected from hydrogen, C1-C4 straight-chain or branched alkyl groups.

[0016] According to some embodiments of the present invention, in formulas I-1 to I-4, R 2a R 2b and R 2c Independently selected from substituted or unsubstituted C1-C4 alkyl, substituted or unsubstituted C2-C4 alkenyl, and when R 2a R 2b and R 2c When substituents are present, the substituents are one or more, and each is independently selected from C2-C4 alkenyl, C1-C4 alkoxy, C3-C6 cycloalkyl, C2-C4 oxygen-containing heterocyclic, -NR a R b , mercapto, ether bond, phenyl, thiocyanate, -NCO, C2-C6 ester group, carboxyl group, acid anhydride, and combinations thereof, R a and R b Each is independently selected from hydrogen, C1-C4 straight-chain or branched alkyl groups.

[0017] According to some embodiments of the present invention, in formulas I-1 to I-4, R 2a R 2b and R 2c Independently selected from the following groups, whether substituted or unsubstituted: methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, vinyl, propenyl, isopropenyl; and when R 2a R 2b and R 2c When substituents are present, the substituents are one or more, and each is independently selected from vinyl, propenyl, methoxy, ethoxy, propoxy, isopropoxy, butoxy, etc. Amino, mercapto, phenyl, thiocyanate, -NCO, CH2=C(CH3)COO-, and combinations thereof.

[0018] According to some embodiments of the present invention, in formulas I-1 to I-4, R1 is methyl or ethyl.

[0019] According to some embodiments of the present invention, in formulas I-1 to I-4, R2 is methyl or ethyl.

[0020] According to some embodiments of the present invention, in formulas I-1 to I-4, R1 and R2 are both methyl groups.

[0021] According to some embodiments of the present invention, in formulas I-1 to I-4, R 2a R 2b and R 2c Independently selected from substituted or unsubstituted methyl, substituted or unsubstituted ethyl, substituted or unsubstituted propyl, substituted or unsubstituted vinyl, when R 2a R 2b and R 2c When substituents are present, the substituents are one or more, and each is independently selected from vinyl, propenyl, and other groups. Amino, mercapto, phenyl, thiocyanate, -NCO, CH2=C(CH3)COO-, and combinations thereof.

[0022] According to some embodiments of the present invention, the retarder is selected from organosilicon compounds or combinations thereof represented by formulas I-1 to I-3 above.

[0023] According to some embodiments of the present invention, the retarder includes methoxytrimethylsilane, dimethoxydimethylsilane, trimethoxymethylsilane, tetramethoxysilane, ethoxytrimethylsilane, diethoxydimethylsilane, triethoxymethylsilane, tetraethoxysilane, propyltrimethoxysilane, propyltriethoxysilane, isobutyltrimethoxysilane, isobutyltriethoxysilane, 3-aminopropyltriethoxysilane, 3-aminopropyltrimethoxysilane, 3-aminopropylmethyldiethoxysilane, 3-aminopropylmethyldimethoxysilane, aminoethylaminopropyltrimethoxysilane, aminoethylaminopropyltriethoxysilane, aminoethylaminopropylmethyldimethoxysilane, aminoethylaminopropylmethyldimethoxysilane, aminoethylaminopropylmethyldiethoxysilane, and diethylaminomethyltriethoxysilane. One or more of the following: diethylaminopropyltrimethoxysilane, 3-glycidyl etheroxypropyltrimethoxysilane, 3-glycidyl etheroxypropyltriethoxysilane, 3-glycidyl etheroxypropylmethyldiethoxysilane, 3-glycidyl etheroxypropylmethyldiethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, vinyltri(2-methoxyethoxy)silane, vinyltriisopropoxysilane, vinyldimethylethoxysilane, vinylmethyldiethoxysilane, vinylmethyldimethoxysilane, mercaptopropyltrimethoxysilane, mercaptopropyltriethoxysilane, mercaptopropylmethyldimethoxysilane, phenyltriethoxysilane, 3-thiocyanopropyltriethoxysilane, isocyanatepropyltriethoxysilane, and methacryloxypropyltriethoxysilane.

[0024] According to some embodiments of the present invention, the retarder includes one or more of the following: methoxytrimethylsilane, dimethoxydimethylsilane, trimethoxymethylsilane, tetramethoxysilane, 3-glycidyl etheroxypropyltriethoxysilane, methyl vinyldiethoxysilane, mercaptopropyltriethoxysilane, triethoxyaminopropylsilane, phenyltriethoxysilane, 3-thiocyanopropyltriethoxysilane, propyl isocyanatetriethoxysilane, and methacryloxypropyltriethoxysilane.

[0025] According to some embodiments of the invention, the retarder accounts for 1%-10% of the weight of the cementitious material, for example, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10% or any value between therewith, preferably 3%-8%, more preferably 4-6%. In some embodiments, the retarder accounts for 5% of the weight of the cementitious material.

[0026] According to some embodiments of the present invention, the organosilicon compound accounts for 1%-10% of the weight of the cementitious material, for example 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10% or any value between therewith, preferably 3%-8%, more preferably 4-6%. In some embodiments, the organosilicon compound accounts for 5% of the weight of the cementitious material.

[0027] According to some embodiments of the present invention, the alkali activator accounts for 1%-80% of the weight of the cementitious material, for example, 1%, 2%, 4%, 6%, 8%, 10%, 12%, 15%, 20%, 22%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, or any value between therewith. In some embodiments, the alkali activator accounts for 4-50% of the weight of the cementitious material. In some embodiments, the alkali activator accounts for 5-25% of the weight of the cementitious material. In some embodiments, the alkali activator accounts for 5%-12% of the weight of the cementitious material.

[0028] According to some embodiments of the present invention, the alkali activator contains alkali metals in the form of M... Ⅰ Based on 2O (M = Na, K), the content is between 10-90% (mass ratio); the alkaline earth metal content is expressed as M. Ⅱ Based on O (M = Ca, Mg), the content is between 10-90% (mass ratio).

