CN117550867B - High-strength high-toughness steel slag-based cementing material and preparation method thereof - Google Patents
High-strength high-toughness steel slag-based cementing material and preparation method thereof Download PDFInfo
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- 239000002893 slag Substances 0.000 title claims abstract description 300
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 205
- 239000010959 steel Substances 0.000 title claims abstract description 205
- 239000000463 material Substances 0.000 title claims abstract description 133
- 238000002360 preparation method Methods 0.000 title abstract description 18
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 57
- 239000004568 cement Substances 0.000 claims abstract description 52
- 229920001971 elastomer Polymers 0.000 claims abstract description 46
- 239000000843 powder Substances 0.000 claims abstract description 45
- 239000000835 fiber Substances 0.000 claims abstract description 39
- 239000004743 Polypropylene Substances 0.000 claims abstract description 34
- -1 polypropylene Polymers 0.000 claims abstract description 34
- 229920001155 polypropylene Polymers 0.000 claims abstract description 34
- 239000004576 sand Substances 0.000 claims abstract description 25
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 20
- 239000010440 gypsum Substances 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000002994 raw material Substances 0.000 claims description 26
- 238000002156 mixing Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 9
- 239000004033 plastic Substances 0.000 claims description 6
- 239000004570 mortar (masonry) Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 239000010920 waste tyre Substances 0.000 claims description 4
- 238000005452 bending Methods 0.000 abstract description 13
- 239000003513 alkali Substances 0.000 abstract description 7
- 239000000203 mixture Substances 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 238000004064 recycling Methods 0.000 abstract description 2
- 239000002910 solid waste Substances 0.000 abstract description 2
- 239000011575 calcium Substances 0.000 abstract 1
- 229910052791 calcium Inorganic materials 0.000 abstract 1
- 229910010272 inorganic material Inorganic materials 0.000 abstract 1
- 239000011147 inorganic material Substances 0.000 abstract 1
- 239000011368 organic material Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 50
- 238000006703 hydration reaction Methods 0.000 description 18
- 230000036571 hydration Effects 0.000 description 16
- 230000000694 effects Effects 0.000 description 9
- 239000010881 fly ash Substances 0.000 description 8
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 230000006872 improvement Effects 0.000 description 6
- 230000005284 excitation Effects 0.000 description 5
- 238000000465 moulding Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000001878 scanning electron micrograph Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000006477 desulfuration reaction Methods 0.000 description 3
- 230000023556 desulfurization Effects 0.000 description 3
- XZWYZXLIPXDOLR-UHFFFAOYSA-N metformin Chemical compound CN(C)C(=N)NC(N)=N XZWYZXLIPXDOLR-UHFFFAOYSA-N 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 229910010413 TiO 2 Inorganic materials 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
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- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
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- 238000000746 purification Methods 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- SXAMGRAIZSSWIH-UHFFFAOYSA-N 2-[3-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]-1,2,4-oxadiazol-5-yl]-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C1=NOC(=N1)CC(=O)N1CC2=C(CC1)NN=N2 SXAMGRAIZSSWIH-UHFFFAOYSA-N 0.000 description 1
- WWSJZGAPAVMETJ-UHFFFAOYSA-N 2-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]-3-ethoxypyrazol-1-yl]-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C=1C(=NN(C=1)CC(=O)N1CC2=C(CC1)NN=N2)OCC WWSJZGAPAVMETJ-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
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- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
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- 239000000428 dust Substances 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000002149 energy-dispersive X-ray emission spectroscopy Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011499 joint compound Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003823 mortar mixing Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003911 water pollution 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
- C04B28/14—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 calcium sulfate cements
- C04B28/142—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/144—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B16/04—Macromolecular compounds
- C04B16/06—Macromolecular compounds fibrous
- C04B16/0616—Macromolecular compounds fibrous from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B16/0625—Polyalkenes, e.g. polyethylene
- C04B16/0633—Polypropylene
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
- C04B18/142—Steelmaking slags, converter slags
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/18—Waste materials; Refuse organic
- C04B18/20—Waste materials; Refuse organic from macromolecular compounds
- C04B18/22—Rubber, e.g. ground waste tires
-
- 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
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)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides a high-strength high-toughness steel slag-based cementing material and a preparation method thereof, and belongs to the technical field of solid waste recycling. The steel slag-based cementing material provided by the invention comprises the following components: 180-220 parts of slag, 180-220 parts of steel slag, 90-100 parts of cement, 1350-1400 parts of sand, rubber powder, polypropylene fibers, 4.5-5 parts of sodium hydroxide, 4.5-5 parts of desulfurized gypsum and 225-250 parts of water. The invention improves the toughness of steel slag from the internal factor and the external factor of the steel slag-based cementing material, wherein the internal factor uses high-calcium substances to improve the composition and the structure of main cementing products of the steel slag, and the external factor uses organic and inorganic materials with good dispersibility and alkali resistance in the environment of strong alkali of the excited steel slag. The results of the examples show that the steel slag-based cementing material has a 28-day bending load of 5.6kN, a bending strength of 13.1MPa, a deflection of about 1.6mm and a compressive strength of 36.0MPa.
Description
Technical Field
The invention relates to the technical field of solid waste recycling, in particular to a high-strength high-toughness steel slag-based cementing material and a preparation method thereof.
