CN106830871A - The fibre-reinforced superhigh tenacity geopolymer based composites of PVA and preparation method - Google Patents
The fibre-reinforced superhigh tenacity geopolymer based composites of PVA and preparation method Download PDFInfo
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- CN106830871A CN106830871A CN201710063215.1A CN201710063215A CN106830871A CN 106830871 A CN106830871 A CN 106830871A CN 201710063215 A CN201710063215 A CN 201710063215A CN 106830871 A CN106830871 A CN 106830871A
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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
- C04B28/006—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 mineral polymers, e.g. geopolymers of the Davidovits type
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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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/10—Clay
- C04B14/106—Kaolin
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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
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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)
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- Ceramic Engineering (AREA)
- Environmental & Geological Engineering (AREA)
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- Organic Chemistry (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
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- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides a kind of fibre-reinforced superhigh tenacity geopolymer based composites of PVA, it is made up of the sodium metasilicate of the Class F fly ash of 542 weight portions, the high-calcium fly ass of 136 weight portions, the metakaolin of 0 ~ 20 weight portion, the quartz sand of 183 ~ 203 weight portions, the water of 160 weight portions, the NaOH of 38 weight portions, the vinal of 14 ~ 17 weight portions and 173 weight portions.Present invention also offers the preparation method of above-mentioned superhigh tenacity geopolymer based composites; the present invention replaces cement using substantial amounts of industrial residue flyash, and trade waste is turned waste into wealth, and is effectively protected environment; the consumption of the energy is reduced, the discharge of carbon dioxide is reduced.The toughness of geopolymer based composites using PVA fiber reinforcements, compensate for the shortcoming of traditionally polymer matrix composite poor ductility, consequently facilitating popularization and application of the geopolymer based composites in China's engineering field.
Description
Technical field
The invention belongs to materialogy field, it is related to a kind of composite material for building, specifically a kind of PVA fiber reinforcements
Superhigh tenacity geopolymer based composites and preparation method.
Background technology
Geopolymer is one kind with inorganic [SiO4]、[AlO4] tetrahedron is main composition, with the network-like key of space three-dimensional
The novel inorganic sa Binder Materials of binding structure.Compared with conventional cement sill, its raw material sources is extensive, and preparation side
Just, energy consumption is small, CO2Discharge capacity is low, while having high-early-strength, high-strength, impervious, freeze proof, high-ductility, corrosion-resistant, fire resisting and consolidating
The excellent properties such as envelope heavy metal, make its particularly repairing rush construction engineering in engineering obtain good application.But, due to ground
The intrinsic weakness such as polymeric material itself tensile strength is low, fragility is big, easily occur during construction and use in various degree and
The crack of multi-form, governs promoting the use of for this material.
Therefore in order to strengthen the intensity and toughness of geopolymer, Davidovits between 1989 to 1994 respectively
With glass fibre, carbon fiber and silicon carbide fibre toughness reinforcing geopolymer, make its bending strength respectively reached 140MPa,
175MPa, 220MPa, especially with the geopolymer composite of fibre reinforced, it does not aoxidized at 1000 DEG C it is indeformable,
Mechanical property is basicly stable.It is 2% that D.M.Ryo used heat pressing process that porosity has been obtained in 1976, and compression strength is 650MPa
Rocks gel.The scientist of Italy is then added to fibrillation polypropylene net in ground polymer material and successfully prepares lightweight
Top board；Mirror U.S.A of Japan with the addition of PVA, manufacture artificial marble.
But because the condensation of geopolymer gelling system, hardening mechanism have very big difference with common portland cement,
Many factors all affect the intensity of the composite during early reaction, such as：Silica alumina ratio, alkali in solid mixture swash
Hair agent content and curing condition etc..Therefore the optimum mix proportion and optimum reaction condition of the material are sought, to the composite
Popularization and application are significant.
The content of the invention
For above-mentioned technical problem of the prior art, it is polymerized the invention provides a kind of enhanced superhigh tenacities of PVA
Thing based composites and preparation method, the enhanced superhigh tenacity geopolymer based composites of described this PVA and preparation side
Method to solve concrete tensile strength of the prior art it is low, from great, fragility is big, the technology that the ability of control critical eigenvalue is poor is asked
Topic.