[0029] In this invention, the cementing material includes, but is not limited to, one or more of the following: metallurgical slag, mineral powder, fly ash, steel slag, volcanic ash, metakaolin, and cement. In some embodiments, the cementing material includes mineral powder. In some embodiments, the cementing material includes mineral powder and a combination of one or more of metakaolin, fly ash, steel slag, and silicate cement. In some embodiments, the cementing material includes mineral powder. In some embodiments, the cementing material includes mineral powder and metakaolin. In some embodiments, the mass ratio of mineral powder to metakaolin in the cementing material is 1:(0.5-1.5), preferably 1:(0.8-1.2), more preferably 1:1. In some embodiments, the cementing material includes mineral powder and fly ash. In some embodiments, the mass ratio of mineral powder to fly ash in the cementing material is 1:(0.5-1.5), preferably 1:(0.8-1.2), for example, 1:1. In some embodiments, the cementitious material includes mineral powder, silicate cement, and fly ash; preferably, the mass ratio of mineral powder, silicate cement, and fly ash in the cementitious material is 1:(0.3-0.5):(0.5-0.7), for example, 1:0.4:0.6. In some embodiments, the cementitious material includes mineral powder, steel slag, and fly ash; preferably, the mass ratio of mineral powder, steel slag, and fly ash in the cementitious material is 1:(0.5-1.5):(0.1-0.8), for example, 1:1:0.5.

[0030] In this invention, the alkali activator includes, but is not limited to, one or more of the following: alkali metal oxides, alkaline earth metal oxides, alkali metal hydroxides, alkaline earth metal hydroxides, alkali metal salts, and alkaline earth metal salts. In some embodiments, the alkali activator includes one or more of the following: alkali metal carbonates, alkali metal sulfates, alkali metal silicates, alkali metal aluminates, alkali metal formates, alkali metal acetates, alkali metal hydroxides, alkaline earth metal carbonates, alkaline earth metal sulfates, alkaline earth metal silicates, alkaline earth metal aluminates, alkaline earth metal formates, alkaline earth metal acetates, and alkaline earth metal hydroxides. In some embodiments, the alkali activator includes one or more of the following: sodium hydroxide, sodium silicate, sodium carbonate, sodium sulfate, and calcium hydroxide. In some embodiments, the alkali activator includes sodium hydroxide. In some embodiments, the alkali activator includes sodium hydroxide and sodium sulfate; the mass ratio of sodium hydroxide to sodium sulfate can be 1:(1.5-5), preferably 1:(1.5-3). In some embodiments, the alkaline activator comprises sodium hydroxide and calcium hydroxide; the mass ratio of sodium hydroxide to calcium hydroxide may be 1:(1.5-5), preferably 1:(1.5-3).

[0031] A second aspect of the present invention provides an alkali-activated gelling material, the raw materials for which the preparation includes the above-mentioned alkali-activated gelling composition, or the material is prepared from raw materials including the above-mentioned alkali-activated gelling composition.

[0032] According to some embodiments of the present invention, the preparation method of the alkali-activated gelling material includes the following steps:

[0033] The alkali-activated gelling composition is mixed with water and then cured and maintained.

[0034] In this invention, the alkali activator in the alkali-activated gelling composition can be mixed with water first, and then mixed with the gelling material in the alkali-activated gelling composition; alternatively, the alkali activator in the alkali-activated gelling composition can be mixed with the gelling material in the alkali-activated gelling composition. The method of adding the raw materials is not particularly limited in this invention.

[0035] According to some embodiments of the present invention, the service temperature (operating temperature) of the alkali-activated gelling material is 0 to 50°C, preferably 5 to 40°C, and more preferably 10 to 35°C.

[0036] According to some embodiments of the present invention, the mass ratio (water-to-solid ratio) of water to the cementing material in the alkali-activated cementitious composition is 0.3 to 0.8, for example, 0.3, 0.4, 0.45, 0.5, 0.6, 0.7, 0.8 or any value between them, preferably 0.45-0.6.

[0037] A third aspect of the present invention provides the application of the above-described alkali-activated gelling composition in the preparation of building materials.

[0038] The alkali-activated gelling composition of the present invention is suitable for preparing alkali-activated gelling materials, and the obtained alkali-activated gelling materials have suitable setting time and high long-term compressive strength.

[0039] A fourth aspect of the present invention provides the use of organosilicon compounds in the preparation of alkali-activated gelling materials, wherein the organosilicon compound acts as a retarder for the alkali-activated gelling material, and the organosilicon compound comprises compounds of the general formula R. 2(4-n) Si(OR1) n The organosilicon compound or a combination thereof; wherein n is 1, 2, 3 or 4; R1 is independently selected from C1-C4 alkyl, C1-C4 alkyl substituted with one or more C1-C4 alkoxy groups, R2 is independently selected from substituted or unsubstituted C1-C10 alkyl, substituted or unsubstituted C2-C10 alkenyl, and when R2 contains a substituent, the substituent is one or more, and each is independently selected from C2-C10 alkenyl, C1-C10 alkoxy, C3-C10 cycloalkyl, C2-C10 oxygen-containing heterocyclic group, C6-C15 aryl, -NR a Rb -N + (R c (R) d (R) e )X - , hydroxyl, mercapto, ether bond, thiocyanate, -NCO, C2-C10 ester group, carboxyl group, acid anhydride, and combinations thereof, R a and R b Each is independently selected from hydrogen, C1-C10 straight-chain or branched alkyl groups; R c R d and R e Each is independently selected from C1-C10 straight-chain or branched alkyl groups, X - It represents anion.

[0040] This invention discovers that, when the above general formula is R 2(4-n) Si(OR1) n When organosilicon compounds or their combinations are used as retarder in the preparation of alkali-activated gelling materials, they can not only effectively extend the setting time of the alkali-activated gelling materials and their products, but also do not significantly affect the compressive strength of the alkali-activated materials and their products.

[0041] According to some embodiments of the present invention, the organosilicon compound is selected from one or more structures shown in formulas I-1 to I-4:

[0042]

[0043] Among them, R 1a R 1b R 1c and R 1d The definition is the same as the definition of R1 mentioned above in this invention; R 2a R 2b and R 2c The definition is the same as the definition of R2 mentioned above in this invention.

[0044] In some implementations, R 1a R 1b R 1c and R 1d Independently selected from methyl, ethyl, propyl, isopropyl, and methoxyethyl. In some embodiments, R 1a R 1b R 1c and R 1d It is independently selected from methyl, ethyl, propyl, and isopropyl.

