CN110330282A - Composite gelled material and its preparation method and application - Google Patents
Composite gelled material and its preparation method and application Download PDFInfo
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- CN110330282A CN110330282A CN201910674391.8A CN201910674391A CN110330282A CN 110330282 A CN110330282 A CN 110330282A CN 201910674391 A CN201910674391 A CN 201910674391A CN 110330282 A CN110330282 A CN 110330282A
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- composite gelled
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- alkali
- activator
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00181—Mixtures specially adapted for three-dimensional printing (3DP), stereo-lithography or prototyping
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention provides a kind of composite gelled materials and its preparation method and application, are related to New Building Materials technical field.The composite gelled material includes solid powder and liquid material, wherein the solid powder includes red mud, hydraulic cement material, admixture, aggregate and water-reducing agent, and the liquid material includes the aqueous solution of alkali-activator.The composite gelled material being prepared by above-mentioned raw materials, by way of adding red mud, resistance to compression, the flexural strength of 3D printing construction material are not only improved, but also it is bad that existing cement-based material thixotropy has been effectively relieved, the problem of setting time is slower, can not be applied to 3D printing.Meanwhile turn waste into wealth reduce 3D printing building cost.
Description
Technical field
The present invention relates to New Building Materials technical fields, more particularly, to a kind of composite gelled material and preparation method thereof
And application.
Background technique
Red mud is that aluminium industry extracts the pollution waste residue being discharged when aluminium oxide, and average 1 ton of aluminium oxide of every production is attached
Band can generate 1.0~2.0 tons of red muds.In recent years, with the continuous development of aluminum smelting industry, annual red mud discharge amount is increasing,
However lack in the prior art relative maturity and can scale utilize red mud application technology, in turn resulted in a large amount of red mud
It sufficiently effective cannot utilize, can only be stacked by the stockyard of large area, not only occupy a large amount of soils, also environment is caused
Serious pollution.
3D printing is a kind of quick shaping process of innovation, be by 3D printer to the 3D pattern of computer design carry out by
Layer printing is to construct object.In recent years, 3D printing is applied to building field by more and more researchers, by 3D printing come
Manufacture house, building etc..But existing most 3D printing construction materials are made based on the raw materials such as cement, sand
, 3D printing building materials are seldom prepared using industrial solid castoff, this also results in existing 3D printing construction material cost and occupies
It is high not under, seriously affected the popularization of this new technology.
In view of this, the composite gelled material that scale utilizes can be carried out to red mud it is necessary to study one kind is developed, and
The composite gelled material is applied in 3D printing building field, and then is turned waste into wealth, pollution of the red mud to environment has both been reduced,
The materials such as a large amount of cement are saved again, reduce the cost of 3D printing building, it will be by the welcome in market.
Summary of the invention
The first object of the present invention is to provide a kind of composite gelled material, and the composite gelled material passes through addition red mud
Mode, not only improve the compressive property of 3D printing construction material, but also existing cement-based material thixotroping has been effectively relieved
Property it is bad, can not be applied to 3D printing the problem of.
The second object of the present invention is to provide the preparation method of composite gelled material described in one kind, preparation method tool
There is the advantages that preparation process is simple, easy to operate, easy to implement, and preparation process does not need special process equipment.
The third object of the present invention is to provide a kind of application of composite gelled material, which can be extensive
In preparation field applied to 3D printing building.
A kind of composite gelled material provided by the invention, the composite gelled material include solid powder and liquid material,
In: the solid powder includes red mud, hydraulic cement material, admixture, aggregate and water-reducing agent；The liquid material includes alkali-activated carbonatite
The aqueous solution of agent.
Further, the solid powder, by mass percentage, mainly consist of the following components: red mud 15~
25wt%, 0~7wt% of hydraulic cement material, 9~25wt% of admixture, 45~75wt% of aggregate, 1~5wt% of water-reducing agent.
