CN106866075A - A kind of large-doping-amount fly ash cement based composites of superhigh tenacity and preparation method thereof - Google Patents
A kind of large-doping-amount fly ash cement based composites of superhigh tenacity and preparation method thereof Download PDFInfo
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- CN106866075A CN106866075A CN201710116954.2A CN201710116954A CN106866075A CN 106866075 A CN106866075 A CN 106866075A CN 201710116954 A CN201710116954 A CN 201710116954A CN 106866075 A CN106866075 A CN 106866075A
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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
- C04B28/04—Portland cements
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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
- 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
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. fly ash
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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
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention discloses the large-doping-amount fly ash cement based composites and preparation method of a kind of superhigh tenacity, the large-doping-amount fly ash cement based composites of the superhigh tenacity are calculated by weight, it is made up of 554 parts of Binder Materials, 167 parts of sands, 141 parts of waterglass, 31 parts of NaOH, 108 parts of water, 14 parts of PVA fibers, wherein Binder Materials is by high-calcium fly ass：Class F fly ash：Cement is 4 in mass ratio:1:0 2.1 ratio is well mixed to be formed.Its preparation method will NaOH and water be mixed and stirred for dissolving, add waterglass, obtain exciting agent solution；Added after gel rubber material and sand are mixed and excite agent solution, added PVA fibers and continue to stir up to PVA fibers are uniformly dispersed, obtain final product the large-doping-amount fly ash cement based composites of superhigh tenacity.It makes use of substantial amounts of flyash, so as to reducing energy consumption, reduce environmental pollution and improve the utilization rate of industrial residue.
Description
Technical field
The invention belongs to materialogy field, it is related to a kind of superhigh tenacity pulverized fuel ash cement based composites, specifically one
Plant large-doping-amount fly ash cement based composites of superhigh tenacity and preparation method thereof.
Background technology
The big academician in Wuzhong proposes the concept of " green concrete " within 1998.It points out that sustainable development is the most urgent mankind
The problem cut.China must walk green concrete road, and green concrete is to economize on resources and environmentally friendly sustainable development
The construction material of exhibition, its marrow is environmental protection and sustainable development.
In past a century and a half, concrete is simple by materials simplicity, technique as important civil engineering material
Just, many advantages, such as low cost, strong adaptability, compression strength high, application amount is increasing, and range of application is also more and more extensive.
But, because the tensile strength of concrete itself is low, from the intrinsic weakness such as great, fragility is big, adds concrete structure and building
With easily occur during use in various degree and multi-form crack, and concrete energy consumption is larger, and environmental pollution seriously etc. is asked
Topic, governs the application of this construction material of concrete.University of Michigan of U.S. Victor Li professors and Massachusetts Polytechnics
Christopher Leung teach and were delivered in U.S. ASCE Journal of Engineering Mechanics in 1992
Paper establish fiber reinforced cement-based composite material (Engineered Cementitious Composites, ECC)
Micromechanics basis and design criteria, thereafter all over the world researcher to ECC materials and its application start in-depth study.
This gives people a new enlightenment, and fiber reinforcement its toughness can be added in Binder Materials.
Because flyash is used as industrial residue, in recent years in the world to flyash as composite, patching material, building
The aspects such as material expand substantial amounts of research.But, the raising of flyash consumption causes the reduction of its intensity in cement-based material,
This severely limits it in the extensive use for needing certain bearing capacity, require reliability High-tech Material field high.
In consideration of it, by the theoretical inspirations of ECC, the present invention is intended to prepare a kind of fiber reinforcement type superhigh tenacity flyash in great mixed amount water
Cement-based composite material, this composite is not only environmentally friendly, and many advantages, such as with excellent toughness, has in engineering extensive
Application prospect.
The content of the invention
An object of the present invention is to solve that above-mentioned large-doping-amount fly ash cement base stock stiffness is low, fragility big, splitting
Seam control ability difference etc. technical problem and provide a kind of large-doping-amount fly ash cement based composites of superhigh tenacity, the superelevation
Toughness large-doping-amount fly ash cement based composites have the features such as intensity is big, toughness is high.
The second object of the present invention is to provide a kind of system of above-mentioned superhigh tenacity large-doping-amount fly ash cement based composites
Preparation Method, the features such as the preparation method has technological process simple, good product quality.
