CN117776608A - Early-alkali slag composite material suitable for negative temperature environment and preparation method and application thereof - Google Patents
Early-alkali slag composite material suitable for negative temperature environment and preparation method and application thereof Download PDFInfo
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- CN117776608A CN117776608A CN202311809435.6A CN202311809435A CN117776608A CN 117776608 A CN117776608 A CN 117776608A CN 202311809435 A CN202311809435 A CN 202311809435A CN 117776608 A CN117776608 A CN 117776608A
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- 239000003513 alkali Substances 0.000 title claims abstract description 75
- 239000002893 slag Substances 0.000 title claims abstract description 60
- 239000002131 composite material Substances 0.000 title claims abstract description 58
- 238000002360 preparation method Methods 0.000 title abstract description 22
- 239000000843 powder Substances 0.000 claims abstract description 46
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 44
- 239000011707 mineral Substances 0.000 claims abstract description 44
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000006004 Quartz sand Substances 0.000 claims abstract description 34
- 230000005284 excitation Effects 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000002994 raw material Substances 0.000 claims abstract description 20
- 230000001105 regulatory effect Effects 0.000 claims abstract description 18
- 230000015271 coagulation Effects 0.000 claims abstract description 17
- 238000005345 coagulation Methods 0.000 claims abstract description 17
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 49
- 235000010755 mineral Nutrition 0.000 claims description 42
- 239000000243 solution Substances 0.000 claims description 38
- 239000004568 cement Substances 0.000 claims description 37
- 239000000203 mixture Substances 0.000 claims description 35
- 238000003756 stirring Methods 0.000 claims description 31
- 239000003795 chemical substances by application Substances 0.000 claims description 28
- 239000000463 material Substances 0.000 claims description 24
- 239000007788 liquid Substances 0.000 claims description 21
- 238000002156 mixing Methods 0.000 claims description 16
- 239000011734 sodium Substances 0.000 claims description 15
- 239000012266 salt solution Substances 0.000 claims description 13
- 230000002308 calcification Effects 0.000 claims description 11
- 239000000292 calcium oxide Substances 0.000 claims description 11
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 11
- 239000002253 acid Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 9
- 239000002159 nanocrystal Substances 0.000 claims description 8
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 6
- 239000004115 Sodium Silicate Substances 0.000 claims description 5
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 5
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 5
- 239000011398 Portland cement Substances 0.000 claims description 4
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 4
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 4
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 4
- 229910052708 sodium Inorganic materials 0.000 claims description 4
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 3
- 239000004566 building material Substances 0.000 claims description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 2
- 239000004111 Potassium silicate Substances 0.000 claims description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 2
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 claims description 2
- 229910052913 potassium silicate Inorganic materials 0.000 claims description 2
- 235000019353 potassium silicate Nutrition 0.000 claims description 2
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 claims description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 2
- 208000004434 Calcinosis Diseases 0.000 claims 5
- 239000004567 concrete Substances 0.000 abstract description 10
- 238000012360 testing method Methods 0.000 description 14
- 239000012153 distilled water Substances 0.000 description 11
- 239000003469 silicate cement Substances 0.000 description 11
- 238000001723 curing Methods 0.000 description 10
- 238000006703 hydration reaction Methods 0.000 description 10
- 238000010276 construction Methods 0.000 description 9
- 229940095564 anhydrous calcium sulfate Drugs 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 8
- 238000005056 compaction Methods 0.000 description 7
- 239000003755 preservative agent Substances 0.000 description 7
- 230000002335 preservative effect Effects 0.000 description 7
- 239000007787 solid Substances 0.000 description 7
- 239000002245 particle Substances 0.000 description 6
- 239000008399 tap water Substances 0.000 description 6
- 235000020679 tap water Nutrition 0.000 description 6
- 238000005303 weighing Methods 0.000 description 6
- 150000001412 amines Chemical class 0.000 description 5
- 230000036571 hydration Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000000053 physical method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical group [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 229910001424 calcium ion Inorganic materials 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000005543 nano-size silicon particle Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- -1 salt ions Chemical class 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229940043430 calcium compound Drugs 0.000 description 1
- 150000001674 calcium compounds Chemical class 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- 229940095672 calcium sulfate Drugs 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000011738 major mineral Substances 0.000 description 1
- 235000011963 major mineral Nutrition 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Abstract
The invention relates to an early-alkali slag composite material suitable for a negative temperature environment, and a preparation method and application thereof, wherein the early-alkali slag composite material comprises the following raw material components: mineral powder, quartz sand, early strength components, excitation components, coagulation regulating components and water; the mineral powder is 349-551 parts by weight, the quartz sand is 680-800 parts by weight, the early strength component is 0-15 parts by weight, the excitation component is 180-330 parts by weight, the coagulation regulating component is 0-72 parts by weight, and the water is 0-30 parts by weight. The invention realizes the efficient regulation and control of the setting time, the working performance and the strength of the alkali slag composite material at the negative temperature by designing the types, the dosage and the proportion of the early strength component, the excitation component and the setting component by means of the early strength promotion characteristic of the early strength component, the high excitation characteristic of the excitation component and the setting regulation characteristic of the setting regulation component. Compared with the prior art, the invention can obtain ideal strength at-10 ℃ to meet the application of concrete engineering at least-10 ℃, and breaks through the technical bottleneck that common concrete cannot be normally coagulated and hardened and engineering application when the temperature is lower than 5 ℃.
