CN117303810A - Fiber-reinforced regenerated sand high-temperature-resistant geopolymer and preparation method thereof - Google Patents
Fiber-reinforced regenerated sand high-temperature-resistant geopolymer and preparation method thereof Download PDFInfo
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- CN117303810A CN117303810A CN202311607748.3A CN202311607748A CN117303810A CN 117303810 A CN117303810 A CN 117303810A CN 202311607748 A CN202311607748 A CN 202311607748A CN 117303810 A CN117303810 A CN 117303810A
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- reclaimed sand
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- 239000004576 sand Substances 0.000 title claims abstract description 53
- 229920000876 geopolymer Polymers 0.000 title claims abstract description 47
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000000835 fiber Substances 0.000 claims abstract description 85
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 52
- 239000000463 material Substances 0.000 claims abstract description 41
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 23
- 239000011707 mineral Substances 0.000 claims abstract description 23
- 239000000843 powder Substances 0.000 claims abstract description 23
- 239000003513 alkali Substances 0.000 claims abstract description 21
- 239000002994 raw material Substances 0.000 claims abstract description 21
- 229910021487 silica fume Inorganic materials 0.000 claims abstract description 20
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 41
- 239000002121 nanofiber Substances 0.000 claims description 37
- 229910000831 Steel Inorganic materials 0.000 claims description 34
- 239000010959 steel Substances 0.000 claims description 34
- 239000012209 synthetic fiber Substances 0.000 claims description 34
- 229920002994 synthetic fiber Polymers 0.000 claims description 34
- 239000003638 chemical reducing agent Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 17
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 11
- 235000019353 potassium silicate Nutrition 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 7
- 239000002002 slurry Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 230000004048 modification Effects 0.000 claims description 5
- 238000012986 modification Methods 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- FDRCDNZGSXJAFP-UHFFFAOYSA-M sodium chloroacetate Chemical compound [Na+].[O-]C(=O)CCl FDRCDNZGSXJAFP-UHFFFAOYSA-M 0.000 claims description 3
- OVYTZAASVAZITK-UHFFFAOYSA-M sodium;ethanol;hydroxide Chemical compound [OH-].[Na+].CCO OVYTZAASVAZITK-UHFFFAOYSA-M 0.000 claims description 3
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 238000007747 plating Methods 0.000 claims description 2
- 238000007493 shaping process Methods 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims 1
- 239000004566 building material Substances 0.000 abstract description 14
- 230000009172 bursting Effects 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 6
- 229910052799 carbon Inorganic materials 0.000 abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 3
- 230000005284 excitation Effects 0.000 abstract description 3
- 238000004064 recycling Methods 0.000 abstract description 3
- 239000004568 cement Substances 0.000 abstract description 2
- 230000001737 promoting effect Effects 0.000 abstract description 2
- 230000002787 reinforcement Effects 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 10
- 230000007547 defect Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000011161 development Methods 0.000 description 6
- 244000198134 Agave sisalana Species 0.000 description 5
- 208000010392 Bone Fractures Diseases 0.000 description 5
- 206010017076 Fracture Diseases 0.000 description 5
- 239000011398 Portland cement Substances 0.000 description 5
- 239000004567 concrete Substances 0.000 description 5
- 238000001514 detection method Methods 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 239000010813 municipal solid waste Substances 0.000 description 5
- 230000002195 synergetic effect Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002861 polymer material Substances 0.000 description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 239000004115 Sodium Silicate Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000003469 silicate cement Substances 0.000 description 2
- 229910052911 sodium silicate Inorganic materials 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 240000000491 Corchorus aestuans Species 0.000 description 1
- 235000011777 Corchorus aestuans Nutrition 0.000 description 1
- 235000010862 Corchorus capsularis Nutrition 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 229920003041 geopolymer cement Polymers 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000007363 ring formation reaction Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/006—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing mineral polymers, e.g. geopolymers of the Davidovits type
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/48—Metal