Technical scheme
A kind of large-doping-amount fly ash cement based composites of superhigh tenacity, calculate by weight, its raw material composition and
Under content：
Described Binder Materials, is formed by high-calcium fly ass, Class F fly ash, cement mixing, is calculated in mass ratio, high calcium
Flyash：Class F fly ash：Cement is 4:1:0-2.1；
Wherein：Class F fly ash is I grades of Class F fly ash, and meso-position radius D50 is 4.73 μm；
High-calcium fly ass is I grades of high-calcium fly ass, and meso-position radius D50 is 19.45 μm；
Cement is the type portland cements of PII 52.5；
Described sand is the quartz sand of 30-100 mesh, and maximum particle diameter is no more than 0.6mm；
Described waterglass, modulus is 3.3, and Baume degrees is 40；
Described NaOH is that content is 99% alkaline NaOH；
Described PVA fibers, its length is 12mm, and a diameter of 39 μm, tensile strength is 1600Mpa, elastic modelling quantity
42.8Gpa。
A kind of preparation method of the large-doping-amount fly ash cement based composites of above-mentioned superhigh tenacity, specifically includes following
Step：
(1) NaOH crystal and water, are mixed and stirred for dissolving, NaOH solution is obtained, waterglass is subsequently adding, are excited
Agent solution；
(2), gel rubber material and sand are poured into cement mortar mixer in revolution 57-67r/min, rotation 135-
Dry 2~the 4min that stirs is to well mixed under conditions of 145r/min；
Described Binder Materials is to carry out well mixed forming by Class F fly ash, high-calcium fly ass and cement；
Then the agent solution that excites obtained by step (1) is added in cement mortar mixer, in revolution 115-135r/
Min, stirs 3~5min under conditions of rotation 275-295r/min；
PVA fibers are subsequently adding, continue to stir 5 in revolution 115-135r/min, under conditions of rotation 275-295r/min
~8min, until PVA fibers are uniformly dispersed, obtains final product the large-doping-amount fly ash cement based composites of superhigh tenacity.
Technique effect of the invention
The large-doping-amount fly ash cement based composites of a kind of superhigh tenacity of the invention, due to make use of substantial amounts of fine coal
Ash consumes the existing industrial residue for being harmful to environment, reduces the carbon emission of cement and its compound as raw material, makes
Obtain the based composites more greenization of superhigh tenacity large-doping-amount fly ash cement.
Further, the large-doping-amount fly ash cement based composites of a kind of superhigh tenacity of the invention, after testing, it is in 7d
When mean stress can reach 2.07-2.37MPa, mean strain can reach 3.51-4.57%, thus superhigh tenacity large dosage
Pulverized fuel ash cement based composites have the features such as intensity is big, toughness is high.
Further, the preparation method of the large-doping-amount fly ash cement based composites of a kind of superhigh tenacity of the invention, by
Only need to mix raw material in whole preparation process, and the whipping process used time is only 10~17min, i.e., common concrete is stirred
The need for mixing equipment can meet preparation, and the strain of resulting materials is above 3.5%, therefore the preparation method has flow letter
The features such as good product quality of single, final gained.
Brief description of the drawings
A kind of stress of the large-doping-amount fly ash cement based composites of the superhigh tenacity obtained by Fig. 1, embodiment 1-3-should
Become schematic diagram.
Specific embodiment
The present invention is expanded on further below by specific embodiment and with reference to accompanying drawing, but is not intended to limit the present invention.
Equipment and raw material information used in the present invention refer to table 1：
Equipment and raw material used in table 1
Embodiment 1
A kind of large-doping-amount fly ash cement based composites of superhigh tenacity, calculate by weight, its raw material composition and
Under content：
Described Binder Materials, by high-calcium fly ass, Class F fly ash and cement carry out it is well mixed form, in mass ratio
Calculate, high-calcium fly ass：Class F fly ash：Cement is 4:1:2.1；
Wherein：Class F fly ash is one-level Class F fly ash, and meso-position radius D50 is 4.73 μm；
High-calcium fly ass is one-level high-calcium fly ass, and meso-position radius D50 is 19.45 μm；
Cement is the type portland cements of PII 52.5；
Described sand is the quartz sand of 30-100 mesh, and maximum particle diameter is no more than 0.6mm；
Described waterglass, modulus is 3.3, and Baume degrees is 40；
Described NaOH is that content is 99% alkaline NaOH；
Described PVA fibers, its length is 12mm, and a diameter of 39 μm, tensile strength is 1600Mpa, elastic modelling quantity
42.8Gpa。
A kind of preparation method of the large-doping-amount fly ash cement based composites of above-mentioned superhigh tenacity, specifically includes following
Step：
(1) NaOH and water, are mixed and stirred for dissolving, NaOH solution is obtained, waterglass is subsequently adding, exciting agent is obtained molten
Liquid；
(2), gel rubber material and sand are poured into cement mortar mixer in revolution 57-67r/min, rotation 135-
Dry 2~the 4min that stirs is to well mixed under conditions of 145r/min；
Described Binder Materials is to carry out well mixed forming by Class F fly ash, high-calcium fly ass and cement；
Then the agent solution that excites obtained by step (1) is added in cement mortar mixer, in revolution 115-135r/
Min, stirs 3~5min under conditions of rotation 275-295r/min；
PVA fibers are subsequently adding, continue to stir 5 in revolution 115-135r/min, under conditions of rotation 275-295r/min
~8min, until PVA fibers are uniformly dispersed, obtains final product the large-doping-amount fly ash cement based composites of superhigh tenacity.