Description
Technical Field
The invention relates to the technical field of novel energy-saving building materials, in particular to an early-alkali slag composite material suitable for a negative temperature environment, and a preparation method and application thereof.
Background
Concrete materials play an irreplaceable role in the infrastructure. With the rapid development of the economy in China, the urban construction scale is increasingly enlarged, and the construction industry becomes an important industry for influencing and promoting the development of the national economy. However, in an environment where the construction scale is continuously increased throughout the country, particularly in a northern region of China where the construction scale is in a negative temperature environment, in order to meet the requirement of the engineering progress, the construction of the concrete engineering must be performed in the negative temperature environment. However, the most suitable temperature for silicate cement hydration is between 10 ℃ and 20 ℃, so that a novel cementing material suitable for the negative temperature environment needs to be developed.
The existing construction method under the negative temperature environment mainly comprises a physical method and a chemical method. The physical method mainly comprises the steps of using a heat preservation and insulation coating layer, heating aggregate and concrete mixing water in advance, constructing a greenhouse, paving an electric blanket and the like, and effectively resisting the negative influence of a negative temperature environment on the hydration process of Portland cement by delaying the dissipation of hydration heat or providing an external heat source, but has the defects of high energy consumption and capability of discharging a large amount of CO 2 And (3) gas. The chemical method generally comprises the steps of changing the types of the cementing materials, increasing the dosage of the cementing materials or adding chemical additives such as a high-efficiency water reducing agent, an early strength agent, an antifreezing agent and the like, but when the dosage of inorganic salt is too large, water molecules are combined into clusters due to hydration of salt ions, so that the activity of the water molecules is reduced in a negative temperature environment, cement particles cannot be fully hydrated in the negative temperature environment, and the strength is reduced in the negative temperature environment.
Patent publication No. CN114920494A discloses an internal heat-insulating additive for negative-temperature concrete with a secondary heat release function, and the method is to mix the internal heat-insulating additive with the secondary heat release function into the concrete to realize the purpose of preparing cement concrete at negative temperature. The method requires the treatment of an external agent by using absolute ethyl alcohol and an inorganic-organic silane coupling agent, and is relatively complicated. Meanwhile, the method is that stirring is carried out at normal temperature and then curing is carried out at negative temperature, and the time from normal temperature stirring to negative temperature curing can influence the performance of the formed cement concrete. Patent publication number CN115582905a discloses a low-temperature concrete curing apparatus and curing method, which essentially belongs to the apparatus invention patent, and secondly,it is a physical method for providing external heat source, and has the advantages of high energy consumption and large CO emission 2 The disadvantage of gas.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the early-alkali slag composite material suitable for the negative temperature environment, and the preparation method and the application thereof.
The aim of the invention can be achieved by the following technical scheme:
one of the technical schemes of the invention is to provide an early-alkali slag composite material suitable for a negative temperature environment, which comprises the following raw material components: mineral powder, quartz sand, early strength components, excitation components, coagulation regulating components and water; the mineral powder is 349-551 parts by weight, the quartz sand is 680-800 parts by weight, the early strength component is 0-15 parts by weight, the excitation component is 180-330 parts by weight, the coagulation regulating component is 0-72 parts by weight, and the water is 0-30 parts by weight.
Further, the water includes distilled water, deionized water, tap water, preferably distilled water.