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B16/04—Macromolecular compounds
- C04B16/06—Macromolecular compounds fibrous
- C04B16/0616—Macromolecular compounds fibrous from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B16/0625—Polyalkenes, e.g. polyethylene
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B16/04—Macromolecular compounds
- C04B16/06—Macromolecular compounds fibrous
- C04B16/0616—Macromolecular compounds fibrous from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B16/0625—Polyalkenes, e.g. polyethylene
- C04B16/0633—Polypropylene
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B16/04—Macromolecular compounds
- C04B16/06—Macromolecular compounds fibrous
- C04B16/0616—Macromolecular compounds fibrous from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B16/0641—Polyvinylalcohols; Polyvinylacetates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/12—Waste materials; Refuse from quarries, mining or the like
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/146—Silica fume
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/18—Waste materials; Refuse organic
- C04B18/24—Vegetable refuse, e.g. rice husks, maize-ear refuse; Cellulosic materials, e.g. paper, cork
- C04B18/248—Vegetable refuse, e.g. rice husks, maize-ear refuse; Cellulosic materials, e.g. paper, cork from specific plants, e.g. hemp fibres
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Geochemistry & Mineralogy (AREA)
- Botany (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the technical field of cement-based building materials, in particular to a fiber-reinforced regenerated sand high-temperature-resistant geopolymer and a preparation method thereof. According to the invention, mineral powder and silica fume are used as active raw materials, a cementing material is obtained by adopting an alkali excitation mode, reclaimed sand is used as fine aggregate, and multi-scale fiber reinforcement is used as auxiliary material, so that the geopolymer gel is prepared, has the advantages of high strength, high hardening speed, high temperature resistance, bursting resistance, environmental friendliness and sustainability, and has important significance in promoting the recycling of building materials, green low carbon, fireproof of buildings and engineering structures and the like.
Description
Technical Field
The invention relates to the technical field of cement-based building materials, in particular to a fiber-reinforced regenerated sand high-temperature-resistant geopolymer and a preparation method thereof.
Background
Ordinary Portland cement is one of the most widely applied materials in the field of building materials, however, the production process of ordinary Portland cement is accompanied with a large amount of greenhouse gas emission and consumption of energy and resources, and the requirements of energy conservation, environmental protection, green ecology sustainable development cannot be met.
In the process of urban construction, resources such as natural sand and stone are excessively exploited, so that a large amount of resources are in shortage.
Meanwhile, a large amount of garbage is generated in the processes of dismantling the original building, engineering construction and producing building materials, the garbage is difficult to treat and can pollute the environment, and how to treat the garbage is an urgent problem to be solved.
If the garbage can be recycled and made into reclaimed sand as a building material raw material, the garbage disposal problem can be solved, the exploitation of natural sand can be saved, the production cost can be reduced, the natural resources can be protected, the land pollution can be reduced, the strategy of sustainable development can be implemented, and the reclaimed sand has great advantages in the building material.
The geopolymer is a three-dimensional network gel prepared by taking natural minerals or solid wastes containing inorganic aluminosilicate as raw materials under the catalysis condition of a chemical excitant.
Compared with ordinary Portland cement, the geopolymer material has the advantages of low pollution, low energy consumption, low cost of required raw materials, wide sources, capability of recycling a large amount of industrial waste residues, capability of preparing geopolymer concrete after adding various natural sand or regenerated sand and other coarse and fine aggregates, high strength, high hardening speed, high temperature resistance and the like, and can meet the requirements of modern engineering structures and the time requirements of energy conservation, environmental protection, green ecology and sustainability.
The geopolymer is an ideal choice for replacing common Portland cement, has wide application prospect in engineering fields such as roads, bridges, tunnels and the like, accords with the new green development theme, and has great application value in the process of advancing the building industry to the green building.