Further, the aqueous solution of the alkali-activator, by mass percentage, mainly consist of the following components: alkali swashs
Send out 20~25wt% of agent and 75~80wt% of water；
Preferably, the aqueous solution of the alkali-activator, by mass percentage, mainly consist of the following components: alkali-activated carbonatite
76~78wt% of 22~24wt% of agent and water；
It is furthermore preferred that the alkali-activator is sodium metasilicate.
Further, the mass ratio of the solid powder and liquid material is (80~120): (16~20), preferably 100:
(16~20).
Further, the hydraulic cement material includes in portland cement, sulphate aluminium cement and ferrous aluminate cement
At least one；
Preferably, the hydraulic cement material is 42.5# ordinary portland cement.
Further, the admixture includes at least one of flyash, pulverized limestone and steel-making Water Quenching Slag；
Preferably, the admixture is flyash.
Preferably, the aggregate includes at least one of iron tailings, nickel tailing, copper tailing and river sand；
It is furthermore preferred that the aggregate is iron tailings.
Further, the water-reducing agent includes at least one of naphthalene water reducer, preferably FDN water-reducing agent.
A kind of preparation method of above-mentioned composite gelled material provided by the invention, the preparation method comprises the following steps:
Solid powder and liquid material are uniformly mixed, composite gel material is obtained.
Further, the preparation method comprises the following steps:
(a), red mud, hydraulic cement material, admixture aggregate and water-reducing agent are mixed, obtains solid powder；
(b), alkali-activator is dissolved in the water, obtains liquid material；
(c), the solid powder that step (a) obtains and the liquid material that step (b) obtains are mixed, obtains plural gel material
Material；
The sequence interchangeable of the step (a) and step (b)；
It preferably, further include by red mud, hydraulic cement material, admixture and bone before the step (a) prepares mixed powder
The step of material is crushed respectively.
A kind of application according to above-mentioned composite gelled material in preparation 3D printing building provided by the invention.
Compared with prior art, the invention has the benefit that
Composite gelled material provided by the invention, the composite gelled material include solid powder and liquid material, wherein institute
Stating solid powder includes red mud, hydraulic cement material, admixture, aggregate and water-reducing agent, and the liquid material includes alkali-activator
Aqueous solution.The composite gelled material being prepared by above-mentioned raw materials not only improves 3D printing and builds by way of adding red mud
Resistance to compression, the flexural strength of material are built, but also has been effectively relieved that existing cement-based material thixotropy is bad, and setting time is slower,
The problem of can not being applied to 3D printing.Meanwhile turning waste into wealth and also reducing the cost of 3D printing building.
The preparation method of composite gelled material provided by the invention, above-mentioned preparation method by red mud, hydraulic cement material, mix
It is uniformly mixed with the aqueous solution of material, aggregate, water-reducing agent and alkali-activator, obtains composite gel material.The preparation method has system
It is standby simple process, easy to operate, easy to implement, the advantages that preparation process does not need special process equipment.
Composite gelled material provided by the invention can be widely applied in the preparation field of 3D printing building.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with embodiment, it is clear that described reality
Applying example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
Art personnel every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
According to an aspect of the present invention, a kind of composite gelled material, the composite gelled material include solid powder and
Liquid material, in which:
The solid powder includes red mud, hydraulic cement material, admixture, aggregate and water-reducing agent；
The liquid material includes the aqueous solution of alkali-activator.
Composite gelled material provided by the invention, the composite gelled material include solid powder and liquid material, wherein institute
Stating solid powder includes red mud, hydraulic cement material, admixture, aggregate and water-reducing agent, and the liquid material includes alkali-activator
Aqueous solution.The composite gelled material being prepared by above-mentioned raw materials not only improves 3D printing and builds by way of adding red mud
Resistance to compression, the flexural strength of material are built, but also has been effectively relieved that existing cement-based material thixotropy is bad, and setting time is slower,
The problem of can not being applied to 3D printing.Meanwhile turning waste into wealth and also reducing the cost of 3D printing building.
In the preferred embodiment of the present invention, the solid powder, by mass percentage, mainly by with the following group
It is grouped as: 15~25wt% of red mud, 0~7wt% of hydraulic cement material, 9~25wt% of admixture, 45~75wt% of aggregate, subtracting
1~5wt% of aqua.