Further, the mineral powder is blast furnace fine slag, the grain diameter is 0.04-133.74 mu m, and the specific area is not less than 428m 2 /kg。
Further, the chemical composition of the mineral powder comprises the following components: 45.5 to 51.3wt.% CaO,21.4 to 30.0wt.% SiO 2 12.3wt.% to 14.1wt.% Al 2 O 3 2.8 to 6.3wt.% MgO,0.29 to 0.36wt.% Na 2 O。
Further, the early strength component comprises one or more of a tri-hydroxyethyl amine type early strength agent, a polycarboxylic acid type early strength agent or a nanocrystal core type early strength agent.
Further, the polycarboxylic acid type early strength agent comprises one or more of 540P type, 530P type or 325C type, and the nanocrystal core type early strength agent comprises one or more of nano calcium silicate hydrate, nano silicon dioxide, nano aluminum oxide or nano titanium dioxide. Further, the excitation component includes an alkaline solution and a salt solution; the alkali solution comprises one or more of sodium hydroxide solution, calcium hydroxide solution and potassium hydroxide solution; the salt solution comprises one or more of potassium silicate solution, sodium silicate solution, potassium carbonate solution or sodium carbonate solution. The alkali solution is prepared by dissolving solid alkali in distilled water, the appearance of the alkali solid required by preparing the alkali solution is flaky or granular, and the purity of the alkali solid is more than or equal to 96%.
Further, the concentration of the alkali solution is 8-16 mol/L, the modulus of the salt solution is 2.2-3.3, and the concentration of the salt solution is 35.7-53.9 wt.%.
Further, the mass of the salt solution in the excitation component is higher than that of the alkali solution, and the mass ratio of the salt solution to the alkali solution is (1.0-4.0): 1.
further, the set-regulating component comprises a calcium compound comprising calcium oxide or calcium sulfate and/or a cement comprising portland cement or sulphoaluminate cement. Wherein the purity of the calcium oxide is more than or equal to 97%, the purity of the anhydrous calcium sulfate is more than or equal to 97%, the content of the calcium oxide in the silicate cement is more than or equal to 65%, and the content of the calcium oxide in the sulphoaluminate cement is more than or equal to 45%.
Further, the compressive strength of the early-alkali slag composite material after stirring and molding for 28 days at the temperature of minus 10-0 ℃ is more than or equal to 27MPa.
Further, the compressive strength of the early-alkali slag composite material after stirring and molding for 28 days at the temperature of minus 10 ℃ is more than or equal to 27MPa.
The second technical scheme of the invention is to provide a preparation method of the early-alkali slag composite material suitable for the negative temperature environment, which comprises the following steps:
preparing the mineral powder, quartz sand, early strength components, excitation components, coagulation regulating components and distilled water according to the mass parts;
when the coagulation regulating component is calcification, stirring the calcification to prepare active coagulation regulating liquid; mixing the mineral powder and the quartz sand uniformly to obtain an initial mixture; adding an excitation component and an active condensate into the initial mixture, and uniformly stirring to obtain an early-alkali slag composite material, namely a target product;
when the setting component is cement, mixing the mineral powder, quartz sand and cement until the mineral powder, the quartz sand and the cement are uniform to obtain an initial mixture; adding an excitation component into the initial mixed material, and uniformly stirring to obtain an early-alkali slag composite material, namely a target product;
when the setting component is calcification and cement, stirring the calcification to prepare active setting liquid; mixing the mineral powder, quartz sand and cement until the mineral powder, the quartz sand and the cement are uniform to obtain an initial mixture; and adding an excitation component and an active condensate into the initial mixture, and uniformly stirring to obtain the early-alkali slag composite material, namely the target product.
Further, in the preparation method, the dry materials are added first and then the liquid is added.
Further, the calcification is in the form of powdery solid initially, and the calcification is easier to disperse after being dissolved in distilled water to prepare active condensate.
The third technical scheme of the invention is to provide the application of the early-alkali slag composite material suitable for the negative temperature environment in the field of building materials.