[0045] In some implementations, R 2a R 2b and R 2cIndependently selected from substituted or unsubstituted C1-C10 alkyl groups and substituted or unsubstituted C2-C10 alkenyl groups; and when R 2a R 2b and R 2c When substituents are present, the substituents are one or more, and each is independently selected from C2-C10 alkenyl, C1-C10 alkoxy, C3-C10 cycloalkyl, C2-C10 oxygen-containing heterocyclic, C6-C10 aryl, -NR a R b -N + (R c (R) d (R) e )X - , hydroxyl, mercapto, ether bond, thiocyanate, -NCO, C2-C10 ester group, carboxyl group, acid anhydride, and combinations thereof, R a and R b Each is independently selected from hydrogen, C1-C6 straight-chain or branched alkyl groups; R c R d and R e Independently selected from C1-C6 straight-chain or branched alkyl groups, X - The anions are selected from the following acid radicals produced when the acids ionize: hydrochloric acid, hydrobromic acid, hydroiodic acid, sulfuric acid, maleic acid, succinic acid, citric acid, fumaric acid, salicylic acid, L-tartaric acid, fumaric acid, acetic acid, nitric acid, phosphoric acid, oxalic acid, lactic acid, lysine, and aspartic acid.

[0046] In some implementations, R c R d and R e Alkyl groups independently selected from C1-C4 straight-chain or branched alkyl groups, such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, etc. As a non-limiting example, -N + (R c (R) d (R) e )X - It can represent trimethylammonium chloride group, trimethylammonium bromide group, triethylammonium chloride group, triethylammonium bromide group, etc.

[0047] According to some embodiments of the present invention, in formulas I-1 to I-4, R 2a R 2b and R 2c Independently selected from substituted or unsubstituted C1-C6 alkyl, substituted or unsubstituted C2-C6 alkenyl, and when R 2a R 2b and R 2cWhen substituents are present, the substituents are one or more, and each is independently selected from C2-C6 alkenyl, C1-C6 alkoxy, C3-C6 cycloalkyl, C2-C6 oxygen-containing heterocyclic, -NR a R b , mercapto, ether bond, phenyl, thiocyanate, -NCO, C2-C6 ester group, carboxyl group, acid anhydride, and combinations thereof, R a and R b Each is independently selected from hydrogen, C1-C4 straight-chain or branched alkyl groups.

[0048] According to some embodiments of the present invention, in formulas I-1 to I-4, R 2a R 2b and R 2c Independently selected from substituted or unsubstituted C1-C4 alkyl, substituted or unsubstituted C2-C4 alkenyl, and when R 2a R 2b and R 2c When substituents are present, the substituents are one or more, and each is independently selected from C2-C4 alkenyl, C1-C4 alkoxy, C3-C6 cycloalkyl, C2-C4 oxygen-containing heterocyclic, -NR a R b , mercapto, ether bond, phenyl, thiocyanate, -NCO, C2-C6 ester group, carboxyl group, acid anhydride, and combinations thereof, R a and R b Each is independently selected from hydrogen, C1-C4 straight-chain or branched alkyl groups.

[0049] According to some embodiments of the present invention, in formulas I-1 to I-4, R 2a R 2b and R 2c Independently selected from the following groups, whether substituted or unsubstituted: methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, vinyl, propenyl, isopropenyl; and when R 2a R 2b and R 2c When substituents are present, the substituents are one or more, and each is independently selected from vinyl, propenyl, methoxy, ethoxy, propoxy, isopropoxy, butoxy, etc. Amino, mercapto, phenyl, thiocyanate, -NCO, CH2=C(CH3)COO-, and combinations thereof.

[0050] According to some embodiments of the present invention, in formulas I-1 to I-4, R1 is methyl or ethyl.

[0051] According to some embodiments of the present invention, in formulas I-1 to I-4, R2 is methyl or ethyl.

[0052] According to some embodiments of the present invention, in formulas I-1 to I-4, R1 and R2 are both methyl groups.

[0053] According to some embodiments of the present invention, in formulas I-1 to I-4, R 2a R 2b and R 2c Independently selected from substituted or unsubstituted methyl, substituted or unsubstituted ethyl, substituted or unsubstituted propyl, substituted or unsubstituted vinyl, when R 2a R 2b and R 2c When substituents are present, the substituents are one or more, and each is independently selected from vinyl, propenyl, and other groups. According to some embodiments of the present invention, the retarder package is selected from organosilicon compounds represented by formulas I-1 to I-3 above, including amino, mercapto, phenyl, thiocyanate, -NCO, CH2=C(CH3)COO-, and combinations thereof.

[0054] According to some embodiments of the present invention, the retarder is selected from organosilicon compounds or combinations thereof represented by formulas I-1 to I-3 above.

[0055] According to some embodiments of the present invention, the retarder includes methoxytrimethylsilane, dimethoxydimethylsilane, trimethoxymethylsilane, tetramethoxysilane, ethoxytrimethylsilane, diethoxydimethylsilane, triethoxymethylsilane, tetraethoxysilane, propyltrimethoxysilane, propyltriethoxysilane, isobutyltrimethoxysilane, isobutyltriethoxysilane, 3-aminopropyltriethoxysilane, 3-aminopropyltrimethoxysilane, 3-aminopropylmethyldiethoxysilane, 3-aminopropylmethyldimethoxysilane, aminoethylaminopropyltrimethoxysilane, aminoethylaminopropyltriethoxysilane, aminoethylaminopropylmethyldimethoxysilane, aminoethylaminopropylmethyldimethoxysilane, aminoethylaminopropylmethyldiethoxysilane, and diethylaminomethyltriethoxysilane. One or more of the following: diethylaminopropyltrimethoxysilane, 3-glycidyl etheroxypropyltrimethoxysilane, 3-glycidyl etheroxypropyltriethoxysilane, 3-glycidyl etheroxypropylmethyldiethoxysilane, 3-glycidyl etheroxypropylmethyldiethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, vinyltri(2-methoxyethoxy)silane, vinyltriisopropoxysilane, vinyldimethylethoxysilane, vinylmethyldiethoxysilane, vinylmethyldimethoxysilane, mercaptopropyltrimethoxysilane, mercaptopropyltriethoxysilane, mercaptopropylmethyldimethoxysilane, phenyltriethoxysilane, 3-thiocyanopropyltriethoxysilane, isocyanatepropyltriethoxysilane, and methacryloxypropyltriethoxysilane.