Background
The steel slag is mainly an industrial waste produced in the steelmaking process, the annual output of the coarse steel in 2022 years only reaches 10.6 hundred million tons, the accumulated accumulation amount of the steel slag in the same year reaches more than 20 hundred million tons, but the utilization rate of the steel slag is only 20-30%. The steel slag stored in a large amount occupies land resources, so that resource waste is caused, water pollution around a slag yard can be caused, and a large amount of dust can be generated when the steel slag is stored in the open air, so that haze weather is caused.
The utilization rate of the steel slag is improved mainly in the fields of building materials and the like. A large number of engineering practices prove that the steel slag is used as sand and stone aggregate, and the later concrete structure has serious cracking, peeling and steel bar corrosion phenomena, so that serious potential safety hazard is brought to the reinforced concrete structure, and the utilization rate of the steel slag is improved, so that the steel slag is more scientific and reasonable for cementing materials or mineral admixtures.
However, as the main component of the steel slag is similar to cement, the main hydration product C-S-H gel formed by the steel slag is a layered substance and is maintained only by virtue of Van der Waals force and weak ionic bond bonding, so that the steel slag-based cementing material has high brittleness and poor toughness, and the toughness of concrete is poorer when the steel slag-based cementing material is bonded with aggregate, thus severely restricting the development of the steel slag-based cementing material. Therefore, how to make the steel slag-based cementing material reach high strength and high toughness becomes a technical problem to be solved in the field, and is a premise for improving the utilization rate of the current steel slag.
Disclosure of Invention
The invention aims to provide a high-strength high-toughness steel slag-based cementing material and a preparation method thereof.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a high-strength high-toughness steel slag-based cementing material, which is prepared from the following raw materials in parts by mass: 180-220 parts of slag, 180-220 parts of steel slag, 90-100 parts of cement, 1350-1400 parts of sand, rubber powder, polypropylene fibers, 4.5-5 parts of sodium hydroxide, 4.5-5 parts of desulfurized gypsum and 225-250 parts of water.
Preferably, the mass ratio of the slag to the steel slag is 1:1.
preferably, the slag is a blast furnace slag of grade S95 or more, and the slag is a converter slag.
Preferably, the sand is medium sand.
Preferably, the volume of the rubber powder is 0.2-0.5% of the volume of the high-strength high-toughness steel slag-based cementing material, and the volume of the polypropylene fiber is 0.2-0.5% of the volume of the high-strength high-toughness steel slag-based cementing material.
Preferably, the rubber powder is common waste tire plastic black regenerated rubber powder, the granularity of the rubber powder is more than or equal to 10 meshes, and the density of the rubber powder is 1.0-1.5 g/cm 3 。
Preferably, the mass of the sodium hydroxide is 1% of the total mass of slag, steel slag and cement.
Preferably, the mass of the desulfurized gypsum is 1% of the total mass of the slag, the steel slag and the cement.
The invention provides a preparation method of the high-strength high-toughness steel slag-based cementing material, which comprises the following steps: and mixing the raw materials, stirring and forming the mortar, and curing to obtain the high-strength high-toughness steel slag-based cementing material.
Preferably, the curing temperature is 20.+ -. 2 ℃ and the relative humidity of the curing is >80%.
The invention provides a high-strength high-toughness steel slag-based cementing material, which is prepared from the following raw materials in parts by mass: 180-220 parts of slag, 180-220 parts of steel slag, 90-100 parts of cement, 1350-1400 parts of sand, rubber powder, polypropylene fibers, 4.5-5 parts of sodium hydroxide, 4.5-5 parts of desulfurized gypsum and 225-250 parts of water. According to the structural characteristics of the steel slag-based cementing material and the self-hydration environment, the mechanical properties of the steel slag-based cementing material are improved in two aspects of internal factor and external factor. The internal factor can generate se:Sub>A large amount of C-S-H and C-A-S-H gel under the excitation of cement and alkali by the slag-steel slag complex doping, and the strength and toughness of the steel slag-based cementing material are improved by optimizing the composition and structure of hydration products; by controlling the dosage relationship of slag and steel slag, the addition amount of the slag is relatively similar, and the slag provides a large amount of active CaO and partial SiO for the excitation of the steel slag 2 And Al 2 O 3 And the like, and CaO with high content and high activity is of a cross-linked structureThe C-A-S-H gel formation of the steel slag-slag composite material provides necessary conditions, and the synergistic effect of slag and steel slag is utilized to improve the later strength and toughness of the material; by controlling the water consumption, the hydration of the steel slag-based cementing material can be ensured, and the defects between phase interface transition areas in a steel slag-cement system can be reduced, so that the flexural strength and the deflection of the cementing material are improved, and the toughness of the material is improved; the toughness is improved externally by introducing rubber powder and polypropylene fiber as an external admixture, the two materials have the advantages of good water dispersibility, adjustable structure and alkali resistance, the polypropylene fiber is suitable for the alkaline environment of the steel slag-based cementing material, the compatibility is good when in construction with steel slag-slag, the rubber powder not only can increase the fluidity and plasticity of the steel slag-based cementing material and is suitable for the action of strong alkaline environment, but also can reduce the generation of cracks, the toughness is obviously increased, and meanwhile, the rubber powder and the polypropylene fiber are mixed again to be favorable for forming a crossed net structure in the steel slag-based cementing material, so that the structure has good ductility and can further improve the toughness of the cement-based material; therefore, the mechanical property of the steel slag-based cementing material is obviously improved and the brittleness is reduced through the control of the internal factor and the external factor. The results of the examples show that the 28-day bending load of the high-strength high-toughness steel slag-based cementing material provided by the invention reaches 5.6kN, the bending strength reaches 13.1MPa, the deflection is about 1.6mm, and the compressive strength reaches 36.0MPa.