Compared with the prior art, the invention has the following advantages:
(1) The invention relates to a preparation mechanism of a composite material of early-alkali slag: the excitation component serves as a core created by the whole invention and acts as a catalyst, so that the chemical activity of mineral powder, especially the lower freezing point (up to-30 ℃ depending on the composition of the excitation component) can be excited, the excitation component can be ensured to show stable and continuous excitation characteristics at-10 ℃ to excite the activity of the mineral powder at negative temperature, and the hydration reaction of the mineral powder can be continuously carried out at the negative temperature. The early strength component can be the nucleation point of the hydration reaction of alkali slag at negative temperature, and the early strength is improved. The setting component can promote the coagulation among cement particles to form a firm gel structure. Calcium ions in the setting component participate in hydration reaction of the early-alkali slag composite material to promote formation of hydration products, and the products have reinforcing and filling effects, so that the porosity in the alkali-activated cementing material is reduced, and the impermeability and freezing resistance are improved. The heat conductivity of the material can be regulated and controlled by regulating the types, the dosage and the proportion of the coagulation regulating components, and the heat preservation performance of the early-alkali slag composite material in a negative temperature environment is improved. Meanwhile, calcium ions in the coagulation regulating component can be used as a catalyst to promote hydration reaction, so that the hydration reaction of mineral powder is accelerated, and the energy release is increased. The release of this energy helps to increase the temperature and strength development of the alkali-activated gelling material.
(2) The exciting component used in the present invention remains in a liquid state at-10 ℃.
(3) The early-alkali slag composite material suitable for the negative temperature environment can reach the following technical standards: A. normal construction can be carried out within the range of-10 ℃ to 0 ℃; B. mechanical properties: the compressive strength of the product in 28 days is more than or equal to 27MPa.
(4) The invention can realize the accurate regulation and control of the construction time and the intensity by adjusting the mixing amount of the excitation component and the coagulation regulating component.
(5) The invention utilizes industrial waste materials such as mineral powder and the like, and has the advantages of solid waste and emission reduction.
(6) The early strength component and the coagulation regulating component used in the invention can completely participate in the reaction of the alkali-activated cementing material and do not contain Cl - The rust damage to the steel bar can not be generated.
Drawings
FIG. 1 is a graph showing compressive strengths of alkali slag composites prepared in examples 1 to 4 on days 1, 7 and 28;
FIG. 2 shows compressive strengths of alkali slag composites prepared in examples 5 to 7 on days 1, 7 and 28.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples. The present embodiment is implemented on the premise of the technical scheme of the present invention, and a detailed implementation manner and a specific operation process are given, but the protection scope of the present invention is not limited to the following examples. All other embodiments, based on the examples given, which a person of ordinary skill in the art would obtain without undue burden, are within the scope of protection of the present application.
In the following examples, the specific surface area of the ore powder was 428m 2 The chemical composition of the mineral powder comprises the following components: 51.3wt.% CaO,21.4wt.% SiO 2 14.1wt.% Al 2 O 3 6.3wt.% MgO,0.36wt.% Na 2 O; the purity of the NaOH particles is 96 percent, and the concentration of the NaOH solution is 14mol/L; liquid sodium silicate with modulus of 3.3 and liquid Na 2 SiO 3 The chemical composition and the content of (3) are as follows: 27.4wt.% SiO 2 8.3wt.% Na 2 O,64.3wt.% H 2 O。
Meanwhile, the raw materials in the embodiment are all commercial products, mineral powder is from a Lingshuxian ze macro mineral product processing plant, and Portland cement is 52.5 early strength cement in the field of the south of the Yangtze river; the sulphoaluminate cement is quick hardening sulphoaluminate cement, which is purchased from Shanghai construction materials limited company; naOH granulate is produced by shanghai taitan technologies inc; liquid sodium silicate was purchased from you rui refractory limited; calcium oxide is purchased from national pharmaceutical group chemical reagent company, and the purity is more than or equal to 97.0%; anhydrous calcium sulfate is purchased from Shanghai Taitan technology and technology Co., ltd, and the purity is more than or equal to 97.0%; the particle size of the quartz sand is 0.14mm-0.60mm, and the quartz sand is purchased from Shanghai Shengkua chemical industry Co., ltd; the trishydroxyethyl amine type early strength agent is purchased from Chenxin blue Star technology Co., ltd, is colorless transparent viscous liquid, has the purity of more than or equal to 85.0 percent and has the pH value of 10-12; the polycarboxylic acid type early strength agent is 540P type, is purchased from Shanghai-Ying sweater new material company, is white powdery solid, and has the purity of more than or equal to 99.0%; the nano crystal nucleus type early strength agent adopts SP15 type nano silicon dioxide, the purity is more than or equal to 99.5 percent, the appearance is white powder, and the specific surface area is 190-280 m 2 In the range of/g, the particle size is in the range of 10-35 nm, the pH value is in the range of 5-7, and the catalyst is purchased from Nanjing Xinyi synthetic technology Co.
