CN107352913B - A kind of super high strength high performance fiber concrete of C180 strength grade and preparation method thereof - Google Patents
A kind of super high strength high performance fiber concrete of C180 strength grade and preparation method thereof Download PDFInfo
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- CN107352913B CN107352913B CN201710703018.1A CN201710703018A CN107352913B CN 107352913 B CN107352913 B CN 107352913B CN 201710703018 A CN201710703018 A CN 201710703018A CN 107352913 B CN107352913 B CN 107352913B
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- 239000004567 concrete Substances 0.000 title claims abstract description 75
- 229920006253 high performance fiber Polymers 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 82
- 239000006185 dispersion Substances 0.000 claims abstract description 57
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 239000007788 liquid Substances 0.000 claims abstract description 46
- 239000002041 carbon nanotube Substances 0.000 claims abstract description 41
- 229910021393 carbon nanotube Inorganic materials 0.000 claims abstract description 41
- 239000002956 ash Substances 0.000 claims abstract description 38
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 30
- 235000007164 Oryza sativa Nutrition 0.000 claims abstract description 28
- 235000009566 rice Nutrition 0.000 claims abstract description 28
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 26
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 26
- 239000004568 cement Substances 0.000 claims abstract description 23
- 229920003043 Cellulose fiber Polymers 0.000 claims abstract description 22
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims abstract description 20
- 238000012986 modification Methods 0.000 claims abstract description 18
- 230000004048 modification Effects 0.000 claims abstract description 18
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000010703 silicon Substances 0.000 claims abstract description 13
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 13
- 239000010881 fly ash Substances 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 239000002131 composite material Substances 0.000 claims abstract description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 40
- 241000209094 Oryza Species 0.000 claims description 27
- 238000003756 stirring Methods 0.000 claims description 23
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 20
- 239000002048 multi walled nanotube Substances 0.000 claims description 20
- 239000007864 aqueous solution Substances 0.000 claims description 18
- 239000000243 solution Substances 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 17
- 230000000694 effects Effects 0.000 claims description 16
- 238000001723 curing Methods 0.000 claims description 15
- 239000004094 surface-active agent Substances 0.000 claims description 13
- 239000006004 Quartz sand Substances 0.000 claims description 10
- 239000004576 sand Substances 0.000 claims description 10
- 239000000377 silicon dioxide Substances 0.000 claims description 10
- 239000008367 deionised water Substances 0.000 claims description 9
- 229910021641 deionized water Inorganic materials 0.000 claims description 9
- 235000019353 potassium silicate Nutrition 0.000 claims description 9
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 9
- 125000000524 functional group Chemical group 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 7
- 229920005646 polycarboxylate Polymers 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 239000003643 water by type Substances 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 4
- 239000010903 husk Substances 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 239000004575 stone Substances 0.000 claims description 4
- 238000002604 ultrasonography Methods 0.000 claims description 4
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 claims description 3
- 229910001018 Cast iron Inorganic materials 0.000 claims description 3
- 235000002918 Fraxinus excelsior Nutrition 0.000 claims description 3
- 239000011398 Portland cement Substances 0.000 claims description 3
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 3
- 239000013504 Triton X-100 Substances 0.000 claims description 3
- 229920004890 Triton X-100 Polymers 0.000 claims description 3
- 150000001336 alkenes Chemical class 0.000 claims description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical class [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 3
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 3
- 239000003245 coal Substances 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 239000011435 rock Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000004062 sedimentation Methods 0.000 claims description 3
- 239000012265 solid product Substances 0.000 claims description 3
- 239000006228 supernatant Substances 0.000 claims description 3
- 239000000706 filtrate Substances 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- OUUQCZGPVNCOIJ-UHFFFAOYSA-N hydroperoxyl Chemical compound O[O] OUUQCZGPVNCOIJ-UHFFFAOYSA-N 0.000 claims 2
- 235000013339 cereals Nutrition 0.000 claims 1
- 239000012528 membrane Substances 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 12
- 229910052742 iron Inorganic materials 0.000 abstract description 6
- 230000006835 compression Effects 0.000 abstract description 4
- 238000007906 compression Methods 0.000 abstract description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 3
- 239000010959 steel Substances 0.000 abstract description 3
- 230000007812 deficiency Effects 0.000 abstract description 2
- 240000007594 Oryza sativa Species 0.000 abstract 1
- 239000011150 reinforced concrete Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 13
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 12
- 239000001301 oxygen Substances 0.000 description 12
- 229910052760 oxygen Inorganic materials 0.000 description 12
- 238000012423 maintenance Methods 0.000 description 10
- 230000009471 action Effects 0.000 description 6
- 229910002804 graphite Inorganic materials 0.000 description 6
- 239000010439 graphite Substances 0.000 description 6
- -1 graphite alkene Chemical class 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000005119 centrifugation Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 235000011121 sodium hydroxide Nutrition 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 239000002585 base Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000004035 construction material Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 230000010148 water-pollination Effects 0.000 description 3