Although the geopolymer material has a plurality of advantages, the geopolymer material has the same part of defects as common concrete after being solidified, has lower tensile and bending strength and stronger brittleness, is easy to generate brittle fracture, has small deformation of components before the brittle fracture occurs, and has no obvious early warning before the fracture; for high-performance geopolymer materials, the aggregate is less, the proportion of the cementing material is large, the problem of dry shrinkage is caused, the internal vapor pressure of the materials is difficult to release to cause bursting and peeling phenomena due to low porosity in the face of fire, the mechanical properties of the materials are rapidly reduced due to the reduction of the sectional area of the materials, serious potential safety hazards are caused, and the large-scale application of the geopolymer materials in construction engineering is limited, so that the requirements of toughness improvement, deformation resistance, high temperature resistance, dry shrinkage improvement and the like are met.
Although the research on the defects of various existing building materials is broken through, the research and exploration on the composite engineering building materials which can have the characteristics of high temperature resistance, high performance, low cost or environmental protection, sustainability and the like are lacking.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention provides the fiber-reinforced regenerated sand high-temperature-resistant geopolymer, which uses mineral powder and silica fume as active raw materials, adopts an alkali excitation mode to obtain a cementing material, uses the regenerated sand as fine aggregate and is assisted by multi-scale fiber reinforcement, so that the prepared geopolymer gel has the advantages of high strength, high hardening speed, high temperature resistance, bursting resistance, environmental friendliness and sustainability, and has important significance in promoting the recycling of building materials, green low carbon, fire prevention of buildings and engineering structures and the like.
Specifically, the preparation method of the fiber-reinforced reclaimed sand high-temperature-resistant geopolymer comprises the following steps:
1) Weighing the raw materials according to the proportion,
2) The surface of the synthetic fiber is oiled for a plurality of times to obtain the modified synthetic fiber,
3) Soaking nanofiber in ethanol-sodium hydroxide solution for alkali washing, heating, adding appropriate amount of sodium chloroacetate for modification, cleaning, adding sodium hydroxide for uniform ultrasonic dispersion, adding sodium hydroxide for uniform stirring to obtain nanofiber alkali excitant,
4) Sequentially adding mineral powder, silica fume, reclaimed sand and high-efficiency water reducer into the nanofiber alkali excitant, stirring uniformly, sequentially adding steel fiber, water and modified synthetic fiber, stirring uniformly, performing ultrasonic vibration to obtain geopolymer slurry,
5) And (3) shaping, vibrating, demolding and curing the slurry to obtain the finished product.
The invention selects mineral powder and silica fume as active raw materials, thereby matching with reclaimed sand and meeting the requirements of fluidity and workability.
According to the invention, firstly, after nanofiber is pretreated, an alkali excitant is added to prepare the nanofiber alkali excitant, and the research of the invention shows that the nanofiber alkali excitant is a nanofiber adding mode for ensuring uniform dispersion of nanofibers in a cementing material; meanwhile, sodium hydroxide is dissolved in the dispersion liquid of the nanofibers, and the sodium silicate modulus of the alkali-activated agent can be adjusted by calculating the proportion; the nanofiber alkali excitant is used for starting the solidification of the geopolymer raw material, so that the nanofiber can participate in the establishment of a microstructure in early reaction, and the nanofiber alkali excitant can have a multi-purpose effect.
The mixing sequence of the invention is critical, if the nano fiber alkali excitant is added into the dry mixture such as mineral powder, local rapid reaction is easy to cause, so that insufficient and uneven reaction causes technological defects, further material performance loss and weak positions are increased, the fiber adding sequence is also critical, in the fiber adding process, the steel fibers and water are fully stirred to form slurry, and finally the modified synthetic fibers are gradually added and continuously stirred, so that the defects of poor fiber dispersibility, pores and the like caused by possible agglomeration accumulation of the modified synthetic fibers when the modified synthetic fibers are directly contacted with water are avoided.
Specifically, the geopolymer consists of a main material and multi-scale fibers, wherein the main material consists of the following raw materials in parts by weight: 700-900 parts of mineral powder, 150-250 parts of silica fume, 1200-1400 parts of reclaimed sand, 170-250 parts of water glass, 28-45 parts of sodium hydroxide, 110-160 parts of water, 8-18 parts of high-efficiency water reducer, and a multi-scale fiber is composed of steel fibers, modified synthetic fibers and nano fibers, wherein the nano fibers are nano plant fibers, the steel fibers and the modified synthetic fibers are added according to a volume ratio of 1-2:1, the volume mixing amount of the two is 2-5% of that of a geopolymer material, and the adding amount of the nano fibers is 0.5-1wt% of the mass of a main material.
