CN116283349B - Shale ceramsite concrete and preparation method thereof - Google Patents
Shale ceramsite concrete and preparation method thereof Download PDFInfo
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- CN116283349B CN116283349B CN202310289018.7A CN202310289018A CN116283349B CN 116283349 B CN116283349 B CN 116283349B CN 202310289018 A CN202310289018 A CN 202310289018A CN 116283349 B CN116283349 B CN 116283349B
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- 239000004567 concrete Substances 0.000 title claims abstract description 49
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000002893 slag Substances 0.000 claims abstract description 63
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 31
- 239000010959 steel Substances 0.000 claims abstract description 31
- 239000004568 cement Substances 0.000 claims abstract description 23
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 21
- 239000011574 phosphorus Substances 0.000 claims abstract description 21
- 239000010881 fly ash Substances 0.000 claims abstract description 19
- 239000004576 sand Substances 0.000 claims abstract description 19
- 229920005646 polycarboxylate Polymers 0.000 claims abstract description 18
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 11
- 239000002518 antifoaming agent Substances 0.000 claims description 28
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 14
- 239000011707 mineral Substances 0.000 claims description 14
- 235000010755 mineral Nutrition 0.000 claims description 14
- 239000002131 composite material Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 238000012986 modification Methods 0.000 claims description 12
- 230000004048 modification Effects 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 11
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 8
- 238000000498 ball milling Methods 0.000 claims description 7
- 239000008030 superplasticizer Substances 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- 238000001354 calcination Methods 0.000 claims description 5
- 239000002270 dispersing agent Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 239000005995 Aluminium silicate Substances 0.000 claims description 4
- 235000012211 aluminium silicate Nutrition 0.000 claims description 4
- 239000000292 calcium oxide Substances 0.000 claims description 4
- 235000012255 calcium oxide Nutrition 0.000 claims description 4
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 4
- 238000005245 sintering Methods 0.000 claims description 4
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 4
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 3
- 229910052810 boron oxide Inorganic materials 0.000 claims description 3
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 3
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 3
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 3
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 claims description 3
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims description 3
- 239000004354 Hydroxyethyl cellulose Substances 0.000 claims description 2
- XHCLAFWTIXFWPH-UHFFFAOYSA-N [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] XHCLAFWTIXFWPH-UHFFFAOYSA-N 0.000 claims description 2
- 229910000416 bismuth oxide Inorganic materials 0.000 claims description 2
- 239000013530 defoamer Substances 0.000 claims description 2
- TYIXMATWDRGMPF-UHFFFAOYSA-N dibismuth;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Bi+3].[Bi+3] TYIXMATWDRGMPF-UHFFFAOYSA-N 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 claims description 2
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 2
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 2
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 2
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims description 2
- 229920000609 methyl cellulose Polymers 0.000 claims description 2
- 239000001923 methylcellulose Substances 0.000 claims description 2
- 235000010981 methylcellulose Nutrition 0.000 claims description 2
- 238000000518 rheometry Methods 0.000 claims description 2
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 claims description 2
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 2
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 2
- 229940048086 sodium pyrophosphate Drugs 0.000 claims description 2
- 235000019818 tetrasodium diphosphate Nutrition 0.000 claims description 2
- 229910001935 vanadium oxide Inorganic materials 0.000 claims description 2
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 6
- 238000012360 testing method Methods 0.000 description 13
- 238000003756 stirring Methods 0.000 description 12
- 239000002367 phosphate rock Substances 0.000 description 8
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 230000036571 hydration Effects 0.000 description 5
- 238000006703 hydration reaction Methods 0.000 description 5
- 238000004321 preservation Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 2
- 238000006557 surface reaction Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 241001365977 Mallos Species 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920003090 carboxymethyl hydroxyethyl cellulose Polymers 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- -1 defoamers Substances 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 229910052815 sulfur oxide Inorganic materials 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/04—Clay; Kaolin
-
- 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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/1305—Organic additives
-
- 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/009—Porous or hollow ceramic granular materials, e.g. microballoons
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
-
- 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
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
-
- 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)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the field of concrete materials, in particular to shale ceramsite concrete and a preparation method thereof, and the shale ceramsite concrete comprises the following components in parts by weight: 380 parts of cement, 100 parts of fly ash, 420 parts of shale ceramsite, 625 parts of river sand, 65 parts of steel slag, 65 parts of phosphorus slag, 5 parts of polycarboxylate water reducer and 220 parts of water.