The above-mentioned typical but non-limiting preferred embodiment of red mud are as follows: 15wt%, 16wt%, 17wt%, 18wt%,
19wt%, 20wt%, 21wt%, 22wt%, 23wt%, 24wt% and 25wt%；Above-mentioned hydraulic cement material typical case but non-limit
The preferred embodiment of property processed are as follows: 0wt%, 1wt%, 2wt%, 3wt%, 4wt%, 5wt%, 6wt% and 7wt%；It is above-mentioned to mix
With expect typical but non-limiting preferred embodiment are as follows: 9wt%, 10wt%, 12wt%, 15wt%, 18wt%, 20wt%,
22wt% and 25wt%；The above-mentioned typical but non-limiting preferred embodiment of aggregate are as follows: 45wt%, 50wt%, 55wt%,
60wt%, 65wt%, 70wt% and 75wt%；The above-mentioned typical but non-limiting preferred embodiment of water-reducing agent are as follows: 1wt%,
2wt%, 3wt%, 4wt% and 5wt%；
The sum of red mud, hydraulic cement material, admixture, aggregate, water-reducing agent and optional auxiliary agent are in above-mentioned solid powder
100wt%.
In the preferred embodiment of the present invention, the aqueous solution of the alkali-activator, by mass percentage, mainly
It is composed of the following components: 75~80wt% of 20~25wt% of alkali-activator and water；
The sum of alkali-activator, water and optional auxiliary agent are 100wt% in the aqueous solution of above-mentioned alkali-activator.
The above-mentioned typical but non-limiting preferred embodiment of alkali-activator are as follows: 20wt%, 21wt%, 22wt%,
23wt%, 24wt% and 25wt%；The above-mentioned typical but non-limiting preferred embodiment of water are as follows: 75wt%, 76wt%,
77wt%, 78wt%, 79wt% and 80wt%.
Preferably, the aqueous solution of the alkali-activator, by mass percentage, mainly consist of the following components: alkali-activated carbonatite
76~78wt% of 22~24wt% of agent and water；
In the present invention, by the further adjustment and optimization to each component raw material dosage ratio, to advanced optimize
The technical effect of composite gelled material of the present invention.
It is furthermore preferred that the alkali-activator is sodium metasilicate.
As a preferred embodiment, above-mentioned alkali-activator is sodium metasilicate, sodium metasilicate is commonly called as sodium silicate, waterglass,
It is a kind of water-soluble silicate.The sodium metasilicate can fix the alkali in cementitious material, improve the endurance quality of cementitious material.
In the preferred embodiment of the present invention, the modulus of the sodium silicate aqueous solution (waterglass) be 1.3~
2.3.As a preferred embodiment, the modulus selection of sodium silicate aqueous solution can effectively improve the mechanical property of cementitious material
Can, modulus is too high or too low all to have large effect to the mechanical property of cementitious material.
The typical but non-limiting preferred embodiment of the modulus of above-mentioned waterglass are as follows: 1.3,1.5,1.8,2.0,2.1 and
2.3。
In the preferred embodiment of the present invention, the mass ratio of the solid powder and liquid material is (80~120):
(16~20), preferably 100:(16~20).
The typical but non-limiting preferred embodiment of the mass ratio of above-mentioned solid powder and liquid material are as follows: 80:16,80:
18,80:20,100:16,100:18,100:20,120:16,120:18 and 120:20.
As a preferred embodiment, the glue that above-mentioned solid powder and liquid material obtain after being compounded with above-mentioned mass ratio
Gel material has good intensity and setting time, can sufficiently meet the needs of 3D printing building.
In the preferred embodiment of the present invention, the hydraulic cement material includes portland cement, aluminium sulfate
At least one of cement and ferrous aluminate cement；
As a preferred embodiment, above-mentioned hydraulic cement material include portland cement, sulphate aluminium cement and
At least one of ferrous aluminate cement.Above-mentioned sulphate aluminium cement and ferrous aluminate cement are quick-hardening cement, by itself and silicon
The setting time of cementitious material can effectively be accelerated after acid salt cement mixing, cementitious material is touched to be adapted to 3D printing building
The requirement of denaturation.