[0056] According to some embodiments of the present invention, the retarder includes one or more of the following: methoxytrimethylsilane, dimethoxydimethylsilane, trimethoxymethylsilane, tetramethoxysilane, 3-glycidyl etheroxypropyltriethoxysilane, methyl vinyldiethoxysilane, mercaptopropyltriethoxysilane, triethoxyaminopropylsilane, phenyltriethoxysilane, 3-thiocyanopropyltriethoxysilane, propyl isocyanatetriethoxysilane, and methacryloxypropyltriethoxysilane.

[0057] According to some embodiments of the present invention, the raw materials for preparing the alkali-activated gelling material include gelling material, alkali activator and retarder, wherein the retarder includes the organosilicon compound.

[0058] According to some embodiments of the present invention, in the raw materials for preparing the alkali-activated gelling material, the organosilicon compound accounts for 1%-10% of the weight of the gelling material, for example 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10% or any value between them, preferably 3%-8%.

[0059] According to some embodiments of the present invention, in the raw materials for preparing the alkali-activated gelling material, the alkali activator accounts for 1%-80% of the weight of the gelling material, for example, 1%, 2%, 4%, 6%, 8%, 10%, 12%, 15%, 20%, 22%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, or any value between therewith. In some embodiments, the alkali activator accounts for 4-50% of the weight of the gelling material. In some embodiments, the alkali activator accounts for 5-25% of the weight of the gelling material. In some embodiments, the alkali activator accounts for 5%-12% of the weight of the gelling material.

[0060] According to some embodiments of the present invention, the alkali activator contains alkali metals in the form of M... Ⅰ Based on 2O (M = Na, K), the content is between 10-90% (mass ratio); the alkaline earth metal content is expressed as M. Ⅱ Based on O (M = Ca, Mg), the content is between 10-90% (mass ratio).

[0061] In this invention, the raw materials for preparing the alkali-activated cementitious material include, but are not limited to, one or more of the following: metallurgical slag, mineral powder, fly ash, steel slag, volcanic ash, metakaolin, and cement. In some embodiments, the cementitious material includes mineral powder. In some embodiments, the cementitious material includes mineral powder and a combination of one or more selected from metakaolin, fly ash, steel slag, and silicate cement.

[0062] In this invention, the alkali activator in the raw materials for preparing the alkali-activated gelling material includes, but is not limited to, one or more of the following: alkali metal oxides, alkaline earth metal oxides, alkali metal hydroxides, alkaline earth metal hydroxides, alkali metal salts, and alkaline earth metal salts. In some embodiments, the alkali activator includes one or more of the following: alkali metal carbonates, alkali metal sulfates, alkali metal silicates, alkali metal aluminates, alkali metal formates, alkali metal acetates, alkali metal hydroxides, alkaline earth metal carbonates, alkaline earth metal sulfates, alkaline earth metal silicates, alkaline earth metal aluminates, alkaline earth metal formates, alkaline earth metal acetates, and alkaline earth metal hydroxides. In some embodiments, the alkali activator includes one or more of the following: sodium hydroxide, sodium silicate, sodium carbonate, sodium sulfate, and calcium hydroxide.

[0063] Compared with the prior art, the present invention has the following beneficial effects:

[0064] In existing technologies, silane molecules are typically used as efflorescence inhibitors and waterproofing agents, with few reports of their use as retarders. This invention creatively discovers organosilicon compounds with specific structures that, when used as retarders for alkali-activated cementitious materials, effectively extend the initial and final setting times of these materials and their products without significantly affecting their compressive strength. Detailed Implementation

[0065] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. The specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention in any way. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concepts of this disclosure. Such structures and techniques have also been described in many publications.

[0066] definition

[0067] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly used in the field to which this invention pertains. For the purposes of interpreting this specification, the following definitions will apply, and where appropriate, terms used in the singular will also include the plural forms, and vice versa.

[0068] In this invention, "cementing material," also known as binder, refers to a substance that, under physical and chemical action, can transform from a slurry into a solid, stone-like substance and can bind other materials to form a composite solid with a certain mechanical strength. In this paper, aluminosilicates (such as cement, metakaolin, and volcanic ash) and industrial waste (such as slag, fly ash, silica fume, and steel slag) both fall under the category of cementing materials.

[0069] In this invention, "alkali-activated cementitious material," also known as "chemically activated cementitious material," refers to a hydraulic cementitious material prepared using the catalytic principle of alkali activators (such as caustic alkalis, alkali-containing silicates, aluminates, etc.). It is mainly composed of calcined natural minerals or industrial waste residues (such as slag, fly ash, silica fume, steel slag, etc.) containing aluminosilicates with a certain rapid cooling and heating history, and alkali activators. It has the characteristics of rapid setting and hardening, high strength, and high temperature resistance, and is used in civil engineering, solid waste, high-strength, sealing, and high-temperature environment projects.

[0070] In this invention, "alkyl" refers to a monovalent hydrocarbon group comprising a saturated straight chain or a branched chain, wherein the alkyl group may be independently and optionally substituted by one or more substituents described in this invention. Examples of alkyl groups include, but are not limited to, methyl (Me,-CH3), ethyl (Et,-CH2CH3), n-propyl (n-Pr,-CH2CH2CH3), isopropyl (i-Pr,-CH(CH3)2), n-butyl (n-Bu,-CH2CH2CH2CH3), isobutyl (i-Bu,-CH2CH(CH3)2), sec-butyl (s-Bu,-CH(CH3)CH2CH3), tert-butyl (t-Bu, -C(CH3)3), n-pentyl (-CH2CH2CH2CH2CH3), 2-pentyl (-CH(CH3)CH2CH2CH3), 3-pentyl (-CH(CH2CH3)2), 2-methyl-2-butyl (-C(CH3)2CH2CH3), 3-methyl-2-butyl (-CH(CH3)CH(CH3)2), 3-methyl-1-butyl (-CH2CH2CH(CH3)2), 2-methyl-1- Butyl (-CH2CH(CH3)CH2CH3), n-hexyl (-CH2CH2CH2CH2CH2CH3), 2-hexyl (-CH(CH3)CH2CH2CH2CH3), 3-hexyl (-CH(CH2CH3)(CH2CH2CH3)), 2-methyl-2-pentyl (-C(CH3)2CH2CH2CH3), 3-methyl-2-pentyl (-CH(CH3)CH(CH3)CH2CH3) ), 4-methyl-2-pentyl (-CH(CH3)CH2CH(CH3)2), 3-methyl-3-pentyl (-C(CH3)(CH2CH3)2), 2-methyl-3-pentyl (-CH(CH2CH3)CH(CH3)2), 2,3-dimethyl-2-butyl (-C(CH3)2CH(CH3)2), 3,3-dimethyl-2-butyl (-CH(CH3)C(CH3)3), n-heptyl, n-octyl, etc.