Description
Technical Field
The invention relates to the field of concrete materials, in particular to shale ceramsite concrete and a preparation method thereof.
Background
Along with the development of modern buildings to high-rise, large-span and low-energy consumption, the requirements on the strength, heat preservation, water resistance and other performances of concrete are higher and higher. The lightweight aggregate concrete is a low-density concrete prepared from lightweight coarse aggregate, lightweight sand, cement and water. The lightweight aggregate concrete has the excellent characteristics of light weight, high strength, heat preservation, heat insulation, fire resistance and the like, has the functions of bearing and saving energy, and has become one of the main development directions of modern concrete materials.
Shale ceramsite concrete is one of lightweight aggregate concrete, the current research is mainly focused on utilizing the characteristics of lightweight, porous and the like of shale ceramsite, and the shale ceramsite concrete is added into the concrete according to a certain proportion so as to lighten the dead weight of the material and exert the heat preservation and insulation effects of the shale ceramsite, but the mechanical strength of the shale ceramsite is poor, the compressive strength of the prepared concrete is only 10-15 MPa, and the water absorption rate of the concrete material is increased due to the rich pores of the shale ceramsite, so that the service life is influenced.
Disclosure of Invention
The invention aims to: aiming at the technical problems, the invention provides shale ceramsite concrete and a preparation method thereof.
The technical scheme adopted is as follows:
the shale ceramsite concrete comprises the following components in parts by weight:
350-400 parts of cement, 90-110 parts of fly ash, 400-450 parts of shale ceramsite, 600-650 parts of river sand, 100-150 parts of composite mineral admixture, 1-5 parts of polycarboxylate superplasticizer and 200-230 parts of water.
Further, the method comprises the following steps in parts by weight:
380 parts of cement, 100 parts of fly ash, 420 parts of shale ceramisite, 625 parts of river sand, 130 parts of composite mineral admixture, 5 parts of polycarboxylate superplasticizer and 220 parts of water.
Further, the preparation method of the shale ceramsite comprises the following steps:
mixing and ball milling kaolin, an inorganic sintering aid, an organic aid and water to obtain slurry, soaking shale ceramsite in the slurry, taking out and drying, and calcining for 2-4 h at 1350-1450 ℃.
Further, the inorganic sintering aid is a metal or non-metal oxide with a melting point less than 900 ℃.
Further, the low-melting-point oxide is any one or a combination of a plurality of boron oxide, bismuth oxide and vanadium oxide.
Further, the organic aids include rheology agents, defoamers, and dispersants.
Further, the rheological agent is any one or a combination of more of methyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose and hydroxypropyl methyl cellulose;
The defoaming agent is any one or a combination of a plurality of BYK-024 defoaming agent, BYK-028 defoaming agent, BYK-051 defoaming agent, BYK-052 defoaming agent, BYK-053 defoaming agent, BYK-054 defoaming agent, BYK-056 defoaming agent, BYK-057 defoaming agent, BYK-065 defoaming agent, BYK-071 defoaming agent, BYK-085 defoaming agent, BYK-088 defoaming agent and BYK-141 defoaming agent;
The dispersing agent is any one or a combination of more of sodium polyacrylate, sodium pyrophosphate and sodium hexametaphosphate.
Further, the composite mineral admixture comprises any one or more of steel slag, lithium slag, phosphorus slag and nickel slag, preferably steel slag and phosphorus slag, and the weight ratio of the steel slag to the phosphorus slag is 1-5: 1 to 5.
Further, the composite mineral admixture is subjected to pre-modification treatment, and the method for the pre-modification treatment comprises the following steps:
and mixing and ball milling the composite mineral admixture and quicklime, and then heating to 750-850 ℃ for calcination for 2-4 h.