- 229920001410 Microfiber Polymers 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000001627 detrimental effect Effects 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 239000004574 high-performance concrete Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000003658 microfiber Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 101710198474 Spike protein Proteins 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000002154 agricultural waste Substances 0.000 description 1
- 230000002742 anti-folding effect Effects 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000002242 deionisation method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000002500 effect on skin Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000037427 ion transport Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000002121 nanofiber Substances 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229950000845 politef Drugs 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 230000005476 size effect Effects 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 229910001948 sodium oxide Inorganic materials 0.000 description 1
- JBJWASZNUJCEKT-UHFFFAOYSA-M sodium;hydroxide;hydrate Chemical compound O.[OH-].[Na+] JBJWASZNUJCEKT-UHFFFAOYSA-M 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- CCEKAJIANROZEO-UHFFFAOYSA-N sulfluramid Chemical group CCNS(=O)(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F CCEKAJIANROZEO-UHFFFAOYSA-N 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- 238000009210 therapy by ultrasound Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- 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
- C04B28/02—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 hydraulic cements other than calcium sulfates
-
- 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
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/022—Carbon
- C04B14/026—Carbon of particular shape, e.g. nanotubes
-
- 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
- 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
-
- 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
- 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
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Nanotechnology (AREA)
- Civil Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses super high strength high performance fiber concretes of a kind of C180 strength grade and preparation method thereof, the mass parts composition of the concrete is as follows: 505 parts of cement, 70 parts of water, 1000 parts of rubble, 770 parts of fine aggregate, 70 parts of flyash, 78 parts of rice hull ash, 118 parts of silicon ash, 15 parts of water-reducing agent, 10 parts of exciting agent, 1.7 parts of cellulose fibre, 43 parts of hydroxyl modification carbon nano tube dispersion liquid, 45 parts of graphene oxide dispersion, 2.7 parts of defoaming agent.The concrete of preparation toughness with higher and excellent endurance quality, the adhesion strength with higher between fashioned iron, compression strength reaches 188.63MPa, flexural strength reaches 36.44MPa, split tensile strength reaches 15.38MPa, adhesion strength between fashioned iron reaches 7.68MPa, and chloride ion resistance grade reaches VI grade.For can effectively play the cooperative work performance between fashioned iron and concrete in reinforced concrete composite structure, the deficiency that bond between steel and concrete performance is poor, is unable to give full play the respective mechanical property of the two is made up.
Description
Technical field
It is that one kind mixes rice hull ash, cellulose fibre, modified carbon nano-tube and oxygen the invention belongs to New Building Materials field
High intensity, high tenacity and the high durability concrete of graphite alkene, and in particular to a kind of C180 strength grade with high tenacity
Super high strength high performance fiber concrete and preparation method thereof.
Background technique
The tensile strength of normal concrete and cement-based material is low, poor toughness, in hardening process or under external loads effect
A large amount of microcracks can be generated, Cl is made-、SO4 2-Equal harmful ions and CO2Equal pernicious gases invade inside concrete, accelerate concrete
The erosion of structure seriously affects the durability of concrete or cement-base composite material structure, reduces structure service life.
Carbon nanotube is a kind of one dimension fibre material with Nano grade diameter and micron level length, and draw ratio is high
Up to 100-1000, elasticity modulus (can reach 1TPa or so) is about 5 times of steel and density is the 1/6 of steel；Carbon is received
The tensile strength of mitron then can reach 60-150GPa, and compressive strength 100-170GPa, breaking strain is in 30-50% range.Cause
Its excellent Physical and mechanical properties makes carbon nanotube become ideal composite material reinforcing fiber.But due to carbon nanotube
Surface is completely smooth, defect is few, lacks active group, and the relative solubility in water and various solution or composite material is lower,
In addition between carbon nanotube there are at biggish Van der Waals force, surface exist very big surface free energy, therefore carbon nanotube it
Between spontaneous reunion or winding easily occurs, it is evenly dispersed in certain polymer to seriously affect carbon nanotube.The present invention makes
Multi-walled carbon nanotube is dispersed and is ultrasonically treated with surfactant, is tied not cutting off carbon nanotube and not destroying its surface
On the basis of structure, the modified multiwalled carbon nanotube dispersion liquid for capableing of stable dispersion in water is obtained, to can be used to mix
In solidifying soil, its microfibre toughening effect is given full play to.
And graphene is also intensity and the highest crystal structure of hardness in current material, tensile strength and elasticity modulus difference
It can reach 125GPa and 1.1TPa.Single-layer graphene thickness is only about 0.35nm, is most thin by two in presently found nature
Material is tieed up, specific surface area with higher can be well in conjunction with polymer.But due to being sp2 hydridization knot in graphene face
Structure causes mutually to adsorb between nanoparticle there are very strong molecular attraction, causes graphene to reunite together, is unable to stable dispersion
In the polymer and its effect is played, or even intrinsic silicon can be caused defect occur.And the graphene monolithic Jing Guo oxidation processes
Surface introduces the oxygen-containing functional groups such as many hydroxyls, carboxyl, can it is evenly dispersed in water, but graphene oxide is in alkali
It is easy to happen flocculation under the conditions of property, it is unfavorable that this disperses graphene oxide in cement, or even can cause the intensity of concrete
Loss.The present invention by add dispersing agent be prepared for can in cement stable dispersion graphene oxide dispersion, can
It is enough in concrete, improves the comprehensive performance of concrete.