[0071] In this invention, "alkoxy" refers to an alkyl group, as defined herein, which is attached to the main carbon chain by an oxygen atom. Examples of such alkyl groups include, but are not limited to, methoxy, ethoxy, propoxy, butoxy, etc.

[0072] In this invention, "alkenyl" includes a straight-chain or branched monovalent hydrocarbon group, wherein at least one position is unsaturated, i.e., one C-C is an sp2 double bond. Alkenyl groups can have 2-10 carbon atoms, or 2-8 carbon atoms, or 2-6 carbon atoms, or 2-4 carbon atoms. Specific examples of alkenyl groups include, but are not limited to, vinyl (-CH=CH2), allyl (-CH2CH=CH2), etc.

[0073] In this invention, "cycloalkyl" refers to a monovalent or polyvalent, non-aromatic, saturated or partially unsaturated ring that does not contain heteroatoms, including monocyclic or bicyclic rings. The bicyclic carbocyclic ring can be a bicyclic [4,5], [5,5], [5,6], or [6,6] system, and the bicyclic carbocyclic ring can also be a bicyclic [5,6] or [6,6] system. Includes, but is not limited to, cycloalkyl, cycloalkenyl, and cycloynyl groups. Examples of cyclic aliphatic groups include, but are not limited to, cyclopropyl, cyclobutyl, cyclopentyl, 1-cyclopentyl-1-enyl, 1-cyclopentyl-2-enyl, 1-cyclopentyl-3-enyl, cyclohexyl, 1-cyclohexyl-1-enyl, 1-cyclohexyl-2-enyl, 1-cyclohexyl-3-enyl, cyclohexadienyl, cycloheptyl, cyclooctyl, cyclononyl, cyclodecyl, etc.

[0074] In this invention, "oxygen-containing heterocyclic group" refers to a monocyclic, bicyclic, or tricyclic system in which one or more carbon atoms on the ring are independently and optionally replaced by oxygen atoms. The ring can be fully saturated or contain one or more degrees of unsaturation, but is by no means aromatic. It has only one connection point to other molecules, including but not limited to...

[0075] In this invention, "aryl" refers to a carbocyclic system containing 6-15 membered rings, including monocyclic, bicyclic, and tricyclic systems, wherein at least one ring system is aromatic, and each ring system contains 3-7 membered rings with only one attachment point connected to the rest of the molecule. Examples include phenyl, naphthyl, and anthracene, etc.

[0076] In this invention, "ester group" refers to -COOR, and R represents alkyl. The definition of alkyl is as described above, and R is preferably a C2-C6 alkyl group.

[0077] The following embodiments are provided to aid in understanding the present invention. However, it should be understood that these embodiments are for illustrative purposes only and do not constitute any limitation. The actual scope of protection of the present invention is set forth in the claims. It should be understood that any modifications and changes can be made without departing from the spirit of the present invention.

[0078] Unless otherwise specified, all reagents used in the following experiments of this invention are commercially available products or reagents prepared according to conventional methods. Unless otherwise specified, all methods used in the experiments are conventional experimental methods. Unless otherwise specified, all instruments used in the experiments are commercially available.

[0079] Example

[0080] Preparation of alkali-activated cementitious materials:

[0081] Weigh the samples according to the composition (precursor, activator, retarder) of each embodiment in Table 1. Mix the activator and water to obtain the activator solution. Directly mix the precursor, activator solution and retarder and stir thoroughly to obtain the sample to be tested.

[0082] The preparation of the alkali-activated gelling materials in each comparative example was carried out in accordance with the method described in the above examples.

[0083] Table 1

[0084]

[0085]

[0086]

[0087] Note: The dosage of alkali activator and retarder in Table 1 refers to the dosage in the precursor.

[0088] According to the test methods specified in GB / T 19139-2012 "Test Methods for Cement in Oil Wells", the thickening time and compressive strength of the samples obtained in the above embodiments and comparative examples were tested, and the results are shown in Table 2.

[0089] Table 2

[0090]

[0091]

[0092] Table 3

[0093] 1-day compressive strength (MPa) 3D compressive strength (MPa) Compare with Example 1 21.67 22.98 Compare with Example 7 30.02 44.62 Compare with Example 12 21.40 22.54 Compare with Example 13 15.12 16.44 Example 1 18.83 19.37 Example 2 15.72 18.30 Example 3 18.08 26.88 Example 18 27.40 34.22 Example 23 20.60 27.45 Example 26 17.50 24.28

[0094] Experimental conclusion:

[0095] As can be seen from Tables 1, 2 and 3 above, compared with Control Example 1, Examples 1, 2, 3 and 4, in the low-dosage (8%) sodium hydroxide activator system, using different silanes (different siloxy groups) as retarder, can effectively prolong the initial and final setting times of alkali-activated cementitious materials, and have no significant effect on the 3-day compressive strength of the materials.

[0096] Compared with Control Example 2, Examples 5, 6, and 7, in the high-dosage (12%) sodium hydroxide activator system, all effectively extended the initial and final setting times of alkali-activated cementitious materials by using different silanes (different siloxy groups).

[0097] Compared with Control Example 3, Examples 8, 9, and 10, in the water glass activator system, all showed that the use of different silanes (different siloxy groups) could effectively prolong the initial and final setting times of alkali-activated cementitious materials.

[0098] Compared with Control Example 4, Examples 11, 12, and 13, using water glass as an activator and metakaolin-mineral powder composite precursor, all effectively extended the initial and final setting times of alkali-activated cementitious materials by using different silanes (different siloxy groups).

[0099] Compared with Comparative Examples 1, 5, and 6, the results of Examples 1, 14, and 15 show that using methoxytrimethylsilane as a retarder can effectively prolong the initial and final setting times of alkali-activated cementitious materials at different temperatures (10°C, 25°C, and 35°C).