The invention is characterized in that the raw materials are conveniently obtained in production, slag, silica fume, reclaimed sand, water glass, sodium hydroxide, water and high-efficiency water reducing agent are all weighed according to parts by weight, steel fibers and modified synthetic fibers in the multi-scale fibers are weighed according to the volume ratio of geopolymer materials, and nano fibers are weighed according to the mass ratio of a main material doping method.
Preferably, step 3) is heated to 70-90 ℃, and the washing is repeatedly performed for 4-8 times by deionized water.
Preferably, the step 3) and the step 4) adopt a forced stirrer, and the rotating speed is not less than 120r/min.
Preferably, the step 5) of vibrating adopts a vibrating table for vibrating, and the curing adopts standard curing. More preferably, the mold is removed 24 hours after compacting by vibration, the curing time is 28 days, the curing temperature is 18-24 ℃, and the humidity is 90%.
Preferably, the mineral powder is S95 grade mineral powder.
Preferably, the silica fume has a particle size of 0.1-0.2 μm.
Preferably, the particle size of the reclaimed sand is 0.045-2mm. The use of the reclaimed sand can improve the utilization rate of waste, realize the aim of green and environment-friendly sustainable development, and the graded reclaimed sand can fill the gaps, improve the structural stability and improve the mechanical property.
Preferably, the high-efficiency water reducer is a polycarboxylic acid high-efficiency water reducer, and the water reducing rate is more than 20%.
Preferably, the steel fiber is linear copper plating steel fiber with the density of 7.9g/cm 3 The length is 15-20mm, the diameter is 0.2mm, and the tensile strength of the steel fiber is more than 2000MPa.
Preferably, the synthetic fiber has a length of 12-15mm, a diameter of 30 mu m and a tensile strength of not less than 1.4GPa, is selected from at least one of PE fiber, polypropylene fiber or polyvinyl alcohol fiber, and is subjected to surface modification by surface oiling treatment, so that the interface behavior is adjusted to improve the performance, the phenomenon that the surface is hydrophilic and the surface is excessively high in adhesive force to cause early fracture when being in tensile stress is avoided, and the synergistic effect of the surface and the steel fiber is fully exerted.
Preferably, the nanofibers are nanofibers such as jute, sisal.
The invention adopts steel fiber, modified synthetic fiber and nano fiber as multi-scale fiber, the steel fiber has excellent mechanical property, can obviously improve the strength of the polymer material and strengthen the ductility of the polymer material, the fiber reinforcing effect depends on the bonding condition between the fiber and a matrix to a great extent, the surface of the synthetic fiber is modified to improve the interface bonding performance, the toughness of the polymer material can be obviously improved, and the coarse steel fiber and the fine synthetic fiber fully play the synergistic effect of the multi-scale fiber to obtain the reinforcing and toughening effect.
The synthetic fiber can be used for reinforcing and toughening, the characteristic of low fiber melting point can be utilized, channels are provided for the inside of the material by melting at high temperature, the vapor pressure accumulated in the inside is released, the bursting phenomenon at high temperature is effectively inhibited, the rapid decline of the mechanical property of the geopolymer material is avoided, the melting point of the steel fiber is high, and the working performance of the steel fiber can be maintained even at high temperature.
The addition of the nanofibers is synergistic at the microscopic level, so that the microstructure is more compact, the crystal bridging is stronger, and the generation and the expansion of defects can be inhibited.
The invention also relates to a high-temperature-resistant geopolymer of the fiber reinforced reclaimed sand, and in particular relates to the fiber reinforced reclaimed sand.