Drawings
FIG. 1 is a graph showing the flexural load and deflection of a steel slag based cementitious material obtained in comparative example 1 before breaking;
FIG. 2 is a graph showing the relationship between flexural load and deflection before fracture of the steel slag based cementitious material of comparative example 2;
FIG. 3 is a graph showing the flexural load and deflection of the steel slag based cementitious material of comparative example 3 prior to fracture;
FIG. 4 is a graph showing the flexural load and deflection of the steel slag based cementitious material of comparative example 4 prior to fracture;
FIG. 5 is a graph showing the flexural load and deflection of the steel slag based cementitious material of comparative example 5 prior to fracture;
FIG. 6 is a graph showing the flexural load and deflection of the steel slag based cementitious material of comparative example 6 prior to fracture;
FIG. 7 is a graph showing the flexural load versus deflection of the steel slag based cementitious material of comparative example 7 prior to fracture;
FIG. 8 is a graph showing the flexural load and deflection of the steel slag based cementitious material of comparative example 8 prior to fracture;
FIG. 9 is a graph showing the flexural load and deflection of the steel slag based cementitious material of example 6 before fracture;
FIG. 10 is a graph showing the flexural load and deflection of the steel slag based cementitious material of example 1 prior to fracture;
FIG. 11 is a graph showing the flexural load and deflection of the steel slag based cementitious material of example 2 prior to fracture;
FIG. 12 is a graph showing the flexural load and deflection of the steel slag based cementitious material of example 3 prior to fracture;
FIG. 13 is a graph showing the flexural load and deflection of the steel slag based cementitious material of example 4 prior to fracture;
FIG. 14 is a graph showing the flexural load and deflection of the steel slag based cementitious material of example 5 prior to fracture;
FIG. 15 shows the compressive strengths of the steel slag-based cement obtained in comparative examples 1, 2, 5, 7, 8 and example 6 for 7 days, 14 days and 28 days;
FIG. 16 shows the compressive strength of the steel slag-based cement obtained in examples 1 to 5 for 7 days, 14 days and 28 days;
FIG. 17 shows the compressive strength of the steel slag-based cement obtained in example 7 and comparative examples 9 to 10 for 7 days, 14 days and 28 days;
FIG. 18 is an SEM image of a slag re-mixed sample obtained in example 7;
FIG. 19 is an SEM image of a slag re-mixed sample obtained in comparative example 9;
fig. 20 is an SEM image of the slag re-mixed sample obtained in comparative example 10.
Detailed Description
The invention provides a high-strength high-toughness steel slag-based cementing material, which is prepared from the following raw materials in parts by mass: 180-220 parts of slag, 180-220 parts of steel slag, 90-100 parts of cement, 1350-1400 parts of sand, rubber powder, polypropylene fibers, 4.5-5 parts of sodium hydroxide, 4.5-5 parts of desulfurized gypsum and 225-250 parts of water.
The raw materials for preparing the high-strength high-toughness steel slag-based cementing material comprise 180-220 parts of slag, preferably 190-210 parts of slag, and more preferably 190-200 parts of slag. In the present invention, the slag is preferably a blast furnace slag of grade S95 or more, more preferably a grade S95 blast furnace slag produced by the company of the river steel group; the slag preferably comprises the following components: 38.07wt.% CaO, siO 2 31.85wt.%、Fe 2 O 3 0.45wt.%、Al 2 O 3 14.95wt.%、MgO 11.3wt.%、SO 3 2.1wt.%、TiO 2 0.78wt.% and MnO 0.5wt.%. In the invention, the granularity of the slag is preferably more than or equal to 500 meshes; the density of the slag is preferably 2.80 g/cm 3 。
The raw materials for preparing the high-strength high-toughness steel slag-based cementing material further comprise 180-220 parts of steel slag, preferably 190-210 parts of steel slag and further preferably 190-200 parts of steel slag according to the mass part of the slag being 180-220 parts. In the present invention, the steel slag is preferably a converter steel slag, more preferably a converter steel slag produced by the company Handa, he Steel group; the converter steel slag is preferably prepared by a thermal stewing process; the component of the converter steel slag is preferably CaO 32.0wt.%, siO 2 19.1wt.%、Fe 2 O 3 22.0wt.%、Al 2 O 3 6.3wt.%, mgO 3.9wt.% and the balance impurities. In the invention, the granularity of the steel slag is preferably more than or equal to 200 meshes; the density of the steel slag is preferably 3.2 g/cm 3 。
In the present invention, the mass ratio of the slag to the steel slag is preferably 1:1.
the raw materials for preparing the high-strength high-toughness steel slag-based cementing material comprise 90-100 parts of cement according to 180-220 parts of slag by mass. In the present invention, the cement is preferably p.i 42.5 portland cement manufactured by chinese joint cement group limited; the density of the cement is preferably 3.16 g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the The cement preferably has a Bosch specific surface area of 3570 cm 2 And/g. The invention is thatBy adopting the cement as the raw material, the cement has two main purposes, namely, the cement is used as an exciting agent for steel slag and slag, and the early strength of the steel slag-based cementing material is quickly increased, the plastic cracking risk is reduced, and the brittleness is reduced.
