CN115872700B - Concrete and hollow steel tube concrete rectangular beam - Google Patents
Concrete and hollow steel tube concrete rectangular beam Download PDFInfo
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- CN115872700B CN115872700B CN202211511691.2A CN202211511691A CN115872700B CN 115872700 B CN115872700 B CN 115872700B CN 202211511691 A CN202211511691 A CN 202211511691A CN 115872700 B CN115872700 B CN 115872700B
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- 239000004567 concrete Substances 0.000 title claims abstract description 49
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 26
- 239000010959 steel Substances 0.000 title claims abstract description 26
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 42
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000010451 perlite Substances 0.000 claims abstract description 39
- 235000019362 perlite Nutrition 0.000 claims abstract description 39
- 229910001579 aluminosilicate mineral Inorganic materials 0.000 claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical class O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000004964 aerogel Substances 0.000 claims abstract description 23
- 239000000843 powder Substances 0.000 claims abstract description 20
- 239000004568 cement Substances 0.000 claims abstract description 19
- 239000010881 fly ash Substances 0.000 claims abstract description 17
- 229920002748 Basalt fiber Polymers 0.000 claims abstract description 16
- 239000004927 clay Substances 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 3
- 239000004816 latex Substances 0.000 claims abstract 2
- 229920000126 latex Polymers 0.000 claims abstract 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 45
- 239000000243 solution Substances 0.000 claims description 39
- 235000019353 potassium silicate Nutrition 0.000 claims description 18
- 238000002360 preparation method Methods 0.000 claims description 18
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 18
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 15
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 15
- 239000000839 emulsion Substances 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 15
- 229940072033 potash Drugs 0.000 claims description 15
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 15
- 235000015320 potassium carbonate Nutrition 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 15
- 239000011812 mixed powder Substances 0.000 claims description 14
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims description 12
- 229920001046 Nanocellulose Polymers 0.000 claims description 10
- 239000002904 solvent Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- -1 perlite compound Chemical class 0.000 claims description 8
- 239000006185 dispersion Substances 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 6
- 230000032683 aging Effects 0.000 claims description 6
- 238000000498 ball milling Methods 0.000 claims description 6
- IJOOHPMOJXWVHK-UHFFFAOYSA-N chlorotrimethylsilane Chemical compound C[Si](C)(C)Cl IJOOHPMOJXWVHK-UHFFFAOYSA-N 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- HPTYUNKZVDYXLP-UHFFFAOYSA-N aluminum;trihydroxy(trihydroxysilyloxy)silane;hydrate Chemical compound O.[Al].[Al].O[Si](O)(O)O[Si](O)(O)O HPTYUNKZVDYXLP-UHFFFAOYSA-N 0.000 claims description 5
- 229910052621 halloysite Inorganic materials 0.000 claims description 5
- 230000003301 hydrolyzing effect Effects 0.000 claims description 4
- 238000001291 vacuum drying Methods 0.000 claims description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 3
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 238000001179 sorption measurement Methods 0.000 claims description 3
- 239000005051 trimethylchlorosilane Substances 0.000 claims description 3
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 2
- 238000005470 impregnation Methods 0.000 claims description 2
- 239000012190 activator Substances 0.000 claims 1
- 239000004566 building material Substances 0.000 abstract description 3
- 239000004576 sand Substances 0.000 description 12
- 238000012360 testing method Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 6
- 239000011150 reinforced concrete Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000036571 hydration Effects 0.000 description 3
- 238000006703 hydration reaction Methods 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 229920000592 inorganic polymer Polymers 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052604 silicate mineral Inorganic materials 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- 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
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the field of building materials, in particular to a concrete and hollow steel tube concrete rectangular beam which is prepared from the following raw materials in parts by weight: 100-130 parts of cement, 300-350 parts of aggregate, 20-30 parts of basalt fiber, 10-20 parts of calcined clay, 15-30 parts of fly ash, 10-20 parts of graphene oxide modified aluminosilicate mineral, 3-5 parts of exciting agent, 10-20 parts of aerogel expanded perlite, 5-10 parts of redispersible latex powder and 40-60 parts of water.