In order to overcome normal concrete and high performance concrete brittleness and existing fiber concrete and cement base it is compound
The shortcomings that material, using the cellulose fibre with water storage function and toughening effect and the rice hull ash with ultrafine micropore structure
(rice hull ash with porous structure can absorb moisture), " the interior maintenance action " of two kinds of materials can promote the aquation of cementitious material
Process；In addition, by the way that modified carbon nano-tube and graphene oxide both components are added in concrete, to improve concrete
Toughness, and make cementitious material in hydration process aquation more sufficiently, improve the crystal shape or even concrete of hydrated product
The compactness extent of internal structure is finally reached the intensity and endurance quality for improving concrete, and promotes its toughness, plasticity and tension
The target of intensity.
Summary of the invention
The object of the present invention is to provide a kind of super high strength high performance fiber concrete of C180 strength grade and its preparation sides
Method, novelty of the invention, which ties up in concrete, to be mixed with cellulose fibre with toughening and interior maintenance action, has interior support
A kind of carbon-free rice hull ash of novel active mineral admixture of shield effect, and the modification multi wall with toughening and nano-filled effect
Carbon nanotube and graphene oxide.Synergistic effect between each component can promote cementitious material aquation more abundant, improve mixed
Microcosmic composition inside solidifying soil, reduces detrimental voids quantity, keeps concrete inner structure more closely knit, finally prepares with super
High intensity, high tenacity, high-durability, high volume stability novel high-performance fiber concrete material.
To achieve the above object, technical solution disclosed by the invention is:
A kind of super high strength high performance fiber concrete of C180 strength grade, the raw material including following mass fractions:
505 parts of cement, 70 parts of water, 1000 parts of rubble, 770 parts of fine aggregate, 70 parts of flyash, 78 parts of rice hull ash, silicon ash 118
Part, 15 parts of water-reducing agent, 10 parts of exciting agent, 1.7 parts of cellulose fibre, 43 parts of hydroxyl modification carbon nano tube dispersion liquid, graphite oxide
45 parts of alkene dispersion liquid, 2.7 parts of defoaming agent.
The cement is I 62.5R portland cement of P, good with poly carboxylic acid series water reducer compatibility.
The fine aggregate uses mass ratio for the good high grade quartz sand of the scleroid river sand and gradation of 8:2, river sand
Fineness modulus is 2.8-3.2, and dioxide-containing silica is not less than 98% in quartz sand, partial size 0.3-0.6mm, density 2.62g/
cm3。
Rubble selection gradation is good, fine and close hard, shaggy basaltic broken stone, by the 5- of continuous size fraction
The rubble of 10mm, 10-16mm are used in mixed way according to the mass ratio of 7:3, and parent rock strength is not less than 250MPa, and maximum particle diameter is not
More than 16mm.
The flyash is not more than 95% using high-quality I grade special fine powdered coal of power plant, water demand ratio, and specific surface area should be greater than
600m2/kg。
The mass percent of silica is not less than 93% in the silicon ash, and pozzolanic activity index is greater than 95%, averagely
0.1 μm -0.3 μm of partial size, specific surface area is greater than 15m2/g。
The water-reducing agent is polycarboxylate high performance water-reducing agent, and solid content 20%, pH value 7-8, water-reducing rate is 30%
More than, 7d, 28d compressive strength rate are not less than 180%；
The defoaming agent uses U.S.'s Hexion AXILAT DF6352DD defoaming agent.
The rice hull ash be by rice husk 650-800 DEG C at a temperature of through burning, using ball mill grinding 30-40min
Ash purple powder obtained, dioxide-containing silica 93.6%, partial size are 5-25 μm, and specific surface area is greater than 70m2/g。
The exciting agent is Organic-inorganic composite exciting agent, is compounded according to the raw material of following mass percent meters:
98% waterglass, 2% triethanolamine；
The modulus of the water glass solution is 1.2, is molten for 3.4 waterglass by industrial sodium hydroxide and commercially available modulus
What liquid was formulated.
The cellulose fibre is UF500 cellulose fibre, and length 2-3mm, diameter is 15-20 μm, tensile strength >=
900MPa, elasticity modulus >=8.5GPa, fracture elongation reach 10%, specific gravity 1.1g/cm3, there is good hydrophily, compared with
High bond stress and acid-proof alkaline.
The carbon nano tube dispersion liquid is hydroxyl modification carbon nano tube dispersion liquid, is successively to pass through alkali by multi-walled carbon nanotube
Hydro-thermal reaction under the conditions of property obtains hydroxyl modification multi-wall carbon nano-tube pipe powder, then with surfactant and auxiliary agent in deionization
It is obtained after decentralized processing in water.