The raw materials for preparing the high-strength high-toughness steel slag-based cementing material comprise 1350-1400 parts of sand according to 180-220 parts of slag by mass. In the present invention, the sand is preferably medium sand, more preferably medium sand with a fineness modulus of 2.6; the sand is preferably manufactured by Xiamen Ex European Standard sand Co., ltd; the sand preferably meets national standard GB/T17671-1999.
The raw materials for preparing the high-strength high-toughness steel slag-based cementing material also comprise rubber powder according to the mass portion of slag being 180-220. In the invention, the volume of the rubber powder is preferably 0.2-0.5% of the volume of the high-strength high-toughness steel slag-based cementing material, and more preferably 0.3-0.5%. In the invention, the rubber powder is preferably common waste tire plastic black reclaimed rubber powder; the granularity of the rubber powder is preferably more than or equal to 10 meshes, more preferably 20 meshes; the density of the rubber powder is preferably 1.0-1.5 g/cm 3 More preferably 1.2g/cm 3 。
The raw materials for preparing the high-strength high-toughness steel slag-based cementing material also comprise polypropylene fibers according to the mass portion of slag being 180-220. In the invention, the volume of the polypropylene fiber is preferably 0.2-0.5% of the volume of the high-strength high-toughness steel slag-based cementing material, and more preferably 0.3-0.5%. In the invention, the length of the polypropylene fiber is preferably 8-10 mm, more preferably 9mm; the polypropylene fibers are preferably produced by Shandong Laiwu Xingtai engineering materials factory.
The raw materials for preparing the high-strength high-toughness steel slag-based cementing material comprise, by mass, 180-220 parts of slag, and 4.5-5 parts of sodium hydroxide. In the invention, the mass percent of the sodium hydroxide is preferably more than or equal to 96.0 percent; the sodium hydroxide preferably meets GB/T629-1997 standard; the sodium hydroxide is preferably produced by the Tianjin Fuchen chemical reagent plant. In the present invention, the mass of the sodium hydroxide is preferably 1% of the total mass of slag, steel slag and cement.
The raw materials for preparing the high-strength high-toughness steel slag-based cementing material comprise 4.5-5 parts of desulfurized gypsum according to 180-220 parts of slag by mass. In the invention, the desulfurized gypsum preferably meets the GB/T37785-2019 standard; the particle size of the desulfurized gypsum is preferably less than or equal to 200 meshes; the desulfurized gypsum is preferably produced by a water purification material factory of the consolidated Yuan Heng. In the present invention, the mass of the desulfurized gypsum is preferably 1% of the total mass of slag, steel slag and cement.
The raw materials for preparing the high-strength high-toughness steel slag-based cementing material comprise, by mass, 180-220 parts of slag, and 225-250 parts of water.
According to the structural characteristics of the steel slag-based cementing material and the self-hydration environment, the mechanical properties of the steel slag-based cementing material are improved in two aspects of internal factor and external factor. The internal factor can generate se:Sub>A large amount of C-S-H and C-A-S-H gel under the excitation of cement and alkali by the slag-steel slag complex doping, and the strength and toughness of the steel slag-based cementing material are improved by optimizing the composition and structure of hydration products; by controlling the dosage relationship of slag and steel slag, the addition amount of the slag is relatively similar, and the slag provides a large amount of active CaO and partial SiO for the excitation of the steel slag 2 And Al 2 O 3 The high-content and high-activity CaO provides necessary conditions for the formation of C-A-S-H gel with se:Sub>A cross-linked structure, and the later strength and toughness of the material are improved by utilizing the synergistic effect of slag and steel slag; by controlling the water consumption, the hydration of the steel slag-based cementing material can be ensured, and the defects between phase interface transition areas in a steel slag-cement system can be reduced, so that the flexural strength and the deflection of the cementing material are improved, and the toughness of the material is improved; the toughness is improved by introducing rubber powder and polypropylene fiber as an external admixture, the two materials have the advantages of good water dispersibility, adjustable structure and alkali resistance, the polypropylene fiber is suitable for the alkaline environment of the steel slag-based cementing material, the compatibility with steel slag-slag construction is good, the rubber powder not only can increase the fluidity and plasticity of the steel slag-based cementing material and is suitable for the action of strong alkaline environment, but also can reduce the generation of cracks, obviously increase the toughness, and the rubber powder and the polypropylene fiber are blended again to be beneficialForming a crossed net structure in the steel slag-based adhesive material, wherein the structure has good ductility and can further improve the toughness of the cement-based material; therefore, the mechanical property of the steel slag-based cementing material is obviously improved and the brittleness is reduced through the control of the internal factor and the external factor.
The invention provides a preparation method of the high-strength high-toughness steel slag-based cementing material, which comprises the following steps: and mixing the raw materials, stirring and forming the mortar, and curing to obtain the high-strength high-toughness steel slag-based cementing material.
In the present invention, the temperature of the curing is preferably 20±2 ℃; the relative humidity of the maintenance is preferably more than 80%, more preferably more than or equal to 90%; the curing time is preferably more than or equal to 24 hours.