Description
Technical Field
The invention relates to the field of building materials, in particular to a concrete and hollow steel tube concrete rectangular beam.
Background
The reinforced concrete beam is made of reinforced concrete material, and may be made into independent beam, integral beam-slab building cover with reinforced concrete slab or single-layer or multilayer frame with reinforced concrete column. The reinforced concrete beam has various forms, is the most basic bearing member in engineering structures such as house buildings, bridge buildings and the like, and has extremely wide application range.
However, with the change of times and the development of economy, the building itself is also developed towards a large span and a large internal space and a higher height, and with the increase of building height and the requirement of building large space and large span, the load born by the vertical bearing member is increased, the size of the vertical member is also increased, and the dead weight is also increased, so that the bearing capacity and the anti-seismic requirement of the building are higher. And the reinforced concrete upper structure can cause the dead weight of the structure to be overlarge under the conditions of high-rise buildings and large spans, and also can cause large-volume concrete pouring to be complex, so that the construction speed is reduced. While steel structures have lighter dead weight, steel materials have higher prices and poor corrosion resistance and fire resistance. Therefore, the steel pipe concrete can be adopted, and the hollow steel pipe concrete is used as a branch of the steel pipe concrete, has the characteristics of light dead weight, prefabrication, low cost and the like compared with the steel pipe concrete, and can show the advantages of being applied to high-rise buildings.
Disclosure of Invention
The invention aims to: aiming at the technical problems or the development trend, the invention provides concrete and a hollow steel tube concrete rectangular beam.
The technical scheme adopted is as follows:
the concrete is prepared from the following raw materials in parts by weight:
100-130 parts of cement, 300-350 parts of aggregate, 20-30 parts of basalt fiber, 10-20 parts of calcined clay, 15-30 parts of fly ash, 10-20 parts of graphene oxide modified aluminosilicate mineral, 3-5 parts of excitant, 10-20 parts of aerogel expanded perlite, 5-10 parts of redispersible emulsion powder and 40-60 parts of water.
Further, the preparation method of the graphene oxide modified aluminosilicate mineral comprises the following steps:
adding aluminosilicate mineral into graphene oxide dispersion liquid, packaging in a ball milling tank, ball milling for 18-24h, atomizing the obtained slurry, conveying the atomized slurry into a reactor maintained at a set temperature through nitrogen, quickly evaporating the solvent at high temperature to form graphene oxide modified aluminosilicate mineral particles, and finally transferring the graphene oxide modified aluminosilicate mineral particles into a vacuum drying tank for thorough drying treatment.
Further, the aluminosilicate mineral is halloysite.
Further, the graphene oxide dispersion liquid is prepared by a brodie method, a staudenmailer method or a hummers method, the solvent of the graphene oxide dispersion liquid is water and ethyl acetate, and the volume ratio of the water to the ethyl acetate is 15-20:1.
further, the temperature of the reactor is 600-800 ℃.
Further, the excitant comprises potash water glass and sodium hydroxide, and the mass ratio of the potash water glass to the sodium hydroxide is 1-3:3-5.
Further, the preparation method of the aerogel expanded perlite comprises the following steps:
nanocellulose/SiO 2 Adding the hydrosol into a vacuum cylinder containing the expanded perlite, sealing the vacuum cylinder, starting a vacuum pump, controlling the impregnation adsorption pressure of the expanded perlite by adjusting the vacuum degree in the vacuum cylinder to obtain a hydrosol/expanded perlite compound, taking out the hydrosol/expanded perlite compound, sucking the hydrosol on the surface, aging for 24-48 hours at normal temperature, aging for 24-48 hours in water, sequentially replacing the solvent with ethanol, n-hexane and a mixed solution of trimethylchlorosilane/n-hexane, and drying for 4-8 hours at 60-100 ℃.
Further, the nanocellulose/SiO 2 The preparation method of the hydrosol comprises the following steps:
uniformly mixing water glass and water, adding hydrochloric acid solution into the mixture under stirring to ensure that the pH value of the solution is 1-2, sealing, stirring and hydrolyzing for 1-2 hours, adding nano cellulose, uniformly stirring, and adding ammonia water to regulate the pH value of the solution to 8-9.