The invention also provides a preparation method of the shale ceramsite concrete, which comprises the following steps:
mixing cement, fly ash, shale ceramsite, river sand and composite mineral admixture, stirring, and then adding the polycarboxylate water reducer and water to be uniformly mixed.
The invention has the beneficial effects that:
According to the shale ceramsite concrete, the calcined product of kaolin can be adhered to the surface and pores of shale ceramsite, so that on one hand, the number of open pores on the surface of the shale ceramsite can be reduced, the water absorption rate is reduced, the mechanical strength of the shale ceramsite is improved, on the other hand, the surface of the shale ceramsite is roughened, the shale ceramsite concrete is favorable for being tightly meshed with cement hydration products and fine aggregates, the meshing effect increases friction, the bonding of the interface area of the shale ceramsite concrete is more compact, phosphorus slag and steel slag are used as gel materials, the granularity is reduced after ball milling, the surface reaction activation point is increased, and the surface reaction activation point is filled in micro gaps between unhydrated and hydration products, so that the concrete system is more compact, the compactness is improved, the hydration products with better stability are further generated, shrinkage is made up, P 2O5 in the phosphorus slag and sulfur oxides in the steel slag are all harmful components, the content of the harmful components can be reduced after the pre-modification treatment, the hydration activity is improved, the strength of the prepared shale ceramsite concrete is high, the compression resistance is good, and the heat insulation performance is low, and the water absorption rate is low.
Drawings
Fig. 1 is an interface structure diagram of the shale ceramsite concrete prepared in the embodiment 1 of the invention, and it can be observed that the shale ceramsite and cement paste are firmly bonded, the shale ceramsite and cement hydration products are meshed together, and the interface area has a compact structure.
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 unless otherwise indicated, the following examples and comparative examples are parallel tests, employing the same processing steps and parameters.
And (3) cement: PO42.5 Portland cement, conch;
Fly ash: class I fly ash with specific surface area of 450m 2/kg and density of 2200kg/m 3, lingshou county seaside mineral products trade company Limited;
shale ceramsite: self-making;
river sand: fineness modulus is 2.72, lingshou county seashore mineral products trade company;
Steel slag: selecting 5-20 mm continuous grading steel slag, wherein the content of sulfur trioxide is less than or equal to 4.0%, the content of chloride ions is less than or equal to 0.06%, the content of SO 3 in the desulfurization slag is 4.37% according to the requirements of GB/T20491-2017 for steel slag powder used in cement and concrete, and the stability is qualified;
Phosphorus slag: fine powder, apparent density of 2800g/cm 3, jiangsu and Lian Yungang mallo phosphorite;
polycarboxylate water reducer: shandong national chemical Co., ltd;
Water: all indexes of clean tap water meet the relevant regulations of JGJ 63-2006 water Standard for concrete.
Example 1:
the shale ceramsite concrete comprises the following components in parts by weight:
380 parts of cement, 100 parts of fly ash, 420 parts of shale ceramisite, 625 parts of river sand, 65 parts of steel slag, 65 parts of phosphorus slag, 5 parts of polycarboxylate superplasticizer and 220 parts of water.
The preparation method of the shale ceramsite comprises the following steps:
Uniformly mixing 5kg of kaolin, 20g of boron oxide, 2.5g of rheologic agent carboxymethyl cellulose, 5g of BYK-024 defoamer and 10g of dispersant sodium polyacrylate, adding 10L of water, ball-milling for 15h in a planetary ball mill at 400r/min to obtain slurry, adding 0.5kg of shale ceramisite with the particle size of 5-10 mm into the slurry, stirring and impregnating at room temperature for 30min, taking out, drying at 80 ℃ for 10h, and calcining at 1400 ℃ for 2h.
The steel slag and the phosphorite slag are subjected to pre-modification treatment, and the concrete method comprises the following steps:
Ethanol is used as a ball milling medium, steel slag, phosphorus slag and quicklime are added into a planetary ball mill to be mixed and ball-milled for 8 hours at 300r/min, the use amount of the quicklime is 5 percent of the total weight of the steel slag and the phosphorus slag, and the mixture is heated to 850 ℃ and calcined for 4 hours.