The remaining materials or processing steps used, unless otherwise specified, represent existing conventional commercially available products or conventional techniques employed.
Example 1
The preparation method of the early-alkali slag composite material suitable for the negative temperature environment simulates the negative temperature environment, so that the preparation process of the early-alkali slag composite material is carried out at the temperature of minus 10 ℃ in the whole course, and comprises the following steps:
(1) According to the ingredients in Table 1, the mixture is placed at-10 ℃ for standing for 24 hours;
table 1 example 1 raw material blend ratio
(2) at-10deg.C, mixing mineral powder and quartz sand, slowly adding NaOH solution and liquid Na 2 SiO 3 Stirring to a homogeneous state, filling into a mould, compacting, trowelling and forming;
(3) And (3) vibrating compaction, trowelling and forming, wrapping the formed test piece by using a preservative film, and then immediately curing at-10 ℃ until the test age.
The compressive strengths of the early-alkali slag composite material prepared according to example 1 on days 1, 7 and 28 were 9.2MPa, 15.6MPa and 27.4MPa, respectively.
Example 2
The preparation method of the early-alkali slag composite material suitable for the negative temperature environment simulates the negative temperature environment, so that the preparation process of the early-alkali slag composite material is carried out at the temperature of minus 10 ℃ in the whole course, and comprises the following steps:
(1) Weighing mineral powder, quartz sand, a trishydroxyethyl amine type early strength agent, caO and anhydrous CaSO according to the following table 2 4 Standing in silicate cement and sulphoaluminate cement at-10 ℃ for 24 hours to reach the ambient temperature;
table 2 example 2 raw material blend ratio
(2) Next, caO and anhydrous CaSO are mixed 4 Dissolving in distilled water, stirring at 800r/min for 2min, stirring at 1200r/min for 1 min to obtain active condensate, and standing at-10deg.C until the temperature is constant;
(3) Further, uniformly mixing mineral powder, silicate cement, sulphoaluminate cement and quartz sand at the temperature of minus 10 ℃ to obtain an initial mixture;
(4) Finally, at the temperature of minus 10 ℃, the initial mixture is poured into NaOH solution and liquid Na in turn 2 SiO 3 And the prepared active condensate is stirred uniformly, stirred to be in a homogeneous state, put into a die for compaction, trowelled for forming, and a test piece formed by wrapping with a preservative film is immediately placed at-10 ℃ for curing until the test age.
The compressive strengths of the early-alkali slag composite material prepared according to example 2 on days 1, 7 and 28 were 11.2MPa, 17.8MPa and 32.9MPa, respectively.
Example 3
The preparation method of the early-alkali slag composite material suitable for the negative temperature environment simulates the negative temperature environment, so that the preparation process of the early-alkali slag composite material is carried out at the temperature of minus 10 ℃ in the whole course, and comprises the following steps:
(1) Weighing mineral powder, quartz sand, a trishydroxyethyl amine type early strength agent, anhydrous calcium sulfate, silicate cement and sulphoaluminate cement according to the table 3, and standing at-10 ℃ for 24 hours to reach the ambient temperature;
TABLE 3 example 3 raw material blend ratio
(2) Secondly, dissolving anhydrous calcium sulfate in distilled water, stirring the solution for 2min at 800r/min, stirring for 1 min at 1200r/min to prepare active condensate, and standing at-10 ℃ until the temperature is constant for later use;
(3) Further, uniformly mixing mineral powder, silicate cement, sulphoaluminate cement, early strength components and quartz sand at the temperature of minus 10 ℃ to obtain an initial mixture;
(4) Finally, at the temperature of minus 10 ℃, the initial mixture is poured into NaOH solution and liquid Na in turn 2 SiO 3 And the prepared activity-regulating condensate is stirred uniformly, stirred to a homogeneous state, put into a die for compaction, trowelled for forming, and a test piece formed by wrapping with a preservative film is immediately placed at the corresponding temperature of minus 10 DEG CAnd (5) maintaining until the testing age.
The compressive strengths of the early-alkali slag composite material prepared according to example 3, which was 1 st, 7 th and 28 th days, were 11.6MPa, 18.1MPa and 33.5MPa, respectively.