[0100] Compared with Control Example 1, the results of Examples 1, 16, and 17 show that trimethoxymethylsilane, as a retarder, can effectively prolong the initial and final setting times of alkali-activated cementitious materials at different dosages (3%, 5%, and 8%).

[0101] Compared with Control Examples 1, 7, 8, and 9, the results of Examples 1, 18, 19, and 20 show that using methoxytrimethylsilane or dimethoxydimethylsilane as a retarder can effectively prolong the initial and final setting times of alkali-activated cementitious materials in different precursor systems (mineral powder, mineral powder + fly ash, mineral powder + steel slag + fly ash, mineral powder + silicate cement + fly ash, etc.). Compared with Control Examples 1 and 7 and Examples 1 and 18, using methoxytrimethylsilane as a retarder has no significant effect on the 3-day compressive strength of the material in different precursor systems (mineral powder, mineral powder + fly ash).

[0102] Compared with Comparative Examples 1, 10, and 11, the results of Examples 1, 21, and 22 show that using methoxytrimethylsilane as a retarder can effectively prolong the initial and final setting times of alkali-activated cementitious materials in different activator systems (sodium hydroxide, sodium carbonate, sodium sulfate, calcium hydroxide, etc.).

[0103] Compared with Control Example 1, the results of Examples 1, 23, 24, 25, 26, 27, 28, 29, and 30 demonstrate that silanes containing ether groups, carbon-carbon double bonds, mercapto groups, amino groups, phenyl groups, thiocyanate groups, ester groups, and -NC=O groups can also effectively prolong the initial and final setting times of alkali-activated cementitious materials. Compared with Control Example 1 and Examples 23 and 26, silanes containing ether groups and amino groups have no significant effect on the 3-day compressive strength of the material.

[0104] Compared with the tetramethylsilane retarder used in Comparative Example 12, the silane retarder used in this invention has a better retarding effect, for example in Examples 1, 2, 3, and 4.

[0105] Compared with the use of borax as a retarder in Comparative Example 13, the silane retarder used in this invention has the same retarding effect and has no significant effect on the 3-day compressive strength of the material, which is superior to the compressive strength of borax as a retarder.

[0106] Compared with Comparative Example 1 and Examples 1, 2 and 3, in the low-dosage (4%) sodium hydroxide activator system, the use of different silanes (different siloxy groups) had no significant effect on the 3-day compressive strength of the material.

[0107] The technical solutions of the present invention are not limited to the specific embodiments described above. Any technical modifications made in accordance with the technical solutions of the present invention fall within the protection scope of the present invention.

Claims

1. An alkali-activated gelling composition comprising a gelling material, an alkali activator, and a retarder, wherein, The retarder comprises one or more organosilicon compounds shown in formulas I-1 to I-4 below; Among them, R 1a R 1b R 1c and R 1d Independently selected from C1-C4 alkyl groups, or C1-C4 alkyl groups substituted with one or more C1-C4 alkoxy groups. R 2a R 2b and R 2c Independently selected from substituted or unsubstituted C1-C10 alkyl groups, substituted or unsubstituted C2-C10 alkenyl groups, and when R 2a R 2b and R 2c When substituents are present, the substituents are one or more, and each is independently selected from C2-C10 alkenyl, C1-C10 alkoxy, C3-C10 cycloalkyl, C2-C10 oxygen-containing heterocyclic, C6-C15 aryl, -NR a R b -N + (R c (R) d (R) e )X - , hydroxyl, mercapto, ether bond, thiocyanate, -NCO, C2-C10 ester group, carboxyl group, acid anhydride, and combinations thereof, R a and R b Each is independently selected from hydrogen, C1-C10 straight-chain or branched alkyl groups; R c R d and R e Each is independently selected from C1-C10 straight-chain or branched alkyl groups, X - It represents anion.

2. The alkali-activated gelling composition according to claim 1, characterized in that, R 1a R 1b R 1c and R 1d Independently selected from methyl, ethyl, propyl, and isopropyl; R 2a R 2b and R 2c Independently selected from substituted or unsubstituted C1-C10 alkyl groups and substituted or unsubstituted C2-C10 alkenyl groups; and when R 2a R 2b and R 2c When substituents are present, the substituents are one or more, and each is independently selected from C2-C10 alkenyl, C1-C10 alkoxy, C3-C10 cycloalkyl, C2-C10 oxygen-containing heterocyclic, C6-C10 aryl, -NR a R b -N + (R c (R) d (R) e )X - , hydroxyl, mercapto, ether bond, thiocyanate, -NCO, C2-C10 ester group, carboxyl group, acid anhydride, and combinations thereof, R a and R b Each is independently selected from hydrogen, C1-C6 straight-chain or branched alkyl groups, R c R d and R e Independently selected from C1-C6 straight-chain or branched alkyl groups, X - The following acid radicals are selected from the anions produced when the following acids ionize: hydrochloric acid, hydrobromic acid, hydroiodic acid, sulfuric acid, maleic acid, succinic acid, citric acid, fumaric acid, salicylic acid, L-tartaric acid, fumaric acid, acetic acid, nitric acid, phosphoric acid, oxalic acid, lactic acid, lysine, and aspartic acid. Preferably, R 2a R 2b and R 2c Independently selected from substituted or unsubstituted C1-C6 alkyl, substituted or unsubstituted C2-C6 alkenyl, and when R 2a R 2b and R 2c When substituents are present, the substituents are one or more, and each is independently selected from C2-C6 alkenyl, C1-C6 alkoxy, C3-C6 cycloalkyl, C2-C6 oxygen-containing heterocyclic, -NR a R b , mercapto, ether bond, phenyl, thiocyanate, -NCO, C2-C6 ester group, carboxyl group, acid anhydride, and combinations thereof, R a and R b Each is independently selected from hydrogen, C1-C4 straight-chain or branched alkyl groups; Preferably, R 2a R 2b and R 2c Independently selected from the following groups, whether substituted or unsubstituted: methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, vinyl, propenyl, isopropenyl; and when R 2a R 2b and R 2c When substituents are present, the substituents are one or more, and each is independently selected from vinyl, propenyl, methoxy, ethoxy, propoxy, isopropoxy, butoxy, etc. Amino, mercapto, phenyl, thiocyanate, -NCO, CH2=C(CH3)COO-, and combinations thereof; Preferably, R 1a R 1b R 1c and R 1d Independently selected from methyl and ethyl; Preferably, R 2a R 2b and R 2c Independently selected from substituted or unsubstituted methyl, substituted or unsubstituted ethyl, substituted or unsubstituted propyl, substituted or unsubstituted vinyl, when R 2a R 2b and R 2c When substituents are present, the substituents are one or more, and each is independently selected from vinyl, propenyl, and other groups. Amino, mercapto, phenyl, thiocyanate, -NCO, CH2=C(CH3)COO-, and combinations thereof.