The invention is different from the traditional building material, thoroughly discards the use of Portland cement, uses low-cost raw materials as much as possible, utilizes multi-scale fibers of different materials and different sizes to strengthen geopolymer, and adds reclaimed sand to prepare the green building material finally in an alkali excitation mode, and has the characteristics of high strength, high hardening speed, high ductility, low shrinkage, high temperature resistance, high durability and the like.
The invention not only improves the defects of the traditional concrete, but also promotes the sustainable green development of low cost, high performance and green environmental protection in the engineering and building industry, and has excellent high temperature resistance, so that the invention has great application value in the aspects of fire prevention and fire safety of building structures.
Compared with the prior art, the invention has the following technical advantages:
(1) The invention adopts the raw materials of mineral powder, silica fume, reclaimed sand and other low-cost raw materials, realizes the green cyclic cyclization of industrial waste and adopts a technical route of using geopolymer, has wide sources of materials, reduces the dependence on natural resources, eliminates the use of silicate cement by using cementing materials, avoids a great amount of carbon emission and energy waste during the production of the silicate cement, accords with the new energy-saving, environment-friendly, green and low-carbon sustainable development targets, and ensures that the cementing material system consisting of mineral powder and silica fume is more suitable for the use of reclaimed sand, reduces the performance damage caused by poor particle size, poor grading and high stone powder content to concrete;
(2) The geopolymer material has the advantages of good durability, high strength, high hardening speed, good impermeability and the like as a building material, the compressive strength of the material is further enhanced and improved by utilizing the multi-scale fibers, the geopolymer material can be used for bearing building structures, and can replace and surpass most traditional concrete building materials;
(3) The invention uses the multi-scale fiber, wherein the synthetic fiber is modified, the interface performance of the synthetic fiber is improved, the synthetic fiber is better matched with the steel fiber with high tensile strength, the existence of the fiber has a strong constraint function on a matrix, the dry shrinkage of the fiber is limited, the ductility of the material is improved, the defect of easy brittle fracture is improved, the multi-scale fiber has better durability, the multi-scale fiber is mutually matched from macroscopic and microscopic, a more compact structure and stronger connection are formed at microscopic level, the synergistic effect of the steel fiber and the synthetic fiber is exerted at macroscopic level, the cracking of the material is inhibited, and the material is reinforced and toughened;
(4) The invention has excellent high temperature resistance and great potential in fireproof building structure and special application environment.
The invention uses the multi-scale fiber, fully utilizes the characteristic of low melting point of the synthetic fiber, and the synthetic fiber is melted after high temperature to provide a dissipation passage for water vapor, so as to release vapor pressure in a matrix, effectively avoid bursting phenomenon at high temperature, and avoid rapid decrease of mechanical property caused by reduction of cross sectional area due to large-area bursting.
The steel fiber has higher melting point, can still exert high tensile strength at high temperature, and can effectively improve the residual mechanical property of the concrete after being subjected to high temperature.
The nanofiber and the matrix cementing material are lapped and filled in the reaction process and the subsequent maintenance stage to generate a more compact three-dimensional structure, the integrity of the continuous microstructure in the matrix can be maintained, and the synergistic effect of the multi-scale fibers enables the composite material to have good fire resistance and high temperature resistance.
Detailed Description
In order to better explain the technical effect of the invention, the fiber reinforced reclaimed sand high-temperature-resistant geopolymer is prepared and the performance thereof is detected.
In the test process, the preparation method of the fiber reinforced reclaimed sand high-temperature-resistant geopolymer comprises the following steps: 1) weighing the raw materials according to the proportion, 2) oiling the surface of the polyvinyl alcohol fiber for 3 times to obtain modified synthetic fibers, 3) soaking and alkali washing the nano sisal fibers in an ethanol-sodium hydroxide solution, heating to 80 ℃, adding sodium chloroacetate accounting for 3wt% of the mass of the nano sisal fibers for modification, cleaning by deionized water, adding sodium silicate for ultrasonic dispersion uniformly, adding the weighed sodium hydroxide, stirring uniformly to obtain a nano fiber alkali excitant, 4) sequentially adding mineral powder, silica fume, reclaimed sand and a high-efficiency water reducer into the nano fiber alkali excitant, stirring uniformly, sequentially adding steel fibers, water and modified synthetic fibers, stirring uniformly, performing ultrasonic vibration to obtain geopolymer slurry, and 5) molding, vibrating, demoulding for 24 hours, and performing standard maintenance to 28d to obtain the modified sisal fiber alkali excitant.