Example 4
The preparation method of the early-alkali slag composite material suitable for the negative temperature environment simulates the negative temperature environment, so that the preparation process of the early-alkali slag composite material is carried out at the temperature of minus 10 ℃ in the whole course, and comprises the following steps:
(1) Weighing mineral powder, quartz sand, a trishydroxyethyl amine type and polycarboxylic acid type early strength agent, caO, silicate cement and sulphoaluminate cement according to the table 4, and standing at-10 ℃ for 24 hours to reach the ambient temperature;
TABLE 4 example 4 raw material blend ratio
(2) Secondly, dissolving CaO in distilled water, stirring the solution for 2min at 800r/min, stirring for 1 min at 1200r/min to prepare active condensate, and standing at-10 ℃ until the temperature is constant for later use;
(3) Further, uniformly mixing mineral powder, silicate cement, sulphoaluminate cement, a tri-hydroxyethyl amine type and polycarboxylic acid type early strength agent and quartz sand at the temperature of minus 10 ℃ to obtain an initial mixture;
(4) Finally, at the temperature of minus 10 ℃, the initial mixture is poured into NaOH solution and liquid Na in turn 2 SiO 3 And the prepared active condensate is stirred uniformly, stirred to be in a homogeneous state, put into a die for compaction, trowelled for forming, and a test piece formed by wrapping with a preservative film is immediately placed at the corresponding temperature of minus 10 ℃ for curing until the test age.
The compressive strengths of the early-alkali slag composite material prepared according to example 4 on days 1, 7 and 28 were 12.2MPa, 19.9MPa and 35.3MPa, respectively.
Example 5
The preparation method of the early-alkali slag composite material suitable for the negative temperature environment simulates the negative temperature environment, so that the preparation process of the early-alkali slag composite material is carried out at the temperature of minus 10 ℃ in the whole course, and comprises the following steps:
(1) Weighing mineral powder, quartz sand, a nanocrystal core type early strength agent, analytically pure anhydrous calcium sulfate and sulphoaluminate cement according to the table 5, and standing at-10 ℃ for 24 hours to reach the ambient temperature;
TABLE 5 example 5 raw material blend ratio
(2) Secondly, dissolving anhydrous calcium sulfate in distilled water, stirring the solution for 2min at 800r/min, stirring for 1 min at 1200r/min to prepare active condensate, and standing at-10 ℃ until the temperature is constant for later use;
(3) Further, uniformly mixing mineral powder, sulphoaluminate cement, a nanocrystal core type early strength agent and quartz sand at the temperature of minus 10 ℃ to obtain an initial mixture;
(4) Finally, at the temperature of minus 10 ℃, the initial mixture is poured into NaOH solution and liquid Na in turn 2 SiO 3 And the prepared active condensate is stirred uniformly, stirred to be in a homogeneous state, put into a die for compaction, trowelled for forming, and a test piece formed by wrapping with a preservative film is immediately placed at the corresponding temperature of minus 10 ℃ for curing until the test age.
The compressive strengths of the early-alkali slag composite material prepared according to example 5, which was 1 st, 7 th and 28 th days, were 9.9MPa, 16.6MPa and 28.9MPa, respectively.
Example 6
The preparation method of the early-alkali slag composite material suitable for the negative temperature environment simulates the negative temperature environment, so that the preparation process of the early-alkali slag composite material is carried out at the temperature of minus 10 ℃ in the whole course, and comprises the following steps:
(1) Weighing mineral powder, quartz sand, a trihydroxyethyl amine type early strength agent, a polycarboxylic acid type early strength agent, a nanocrystal core type early strength agent, anhydrous calcium sulfate, silicate cement and sulphoaluminate cement according to the table 6, and standing at-10 ℃ for 24 hours to reach the ambient temperature;
TABLE 6 raw material blend ratio of EXAMPLE 6
(2) Secondly, dissolving anhydrous calcium sulfate in distilled water, stirring the solution for 2min at 800r/min, stirring for 1 min at 1200r/min to prepare active condensate, and standing at-10 ℃ until the temperature is constant for later use;
(3) Further, uniformly mixing mineral powder, silicate cement, sulphoaluminate cement, a trishydroxyethyl amine type early strength agent, a polycarboxylic acid type early strength agent, a nanocrystal core type early strength agent and quartz sand at the temperature of minus 10 ℃ to obtain an initial mixture;
(4) Finally, at the temperature of minus 10 ℃, the initial mixture is poured into NaOH solution and liquid Na in turn 2 SiO 3 And the prepared active condensate is stirred uniformly, stirred to be in a homogeneous state, put into a die for compaction, trowelled for forming, and a test piece formed by wrapping with a preservative film is immediately placed at the corresponding temperature of minus 10 ℃ for curing until the test age.