The hydroxyl modification carbon nano tube dispersion liquid the preparation method is as follows:
1) compound concentration is the NaOH aqueous solution of 2.0M, weighs the NaOH water that 100 parts of preparations are added in 2 parts of multi-walled carbon nanotubes
In solution, it is ultrasonically treated 5min；Carbon nano tube dispersion liquid is poured into autoclave, 180 DEG C of reaction 120min after sealing；It is cold afterwards
But to room temperature, centrifuge separation is added deionized water and dilutes and wash, removes clear liquid；Ultrasound 10min again, stirring, vinylidene chloride filter
Film filtering, gained solid product are washed to filtrate as neutrality；Dry 12h, obtains the oxygen-containing functional groups such as surface hydroxyl at 40 DEG C
Modified multiwalled carbon nanotube；
2) modified multiwalled carbon nanotube, the surface-active of the oxygen-containing functional groups such as the surface hydroxyl prepared in step 1) are weighed
0.5 part of agent, 0.1 part of defoaming agent and 98 parts of deionized water, surfactant, defoaming agent and modified carbon nano-tube are successively distributed to
In deionized water, stirring soaks carbon nanotube completely by aqueous surfactant solution；It is ultrasonically treated 30min；Later to dispersion
Liquid carries out centrifugal sedimentation；
3) supernatant liquid is crossed into 300 mesh filter clothes, obtains carbon nano tube dispersion liquid 1；The carbon nanotube that bottom precipitation is reunited
It carries out ultrasound 60min again according to step 2), obtains carbon nano tube dispersion liquid 2, hydroxyl modification in carbon nano tube dispersion liquid 1 and 2
Multi-walled carbon nanotube uniform and stable can disperse in water.
The multi-walled carbon nanotube is averaged caliber as 40-50nm, and length is 10-20 μm, purity >=98%.
The surfactant is Triton X-100, and pH=7.0,63 DEG C of cloud point, be a kind of non-ionic table
Face activating agent；The defoaming agent is U.S.'s Hexion AXILAT DF6352DD defoaming agent.
The graphene oxide dispersion is obtained by following methods:
(1) 100 parts of deionized waters are added in 1 part of graphene oxide powder to obtain using ultrasonic machine ultrasonic disperse 30min
To finely dispersed graphene oxide dispersion；
(2) 0.1 part of water-reducing agent is added in 50 parts of deionized waters, is stirred evenly, the oxygen of step (1) preparation is then added
Graphite alkene dispersion liquid stirs 90s using special-purpose stirring machine, finally obtains graphene oxide that can be evenly dispersed in cement
Dispersion liquid.
The graphene oxide is powdered, purity >=98%, and 10 μm -20 μm of diameter, surface has a large amount of oxygen-containing
Group, in water dispersion degree with higher；
The water-reducing agent is polycarboxylate high performance water-reducing agent, solid content 20%, pH value 7.
The invention also discloses a kind of preparation methods of the super high strength high performance fiber concrete of C180 strength grade, including
Following steps:
1) 10 parts of exciting agents of mass fraction and 2.7 parts of defoaming agents are dissolved in 25% water of total Water, is denoted as aqueous solution
1,15 parts of water-reducing agents, 43 parts of hydroxyl modification carbon nano tube dispersion liquids and 45 parts of graphene oxide dispersions are added to 50% water
In solution, it is denoted as aqueous solution 2；
2) weighing 770 parts in mass ratio is the river sand and quartz sand, 1000 parts of rubbles and 1.7 parts of cellulose fibers of 8:2 configuration
Dimension is added sequentially in blender, uniform stirring 2-3min；
3) 505 parts of cement, 70 parts of flyash, 78 parts of rice hull ash, 118 parts of silicon ashes then, are sequentially added, then will be in step 1)
The aqueous solution 1 of preparation is added in blender, uniform stirring 2-3min；
4) then to the aqueous solution 2 being added in blender in step 1), uniform stirring 3-4min；
5) mobility for finally observing mixture, continuously adds the water of total Water remaining 25%, uniform stirring 3-5min,
It discharges to get prepared concrete mix is arrived；And it forms, conserve.
Concrete uses steam curing in the preparation method, forms as follows with maintenance process:
Concrete batching system is poured into cast iron die molding, jolt ramming, temperature be 20 DEG C ± 2 DEG C, relative humidity >=
1d is stood in 95% standard curing room, demoulding moves to concrete in High Temperature Curing equipment, and (heating rate is for heating heating
10 DEG C per hour) to 90 DEG C, thermostatic curing 2d, after cooling (cooling rate is 10 DEG C per hour) to room temperature, in standard curing room
Pond (being saturated limewater solution in pond, solution temperature is 20 DEG C ± 2 DEG C) in maintenance to required age.
The present invention use for the first time cellulose fibre, rice hull ash, modified carbon nano-tube, graphene oxide, cement, flyash,
Quartz sand, river sand, rubble, chemical admixture (including water-reducing agent, exciting agent, defoaming agent), water are prepared for a kind of with high volume
Stability, high tenacity, high-durability C180 strength grade super high strength high performance fiber concrete, overcome normal concrete
The deficiencies of brittleness is big, easy to crack, durability is poor.
The beneficial effects of the present invention are:
1) cellulose fibre used in the present invention has natural hydrophily and high-elastic model point, can effectively inhibit mixed
The formation and development of microcrack caused by the factors such as solidifying soil plastic shrinkage, drying shrinkage, temperature change；Cellulose fiber surface has very
Strong bond stress has good cementitiousness with cement matrix, prevents spike protein gene in concrete cracking, prevent crack
Further development, and the fracture of fiber can increase the energy dissipation capacity of concrete；In addition, cellulose fibre has unique fiber
Cavity structure and huge specific surface area, cavity structure can store partial moisture, play " interior maintenance action ", promote coagulation
The heat evolution velocity of soil.Therefore, it is resistance to can be improved mechanical property and cracking resistance, impervious and freeze thawing resistance of concrete etc. for cellulose fibre
Long performance.