The invention also provides a preparation method of the concrete, which comprises the following steps:
mixing cement, aggregate, basalt fiber, calcined clay, fly ash, graphene oxide modified aluminosilicate mineral and aerogel expanded perlite to obtain mixed powder, adding an exciting agent into a first part of water to prepare a first solution, adding redispersed emulsion powder into the rest of water to prepare a second solution, uniformly mixing the mixed powder with the first solution, adding the second solution, uniformly stirring, injecting into a mold, removing the mold after molding, and curing to a specified age under standard curing conditions.
The invention also provides a hollow steel tube concrete rectangular beam, which comprises a rectangular outer steel tube and an inner sleeve which are coaxial, wherein the concrete is filled between the rectangular outer steel tube and the inner sleeve.
The invention has the beneficial effects that:
the invention provides a concrete, aluminosilicate mineral and fly ash as auxiliary materialsUnder the action of an alkaline excitant, the inorganic polymer with high strength, long-term stability and good durability, which is formed by dissolving, hydrolyzing, polycondensing, curing and the like, can be tightly filled with cement hydration products and aggregates, so that the concrete performance is improved, the alumina silicate mineral modified by graphene oxide can be used as an auxiliary gel material and can promote the cement hydration process, the inorganic polymer generated by polymerizing the cement hydration crystals and the alumina silicate mineral is intertwined and interweaved to form a three-dimensional network microstructure, the mechanical performance of the concrete is obviously improved, the self weight of the concrete can be reduced by adding the expanded perlite, but the traditional expanded perlite has a honeycomb structure with lower strength, and the nanocellulose/SiO is realized 2 The gel filled expanded perlite holes can play a supporting and reinforcing role on the expanded perlite, so that the mechanical strength of the expanded perlite is improved, and the overall bearing performance of the concrete is improved.
Drawings
FIG. 1 is an SEM image of graphene oxide modified aluminosilicate mineral of example 1 of the present invention;
FIG. 2 is a schematic structural view of a hollow concrete filled steel tube rectangular beam, and reference numerals in the drawing respectively represent;
1-rectangular outer steel pipe, 2-inner sleeve and 3-concrete.
Detailed Description
The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention. The technology not mentioned in the present invention refers to the prior art.
And (3) cement: PO42.5 composite Portland cement and conch building materials;
river sand: sand in the zone II of Yangtze river production has fineness modulus of 2.5% and apparent density of 2380kg/m 3 ；
Ceramsite: shale ceramsite with nominal particle size of 5-10mm, cylinder pressure of 8.5MPa, water absorption rate of 3.3% in 1h and bulk density of 900kg/m 3 Apparent density 1350kg/m 3 ；
Basalt fiber: purchased from sea yang new materials limited in taean city;
calcining clay: purchased from Hebei Jianshi New Material technology Co., ltd;
fly ash: purchased from Hebei Jianshi New Material technology Co., ltd;
graphene oxide modified aluminosilicate minerals: self-making;
potash water glass: purchased from Shanghai Heng Utility Co., ltd;
sodium hydroxide: purchased from Hebei celebration chemical products limited;
aerogel expanded perlite: self-making;
redispersible emulsion powder: VAE redispersible emulsion powder, available from Shandong Xintanno chemical Co., ltd;
example 1:
the concrete is prepared from the following raw materials in parts by weight:
120 parts of cement, 120 parts of river sand, 200 parts of ceramsite, 25 parts of basalt fiber, 15 parts of calcined clay, 20 parts of fly ash, 18 parts of graphene oxide modified aluminosilicate mineral, 1 part of potash water glass, 4 parts of sodium hydroxide, 15 parts of aerogel expanded perlite, 10 parts of redispersible emulsion powder and 50 parts of water.