Embodiment 2
A kind of large-doping-amount fly ash cement based composites of superhigh tenacity, calculate by weight, its raw material composition and
Under content：
Described Binder Materials, by high-calcium fly ass, Class F fly ash and cement carry out it is well mixed form, in mass ratio
Calculate, high-calcium fly ass：Class F fly ash：Cement is 4:1:0.9；
Wherein：Class F fly ash is I grades of Class F fly ash, and meso-position radius D50 is 4.73 μm；
High-calcium fly ass is I grades of high-calcium fly ass, and meso-position radius D50 is 19.45 μm；
Cement is the type portland cements of PII 52.5；
Described sand is the quartz sand of 30-100 mesh, and maximum particle diameter is no more than 0.6mm；
Described waterglass, modulus is 3.3, and Baume degrees is 40；
Described NaOH is that content is 99% alkaline NaOH；
Described PVA fibers, its length is 12mm, and a diameter of 39 μm, tensile strength is 1600Mpa, elastic modelling quantity
42.8Gpa。
A kind of preparation method of the large-doping-amount fly ash cement based composites of above-mentioned superhigh tenacity, specific steps are with real
Apply example 1.
Embodiment 3
A kind of large-doping-amount fly ash cement based composites of superhigh tenacity, calculate by weight, its raw material composition and
Under content：
Described Binder Materials, by high-calcium fly ass, Class F fly ash and cement carry out it is well mixed form, in mass ratio
Calculate, high-calcium fly ass：Class F fly ash：Cement is 4:1:0；
Wherein：Class F fly ash is I grades of Class F fly ash, and meso-position radius D50 is 4.73 μm；
High-calcium fly ass is I grades of high-calcium fly ass, and meso-position radius D50 is 19.45 μm；
Cement is the type portland cements of PII 52.5；
Described sand is the quartz sand of 30-100 mesh, and maximum particle diameter is no more than 0.6mm；
Described waterglass, modulus is 3.3, and Baume degrees is 40；
Described NaOH is that content is 99% alkaline NaOH；
Described PVA fibers, its length is 12mm, and a diameter of 39 μm, tensile strength is 1600Mpa, elastic modelling quantity
42.8Gpa。
A kind of preparation method of the large-doping-amount fly ash cement based composites of above-mentioned superhigh tenacity, specific steps are with real
Apply example 1.
By the large-doping-amount fly ash cement based composites of the superhigh tenacity obtained by above-described embodiment 1-3 in outdoor maintenance 7d
Afterwards, tensile test is carried out on electronic tension tester, while carry out Real-time Collection to experimental data, and stress-should is drawn out
Become relation curve, as can be seen that with cement in the large-doping-amount fly ash cement based composites of superhigh tenacity in experimentation
Reduction, the stress of test specimen has and slightly reduces, but strain improves.The curves of stress-strain relationship result of gained
As shown in Figure 1, from figure 1 it appears that mean stress of the test specimen of embodiment 1 in 7d can reach 2.37MPa, mean strain can
Reach 3.51%.Mean stress of the test specimen of embodiment 2 in 7d can reach 2.19MPa, and mean strain can reach 3.95%.Implement
Mean stress of the test specimen of example 3 in 7d can reach 2.07MPa, and mean strain can reach 4.57%.
In sum, a kind of large-doping-amount fly ash cement based composites of superhigh tenacity that the present invention is provided have intensity
Greatly, the features such as toughness is high, the features such as the preparation method has flow simple, good product quality.
The above is only the citing of embodiments of the present invention, it is noted that for the ordinary skill of the art
For personnel, on the premise of the technology of the present invention principle is not departed from, some improvement and modification can also be made, these improve and become
Type also should be regarded as protection scope of the present invention.
Claims (7)
1. large-doping-amount fly ash cement based composites of a kind of superhigh tenacity, it is characterised in that the big of described superhigh tenacity is mixed
Amount pulverized fuel ash cement based composites are calculated by weight, and its raw material composition and content are as follows：
554 parts of Binder Materials
167 parts of sand
141 parts of waterglass
31 parts of NaOH
108 parts of water
14 parts of PVA fibers；
Described Binder Materials, by high-calcium fly ass, Class F fly ash and cement carry out it is well mixed form, count in mass ratio
Calculate, high-calcium fly ass：Class F fly ash：Cement is 4:1:0-2.1；
Wherein：Class F fly ash isLevel Class F fly ash, meso-position radius D50 is 4.73 μm；
High-calcium fly ass isLevel high-calcium fly ass, meso-position radius D50 is 19.45 μm；
Cement is the type portland cements of PII 52.5；
Described sand is the quartz sand of 30-100 mesh, and maximum particle diameter is no more than 0.6mm；
Described waterglass, modulus is 3.3, and Baume degrees is 40；
Described NaOH is that content is 99% alkaline NaOH；
Described PVA fibers, its length is 12mm, and a diameter of 39 μm, tensile strength is 1600Mpa, elastic modelling quantity 42.8Gpa.