The technical solutions of the present invention will be clearly and completely described in the following in connection with the embodiments of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The sources of the raw materials used in the examples and comparative examples are as follows:
the slag is S95-level blast furnace slag produced by Handa Steel Co of He Steel, the fineness of the slag is 500 meshes, and the density is 2.80 g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the The slag comprises the following components: 38.07wt.% CaO, siO 2 31.85wt.%、Fe 2 O 3 0.45wt.%、Al 2 O 3 14.95wt.%、MgO 11.3wt.%、SO 3 2.1wt.%、TiO 2 0.78wt.% and MnO 0.5wt.%;
the steel slag is converter steel slag prepared by a heat stewing method process of a river steel group Handa company; the components of the converter steel slag are CaO 32.0wt.% and SiO 2 19.1wt.%、Fe 2 O 3 22.0wt.%、Al 2 O 3 6.3wt.%, mgO 3.9wt.% and the balance impurities; sieving the steel slag with a 200-mesh sieve; the density of the steel slag is 3.2 g/cm 3 ；
The cement is P.I 42.5 silicate produced by China Association Cement group Co., ltdCement; the density value of the cement is 3.16 g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the The cement has a Bosch specific surface area of 3570 cm 2 /g；
The sand is middle sand with fineness modulus of 2.6 produced by Xiamen Aisi European standard sand limited company, and accords with national standard GB/T17671-1999;
the rubber powder is common waste tire plastic black regenerated rubber powder; the granularity of the rubber powder is 20 meshes, and the density is 1.2g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the The polypropylene fiber is polypropylene fiber with the length of 9mm produced by Shandong Laiwuxing Tai engineering materials factory;
the sodium hydroxide is 96.0% of sodium hydroxide which is produced by Tianjin Fuchen chemical reagent factory and meets the GB/T629-1997 standard;
the desulfurization gypsum is produced by a consolidated Yuan Heng water purification material factory, the particle size of the desulfurization gypsum is less than or equal to 200 meshes, and the CaSO in the desulfurization gypsum 4 ·2H 2 The mass percentage of O is 90 percent, which accords with GB/T37785-2019 standard.
Examples 1 to 6
The raw materials of the high-strength high-toughness steel slag-based cementing material provided in the preparation examples 1-6 are shown in the table 1, wherein in the table 1, slag, steel slag, cement, water, sand, sodium hydroxide and desulfurized gypsum are all in parts by weight, and the mixing amount of rubber powder and polypropylene fiber is 0.5% of the volume of the steel slag-based cementing material; the mass of the sodium hydroxide is 1% of the total mass of slag, steel slag and cement; the mass of the desulfurized gypsum is 1% of the total mass of slag, steel slag and cement; the preparation method of the steel slag-based cementing material comprises the following steps: and mixing the raw materials, stirring and molding the raw materials, wherein the molding test mold is a triple mold with the thickness of 40mm multiplied by 160mm, then placing the triple mold into a standard curing box for curing, wherein the curing temperature is 20+/-1 ℃, the relative humidity of curing is not less than 95%, and after curing for 24 hours, demolding and continuously curing for 7 days, 14 days and 28 days in the curing box to obtain the high-strength high-toughness steel slag-based cementing material.
TABLE 1 preparation of raw materials for high-strength high-toughness Steel slag-based cementing Material provided in examples 1-6
| Examples | Slag (slag) | Steel slag | Cement and its preparation method | Water and its preparation method | Sand and sand | Rubber powder | Polypropylene fiber | Sodium hydroxide | Desulfurized gypsum |
| Example 1 | 180 | 220 | 100 | 225 | 1350 | 0.5% | 0.5% | 5 | 5 |
| Example 2 | 190 | 210 | 100 | 225 | 1350 | 0.5% | 0.5% | 5 | 5 |
| Example 3 | 200 | 200 | 100 | 225 | 1350 | 0.5% | 0.5% | 5 | 5 |
| Example 4 | 210 | 190 | 100 | 225 | 1350 | 0.5% | 0.5% | 5 | 5 |
| Example 5 | 220 | 180 | 100 | 225 | 1350 | 0.5% | 0.5% | 5 | 5 |
| Example 6 | 180 | 180 | 90 | 225 | 1350 | 0.5% | 0.5% | 4.5 | 4.5 |
Comparative examples 1 to 8
The raw materials for preparing the steel slag-based cementing material provided by comparative examples 1-8 are shown in Table 2, wherein in Table 2, fly ash, slag, steel slag, cement, water, sand, sodium hydroxide and desulfurized gypsum are all in parts by weight, and the mixing amount of rubber powder and polypropylene fiber is the volume percentage of the steel slag-based cementing material; the preparation method is the same as that of examples 1-6;
table 2 raw materials for preparing the steel slag-based cementitious materials provided in comparative examples 1 to 8
| Comparative example | Fly ash | Slag (slag) | Steel slag | Cement and its preparation method | Water and its preparation method | Sand and sand | Rubber powder | Polypropylene fiber | Sodium hydroxide | Desulfurized gypsum |
| Comparative example 1 | 0 | 0 | 360 | 90 | 225 | 1350 | 0 | 0 | 4.5 | 4.5 |
| Comparative example 2 | 0 | 180 | 180 | 90 | 225 | 1350 | 0 | 0 | 4.5 | 4.5 |
| Comparative example 3 | 180 | 0 | 180 | 90 | 225 | 1350 | 0 | 0 | 4.5 | 4.5 |
| Comparative example 4 | 0 | 0 | 360 | 90 | 225 | 1350 | 0 | 0.5% | 4.5 | 4.5 |
| Comparative example 5 | 0 | 0 | 360 | 90 | 225 | 1350 | 0 | 1% | 4.5 | 4.5 |
| Comparative example 6 | 0 | 0 | 360 | 90 | 225 | 1350 | 0.5% | 0 | 4.5 | 4.5 |
| Comparative example 7 | 0 | 0 | 360 | 90 | 225 | 1350 | 1% | 0 | 4.5 | 4.5 |
| Comparative example 8 | 0 | 0 | 360 | 90 | 225 | 1350 | 0.5% | 0.5% | 4.5 | 4.5 |
Fig. 1 to 9 are graphs showing the relationship between the flexural load and the deflection before fracture of the steel slag-based cementitious materials obtained in comparative examples 1 to 8 and example 6.