Preferably, the hydraulic cement material is the mixture of portland cement and sulphate aluminium cement；
Preferably, the portland cement is 42.5# ordinary portland cement.
In the preferred embodiment of the present invention, the admixture includes flyash, pulverized limestone and steel-making Water Quenching Slag
At least one of；
As a preferred embodiment, above-mentioned admixture includes flyash, pulverized limestone and makes steel in Water Quenching Slag extremely
Few one kind, the partial size of the admixture are 100~200um.
The typical but non-limiting preferred embodiment of the partial size of above-mentioned admixture are as follows: 100um, 120um, 140um,
160um, 180um and 200um.
Preferably, the admixture is flyash.
Preferably, the aggregate includes at least one of iron tailings, nickel tailing, copper tailing and river sand；
As a preferred embodiment, above-mentioned aggregate include in iron tailings, nickel tailing, copper tailing and river sand at least
One kind, the partial size of the aggregate are 5~20mm.
The typical but non-limiting preferred embodiment of the partial size of above-mentioned aggregate are as follows: 5mm, 8mm, 10mm, 12mm, 15mm,
18mm and 20mm.
It is furthermore preferred that the aggregate is iron tailings.
In the preferred embodiment of the present invention, the water-reducing agent includes at least one of naphthalene water reducer；
As a preferred embodiment, above-mentioned water-reducing agent is at least one of naphthalene series high-efficiency water-reducing agent.The naphthalene
Series high-efficiency water-reducing agent is naphthalenesulfonate formaldehyde condensation compound, has very strong peptizaiton to cement particle.
Preferably, the water-reducing agent is FDN water-reducing agent.FDN water-reducing agent main component is beta-naphthalenesulfonic-acid salt formaldehyde condensation products,
Corrosiveness is not generated with stronger peptizaiton, while after compounding with the raw materials such as red mud and steel slag powder.
According to an aspect of the present invention, a kind of preparation method of above-mentioned composite gelled material, the preparation method include
Following steps:
Solid powder and liquid material are uniformly mixed, composite gel material is obtained.
The preparation method of composite gelled material provided by the invention, above-mentioned preparation method mix solid powder and liquid material
Uniformly, composite gel material is obtained.The preparation method has preparation process simple, easy to operate, easy to implement, and preparation process is not
The advantages that needing special process equipment.
In the preferred embodiment of the present invention, the preparation method comprises the following steps:
(a), red mud, hydraulic cement material, admixture aggregate and water-reducing agent are mixed, obtains solid powder；
(b), alkali-activator is dissolved in the water, obtains liquid material；
(c), the solid powder that step (a) obtains and the liquid material that step (b) obtains are mixed, obtains plural gel material
Material；
The sequence interchangeable of the step (a) and step (b)；
As a preferred embodiment, further including by red mud, the hydraulicity before above-mentioned steps (a) prepare mixed powder
The step of gelating material, admixture and aggregate are crushed respectively.
Preferably, the partial size of the aggregate is 2~5mm；
Preferably, the partial size of the red mud, hydraulic cement material and admixture is 50~75 μm.
According to an aspect of the present invention, a kind of answering in preparation 3D printing building according to above-mentioned composite gelled material
With.
Composite gelled material provided by the invention can be widely applied in the preparation field of 3D printing building.
Technical solution of the present invention is described further below in conjunction with embodiment and comparative example.
Embodiment 1
A kind of composite gelled material for 3D printing building, according to the mass fraction, the composite gelled material include solid
Body powder and liquid material, in which:
The solid powder, it is by mass percentage, composed of the following components: red mud 15wt%, flyash 9wt%, iron
Tailing 75wt%, FDN water-reducing agent 1wt%；
The aqueous solution of the alkali-activator, it is by mass percentage, composed of the following components: sodium metasilicate 20wt% and water
80wt%；
The mass ratio of the solid powder and liquid material is 100:16；
The preparation method of the above-mentioned composite gelled material for 3D printing building, comprising the following steps:
(a), red mud, admixture, aggregate and FDN water-reducing agent are mixed, obtains solid powder；
(b), the aqueous solution of the solid powder and alkali-activator that obtain step (a) mixes, and obtains composite gelled material.