The preparation method of the shale ceramsite concrete comprises the following steps:
Mixing cement, fly ash, shale ceramsite, river sand, steel slag and phosphorite slag, stirring for 15min at 100r/min, adding a polycarboxylate water reducer and water, and stirring for 2min at 250 r/min.
Example 2:
the shale ceramsite concrete comprises the following components in parts by weight:
400 parts of cement, 110 parts of fly ash, 450 parts of shale ceramsite, 650 parts of river sand, 75 parts of steel slag, 75 parts of phosphorus slag, 5 parts of polycarboxylate water reducer and 230 parts of water.
The preparation method of shale ceramsite and the pre-modification treatment method of steel slag and phosphorus slag are the same as in example 1;
The preparation method of the shale ceramsite concrete comprises the following steps:
Mixing cement, fly ash, shale ceramsite, river sand, steel slag and phosphorite slag, stirring for 15min at 100r/min, adding a polycarboxylate water reducer and water, and stirring for 2min at 250 r/min.
Example 3:
the shale ceramsite concrete comprises the following components in parts by weight:
350 parts of cement, 90 parts of fly ash, 400 parts of shale ceramsite, 600 parts of river sand, 50 parts of steel slag, 50 parts of phosphorus slag, 1 part of polycarboxylate water reducer and 200 parts of water.
The preparation method of shale ceramsite and the pre-modification treatment method of steel slag and phosphorus slag are the same as in example 1;
The preparation method of the shale ceramsite concrete comprises the following steps:
Mixing cement, fly ash, shale ceramsite, river sand, steel slag and phosphorite slag, stirring for 15min at 100r/min, adding a polycarboxylate water reducer and water, and stirring for 2min at 250 r/min.
Example 4:
the shale ceramsite concrete comprises the following components in parts by weight:
400 parts of cement, 90 parts of fly ash, 450 parts of shale ceramisite, 600 parts of river sand, 75 parts of steel slag, 50 parts of phosphorus slag, 5 parts of polycarboxylate superplasticizer and 200 parts of water.
The preparation method of shale ceramsite and the pre-modification treatment method of steel slag and phosphorus slag are the same as in example 1;
The preparation method of the shale ceramsite concrete comprises the following steps:
Mixing cement, fly ash, shale ceramsite, river sand, steel slag and phosphorite slag, stirring for 15min at 100r/min, adding a polycarboxylate water reducer and water, and stirring for 2min at 250 r/min.
Example 5:
the shale ceramsite concrete comprises the following components in parts by weight:
350 parts of cement, 110 parts of fly ash, 400 parts of shale ceramisite, 650 parts of river sand, 50 parts of steel slag, 75 parts of phosphorite slag, 1 part of polycarboxylate superplasticizer and 230 parts of water.
The preparation method of shale ceramsite and the pre-modification treatment method of steel slag and phosphorus slag are the same as in example 1;
The preparation method of the shale ceramsite concrete comprises the following steps:
Mixing cement, fly ash, shale ceramsite, river sand, steel slag and phosphorite slag, stirring for 15min at 100r/min, adding a polycarboxylate water reducer and water, and stirring for 2min at 250 r/min.
Comparative example 1:
Substantially the same as in example 1, except that shale ceramsite having a commercially available particle size of 5 to 10mm was directly used instead of the homemade shale ceramsite.
Comparative example 2:
Substantially the same as in example 1, except that the steel slag and the phosphorous slag were not subjected to the pre-modification treatment.
Comparative example 3:
Substantially the same as in example 1, except that the same weight of steel slag was used instead of the phosphorus slag.
Comparative example 4:
substantially the same as in example 1, except that the same weight of the phosphorus slag was used instead of the steel slag.