Wherein the mineral powder is S95 grade mineral powder with specific surface area of 435m 2 Per kg, density of 2.88g/cm 3 The silica fume has a particle size of 0.1-0.2 μm and a density of 2.2g/cm 3 Specific surface area of 19.22m 2 Per gram, the particle size of the reclaimed sand is 0.045-2mm, the high-efficiency water reducer is a polycarboxylic acid high-efficiency water reducer, the water reducing rate is more than 20%, the steel fiber is selected from linear copper-plated steel fibers, and the density is 7.9g/cm 3 The length is 15-20mm, the diameter is 0.2mm, the tensile strength of the steel fiber is more than 2000MPa, the length of the polyvinyl alcohol fiber is 12-15mm, the diameter is 30 mu m, and the tensile strength is not less than 1.4GPa.
In the process of weighing materials, slag, silica fume, reclaimed sand, water glass, sodium hydroxide, water and high-efficiency water reducing agent are all weighed according to parts by weight, steel fibers and modified synthetic fibers in the multi-scale fibers are weighed according to the volume ratio of geopolymer materials, and nano fibers are weighed according to the mass ratio of a main material doping method.
Example 1
The fiber reinforced regenerated sand high temperature resistant geopolymer consists of the following raw materials: 800 parts of mineral powder, 200 parts of silica fume, 1340 parts of reclaimed sand, 200 parts of water glass, 33.76 parts of sodium hydroxide, 160 parts of water, 12 parts of high-efficiency water reducer, 1% of steel fiber volume, 1% of modified synthetic fiber volume and 1% of nanofiber.
The test shows that the compressive strength of the 28d test piece at normal temperature is 113.8MPa, the flexural strength is 14.1MPa, the compressive strength after 200 ℃ treatment is 105.1 MPa, the compressive strength after 400 ℃ treatment is 60.7 MPa, and the compressive strength after 600 ℃ treatment is 38.3 MPa.
Example 2
The fiber reinforced regenerated sand high temperature resistant geopolymer consists of the following raw materials: 800 parts of mineral powder, 200 parts of silica fume, 1260 parts of reclaimed sand, 200 parts of water glass, 33.76 parts of sodium hydroxide, 140 parts of water, 10 parts of high-efficiency water reducer, 1% of steel fiber volume, 1% of modified synthetic fiber volume and 1% of nanofiber.
Through detection, the compressive strength of the 28d test piece at normal temperature is 120.1MPa, and the flexural strength is 14.3MPa. The compressive strength after 200 ℃ treatment is 111.2 MPa, the compressive strength after 400 ℃ treatment is 63.8 MPa, and the compressive strength after 600 ℃ treatment is 40.1 MPa.
Example 3
The fiber reinforced regenerated sand high temperature resistant geopolymer consists of the following raw materials: 850 parts of slag, 250 parts of silica fume, 1400 parts of reclaimed sand, 200 parts of water glass, 33.76 parts of sodium hydroxide, 180 parts of water, 14 parts of high-efficiency water reducer, 1% of steel fiber volume, 1% of modified synthetic fiber volume and 1% of nanofiber.
Through detection, the compressive strength of the 28d test piece at normal temperature is 116.9MPa, and the flexural strength is 14.0MPa. The compressive strength after 200 ℃ treatment is 107.8 MPa, the compressive strength after 400 ℃ treatment is 60.9 MPa, and the compressive strength after 600 ℃ treatment is 39.6MPa.
Comparative example 1
A geopolymer consisting of the following raw materials: 800 parts of mineral powder, 200 parts of fly ash, 1260 parts of reclaimed sand, 200 parts of water glass, 33.76 parts of sodium hydroxide, 140 parts of water, 10 parts of high-efficiency water reducer, 1% of steel fiber volume, 1% of modified synthetic fiber volume and 1% of nanofiber.