2) silica for containing 90% or more in the present invention by the rice hull ash that combusting rice hull, grinding obtain, has higher
Pozzolanic activity, the particle of rice hull ash is tiny (particle be 5-25 μm), the porous and net road structure inside rice hull ash particle
Huge specific surface area is made it have, 70m can be reached2/ g or more.Therefore, incorporation rice hull ash can make gelling material particles more
Uniformly, gradation is good, can play filling role, increases the cohesiveness of concrete；Secondly as a large amount of inside rice hull ash
Microcellular structure can water storage, play " interior maintenance action "；In addition, since rice hull ash has pozzolanic activity similar with silicon ash,
It can replace the Ca (OH) in partially or completely silicon ash, with concrete system2Reaction generates fine and close hard aquation sulphur aluminic acid
Calcium improves concrete flexural strength, compression strength, tensile splitting strength, endurance quality；Finally, rice hull ash is as agricultural residue,
It is used as construction material replacing partial cement after being processed to, can reduce since rice husk burns and the CO in cement production process2Row
High-volume, and then concrete cost is reduced, realizes the recycling of agricultural wastes, reaches energy-saving and environment-friendly purpose.
3) present invention is dispersed and is ultrasonically treated to multi-walled carbon nanotube using surfactant, is not cutting off carbon nanometer
It pipe and does not destroy on the basis of its surface texture, obtains the modified multiwalled carbon nanotube dispersion liquid for capableing of stable dispersion in water.
Due to the nanometer size effect and skin effect of carbon nanotube, bridge linking effect is played as nano-scale fiber, control nanoscale is split
The emergence and development of seam increase the intensity etc. of concrete base material；In addition, the micro-packing effect of carbon nanotube, can fill
Most of detrimental voids of inside concrete increase the compactness of concrete, improve the various aspects such as toughness of concrete, endurance quality
Performance.
4) present invention by addition dispersing agent be prepared for can in cement stable dispersion graphene oxide dispersion.Oxygen
On the one hand graphite alkene plays the role of nano-filled, on the other hand the oxygen-containing functional group on its surface can be with hydrolysis product of cement hydrogen
Calcium oxide, entringite, hydrated calcium silicate etc. further react, and change the shape of hydrated cementitious crystalline product, enhance cement matrix
Toughness, make concrete structure anti-folding with higher with compression strength etc., and enhance the caking property between concrete and fashioned iron
Energy.
There is the rice hull ash of volcano ash effect, physics filing effect and " interior maintenance action " by adding, there is toughening to make
With the cellulose fibre with " interior maintenance action ", and modified carbon nano-tube and the oxidation of microfibre filled toughening effect can be played
Graphene etc., collaboration improves concrete performance between each component, is configured to a kind of resistance to high intensity, high volume stability, height
The super high strength high performance fiber concrete of the C180 strength grade of long property and higher toughness.
Above-mentioned measure can effectively improve compression strength, toughness, deformability, the endurance quality etc. of concrete, and enhance
Adhesion strength and cooperative transformation ability between concrete and fashioned iron.The C180 intensity that the method is prepared through the invention
The superhigh intensity high performance concrete of grade, 28d age cubic compressive strength reach 188.63MPa, and flexural strength reaches
36.44MPa, split tensile strength reach 15.38MPa, and the adhesion strength between fashioned iron reaches 7.68MPa, chloride ion resistance grade
Reach VI grade of (28d unstable state chloride ion transport coefficient DRCM< 10 × 10-14m2/s).The present invention, which has prepared, has superelevation strong
Degree, high volume stability, high-durability and high tenacity high-performance fiber concrete, raw material are easy to get, preparation process is simple,
The requirement for meeting sustainable development and the application of Modern Green construction material and popularization is that a kind of environmentally protective novel high-performance is fine
Tie up concrete material.
Specific embodiment
With reference to embodiment, the present invention is described in further detail using embodiment, so that advantage of the invention is easier to
In the protection scope for being readily appreciated by one skilled in the art, but being not intended to restrict the invention.
The preparation method of the super high strength high performance fiber concrete of C180 strength grade of the present invention, includes the following steps:
1) 10 parts of exciting agents of mass fraction and 2.7 parts of defoaming agents are dissolved in 25% water of total Water, is denoted as aqueous solution
1,15 parts of water-reducing agents, 43 parts of hydroxyl modification carbon nano tube dispersion liquids and 45 parts of graphene oxide dispersions are added to 50% water
In solution, it is denoted as aqueous solution 2；
2) weighing 770 parts in mass ratio is the river sand and quartz sand, 1000 parts of rubbles and 1.7 parts of cellulose fibers of 8:2 configuration
Dimension is added sequentially in blender, uniform stirring 2-3min；
3) 505 parts of cement, 70 parts of flyash, 78 parts of rice hull ash, 118 parts of silicon ashes then, are sequentially added, then will be in step 1)
The aqueous solution 1 of preparation is added in blender, uniform stirring 2-3min；
4) then to the aqueous solution 2 being added in blender in step 1), uniform stirring 3-4min；
5) mobility for finally observing mixture, continuously adds the water of total Water remaining 25%, uniform stirring 3-5min,
It discharges to get prepared concrete mix is arrived；And it forms, conserve.