Performance test:
Performance tests were performed on shale ceramsite concrete prepared in examples 1 to 5 and comparative examples 1 to 4 of the present invention;
Compressive strength: according to the compression strength test method in GB/T50081-2019 'test method Standard for physical and mechanical properties of concrete', a non-standard cube test piece with the thickness of 100mm multiplied by 100mm is adopted, 7d and 28d are maintained in a standard environment, and the compression strength is tested by a TYE-3000 type pressure tester and multiplied by a dimension conversion coefficient of 0.95;
Thermal conductivity coefficient: the method comprises the steps of adopting a protection hot plate method, according to the specification of GB/T10294-2008 heat insulation material steady state thermal resistance and related characteristic measurement protection hot plate method, measuring the heat conductivity coefficient of a test piece by adopting a double-plate heat conductivity coefficient meter IMDRY3001, wherein the test piece is 2 concrete plates with the thickness of 300mm multiplied by 30 mm;
Water absorption rate: curing a cubic test piece with the thickness of 150mm multiplied by 150mm, putting the cubic test piece into an electrothermal constant-temperature air blast drying oven, drying to constant weight, weighing the weight of the cubic test piece, marking the weight as m 1, then putting the test piece into water, soaking the test piece to constant weight, taking out the test piece, wiping the surface of the test piece by using a dry towel, weighing the test piece, marking the weight as m 2, and the water absorption rate of [ (m 2～m1)/m1 ]. 100%.
The test results are shown in table 1 below:
table 1:
As can be seen from the table 1, the shale ceramsite concrete prepared by the invention has high compressive strength, good heat preservation performance and low water absorption.
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 shale ceramsite concrete is characterized by comprising the following components in parts by weight:
350-400 parts of cement, 90-110 parts of fly ash, 400-450 parts of shale ceramsite, 600-650 parts of river sand, 100-150 parts of composite mineral admixture, 1-5 parts of polycarboxylate superplasticizer and 200-230 parts of water;
The preparation method of the shale ceramsite comprises the following steps:
mixing kaolin, an inorganic sintering aid, an organic aid and water, ball milling to obtain slurry, soaking shale ceramsite in the slurry, taking out and drying, and calcining for 2-4 h at 1350-1450 ℃;
the inorganic sintering aid is any one or a combination of a plurality of boron oxide, bismuth oxide and vanadium oxide;
the composite mineral admixture is steel slag and phosphorus slag, and the weight ratio of the steel slag to the phosphorus slag is 1-5: 1 to 5;
the composite mineral admixture is subjected to pre-modification treatment, and the method for the pre-modification treatment comprises the following steps:
and mixing and ball milling the composite mineral admixture and quicklime, and then heating to 750-850 ℃ for calcination for 2-4 h.
2. The shale ceramsite concrete according to claim 1, comprising, in parts by weight:
380 parts of cement, 100 parts of fly ash, 420 parts of shale ceramisite, 625 parts of river sand, 130 parts of composite mineral admixture, 5 parts of polycarboxylate superplasticizer and 220 parts of water.
3. The shale ceramsite concrete of claim 1, wherein the organic co-agent comprises a rheology agent, a defoamer, and a dispersant.
4. The shale ceramsite concrete of claim 3, wherein the rheological agent is any one or more of methylcellulose, carboxymethylcellulose, hydroxyethylcellulose, hydroxypropyl methylcellulose;
The defoaming agent is any one or a combination of a plurality of BYK-024 defoaming agent, BYK-028 defoaming agent, BYK-051 defoaming agent, BYK-052 defoaming agent, BYK-053 defoaming agent, BYK-054 defoaming agent, BYK-056 defoaming agent, BYK-057 defoaming agent, BYK-065 defoaming agent, BYK-071 defoaming agent, BYK-085 defoaming agent, BYK-088 defoaming agent and BYK-141 defoaming agent;
The dispersing agent is any one or a combination of more of sodium polyacrylate, sodium pyrophosphate and sodium hexametaphosphate.
5. The method for preparing shale ceramsite concrete according to any one of claims 1-4, wherein cement, fly ash, shale ceramsite, river sand and composite mineral admixture are mixed and stirred, and then a polycarboxylate water reducer and water are added and stirred uniformly.
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