The compressive strengths of the early-alkali slag composite material prepared according to example 6 on days 1, 7 and 28 were 11.9MPa, 20.5MPa and 35.4MPa, respectively.
Example 7
The preparation method of the early-alkali slag composite material suitable for the negative temperature environment simulates the negative temperature environment, so that the preparation process of the early-alkali slag composite material is carried out at the temperature of minus 10 ℃ in the whole course, and comprises the following steps:
(1) Weighing mineral powder, quartz sand, a polycarboxylic acid type early strength agent, caO and sulphoaluminate cement according to the table 7, and standing at-10 ℃ for 24 hours to reach the ambient temperature;
TABLE 7 raw material blend ratio
(2) Secondly, dissolving CaO in distilled water, stirring the solution for 2min at 800r/min, stirring for 1 min at 1200r/min to prepare active condensate, and standing at-10 ℃ until the temperature is constant for later use;
(3) Further, uniformly mixing mineral powder, sulphoaluminate cement, a polycarboxylic acid type early strength agent and quartz sand at the temperature of minus 10 ℃ to obtain an initial mixture;
(4) Finally, at the temperature of minus 10 ℃, the initial mixture is poured into NaOH solution and liquid Na in turn 2 SiO 3 And the prepared active condensate is stirred uniformly, stirred to be in a homogeneous state, put into a die for compaction, trowelled for forming, and a test piece formed by wrapping with a preservative film is immediately placed at the corresponding temperature of minus 10 ℃ for curing until the test age.
The compressive strengths of the early-alkali slag composite material prepared according to example 7 on days 1, 7 and 28 were 10.1MPa, 16.9MPa and 29.8MPa, respectively.
The compression strengths of the alkali slag composite materials prepared in examples 1 to 7 on days 1, 7 and 28 are plotted as shown in fig. 1 and 2, and table 8 shows the proportions of the raw materials and the results of the compression strengths of examples 1 to 7.
Table 8 results of raw material compounding ratios and compressive strengths of examples 1 to 7
As can be seen from fig. 1 and 2 and the above table, the ingredients of examples 1 to 7 comprehensively consider the particle size distribution curve of the dry materials (mineral powder and quartz sand) after mixing, and ensure that the dry materials are in a close-packed state. The added excitation component ensures that the mass ratio of the excitation component to the dry material is controlled between 0.516 and 0.620, so that the prepared material has good working performance and is convenient for construction while the material shows ideal compressive strength.
Comparative example 1
Most of the same as in example 1 except for reducing the amount of the exciting component, the amount of the exciting component was 120 parts, in which the amount of NaOH solution was 40 parts, liquid Na 2 SiO 3 The amount of (2) was 80 parts. The working performance of the material obtained after stirring is too poor to be molded.
Comparative example 2
As compared with example 1, the method is largely the same except that the mass ratio of liquid sodium silicate to NaOH solution in the excitation component is adjusted to 5.0, i.e. the mass fraction of NaOH solution is 60, liquid Na 2 SiO 3 The mass fraction of the material is 300, and the material obtained after stirring is quickly solidified and hardened in a stirring container and cannot be molded.
Comparative example 3
In the cement-based composite material prepared by replacing the exciting component with tap water and replacing the mineral powder with silicate cement, as compared with example 1, most of the materials are the same, since tap water is already frozen at-10 ℃, only the solid raw materials are placed at-10 ℃ for standing for 24 hours, and tap water is used in a normal temperature state. The raw materials are stirred and mixed uniformly and then are maintained at the temperature of minus 10 ℃ for 7 days without hardening.
Comparative example 4
In comparison with example 1, most of the same was made except that the excitation component was replaced with tap water, which was used in a normal temperature state, since tap water had already been frozen at-10℃and was left standing at-10℃for 24 hours, only the solid raw material was left to stand. The raw materials are stirred and mixed uniformly and then are maintained at the temperature of minus 10 ℃ for 3 days without hardening.
Comparative example 5
In comparison with example 1, the same process was carried out in a large part except that only NaOH solution was used as the excitation component, and the raw materials were stirred and mixed uniformly and then left to stand at-10℃for 3 days without hardening.
Comparative example 6
As compared with example 1, the same is used for the most part except that only liquid Na is used as the excitation component 2 SiO 3 . The raw materials are stirred and mixed uniformly and then are maintained at the temperature of minus 10 ℃ for 3 days without hardening.