As can be seen from FIG. 1, the maximum 28-day fracture load of the steel slag-based cementing material obtained from steel slag and cement is not more than 4.8kN, and the maximum deflection is not more than 1.1mm.
As can be seen by comparing fig. 2 and 3, when slag and fly ash are added to the steel slag-based cementitious material, both the flexural load and deflection are improved. After the fly ash is added into the steel slag-based cementing material, the 28-day bending load reaches 5.1kN, which is improved by 6.9 percent and the deflection is improved by 8.3 percent compared with the comparative example 1; after slag is added into the steel slag-based cementing material, the 28-day bending load reaches 5.3kN, the deflection is increased by 10.4 percent compared with that of comparative example 1, the deflection is increased by nearly 0.2mm in a same way, and the deflection is increased by 25.7 percent. Compared with the slag, the modified effect of the slag on the steel slag-based cementing material is better.
As can be seen from fig. 4 and fig. 5, after polypropylene fibers with the volume doping amounts of 0.5% and 1% are respectively added on the basis of comparative example 1, the toughness of the steel slag-based cementing material can be obviously improved, and the improvement of the fracture load resistance is smaller, for example, when the doping amount of the polypropylene fibers is 1%, the fracture load resistance of the steel slag-based cementing material is improved by 7.3% in 28 days compared with that of comparative example 1, but the overall deflection of the steel slag-based cementing material is obviously improved, and the deflection of 28 days is improved by approximately 23.8% compared with that of comparative example 1.
As can be seen from fig. 6 and 7, after the rubber powder with the volume doping amount of 0.5% and 1% is added respectively on the basis of comparative example 1, the improvement of the flexural load of the rubber powder on the steel slag-based cementing material is small, the deflection improvement is obvious, and compared with comparative example 1, the deflection after 28 days is improved by 27.7% after the rubber powder with the doping amount of 1% is added.
As can be seen from FIG. 8, after 0.5% of polypropylene fiber and 0.5% of rubber powder are added simultaneously on the basis of comparative example 1, the flexural load and deflection of the steel slag-based cementing material are also obviously improved, and compared with comparative example 1, the flexural load is improved by 8.9% in 28 days, and the deflection is improved by 29.6%.
As can be seen from fig. 9, the flexural load and deflection of the steel slag-based cementing material are obviously improved by adding 0.5% of polypropylene fibers and rubber powder respectively on the basis of comparative example 2, and compared with comparative example 1, the flexural load is improved by 16.6% in 28 days, and the deflection is improved by nearly 50%.
Fig. 10 to 14 are graphs showing the relationship between the flexural load and the deflection before fracture of the steel slag-based cementitious materials obtained in examples 1 to 5.
As can be seen from fig. 10 to 14, the water-gel ratio of the steel slag-based cementing material obtained in examples 1 to 5 is 0.45, which is lower than the water-gel ratio of the steel slag-based cementing material obtained in example 6 by 0.5, and the fracture load and the deflection are improved along with the reduction of the water-gel ratio, which is beneficial to improving the toughness of the steel slag-based cementing material from the aspect of data.
As can be seen from fig. 1 to 14, the blending of fly ash and slag into the steel slag-based cementing material can improve the fracture load and deflection of the test piece, the effect of the slag is higher than that of the fly ash, the fracture load can be slightly improved due to the reduction of the water-cement ratio, and when the polypropylene fiber with the volume blending amount of 0.5% and the rubber powder with the volume blending amount of 0.5% are simultaneously blended into the steel slag-based cementing material, the toughness improvement effect of the steel slag-based cementing material is optimal.
The mechanism of improving the toughness of the steel slag-based cementing material by the polypropylene fiber is shown in the following two aspects: firstly, fibers crossing the cracks play a role in preventing the cracks in the steel slag-based cementing material from further expanding and expanding, and because of the large bonding force between the polypropylene fibers and the matrix, the bonding force needs to be overcome or the fibers are broken or pulled out when the cracks continue to expand, so that large breaking energy is consumed; secondly, the existence of the fiber can cause the test piece to crack on multiple sections, and new cracks can be generated on other sections of the steel slag-based cementing material under the condition that the polypropylene fiber is not pulled out or broken, so that stress and energy are dispersed on different sections to enhance the ductility of the test piece, and the steel slag-based cementing material added with the polypropylene fiber shows great plastic deformation; in addition, on the interface of the fiber and the cement mortar in the steel slag-based cementing material, the steel slag-based cementing material generates a large number of microcracks due to the pulling-out shear stress of the fiber, so that the energy is dispersed and consumed, and the stress concentration is alleviated.