Concrete uses steam curing in preparation method used, forms as follows with maintenance process:
Concrete batching system is poured into cast iron die molding, jolt ramming, temperature be 20 ± 2 DEG C, relative humidity >=
1d is stood in 95% standard curing room, demoulding moves to concrete in High Temperature Curing equipment, and (heating rate is for heating heating
10 DEG C per hour) to 90 DEG C, thermostatic curing 2d, after cooling (cooling rate is 10 DEG C per hour) to room temperature, in standard curing room
Pond (being saturated limewater solution in pond, solution temperature is 20 ± 2 DEG C) in maintenance to required age.
Cement used is I 62.5R portland cement of P, good with poly carboxylic acid series water reducer compatibility.
Fine aggregate used uses mass ratio for the good high grade quartz sand of the scleroid river sand and gradation of 8:2, river sand
Fineness modulus is 2.8-3.2, and dioxide-containing silica is not less than 98% in quartz sand, partial size 0.3mm-0.6mm, and density is
2.62g/cm3。
Rubble used selection gradation is good, fine and close hard, shaggy basaltic broken stone, by the 5- of continuous size fraction
The rubble of 10mm, 10-16mm are used in mixed way according to the mass ratio of 7:3, and parent rock strength is not less than 250MPa, and maximum particle diameter is not
More than 16mm.
Flyash used is not more than 95% using high-quality I grade special fine powdered coal of power plant, water demand ratio, and specific surface area should be greater than
600m2/kg。
The mass percent of silica is not less than 93% in silicon ash used, and pozzolanic activity index is greater than 95%, averagely
0.1 μm -0.3 μm of partial size, specific surface area is greater than 15m2/g。
Water-reducing agent used is polycarboxylate high performance water-reducing agent, and solid content 20%, pH value 7-8, water-reducing rate is 30%
More than, 7d, 28d compressive strength rate are not less than 180%.
The defoaming agent uses U.S.'s Hexion AXILAT DF6352DD defoaming agent.
Rice hull ash used be by rice husk 650-800 DEG C at a temperature of through burning, using ball mill grinding 30-40min
Ash purple powder obtained, dioxide-containing silica 93.6%, partial size are 5-25 μm, and specific surface area is greater than 70m2/g。
Exciting agent used is Organic-inorganic composite exciting agent, is compounded according to the raw material of following mass percent meters:
98% waterglass, 2% triethanolamine；
Wherein, the modulus of water glass solution is 1.2, is the waterglass for being 3.4 by industrial sodium hydroxide and commercially available modulus
Solution is formulated.
Cellulose fibre used is the UF500 cellulose fibre of U.S. Burkeye company research and development, length 2-3mm, diameter
It is 15-20 μm, tensile strength >=900MPa, elasticity modulus >=8.5GPa, fracture elongation reaches 10%, specific gravity 1.1g/
cm3, there is good hydrophily, higher bond stress and acid-proof alkaline.
Hydroxyl modification carbon nano tube dispersion liquid used is as made from following methods:
1) compound concentration is the sodium hydrate aqueous solution of 2.0M, weighs the hydrogen that 100 parts of preparations are added in 2 parts of multi-walled carbon nanotubes
In aqueous solution of sodium oxide, it is ultrasonically treated 5min；Carbon nano tube dispersion liquid is poured into the height of the stainless steel with politef liner
Press reaction kettle, 180 DEG C of reaction 120min after sealing；After be cooled to room temperature (centrifugation rate 2000r/ be centrifuged
Min, centrifugation time 30min), deionized water is then added and dilutes and washs, removing clear liquid, 2 times repeatedly；It is then ultrasonic again
10min, the vinylidene chloride membrane filtration for being 0.2 μm by diameter after stirring, gained solid product are cleaned with deionized water to filter
Liquid pH=7；Dry 12h at 40 DEG C, obtains the modification multi-wall carbon nano-tube of the oxygen-containing functional groups such as surface hydroxyl in vacuum drying oven
Pipe.
2) modified multiwalled carbon nanotube, the surface-active of the oxygen-containing functional groups such as the surface hydroxyl prepared in step 1) are weighed
0.5 part of agent, 0.1 part of defoaming agent and 98 parts of deionized water, surfactant, defoaming agent and modified carbon nano-tube are successively distributed to
In deionized water, stirring soaks carbon nanotube completely by aqueous surfactant solution；It is ultrasonically treated 30min；Later to dispersion
Liquid carries out centrifugal sedimentation (centrifugation rate 2000r/min, centrifugation time 30min).
3) after being centrifuged, supernatant liquid is crossed into 300 mesh filter clothes, obtains carbon nano tube dispersion liquid 1；(i.e. by bottom precipitation
The carbon nanotube of reunion) according to step 2) ultrasonic treatment 60min is carried out again, obtain carbon nano tube dispersion liquid 2, carbon nanotube point
Hydroxyl modification multi-walled carbon nanotube uniform and stable can disperse in water in dispersion liquid 1 and 2.
Wherein, multi-walled carbon nanotube is averaged caliber as 40-50nm, and length is 10-20 μm, purity >=98%；Surface-active
Agent is Triton X-100, pH=7.0,63 DEG C of cloud point；Defoaming agent is U.S.'s Hexion AXILAT DF6352DD defoaming
Agent.