2. a kind of large-doping-amount fly ash cement based composites of superhigh tenacity as claimed in claim 1, it is characterised in that institute
The Binder Materials stated, by high-calcium fly ass, Class F fly ash and cement carry out it is well mixed form, calculate in mass ratio, high calcium
Flyash：Class F fly ash：Cement is 4:1:0-0.9.
3. a kind of large-doping-amount fly ash cement based composites of superhigh tenacity as claimed in claim 2, it is characterised in that institute
The Binder Materials stated, by high-calcium fly ass, Class F fly ash and cement carry out it is well mixed form, calculate in mass ratio, high calcium
Flyash：Class F fly ash：Cement is 4:1:0.9.
4. a kind of large-doping-amount fly ash cement based composites of superhigh tenacity as claimed in claim 2, it is characterised in that institute
The Binder Materials stated, by high-calcium fly ass, Class F fly ash and cement carry out it is well mixed form, calculate in mass ratio, high calcium
Flyash：Class F fly ash：Cement is 4:1:0.
5. a kind of large-doping-amount fly ash cement based composites of superhigh tenacity as claimed in claim 1, it is characterised in that institute
The Binder Materials stated, by high-calcium fly ass, Class F fly ash and cement carry out it is well mixed form, calculate in mass ratio, high calcium
Flyash：Class F fly ash：Cement is 4:1:0.9-2.1.
6. a kind of large-doping-amount fly ash cement based composites of superhigh tenacity as claimed in claim 5, it is characterised in that institute
The Binder Materials stated, by high-calcium fly ass, Class F fly ash and cement carry out it is well mixed form, calculate in mass ratio, high calcium
Flyash：Class F fly ash：Cement is 4:1:2.1.
7. the preparation method of the large-doping-amount fly ash cement based composites of a kind of superhigh tenacity as claimed in claim 1, its
It is characterised by specifically including following steps：
（1）, by NaOH crystal and water be mixed and stirred for dissolving, obtain NaOH solution, be subsequently adding waterglass, obtain exciting agent molten
Liquid；
（2）, by gel rubber material and sand pour into cement mortar mixer revolution 57-67r/min, rotation 135-145r/min
Under conditions of the dry 2~4min that stirs to well mixed；
Described Binder Materials is to carry out well mixed forming by Class F fly ash, high-calcium fly ass and cement；
Then by step（1）The agent solution that excites of gained is added in cement mortar mixer, in revolution 115-135r/min, oneself
Turn to stir 3~5min under conditions of 275-295r/min；
Be subsequently adding PVA fibers, revolution 115-135r/min, under conditions of rotation 275-295r/min continue stir 5~
8min, until PVA fibers are uniformly dispersed, obtains final product the large-doping-amount fly ash cement based composites of superhigh tenacity.
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| CN109336637A (en) * | 2018-12-22 | 2019-02-15 | 中国地质大学（武汉） | Foam concrete and preparation method based on the compound glue material of silicate-alumino-silicate |
| CN110218037A (en) * | 2019-07-08 | 2019-09-10 | 山东创能机械科技有限公司 | A kind of wet ash discharge base filler and its preparation method and application |
| CN111153640A (en) * | 2020-01-09 | 2020-05-15 | 辽东学院 | Preparation method of large-volume fly ash fiber reinforced cement-based composite material |
| CN115504729A (en) * | 2021-06-22 | 2022-12-23 | 国家能源投资集团有限责任公司 | Cementing material composition, cementing material, preparation method and application thereof |
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| CN110218037A (en) * | 2019-07-08 | 2019-09-10 | 山东创能机械科技有限公司 | A kind of wet ash discharge base filler and its preparation method and application |
| CN110218037B (en) * | 2019-07-08 | 2021-10-08 | 山东创能机械科技有限公司 | Wet ash-discharging base filling material and preparation method and application thereof |
| CN111153640A (en) * | 2020-01-09 | 2020-05-15 | 辽东学院 | Preparation method of large-volume fly ash fiber reinforced cement-based composite material |
| CN115504729A (en) * | 2021-06-22 | 2022-12-23 | 国家能源投资集团有限责任公司 | Cementing material composition, cementing material, preparation method and application thereof |
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Application publication date: 20170620 |