The preparation method of the graphene oxide modified aluminosilicate mineral comprises the following steps:
adding 20g of graphene oxide prepared by a hummers method into a solvent consisting of 200mL of deionized water and 10mL of ethyl acetate, carrying out ultrasonic oscillation to prepare a dispersion liquid, adding 45g of halloysite powder into the dispersion liquid, packaging in a ball milling tank, carrying out ball milling for 24 hours, atomizing the obtained slurry, conveying the atomized slurry into a reactor maintained at a set temperature of 780 ℃ through nitrogen, quickly evaporating the solvent at a high temperature to form graphene oxide modified aluminosilicate mineral particles, and finally transferring the obtained particles into a vacuum drying box for vacuum drying treatment at 50 ℃ for 24 hours.
The preparation method of the aerogel expanded perlite comprises the following steps:
mixing 200g water glass and 800mL water uniformly, stirringDropwise adding 1mol/L hydrochloric acid solution into the mixture under stirring to enable the pH value of the solution to be 1, sealing, stirring and hydrolyzing for 2 hours, adding 20g of nano cellulose, stirring uniformly, adding ammonia water to adjust the pH value of the solution to 9, and obtaining the nano cellulose/SiO 2 Hydrosol, nanocellulose/SiO 2 Adding the hydrosol into a vacuum cylinder containing 50g of expanded perlite, sealing the vacuum cylinder, starting a vacuum pump, regulating the dipping adsorption pressure in the vacuum cylinder to be-0.08 MPa for 2 hours to obtain a hydrosol/expanded perlite compound, taking out the hydrosol/expanded perlite compound, sucking the hydrosol on the surface, aging for 24 hours at normal temperature, aging for 24 hours in water, sequentially replacing the solvent with ethanol, n-hexane and a trimethylchlorosilane/n-hexane mixed solution (the mass ratio is 1:1), and drying at 80 ℃ for 8 hours.
The preparation method of the concrete comprises the following steps:
mixing cement, river sand, ceramsite, basalt fiber, calcined clay, fly ash, graphene oxide modified aluminosilicate mineral and aerogel expanded perlite to obtain mixed powder, adding potash water glass and sodium hydroxide into a first part of water to prepare a first solution, adding redispersed emulsion powder into the rest of water to prepare a second solution, uniformly mixing the mixed powder with the first solution, adding the second solution, uniformly stirring, injecting into a mold, removing the mold after molding, and curing to a specified age under standard curing conditions.
A hollow steel tube concrete rectangular beam comprises a rectangular outer steel tube (1) and an inner sleeve (2) which are coaxial, wherein the concrete (3) is filled between the rectangular outer steel tube (1) and the inner sleeve (2).
Example 2:
the concrete is prepared from the following raw materials in parts by weight:
130 parts of cement, 120 parts of river sand, 200 parts of ceramsite, 25 parts of basalt fiber, 20 parts of calcined clay, 30 parts of fly ash, 20 parts of graphene oxide modified aluminosilicate mineral, 1 part of potash water glass, 4 parts of sodium hydroxide, 20 parts of aerogel expanded perlite, 10 parts of redispersible emulsion powder and 60 parts of water.
The preparation method of the graphene oxide modified aluminosilicate mineral and the aerogel expanded perlite is the same as in example 1.
The preparation method of the concrete comprises the following steps:
mixing cement, river sand, ceramsite, basalt fiber, calcined clay, fly ash, graphene oxide modified aluminosilicate mineral and aerogel expanded perlite to obtain mixed powder, adding potash water glass and sodium hydroxide into a first part of water to prepare a first solution, adding redispersed emulsion powder into the rest of water to prepare a second solution, uniformly mixing the mixed powder with the first solution, adding the second solution, uniformly stirring, injecting into a mold, removing the mold after molding, and curing to a specified age under standard curing conditions.
Example 3:
the concrete is prepared from the following raw materials in parts by weight:
100 parts of cement, 120 parts of river sand, 200 parts of ceramsite, 25 parts of basalt fiber, 10 parts of calcined clay, 15 parts of fly ash, 10 parts of graphene oxide modified aluminosilicate mineral, 1 part of potash water glass, 4 parts of sodium hydroxide, 10 parts of aerogel expanded perlite, 5 parts of redispersible emulsion powder and 40 parts of water.
The preparation method of the graphene oxide modified aluminosilicate mineral and the aerogel expanded perlite is the same as in example 1.