3. The alkali-activated gelling composition according to claim 1 or 2, characterized in that, The retarder includes methoxytrimethylsilane, dimethoxydimethylsilane, trimethoxymethylsilane, tetramethoxysilane, ethoxytrimethylsilane, diethoxydimethylsilane, triethoxymethylsilane, tetraethoxysilane, propyltrimethoxysilane, propyltriethoxysilane, isobutyltrimethoxysilane, isobutyltriethoxysilane, 3-aminopropyltriethoxysilane, 3-aminopropyltrimethoxysilane, 3-aminopropylmethyldiethoxysilane, 3-aminopropylmethyldimethoxysilane, aminoethylaminopropyltrimethoxysilane, aminoethylaminopropyltriethoxysilane, aminoethylaminopropylmethyldimethoxysilane, aminoethylaminopropylmethyldimethoxysilane, aminoethylaminopropylmethyldiethoxysilane, diethylaminomethyltriethoxysilane, diethylaminopropyl... Trimethoxysilane, 3-glycidyl etheroxypropyltrimethoxysilane, 3-glycidyl etheroxypropyltriethoxysilane, 3-glycidyl etheroxypropylmethyldiethoxysilane, 3-glycidyl etheroxypropylmethyldimethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, vinyltri(2-methoxyethoxy)silane, vinyltriisopropoxysilane, vinyldimethylethoxysilane, vinylmethyldiethoxysilane, vinylmethyldimethoxysilane, mercaptopropyltrimethoxysilane, mercaptopropyltriethoxysilane, mercaptopropylmethyldimethoxysilane, phenyltriethoxysilane, 3-thiocyanopropyltriethoxysilane, isocyanatepropyltriethoxysilane, methacryloxypropyltriethoxysilane; Preferably, the retarder comprises one or more of the following: methoxytrimethylsilane, dimethoxydimethylsilane, trimethoxymethylsilane, tetramethoxysilane, 3-glycidyl etheroxypropyltriethoxysilane, methyl vinyldiethoxysilane, mercaptopropyltriethoxysilane, triethoxyaminopropylsilane, phenyltriethoxysilane, 3-thiocyanopropyltriethoxysilane, isocyanate propyltriethoxysilane, and methacryloxypropyltriethoxysilane.

4. The alkali-activated gelling composition according to any one of claims 1-3, characterized in that, The retarder accounts for 1%-10% of the weight of the cementitious material, preferably 3%-8%; and / or, The organosilicon compound constitutes 1%-10% of the weight of the cementitious material, preferably 3%-8%, more preferably 4-6%; and / or, The alkali activator accounts for 1%-80% of the weight of the cementitious material, preferably 4%-50%, and more preferably 5%-25%.

5. The alkali-activated gelling composition according to any one of claims 1-4, characterized in that, The cementing material includes one or more of metallurgical slag, mineral powder, fly ash, steel slag, volcanic ash, metakaolin, and cement, preferably mineral powder or a combination of mineral powder and one or more selected from metakaolin, fly ash, steel slag, and silicate cement; and / or, The alkaline activator includes one or more of oxides, hydroxides and salts of alkali metals or alkaline earth metals, preferably one or more of carbonates, sulfates, silicates, aluminates, formates, acetates and hydroxides of alkali metals or alkaline earth metals, and more preferably one or more of sodium hydroxide, sodium silicate, sodium carbonate, sodium sulfate and calcium hydroxide.

6. An alkali-activated gelling material, wherein the raw materials for its preparation include the alkali-activated gelling composition according to any one of claims 1-5, or it is prepared from raw materials including the alkali-activated gelling composition according to any one of claims 1-5; Preferably, the alkali-activated gelling material is used at a temperature of 0–50°C, more preferably 5–40°C, and even more preferably 10–35°C; Preferably, the preparation method of the alkali-activated gelling material includes the following steps: The alkali-activated gelling composition is mixed with water and then cured and maintained. Preferably, the mass ratio of water to the gelling material in the alkali-activated gelling composition is 0.3 to 0.8, more preferably 0.45 to 0.

6.

7. The application of the alkali-activated gelling composition according to any one of claims 1-5 in the preparation of building materials, preferably in the preparation of alkali-activated gelling materials.