Graphene oxide dispersion used is obtained by following methods:
(1) 100 parts of deionized waters are added in 1 part of graphene oxide powder to obtain using ultrasonic machine ultrasonic disperse 30min
To finely dispersed graphene oxide dispersion；
(2) 0.1 part of water-reducing agent is added in 50 parts of deionized waters, is stirred evenly, the oxygen of step (1) preparation is then added
Graphite alkene dispersion liquid stirs 90s using special-purpose stirring machine, finally obtains graphene oxide that can be evenly dispersed in cement
Dispersion liquid.
Wherein, graphene oxide used is powdered, purity >=98%, and 10 μm -20 μm of diameter, surface has a large amount of
Oxygen-containing group, in water dispersion degree with higher；Water-reducing agent used is polycarboxylate high performance water-reducing agent, and solid content is
20%, pH value 7.
Specific embodiment is given below to further illustrate preparation method of the present invention.
The match ratio of the super high strength high performance fiber concrete of C180 strength grade described in the present embodiment (presses each component quality
Number meter) it is as follows:
505 parts of cement, 70 parts of water, 1000 parts of rubble, 770 parts of fine aggregate, 70 parts of flyash, 78 parts of rice hull ash, silicon ash 118
Part, 15 parts of water-reducing agent, 10 parts of exciting agent, 1.7 parts of cellulose fibre, 43 parts of hydroxyl modification carbon nano tube dispersion liquid, graphite oxide
45 parts of alkene dispersion liquid, 2.7 parts of defoaming agent.
The performance test results of the super high strength high performance fiber concrete of C180 strength grade described in the present embodiment such as 2 institute of table
Show.
The super high strength high performance fiber concrete basic performance of 1 C180 strength grade of table
As can be seen from the above Table 1, the super high strength high performance fiber concrete of C180 strength grade of the present invention is a kind of property
The good concrete of energy, can be used as Modern Green construction material application.
The above description is only an embodiment of the present invention, be in conjunction with specific optimal enforcement mode to it is of the invention it is further in detail
It describes in detail bright, cannot therefore limit the scope of the invention, those skill in the art related utilize present disclosure
With method, or under the premise of not departing from present inventive concept, simple change or replacement is made, all should be considered as of the invention
In protection scope.Protection scope of the present invention should be subject to the protection scope that disclosed claim defines.
Claims (8)
1. a kind of super high strength high performance fiber concrete of C180 strength grade, which is characterized in that fiber concrete includes following
The raw material of mass fraction:
505 parts of cement, 70 parts of water, 1000 parts of rubble, 770 parts of fine aggregate, 70 parts of flyash, 78 parts of rice hull ash, 118 parts of silicon ash,
15 parts of water-reducing agent, 10 parts of exciting agent, 1.7 parts of cellulose fibre, 43 parts of hydroxyl modification carbon nano tube dispersion liquid, graphene oxide point
45 parts of dispersion liquid, 2.7 parts of defoaming agent；
The rice hull ash be by rice husk 650-800 DEG C at a temperature of by burning, being made using ball mill grinding 30-40min
Grey purple powder, dioxide-containing silica 93.6%, partial size be 5-25 μm, specific surface area be greater than 70m2/g；
The cellulose fibre is UF500 cellulose fibre, and length 2-3mm, diameter is 15-20 μm, tensile strength >=
900MPa, elasticity modulus >=8.5GPa, fracture elongation reach 10%, specific gravity 1.1g/cm3；
The graphene oxide be powdered, purity >=98%, 10 μm -20 μm of diameter.
2. the super high strength high performance fiber concrete of C180 strength grade according to claim 1, which is characterized in that described
Cement is I 62.5R portland cement of P, good with poly carboxylic acid series water reducer compatibility；
The fine aggregate uses mass ratio for the good high grade quartz sand of the scleroid river sand and gradation of 8:2, river sand fineness
Modulus is 2.8-3.2, and dioxide-containing silica is not less than 98% in quartz sand, partial size 0.3-0.6mm, density 2.62g/cm3；
Rubble selection gradation is good, fine and close hard, shaggy basaltic broken stone, by 5-10mm, 10- of continuous size fraction
The rubble of 16mm is used in mixed way according to the mass ratio of 7:3, and parent rock strength is not less than 250MPa, and maximum particle diameter is no more than
16mm；
The flyash is not more than 95% using high-quality I grade special fine powdered coal of power plant, water demand ratio, and specific surface area should be greater than
600m2/kg；
The mass percent of silica is not less than 93% in the silicon ash, and pozzolanic activity index is greater than 95%, average grain diameter
0.1-0.3 μm, specific surface area is greater than 15m2/g；
The water-reducing agent is polycarboxylate high performance water-reducing agent, solid content 20%, pH value 7-8, water-reducing rate 30% or more,
7d, 28d compressive strength rate are not less than 180%；
The defoaming agent uses U.S.'s Hexion AXILAT DF6352DD defoaming agent.
3. the super high strength high performance fiber concrete of C180 strength grade according to claim 1, which is characterized in that described
Exciting agent is Organic-inorganic composite exciting agent, is compounded according to the raw material of following mass percent meters:
98% waterglass, 2% triethanolamine；
The modulus of the water glass solution is 1.2, is that the water glass solution for being 3.4 by industrial sodium hydroxide and commercially available modulus is matched
It makes.