Through detection, the compressive strength of the 28d test piece at normal temperature is 96.8MPa, and the flexural strength is 11.2MPa. The compressive strength after 200 ℃ treatment is 80.3 MPa, and the compressive strength after 400 ℃ treatment is 42.5 MPa.
Comparative example 2
A geopolymer consisting of the following raw materials: 800 parts of mineral powder, 200 parts of silica fume, 1260 parts of reclaimed sand, 200 parts of water glass, 33.76 parts of sodium hydroxide, 140 parts of water, 10 parts of high-efficiency water reducer, 2% of steel fiber volume mixing amount and 1% of nanofiber content by weight.
Through detection, the compressive strength of the 28d test piece at normal temperature is 103.4MPa, and the flexural strength is 12.6MPa. The compressive strength after 200 ℃ treatment is 76.3 MPa, and the test piece bursts after 400 ℃.
Comparative example 3
Compared with the embodiment 2, the preparation of the nanofiber alkali excitant in the step 3) is not carried out in the preparation process, the mixing procedure is that mineral powder, silica fume, reclaimed sand, a high-efficiency water reducer, water glass and sodium hydroxide are sequentially added, and after uniform stirring, the nano sisal fiber, the steel fiber, the water and the modified synthetic fiber are sequentially added, uniform stirring, ultrasonic vibration and the rest processes are the same.
Through detection, the compressive strength of the 28d test piece at normal temperature is 89.6MPa, and the flexural strength is 8.2MPa. The compressive strength after 200 ℃ treatment is 65.3 MPa, and the test piece is broken after 400 ℃.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limited thereto; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features can be replaced with equivalents; such modifications and substitutions do not depart from the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The preparation method of the fiber reinforced reclaimed sand high-temperature-resistant geopolymer is characterized by comprising the following steps of:
1) Weighing the raw materials according to the proportion,
2) The surface of the synthetic fiber is oiled for a plurality of times to obtain the modified synthetic fiber,
3) Soaking nanofiber in ethanol-sodium hydroxide solution for alkali washing, heating, adding appropriate amount of sodium chloroacetate for modification, cleaning, adding sodium hydroxide for uniform ultrasonic dispersion, adding sodium hydroxide for uniform stirring to obtain nanofiber alkali excitant,
4) Sequentially adding mineral powder, silica fume, reclaimed sand and high-efficiency water reducer into the nanofiber alkali excitant, stirring uniformly, sequentially adding steel fiber, water and modified synthetic fiber, stirring uniformly, performing ultrasonic vibration to obtain geopolymer slurry,
5) Shaping, vibrating, demoulding and curing the slurry to obtain the product,
the geopolymer consists of a main material and multi-scale fibers, wherein the main material consists of the following raw materials in parts by weight: 700-900 parts of mineral powder, 150-250 parts of silica fume, 1200-1400 parts of reclaimed sand, 170-250 parts of water glass, 28-45 parts of sodium hydroxide, 110-160 parts of water, 8-18 parts of high-efficiency water reducer, and a multi-scale fiber is composed of steel fibers, modified synthetic fibers and nano fibers, wherein the nano fibers are nano plant fibers, the steel fibers and the modified synthetic fibers are added according to a volume ratio of 1-2:1, the volume mixing amount of the two is 2-5% of that of a geopolymer material, and the adding amount of the nano fibers is 0.5-1wt% of the mass of a main material.
2. The method for preparing the fiber reinforced reclaimed sand high temperature resistant geopolymer according to claim 1, wherein the step 3) is heated to 70-90 ℃, and the washing is repeatedly performed for 4-8 times by deionized water.
3. The method for preparing the fiber reinforced reclaimed sand high temperature resistant geopolymer according to claim 1, wherein the rotation speed of the forced stirrer is not less than 120r/min in the step 3) and the step 4).
4. The method for preparing the fiber reinforced reclaimed sand high temperature resistant geopolymer according to claim 1, wherein the step 5) is performed by vibrating by a vibrating table, and the curing is performed by standard curing.