Embodiment 2
A kind of composite gelled material for 3D printing building, according to the mass fraction, the composite gelled material include solid
Body powder and liquid material, in which:
The solid powder, it is by mass percentage, composed of the following components: red mud 25wt%, 42.5# normal silicate
Cement 7wt%, flyash 9wt%, iron tailings 58wt%, FDN water-reducing agent 1wt%；
The aqueous solution of the alkali-activator, it is by mass percentage, composed of the following components: sodium metasilicate 25wt% and water
75wt%；
The mass ratio of the solid powder and liquid material is 100:20；
The preparation method is the same as that of Example 1 for the present embodiment.
Embodiment 3
A kind of composite gelled material for 3D printing building, according to the mass fraction, the composite gelled material include solid
Body powder and liquid material, in which:
The solid powder, it is by mass percentage, composed of the following components: red mud 18wt%, 42.5# normal silicate
Cement 2wt%, flyash 14wt%, iron tailings 65wt%, FDN water-reducing agent 1wt%；
The aqueous solution of the alkali-activator, it is by mass percentage, composed of the following components: sodium metasilicate 22wt% and water
78wt%；
The mass ratio of the solid powder and liquid material is 90:18；
The preparation method is the same as that of Example 1 for the present embodiment.
Embodiment 4
A kind of composite gelled material for 3D printing building, according to the mass fraction, the composite gelled material include solid
Body powder and liquid material, in which:
The solid powder, it is by mass percentage, composed of the following components: red mud 22wt%, 42.5# normal silicate
Cement 5wt%, flyash 9wt%, iron tailings 63wt%, FDN water-reducing agent 1wt%；
The aqueous solution of the alkali-activator, it is by mass percentage, composed of the following components: sodium metasilicate 24wt% and water
76wt%；
The mass ratio of the solid powder and liquid material is 120:20；
The preparation method is the same as that of Example 1 for the present embodiment.
Embodiment 5
A kind of composite gelled material for 3D printing building, according to the mass fraction, the composite gelled material include solid
Body powder and liquid material, in which:
The solid powder, it is by mass percentage, composed of the following components: red mud 20wt%, 42.5# normal silicate
Cement 4wt%, flyash 9wt%, iron tailings 66wt%, FDN water-reducing agent 1wt%；
The aqueous solution of the alkali-activator, it is by mass percentage, composed of the following components: sodium metasilicate 23wt% and water
77wt%；
The mass ratio of the solid powder and liquid material is 100:18；
The preparation method is the same as that of Example 1 for the present embodiment.
Embodiment 6
A kind of composite gelled material for 3D printing building, according to the mass fraction, the composite gelled material include solid
Body powder and liquid material, in which:
The solid powder, it is by mass percentage, composed of the following components: red mud 30wt%, 42.5# normal silicate
Cement 5wt%, flyash 4wt%, iron tailings 60wt%, FDN water-reducing agent 1wt%；
The aqueous solution of the alkali-activator, it is by mass percentage, composed of the following components: sodium metasilicate 23wt% and water
77wt%；
The mass ratio of the solid powder and liquid material is 100:18；
The preparation method is the same as that of Example 1 for the present embodiment.
Embodiment 7
A kind of composite gelled material for 3D printing building, according to the mass fraction, the composite gelled material include solid
Body powder and liquid material, in which:
The solid powder, it is by mass percentage, composed of the following components: red mud 10wt%, 42.5# normal silicate
Cement 5wt%, flyash 4wt%, iron tailings 80wt%, FDN water-reducing agent 1wt%；
The aqueous solution of the alkali-activator, it is by mass percentage, composed of the following components: sodium metasilicate 23wt% and water
77wt%；
The mass ratio of the solid powder and liquid material is 100:18；
The preparation method is the same as that of Example 1 for the present embodiment.