The influence of the rubber powder on the performance of the steel slag-based cementing material is mainly expressed in two aspects: firstly, the fluidity, the plasticity and the adaptation to the action of strong alkali environment can be increased; secondly, the mechanical property of the steel slag-based cementing material is correspondingly improved. The rubber powder has relatively low elastic modulus, and can act as a soft elastomer in the steel slag-based cementing material, so that various internal stresses including shrinkage self-stress, temperature stress and the like can be relaxed, and the occurrence and development of internal primary cracks can be reduced; when the steel slag-based cementing material is subjected to external load, the steel slag-based cementing material can play a role of buffering and consume impact energy. In addition, certain bonding strength exists between the rubber powder particles and the steel slag-based cementing material matrix, and the fiber-like effect can be achieved when cracks are generated to inhibit the occurrence and development of the cracks, so that the stress is relaxed, and the toughness of the test piece is improved in a concentrated manner.
Fig. 15 shows compressive strengths of the steel slag-based cement obtained in comparative examples 1, 2, 5, 7, 8 and example 6 for 7 days, 14 days and 28 days.
As can be seen from fig. 15, the compressive strength of the steel slag-based cement can be remarkably improved by adding slag or an external admixture, the compressive strength improvement of the steel slag-based cement obtained in comparative examples 2, 5, 7, 8 and example 6 is about 2.5% -20% in 7 days and 14 days, and the compressive strength improvement of the steel slag-based cement obtained in example 6 is maximum in 28 days, reaches 24.1%, and reaches 36.0MPa higher than other comparative examples, relative to comparative example 1.
FIG. 16 shows the compressive strength of the steel slag-based cement obtained in examples 1 to 5 for 7 days, 14 days and 28 days.
As can be seen from FIG. 16, the compressive strength is significantly improved over example 6 by up to about 10% due to the reduction in the water to gel ratio, taking 28 days of compressive strength as an example.
In order to explore the principle that the toughness of the slag-based cementing material is improved by hydration products after slag re-doping, the mass ratio of slag to steel slag is designed to be 1:1. 1:2 and 1:3, the water-cement ratio is 0.5, and a slag re-doping sample is obtained, specifically as follows:
example 7 and comparative examples 9 to 10
The preparation method of the slag re-blending sample provided in example 7 and comparative examples 9 to 10 comprises the following steps: mixing slag, steel slag, cement and water, then carrying out mortar mixing molding, molding a six-joint mold with the molding test mold of 40mm multiplied by 40mm, then placing the six-joint mold into a standard curing box for curing, wherein the curing temperature is 20+/-1 ℃, the relative humidity of curing is more than or equal to 95%, and demoulding and continuing curing after 24h of curing to obtain the slag re-doping sample.
The raw materials of the slag re-mixed samples prepared in example 7 and comparative examples 9 to 10 are shown in table 3;
TABLE 3 raw materials (g) of slag complex samples prepared in example 7 and comparative examples 9 to 10
| Example | Proportion of | Steel slag | Slag (slag) | Cement and its preparation method | Water and its preparation method |
| Example 7 | 1：1 | 90 | 90 | 90 | 135 |
| Comparative example 9 | 1：2 | 120 | 60 | 90 | 135 |
| Comparative example 10 | 1：3 | 135 | 45 | 90 | 135 |
FIG. 17 shows the compressive strengths of slag re-blended samples obtained in example 7 and comparative examples 9 to 10 for 7 days, 14 days and 28 days.
As can be seen from fig. 17, the compressive strength values of the slag-blended samples at different curing ages are greatly changed, and the strength increase ratio of the slag-blended samples at the same curing age is great. At 28d curing age, in slag re-blending group 1: the compressive strength value of the sample in 1 reaches 45.0MPa, compared with 1: the compressive strength is respectively improved by 11.5%, 28.5% and 32.3% in 7 days, 14 days and 28 days, and the optimal mass ratio of slag to steel slag is 1:1, it can be shown that the compressive strength of macroscopic samples is greatly influenced after slag is re-mixed, and the strength increase is also greatly influenced in the later stage of hydration.
Fig. 18 to 20 are SEM images of slag re-doping samples obtained in example 7 and comparative examples 9 to 10 in this order.
As can be seen from FIGS. 18 to 20, the structural compactness of the slag re-doping sample is sequentially reduced. Needle-shaped products or raw slag particles do not appear in the types of hydration products, the hydration products mainly take flat C-S-H gel and cross-linked C-A-S-H gel as main materials, the C-S-H gel and other hydration products are interwoven with each other, the gel structure of the slag re-doping sample is more compact, and the slag re-doping sample has great effect on improving the strength and toughness of the later stage of the slag re-doping sample. In FIGS. 18 and 19, se:Sub>A relatively dense C-A-S-H gel with se:Sub>A crosslinked structure appears, which is mainly because the slag provides se:Sub>A large amount of active CaO elements and SiO for the excitation of the slag after the slag is mixed with the slag 2 And Al 2 O 3 The substances such as the CaO with high content and high activity create necessary conditions for the formation of the C-A-S-H gel with se:Sub>A cross-linked structure, so that the slag and the steel slag cooperate together to realize the later-stage strong alkaline-excited steel slag materialThe main factors of the increase in degree and toughness. Meanwhile, according to the energy spectrum EDS analysis of the element contents of four points in the graphs 18-20, the statistical results are shown in the table 4, the Cse:Sub>A/Si is 1.2-2.3 in the range of Cse:Sub>A/Si of hydration product C-A-S-H gel in the cement system, and the Al/Si ratio is close to 0.09-0.22 in the range of Al/Si of hydration product C-A-S-H gel in the cement system, so that the hydration product is C-A-S-H gel. In fig. 20, however, since the slag is incorporated in a small amount, the degree of hydration in the late stage is poor, and the hydration product mainly takes flat C-S-H gel as a main factor in the development of the material strength.