4. the super high strength high performance fiber concrete of C180 strength grade according to claim 1, which is characterized in that described
Hydroxyl modification carbon nano tube dispersion liquid is as made from following methods:
1) compound concentration is the NaOH aqueous solution of 2.0M, weighs the NaOH aqueous solution that 100 parts of preparations are added in 2 parts of multi-walled carbon nanotubes
In, it is ultrasonically treated 5min；Carbon nano tube dispersion liquid is poured into autoclave, 180 DEG C of reaction 120min after sealing；After be cooled to
Room temperature, centrifuge separation are added deionized water and dilute and wash, remove clear liquid；Ultrasound 10min again, stirring, vinylidene chloride filter membrane mistake
Filter, gained solid product are washed to filtrate as neutrality；Dry 12h, obtains the modification of surface hydroxyl oxygen-containing functional group at 40 DEG C
Multi-walled carbon nanotube；
2) modified multiwalled carbon nanotube, the surfactant 0.5 of the surface hydroxyl oxygen-containing functional group prepared in step 1) are weighed
Part, 0.1 part of defoaming agent and 98 parts of deionized water, by surfactant, defoaming agent and modified carbon nano-tube be successively distributed to from
In sub- water, stirring soaks carbon nanotube completely by aqueous surfactant solution；It is ultrasonically treated 30min；Later to dispersion liquid into
Row centrifugal sedimentation；
3) supernatant liquid is crossed into 300 mesh filter clothes, obtains carbon nano tube dispersion liquid 1；By bottom precipitation reunite carbon nanotube according to
Step 2) carries out ultrasound 60min again, obtains carbon nano tube dispersion liquid 2, hydroxyl modification multi wall in carbon nano tube dispersion liquid 1 and 2
Carbon nanotube uniform and stable can disperse in water.
5. the super high strength high performance fiber concrete of C180 strength grade according to claim 4, which is characterized in that described
Multi-walled carbon nanotube is averaged caliber as 40-50nm, and length is 10-20 μm, purity >=98%；
The surfactant be Triton X-100, pH=7.0,63 DEG C of cloud point；
The defoaming agent is U.S.'s Hexion AXILAT DF6352DD defoaming agent.
6. the super high strength high performance fiber concrete of C180 strength grade according to claim 1, which is characterized in that described
Graphene oxide dispersion is obtained by following methods:
(1) 100 parts of deionized waters are added in 1 part of graphene oxide powder to be divided using ultrasonic machine ultrasonic disperse 30min
Dissipate uniform graphene oxide dispersion；
(2) 0.1 part of water-reducing agent is added in 50 parts of deionized waters, is stirred evenly, the oxidation stone of step (1) preparation is then added
Black alkene dispersion liquid stirs 90s, obtains graphene oxide dispersion；
The water-reducing agent is polycarboxylate high performance water-reducing agent, solid content 20%, pH value 7.
7. a kind of preparation side of the super high strength high performance fiber concrete of C180 strength grade described in any one of claims 1-6
Method, which comprises the steps of:
1) 10 parts of exciting agents of mass fraction and 2.7 parts of defoaming agents are dissolved in 25% water of total Water, is denoted as aqueous solution 1, it will
15 parts of water-reducing agents, 43 parts of hydroxyl modification carbon nano tube dispersion liquids and 45 parts of graphene oxide dispersions are added to 50% aqueous solution
In, it is denoted as aqueous solution 2；
2) weigh 770 parts in mass ratio for 8:2 configuration river sand and quartz sand, 1000 parts of rubbles and 1.7 parts of cellulose fibres according to
It is secondary to be added in blender, uniform stirring 2-3min；
3) 505 parts of cement, 70 parts of flyash, 78 parts of rice hull ash, 118 parts of silicon ashes then, are sequentially added, then will be prepared in step 1)
Aqueous solution 1 be added in blender, uniform stirring 2-3min；
4) then to the aqueous solution 2 being added in blender in step 1), uniform stirring 3-4min；
5) mobility for finally observing mixture, continuously adds the water of total Water remaining 25%, uniform stirring 3-5min, out
Expect to get prepared concrete mix is arrived；And it forms, conserve.
8. a kind of molding of the super high strength high performance fiber concrete of C180 strength grade described in any one of claims 1-6 is supported
Maintaining method, which is characterized in that use steam curing method, include the following steps:
Concrete batching system is poured into cast iron die molding, jolt ramming, temperature be 20 ± 2 DEG C, relative humidity >=95%
1d is stood in standard curing room, demoulding moves to concrete in High Temperature Curing equipment, is heated to 10 DEG C of heating rates per hour
It is 90 DEG C, thermostatic curing 2d, molten in the saturated limewater of standard curing room after being cooled to room temperature with speed identical with heating rate
Liquid, solution temperature are to conserve in 20 ± 2 DEG C of ponds to required age.
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| CN112521043B (en) * | 2020-12-15 | 2022-04-19 | 金昌市润为化建有限责任公司 | Concrete modified water reducing agent and preparation method thereof |
| CN113636811A (en) * | 2021-08-10 | 2021-11-12 | 成都精准混凝土有限公司 | Concrete for 3D printing and preparation method thereof |
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| CN106431137A (en) * | 2016-09-21 | 2017-02-22 | 太原理工大学 | Grapheme concrete and preparation method thereof |
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