Embodiment 8
A kind of composite gelled material for 3D printing building, according to the mass fraction, the composite gelled material include solid
Body powder and liquid material, in which:
The solid powder, it is by mass percentage, composed of the following components: red mud 25wt%, 42.5# normal silicate
Cement 10wt%, flyash 4wt%, iron tailings 60wt%, FDN water-reducing agent 1wt%；
The aqueous solution of the alkali-activator, it is by mass percentage, composed of the following components: sodium metasilicate 23wt% and water
77wt%；
The mass ratio of the solid powder and liquid material is 100:18；
The preparation method is the same as that of Example 1 for the present embodiment.
Embodiment 9
A kind of composite gelled material for 3D printing building, according to the mass fraction, the composite gelled material include solid
Body powder and liquid material, in which:
The solid powder, it is by mass percentage, composed of the following components: red mud 20wt%, 42.5# normal silicate
Cement 12wt%, pulverized limestone 9wt%, nickel tailing 58wt%, FDN water-reducing agent 1wt%；
The aqueous solution of the alkali-activator, it is by mass percentage, composed of the following components: sodium metasilicate 23wt% and water
77wt%；
The mass ratio of the solid powder and liquid material is 100:18；
The preparation method of the above-mentioned composite gelled material for 3D printing building, comprising the following steps:
(a), red mud, hydraulic cement material, admixture aggregate and FDN water-reducing agent are mixed, obtains solid powder；
(b), the aqueous solution of the solid powder and alkali-activator that obtain step (a) mixes, and obtains composite gelled material.
Embodiment 10
A kind of composite gelled material for 3D printing building, according to the mass fraction, the composite gelled material include solid
Body powder and liquid material, in which:
The solid powder, it is by mass percentage, composed of the following components: red mud 20wt%, 42.5# normal silicate
Cement 5wt%, steel-making Water Quenching Slag 20wt%, river sand 54wt%, FDN water-reducing agent 1wt%；
The aqueous solution of the alkali-activator, it is by mass percentage, composed of the following components: sodium metasilicate 23wt% and water
77wt%；
The mass ratio of the solid powder and liquid material is 100:18；
The preparation method of the above-mentioned composite gelled material for 3D printing building, comprising the following steps:
(a), red mud, hydraulic cement material, admixture aggregate and FDN water-reducing agent are mixed, obtains solid powder；
(b), the aqueous solution of the solid powder and alkali-activator that obtain step (a) mixes, and obtains composite gelled material.
Experimental example 1
Have the effect of improving the compressive property of 3D printing building to show composite gelled material of the present invention not only, and
The problem of it is bad that existing cement-based material thixotropy can also be effectively relieved, 3D printing can not be applied to.It is existing special by present invention implementation
The composite gelled material that example 1~10 is prepared carries out resistance to compression, the detection of flexural strength, and result is as shown in table 1 below:
Table 1: the detection data of 1~10 composite gelled material of the embodiment of the present invention
It follows that water is greatly reduced by way of adding red mud in the composite gelled material that the present invention is prepared
The dosage of rigid glue, and condensate not only improves the compressive property of 3D printing building, and resistance to compression, the anti-folding for increasing 3D printing building are strong
Degree, but also it has been effectively relieved that existing cement-based material thixotropy is bad, and setting time is slower, asking for 3D printing can not be applied to
Topic.Meanwhile turning waste into wealth and also reducing the cost of 3D printing building.The especially gelling that is prepared of the embodiment of the present invention 1~5
Material, 28 days compression strength >=32.5MPa, 28 days flexural strength >=8.3MPa.