The preparation method of the concrete comprises the following steps:
mixing cement, river sand, ceramsite, basalt fiber, calcined clay, fly ash, graphene oxide modified aluminosilicate mineral and aerogel expanded perlite to obtain mixed powder, adding potash water glass and sodium hydroxide into a first part of water to prepare a first solution, adding redispersed emulsion powder into the rest of water to prepare a second solution, uniformly mixing the mixed powder with the first solution, adding the second solution, uniformly stirring, injecting into a mold, removing the mold after molding, and curing to a specified age under standard curing conditions.
Example 4:
the concrete is prepared from the following raw materials in parts by weight:
130 parts of cement, 120 parts of river sand, 200 parts of ceramsite, 25 parts of basalt fiber, 10 parts of calcined clay, 30 parts of fly ash, 10 parts of graphene oxide modified aluminosilicate mineral, 1 part of potash water glass, 4 parts of sodium hydroxide, 20 parts of aerogel expanded perlite, 5 parts of redispersible emulsion powder and 60 parts of water.
The preparation method of the graphene oxide modified aluminosilicate mineral and the aerogel expanded perlite is the same as in example 1.
The preparation method of the concrete comprises the following steps:
mixing cement, river sand, ceramsite, basalt fiber, calcined clay, fly ash, graphene oxide modified aluminosilicate mineral and aerogel expanded perlite to obtain mixed powder, adding potash water glass and sodium hydroxide into a first part of water to prepare a first solution, adding redispersed emulsion powder into the rest of water to prepare a second solution, uniformly mixing the mixed powder with the first solution, adding the second solution, uniformly stirring, injecting into a mold, removing the mold after molding, and curing to a specified age under standard curing conditions.
Example 5:
the concrete is prepared from the following raw materials in parts by weight:
100 parts of cement, 120 parts of river sand, 200 parts of ceramsite, 25 parts of basalt fiber, 20 parts of calcined clay, 15 parts of fly ash, 20 parts of graphene oxide modified aluminosilicate mineral, 1 part of potash water glass, 4 parts of sodium hydroxide, 10 parts of aerogel expanded perlite, 10 parts of redispersible emulsion powder and 40 parts of water.
The preparation method of the graphene oxide modified aluminosilicate mineral and the aerogel expanded perlite is the same as in example 1.
The preparation method of the concrete comprises the following steps:
mixing cement, river sand, ceramsite, basalt fiber, calcined clay, fly ash, graphene oxide modified aluminosilicate mineral and aerogel expanded perlite to obtain mixed powder, adding potash water glass and sodium hydroxide into a first part of water to prepare a first solution, adding redispersed emulsion powder into the rest of water to prepare a second solution, uniformly mixing the mixed powder with the first solution, adding the second solution, uniformly stirring, injecting into a mold, removing the mold after molding, and curing to a specified age under standard curing conditions.
Comparative example 1:
substantially the same as in example 1, except that the graphene oxide-modified aluminosilicate mineral was not added.
Comparative example 2:
substantially the same as in example 1, except that graphene oxide modified aluminosilicate mineral was replaced with commercially available graphene oxide (beijing steton technologies development limited).
Comparative example 3:
substantially the same as in example 1, except that the graphene oxide-modified aluminosilicate mineral was replaced with halloysite powder.
Comparative example 4:
substantially the same as in example 1, except that graphene oxide modified aluminosilicate mineral was replaced with commercially available graphene oxide (beijing steton technologies development limited) and halloysite powder.
Performance test:
the concrete prepared in examples 1 to 5 and comparative examples 1 to 4 of the present invention was used as a test sample;
according to a drying method in a standard JGJ/T12-2019 lightweight aggregate concrete application technical standard, determining the dry apparent density of each test piece;
compressive strength and flexural strength are tested according to the standard GB/T17671-1999 method for testing cement mortar strength (ISO method);
impact resistance test reference standard CECS13:2009 Standard for fiber concrete test method, preparing a cake-shaped sample with the diameter of 150mm and the thickness of (63+/-3) mm, designing the test height to 5000mm, selecting a steel impact hammer with the weight of 5kg, taking out the well-maintained sample in advance, airing the sample during the test, placing the sample in the center of a chassis of an impact device, placing an impact steel ball in the center of the top surface of the sample, freely falling the impact hammer from a 5000mm rear edge guide pipe, impacting the impact steel ball placed on the top surface of the sample, completing one cycle of impact, carefully observing the condition that cracks appear on the surface (top surface and bottom surface) of the sample during the test, continuing repeatedly performing the impact cycle until the sample reaches a damage state, taking the average value of 6 tests as a final result when the sample has a crack with the width of 5 mm.