5. The method for preparing the fiber reinforced reclaimed sand high temperature resistant geopolymer according to claim 1, wherein the mineral powder is S95 grade mineral powder, and the silica fume has a particle size of 0.1-0.2 μm.
6. The method for producing a fiber-reinforced reclaimed sand high-temperature resistant geopolymer according to claim 1, wherein the reclaimed sand has a particle diameter of 0.045-2mm.
7. The method for preparing the fiber reinforced reclaimed sand high-temperature-resistant geopolymer according to claim 1, wherein the high-efficiency water reducer is a polycarboxylic acid high-efficiency water reducer, and the water reduction rate is more than 20%.
8. The method for preparing the fiber reinforced reclaimed sand high temperature resistant geopolymer according to claim 1, wherein the steel fiber is a linear copper plating steel fiber with the density of 7.9g/cm 3 The length is 15-20mm, the diameter is 0.2mm, and the tensile strength of the steel fiber is more than 2000MPa.
9. The method for preparing a polymer of fiber reinforced reclaimed sand with high temperature resistance according to claim 1, wherein the synthetic fiber has a length of 12-15mm and a diameter of 30 μm.
10. A fiber-reinforced reclaimed sand high-temperature-resistant geopolymer, characterized in that it is prepared by the preparation method according to any one of claims 1 to 9.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106220101A (en) * | 2016-08-12 | 2016-12-14 | 卓达新材料科技集团威海股份有限公司 | A kind of flyash base polymers grouting material and preparation method thereof |
| CN108546028A (en) * | 2018-07-20 | 2018-09-18 | 郑州大学 | A kind of Nano-meter SiO_22With the preparation method of PVA fiber reinforcement geopolymer mortars |
| CN110922493A (en) * | 2019-11-29 | 2020-03-27 | 济南圣泉集团股份有限公司 | Modified lignin nanocellulose, preparation method and application thereof, and modified mortar containing modified lignin nanocellulose |
| CN116283002A (en) * | 2023-02-25 | 2023-06-23 | 杭州钱神商品混凝土有限公司 | Concrete modifier, preparation method thereof and concrete |
| CN116874265A (en) * | 2023-09-06 | 2023-10-13 | 石家庄铁道大学 | High-ductility multi-scale fiber reinforced cement-based composite material and preparation method thereof |
| CN116903307A (en) * | 2023-06-26 | 2023-10-20 | 郑州大学 | Nano silicon dioxide/hybrid fiber reinforced geopolymer concrete and preparation method thereof |
-
2023
- 2023-11-29 CN CN202311607748.3A patent/CN117303810B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106220101A (en) * | 2016-08-12 | 2016-12-14 | 卓达新材料科技集团威海股份有限公司 | A kind of flyash base polymers grouting material and preparation method thereof |
| WO2018028225A1 (en) * | 2016-08-12 | 2018-02-15 | 卓达新材料科技集团威海股份有限公司 | Fly ash based geopolymer grouting material and preparation method therefor |
| CN108546028A (en) * | 2018-07-20 | 2018-09-18 | 郑州大学 | A kind of Nano-meter SiO_22With the preparation method of PVA fiber reinforcement geopolymer mortars |
| CN110922493A (en) * | 2019-11-29 | 2020-03-27 | 济南圣泉集团股份有限公司 | Modified lignin nanocellulose, preparation method and application thereof, and modified mortar containing modified lignin nanocellulose |
| CN116283002A (en) * | 2023-02-25 | 2023-06-23 | 杭州钱神商品混凝土有限公司 | Concrete modifier, preparation method thereof and concrete |
| CN116903307A (en) * | 2023-06-26 | 2023-10-20 | 郑州大学 | Nano silicon dioxide/hybrid fiber reinforced geopolymer concrete and preparation method thereof |
| CN116874265A (en) * | 2023-09-06 | 2023-10-13 | 石家庄铁道大学 | High-ductility multi-scale fiber reinforced cement-based composite material and preparation method thereof |
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