Experimental example 2
Have the characteristics that use is safe to show that composite gelled material is prepared in the present invention, now prepares Examples 1 to 5
Obtained composite gelled material carries out Leaching detection, and refers to U.S.'s hazardous waste judging standard (EPA TCLP) and China
The limit value of standards for drinking water quality (GB 5749-2006) is compared, and the results are shown in Table 2:
Table 2: 1~5 composite gelled material Leaching testing result of the embodiment of the present invention
As seen from the above table, the composite gelled material that the application is prepared does not have Leaching.Although in Examples 1 to 5
Arsenic, mercury and lead content be slightly above the limit value of GB 5749-2006, but GB 5749-2006 is actually a kind of drinking water quality
Standard, limit value are extremely low.And the supervision limitation of EPA TCLP is more suitable for As, Ba, Cd, Cr, Pb, Hg in evaluation cementitious material
Equal Heavy Metals residual, to verify the extraction toxicity of solid waste.As above-mentioned table 2 it is found that made from Examples 1 to 5
Composite gelled material, As, Ba, Cd, Cr, Pb, Hg content are far below the limit value of EPA TCLP, and the content of especially mercury is only
The limit between 0.0015~0.002, far below 0.2mg/L.Analysis by EPA to mercury, it is believed that the application is prepared into
The composite gelled material Leaching of Heavy Metals content arrived is extremely low, environmental sound.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of composite gelled material, which is characterized in that the composite gelled material includes solid powder and liquid material, wherein
The solid powder includes red mud, hydraulic cement material, admixture, aggregate and water-reducing agent；
The liquid material includes the aqueous solution of alkali-activator.
2. composite gelled material according to claim 1, which is characterized in that the solid powder, by mass percentage,
Mainly consist of the following components: 15~25wt% of red mud, 0~7wt% of hydraulic cement material, 9~25wt% of admixture, aggregate 45
1~5wt% of~75wt% and water-reducing agent.
3. composite gelled material according to claim 1, which is characterized in that the aqueous solution of the alkali-activator, by quality
Percentages, mainly consist of the following components: 75~80wt% of 20~25wt% of alkali-activator and water；
Preferably, the aqueous solution of the alkali-activator, by mass percentage, mainly consist of the following components: alkali-activator 22
76~78wt% of~24wt% and water；
It is furthermore preferred that the alkali-activator is sodium metasilicate.
4. composite gelled material according to claim 1, which is characterized in that the mass ratio of the solid powder and liquid material
For (80~120): (16~20), preferably 100:(16~20).
5. composite gelled material according to any one of claims 1 to 4, which is characterized in that the hydraulic cement material packet
Include at least one of portland cement, sulphate aluminium cement and ferrous aluminate cement；
Preferably, the hydraulic cement material is 42.5# ordinary portland cement.
6. composite gelled material according to any one of claims 1 to 4, which is characterized in that the admixture includes fine coal
At least one of ash, pulverized limestone and steel-making Water Quenching Slag；
Preferably, the admixture is flyash；
Preferably, the aggregate includes at least one of iron tailings, nickel tailing, copper tailing and river sand；
It is furthermore preferred that the aggregate is iron tailings.
7. composite gelled material according to any one of claims 1 to 4, which is characterized in that the water-reducing agent includes naphthalene system
At least one of water-reducing agent, preferably FDN water-reducing agent.
8. a kind of preparation method of composite gelled materials described in any item according to claim 1~7, which is characterized in that described
Preparation method the following steps are included:
Solid powder and liquid material are uniformly mixed, composite gel material is obtained.
9. the preparation method of composite gelled material according to claim 8, which is characterized in that the preparation method include with
Lower step:
(a), red mud, hydraulic cement material, admixture aggregate and water-reducing agent are mixed, obtains solid powder；
(b), alkali-activator is dissolved in the water, obtains liquid material；
(c), the solid powder that step (a) obtains and the liquid material that step (b) obtains are mixed, obtains composite gelled material；
The sequence interchangeable of the step (a) and step (b)；
It preferably, further include by red mud, hydraulic cement material, admixture and aggregate point before the step (a) prepares mixed powder
The step of not crushed.
10. a kind of application of composite gelled materials described in any item according to claim 1~7 in preparation 3D printing building.
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| CN113087488A (en) * | 2020-01-08 | 2021-07-09 | 香港理工大学深圳研究院 | 3D printing material and preparation method thereof |
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