TABLE 4 distribution of elements in point scan (%)
| Element(s) | Point 1 | Point 2 | Point 3 | Point 4 |
| O | 62.88 | 65.68 | 67.99 | 62.34 |
| Al | 3.01 | 3.04 | 2.46 | 3.23 |
| Si | 13.14 | 14.58 | 11.52 | 10.59 |
| S | 6.37 | 4.42 | 5.97 | 4.97 |
| Ca | 14.60 | 12.23 | 12.05 | 12.88 |
According to the analysis, the slag and steel slag double-doped fly ash can be used for improving the bending load and deflection of the steel slag-based cementing material by changing hydration products, but the slag double-doped effect is better, meanwhile, the addition of the external additive greatly affects the bending load and deflection of the steel slag-based cementing material, and when the slag double-doped fly ash is doped, compared with comparative example 1, the bending load is improved by 10.4% in 28 days, the deflection is improved by 25.7%, and on the basis, after 0.5% of polypropylene fiber and 0.5% of rubber powder in volume fraction are added into the external additive, the bending load is 28.6 kN, the bending strength is 13.1MPa, the deflection is about 1.6mm, and the bending load is improved by 5.6% compared with the bending load, and the deflection is improved by 16.7%.
It was found by compressive strength measurement that when the mass ratio of slag to steel slag was 1:1, the mechanical property of the steel slag-based cementing material is optimal, and the compressive strength value of the slag re-doping sample reaches 45.0MPa when the curing age is 28 d; when 0.5% of polypropylene fibers and rubber powder are added to the slag in the mortar test piece, the 28-day compressive strength value of the prepared steel slag-based cementing material reaches 36.0MPa.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (8)
1. The high-strength high-toughness steel slag-based cementing material comprises the following raw materials in parts by mass: 180-220 parts of slag, 180-220 parts of steel slag, 90-100 parts of cement, 1350-1400 parts of sand, rubber powder, polypropylene fibers, 4.5-5 parts of sodium hydroxide, 4.5-5 parts of desulfurized gypsum and 225-250 parts of water;
the mass ratio of the slag to the steel slag is 1:1, a step of;
the volume of the rubber powder is 0.2-0.5% of the volume of the high-strength high-toughness steel slag-based cementing material, and the volume of the polypropylene fiber is 0.2-0.5% of the volume of the high-strength high-toughness steel slag-based cementing material.
2. The high-strength and high-toughness steel slag-based cement according to claim 1, wherein the slag is a S95 grade or higher blast furnace slag, and the steel slag is a converter steel slag.
3. The high strength, high toughness slag based cementitious material of claim 1, wherein said sand is a medium sand.
4. The high-strength and high-toughness steel slag-based cementing material according to claim 1, wherein the rubber powder is common waste tire plastic black reclaimed rubber powder, the granularity of the rubber powder is more than or equal to 10 meshes, and the density of the rubber powder is 1.0-1.5 g/cm 3 。
5. The high-strength and high-toughness steel slag-based cement according to claim 1, wherein the mass of the sodium hydroxide is 1% of the total mass of slag, steel slag and cement.
6. The high strength and high toughness steel slag based cementitious material according to claim 1, wherein the mass of the desulfurized gypsum is 1% of the total mass of slag, steel slag and cement.
7. The method for preparing the high-strength high-toughness steel slag-based cementing material according to any one of claims 1 to 6, comprising the following steps: and mixing the raw materials, stirring and forming the mortar, and curing to obtain the high-strength high-toughness steel slag-based cementing material.
8. The method of claim 7, wherein the curing temperature is 20±2 ℃, and the relative humidity of the curing is >80%.
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| CN103524086A (en) * | 2013-09-29 | 2014-01-22 | 张家港市山牧新材料技术开发有限公司 | Crack-resistant cement concrete |
| CN108892464A (en) * | 2018-08-29 | 2018-11-27 | 佛山市禅城区诺高环保科技有限公司 | A kind of environment-friendly type cementitious material and preparation method thereof |
| CN112830716A (en) * | 2021-01-13 | 2021-05-25 | 东北大学 | Multi-industry solid waste fiber modified geopolymer and preparation method thereof |
| CN115745432A (en) * | 2022-11-16 | 2023-03-07 | 西安建筑科技大学 | Industrial solid waste based green high-performance road cementing material and application thereof |
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| CN103524086A (en) * | 2013-09-29 | 2014-01-22 | 张家港市山牧新材料技术开发有限公司 | Crack-resistant cement concrete |
| CN108892464A (en) * | 2018-08-29 | 2018-11-27 | 佛山市禅城区诺高环保科技有限公司 | A kind of environment-friendly type cementitious material and preparation method thereof |
| CN112830716A (en) * | 2021-01-13 | 2021-05-25 | 东北大学 | Multi-industry solid waste fiber modified geopolymer and preparation method thereof |
| CN115745432A (en) * | 2022-11-16 | 2023-03-07 | 西安建筑科技大学 | Industrial solid waste based green high-performance road cementing material and application thereof |
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