The test results are shown in table 1 below:
TABLE 1
As shown in the table 1, the concrete prepared by the invention has lower dry apparent density and good mechanical property, and can be used for manufacturing hollow steel tube concrete rectangular beams.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; 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 technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (5)
1. The concrete is characterized by being prepared from the following raw materials in parts by weight:
100-130 parts of cement, 300-350 parts of aggregate, 20-30 parts of basalt fiber, 10-20 parts of calcined clay, 15-30 parts of fly ash, 10-20 parts of graphene oxide modified aluminosilicate mineral, 3-5 parts of excitant, 10-20 parts of aerogel expanded perlite, 5-10 parts of redispersible emulsion powder and 40-60 parts of water;
the preparation method of the graphene oxide modified aluminosilicate mineral comprises the following steps:
adding aluminosilicate mineral into graphene oxide dispersion liquid, packaging in a ball milling tank, ball milling for 18-24h, atomizing the obtained slurry, conveying the atomized slurry into a reactor maintained at a set temperature through nitrogen, quickly evaporating a solvent at a high temperature to form graphene oxide modified aluminosilicate mineral particles, and finally transferring the graphene oxide modified aluminosilicate mineral particles into a vacuum drying box for thorough drying treatment, wherein the temperature of the reactor is 600-800 ℃;
the aluminosilicate mineral is halloysite;
the preparation method of the aerogel expanded perlite comprises the following steps:
nanocellulose/SiO 2 Adding hydrosol into a vacuum cylinder containing expanded perlite, sealing the vacuum cylinder, starting a vacuum pump, controlling the impregnation adsorption pressure of the expanded perlite by adjusting the vacuum degree in the vacuum cylinder to obtain a hydrosol/expanded perlite compound, taking out the hydrosol/expanded perlite compound, drying the hydrosol on the surface, aging for 24-48 hours at normal temperature, aging for 24-48 hours in water, sequentially replacing the solvent with ethanol, n-hexane and a mixed solution of trimethylchlorosilane/n-hexane, and drying for 4-8 hours at 60-100 ℃;
the nanocellulose/SiO 2 The preparation method of the hydrosol comprises the following steps:
uniformly mixing water glass and water, adding hydrochloric acid solution into the mixture under stirring to ensure that the pH value of the solution is 1-2, sealing, stirring and hydrolyzing for 1-2 hours, adding nano cellulose, uniformly stirring, and adding ammonia water to regulate the pH value of the solution to 8-9.
2. The concrete of claim 1, wherein the solvent of the graphene oxide dispersion is water and ethyl acetate, and the volume ratio of water to ethyl acetate is 15-20:1.
3. the concrete according to claim 1, wherein the activator comprises potash water glass and sodium hydroxide, and the mass ratio of the potash water glass to the sodium hydroxide is 1-3:3-5.
4. A method for preparing concrete according to any one of claims 1 to 3, wherein cement, aggregate, basalt fiber, calcined clay, fly ash, graphene oxide modified aluminosilicate mineral, aerogel expanded perlite are mixed to prepare mixed powder, an exciting agent is added into a first part of water to prepare a first solution, redispersible latex powder is added into the rest of water to prepare a second solution, the mixed powder is uniformly mixed with the first solution, then the second solution is added, uniformly mixed, injected into a mold, and the mold is removed after molding, and is cured to a specified age under standard curing conditions.
5. A hollow steel tube concrete rectangular beam characterized by comprising a rectangular outer steel tube and an inner sleeve which are coaxial, wherein the concrete of any one of claims 1-3 is filled between the rectangular outer steel tube and the inner sleeve.
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