8. Application of organosilicon compounds in the preparation of alkali-activated cementitious materials, among which, The organosilicon compound serves as a retarder for the alkali-activated gelling material, and the organosilicon compound is selected from one or more structures shown in formulas I-1 to I-4 below: Among them, R 1a R 1b R 1c and R 1d Independently selected from C1-C4 alkyl groups, or C1-C4 alkyl groups substituted with one or more C1-C4 alkoxy groups. R 2a R 2b and R 2c Independently selected from substituted or unsubstituted C1-C10 alkyl groups, substituted or unsubstituted C2-C10 alkenyl groups, and when R 2a R 2b and R 2c When substituents are present, the substituents are one or more, and each is independently selected from C2-C10 alkenyl, C1-C10 alkoxy, C3-C10 cycloalkyl, C2-C10 oxygen-containing heterocyclic, C6-C15 aryl, -NR a R b -N + (R c (R) d (R) e )X - , hydroxyl, mercapto, ether bond, thiocyanate, -NCO, C2-C10 ester group, carboxyl group, acid anhydride, and combinations thereof, R a and R b Each is independently selected from hydrogen, C1-C10 straight-chain or branched alkyl groups; R c R d and R e Each is independently selected from C1-C10 straight-chain or branched alkyl groups, X - Indicates anion; Preferably, R 1a R 1b R 1c and R 1d Independently selected from methyl, ethyl, propyl, and isopropyl; Preferably, R 2a R 2b and R 2c Independently selected from substituted or unsubstituted C1-C10 alkyl groups and substituted or unsubstituted C2-C10 alkenyl groups; and when R 2a R 2b and R 2c When substituents are present, the substituents are one or more, and each is independently selected from C2-C10 alkenyl, C1-C10 alkoxy, C3-C10 cycloalkyl, C2-C10 oxygen-containing heterocyclic, C6-C10 aryl, -NR a R b -N + (R c (R) d (R) e )X - , hydroxyl, mercapto, ether bond, thiocyanate, -NCO, C2-C10 ester group, carboxyl group, acid anhydride, and combinations thereof, R a and R b Each is independently selected from hydrogen, C1-C6 straight-chain or branched alkyl groups; R c R d and R e Independently selected from C1-C6 straight-chain or branched alkyl groups, X - The following acid radicals are selected from the anions produced when the following acids ionize: hydrochloric acid, hydrobromic acid, hydroiodic acid, sulfuric acid, maleic acid, succinic acid, citric acid, fumaric acid, salicylic acid, L-tartaric acid, fumaric acid, acetic acid, nitric acid, phosphoric acid, oxalic acid, lactic acid, lysine, and aspartic acid. Preferably, R 2a R 2b and R 2c Independently selected from substituted or unsubstituted C1-C6 alkyl, substituted or unsubstituted C2-C6 alkenyl, and when R 2a R 2b and R 2c When substituents are present, the substituents are one or more, and each is independently selected from C2-C6 alkenyl, C1-C6 alkoxy, C3-C6 cycloalkyl, C2-C6 oxygen-containing heterocyclic, -NR a R b , mercapto, ether bond, phenyl, thiocyanate, -NCO, C2-C6 ester group, carboxyl group, acid anhydride, and combinations thereof, R a and R b Each is independently selected from hydrogen, C1-C4 straight-chain or branched alkyl groups; Preferably, R 2a R 2b and R 2c Independently selected from the following groups, whether substituted or unsubstituted: methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, vinyl, propenyl, isopropenyl; and when R 2a R 2b and R 2c When substituents are present, the substituents are one or more, and each is independently selected from vinyl, propenyl, methoxy, ethoxy, propoxy, isopropoxy, butoxy, etc. Amino, mercapto, phenyl, thiocyanate, -NCO, CH2=C(CH3)COO-, and combinations thereof; Preferably, R 1a R 1b R 1c and R 1d Independently selected from methyl and ethyl; Preferably, R 2a R 2b and R 2c Independently selected from substituted or unsubstituted methyl, substituted or unsubstituted ethyl, substituted or unsubstituted propyl, substituted or unsubstituted vinyl, when R 2a R 2b and R 2c When substituents are present, the substituents are one or more, and each is independently selected from vinyl, propenyl, and other groups. Amino, mercapto, phenyl, thiocyanate, -NCO, CH2=C(CH3)COO-, and combinations thereof.

9. The application according to claim 8, characterized in that, The organosilicon compounds include methoxytrimethylsilane, dimethoxydimethylsilane, trimethoxymethylsilane, tetramethoxysilane, ethoxytrimethylsilane, diethoxydimethylsilane, triethoxymethylsilane, tetraethoxysilane, propyltrimethoxysilane, propyltriethoxysilane, isobutyltrimethoxysilane, isobutyltriethoxysilane, 3-aminopropyltriethoxysilane, 3-aminopropyltrimethoxysilane, 3-aminopropylmethyldiethoxysilane, 3-aminopropylmethyldimethoxysilane, aminoethylaminopropyltrimethoxysilane, aminoethylaminopropyltriethoxysilane, aminoethylaminopropylmethyldimethoxysilane, aminoethylaminopropylmethyldimethoxysilane, aminoethylaminopropylmethyldiethoxysilane, diethylaminomethyltriethoxysilane, diethylaminopropyltriethoxysilane, diethylaminopropylmethyldi ... Propyltrimethoxysilane, 3-glycidyl etheroxypropyltrimethoxysilane, 3-glycidyl etheroxypropyltriethoxysilane, 3-glycidyl etheroxypropylmethyldiethoxysilane, 3-glycidyl etheroxypropylmethyldimethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, vinyltri(2-methoxyethoxy)silane, vinyltriisopropoxysilane, vinyldimethylethoxysilane, vinylmethyldiethoxysilane, vinylmethyldimethoxysilane, mercaptopropyltrimethoxysilane, mercaptopropyltriethoxysilane, mercaptopropylmethyldimethoxysilane, phenyltriethoxysilane, 3-thiocyanopropyltriethoxysilane, propylisocyanatetriethoxysilane, and methacryloyloxypropyltriethoxysilane are among one or more of these. Preferably, the organosilicon compound comprises one or more of the following: methoxytrimethylsilane, dimethoxysilane, trimethoxymethylsilane, tetramethoxysilane, 3-glycidyl etheroxypropyltriethoxysilane, methyl vinyldiethoxysilane, mercaptopropyltriethoxysilane, triethoxyaminopropylsilane, phenyltriethoxysilane, 3-thiocyanopropyltriethoxysilane, isocyanate propyltriethoxysilane, and methacryloxypropyltriethoxysilane. Preferably, the alkali-activated gelling material is used at a temperature of 0–50°C, more preferably 5–40°C, and even more preferably 10–35°C.

10. The application according to claim 8 or 9, characterized in that, The raw materials for preparing the alkali-activated gelling material include gelling material, alkali activator and retarder, wherein the retarder includes the organosilicon compound; Preferably, the organosilicon compound accounts for 1%-10% of the weight of the cementitious material, more preferably 3%-8%, and even more preferably 4-6%; Preferably, the cementing material includes one or more of metallurgical slag, mineral powder, fly ash, steel slag, volcanic ash, metakaolin, and cement; more preferably, it is mineral powder or a combination of mineral powder and one or more of metakaolin, fly ash, steel slag, and silicate cement. Preferably, the alkaline activator comprises one or more of oxides, hydroxides, and salts of alkali metals or alkaline earth metals; Preferably, the alkaline activator includes one or more of alkali metal or alkaline earth metal carbonates, sulfates, silicates, aluminates, formates, acetates, and hydroxides; more preferably, it includes one or more of sodium hydroxide, sodium silicate, sodium carbonate, sodium sulfate, and calcium hydroxide.

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