Comparative example 7
As compared with example 1, all the components were the same except that 6mol/L NaOH solution was used, and at this time, the prepared excitation component was coagulated at-10℃and thus could not be molded by stirring at-10 ℃.
Comparative example 8
In comparison with example 1, the same is used for the most part, except that the salt solution of the excitation component is NaCl solution. The raw materials are stirred and mixed uniformly and then are maintained at the temperature of minus 10 ℃ for 3 days without hardening.
The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present invention. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above-described embodiments, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present invention.
Claims (10)
1. The early-alkali slag composite material suitable for the negative temperature environment is characterized by comprising the following raw material components: mineral powder, quartz sand, early strength components, excitation components, coagulation regulating components and water; the mineral powder is 349-551 parts by weight, the quartz sand is 680-800 parts by weight, the early strength component is 0-15 parts by weight, the excitation component is 180-330 parts by weight, the coagulation regulating component is 0-72 parts by weight, and the water is 0-30 parts by weight.
2. The early-alkali slag composite material suitable for the negative temperature environment according to claim 1, wherein,the mineral powder is blast furnace fine slag, the grain diameter is 0.04-133.74 mu m, and the specific area is not less than 428m 2 /kg。
3. The early-alkali slag composite material suitable for a negative temperature environment according to claim 2, wherein the chemical composition of the mineral powder comprises the following components: 45.5 to 51.3wt.% CaO,21.4 to 30.0wt.% SiO 2 12.3wt.% to 14.1wt.% Al 2 O 3 2.8 to 6.3wt.% MgO,0.29 to 0.36wt.% Na 2 O。
4. The early-alkali slag composite material suitable for a negative temperature environment according to claim 1, wherein the early-strength component comprises one or more of a tri-hydroxyethyl amine type early-strength agent, a polycarboxylic acid type early-strength agent or a nanocrystal core type early-strength agent.
5. The early-alkali slag composite material suitable for use in a negative temperature environment of claim 1, wherein the exciting component comprises an alkali solution and a salt solution;
the mass of the salt solution in the excitation component is higher than that of the alkali solution, and the mass ratio of the salt solution to the alkali solution is (1.0-4.0): 1, a step of;
the alkali solution comprises one or more of sodium hydroxide solution, calcium hydroxide solution and potassium hydroxide solution;
the salt solution comprises one or more of potassium silicate solution, sodium silicate solution, potassium carbonate solution or sodium carbonate solution.
6. The early-alkali slag composite material suitable for use in a negative temperature environment according to claim 5, wherein the concentration of the alkali solution is 8-16 mol/L, the modulus of the salt solution is 2.2-3.3, and the concentration of the salt solution is 35.7-53.9 wt.%.
7. A slag composite of early and strong alkali suitable for use in a cold environment according to claim 1, wherein the set-regulating component comprises calcifications including calcium oxide or calcium sulfate and/or cement including portland cement or sulphoaluminate cement.
8. The early-alkali slag composite material suitable for a negative temperature environment according to claim 1, wherein the compressive strength of the early-alkali slag composite material after being stirred and molded for 28 days at the temperature of minus 10 ℃ is more than or equal to 27MPa.
9. The method for preparing the early-alkali slag composite material suitable for the negative temperature environment according to any one of claims 1 to 8, which is characterized by comprising the following steps:
preparing materials from the mineral powder, quartz sand, early strength components, excitation components, coagulation regulating components and water according to the mass parts;
when the coagulation regulating component is calcification, stirring the calcification to prepare active coagulation regulating liquid; mixing the mineral powder and the quartz sand uniformly to obtain an initial mixture; adding an excitation component and an active condensate into the initial mixture, and uniformly stirring to obtain an early-alkali slag composite material, namely a target product;
when the setting component is cement, mixing the mineral powder, quartz sand and cement until the mineral powder, the quartz sand and the cement are uniform to obtain an initial mixture; adding an excitation component into the initial mixed material, and uniformly stirring to obtain an early-alkali slag composite material, namely a target product;
when the setting component is calcification and cement, stirring the calcification to prepare active setting liquid; mixing the mineral powder, quartz sand and cement until the mineral powder, the quartz sand and the cement are uniform to obtain an initial mixture; and adding an excitation component and an active condensate into the initial mixture, and uniformly stirring to obtain the early-alkali slag composite material, namely the target product.
10. The use of an early-alkali slag composite material according to any one of claims 1 to 7 in the field of building materials, suitable for use in a negative temperature environment.
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