The invention provides a kind of enhanced superhigh tenacity geopolymer based composites of PVA, by Class F fly ash, high calcium
Flyash, NaOH, quartz sand, sodium metasilicate, water, metakaolin and vinal composition, the parts by weight of each component
It is as follows：
542 parts of Class F fly ash；
136 parts of high-calcium fly ass；
183 ~ 203 parts of quartz sand；
0 ~ 20 part of metakaolin；
160 parts of water；
38 parts of NaOH；
173 parts of sodium metasilicate；
14 ~ 17 parts of vinal；
Further, described Class F fly ash powder is one-level Class F fly ash powder, and meso-position radius (D50) are 4.732 μm.
Further, described high-calcium fly ass is one-level high-calcium fly ass, and meso-position radius (D50) are 19.45 μm.
Further, described quartz sand is the quartz sand of 30 ~ 100 mesh, and maximum particle diameter is no more than 0.6mm.
Further, described metakaolin meso-position radius（D50）It is 5.210 μm.
Further, described NaOH is that purity is 98% graininess NaOH.
Further, described sodium metasilicate is the liquid sodium silicate of 3.3 moulds.
Further, described vinal length is 12mm, and a diameter of 39 μm, tensile strength is 1620MPa, bullet
Property modulus be 42.8GPa.
Present invention also offers a kind of preparation side of the above-mentioned enhanced superhigh tenacity geopolymer based composites of PVA
Method, it is characterised in that comprise the following steps：
1) each reactive material is weighed according to parts by weight；
2) Class F fly ash, high-calcium fly ass, metakaolin, quartz sand are added in agitated kettle, in the 62 ± 5r/min that revolves round the sun,
It is dry under conditions of 140 ± 5r/min of rotation to stir 2~4 minutes to uniform；
3) by water, sodium metasilicate, NaOH, mixing and stirring is made alkali-activator in a reaction vessel；
4) alkali-activator is added to step 1）Agitated kettle in, revolve round the sun 125 ± 10r/min, 285 ± 10r/min's of rotation
Under the conditions of stir 3~5 minutes；
5) vinal is added, is stirred for 5 ~ 8 minutes, until fiber is uniformly dispersed, that is, obtain described PVA fiber reinforcements
Superhigh tenacity geopolymer based composites.
The present invention is recycled discarded industrial residue flyash in high tenacity geopolymer based composites field,
It is effective to consume industrial residue, and the consumption of the energy is reduced, give full play to industrial residue effect, solve flyash pair
The problem of environmental pollution, while the source of superhigh tenacity geopolymer based composites raw material is increased, in order to preferably push away
Wide application, reduces CO2 emission, reduces environmental pollution.
The present invention is compared with prior art, and its technological progress is significant.The fibre-reinforced superhigh tenacities of PVA of the invention
Geopolymer based composites have the advantages that：
1. material property is good：
3d material properties of the invention are：Tensile strength：2.2MPa, limiting strain：6.8%；7d material properties are：Tensile strength：
3.7MPa, limiting strain：6.4%；28d material properties are：Tensile strength：3.7MPa, limiting strain is 5.2%.
2. low cost：
The fibre-reinforced superhigh tenacity geopolymer based composites of PVA of the invention, combine geopolymer based composites
Advantage, a large amount of cheap flyash and metakaolin are with the addition of in the feed, on the one hand can react generation using alkali-activated carbonatite
The adhesive property of the polymer of stable performance, optimization matrix material and vinal, it is ensured that the high tenacity of material, it is another
Aspect flyash and metakaolin source more extensively, reduce the price of raw material.It is demonstrated experimentally that PVA enhancings of the invention
Superhigh tenacity geopolymer based composites there is superhigh tenacity and intensity, compensate for traditionally polymer matrix composite and prolong
The shortcoming of malleability difference, consequently facilitating popularization and application of the geopolymer based composites in China's engineering field.
Brief description of the drawings
Fig. 1 be the superhigh tenacity geopolymer based composites that the flyash of example 1 and metakaolin are mixed again stress-should
Change and age relation contrast schematic diagram.
Fig. 2 is that the superhigh tenacity geopolymer based composites single shaft that the flyash of example 1 and metakaolin are mixed again is direct
Multiple crack growth schematic diagram after stretching.
Specific embodiment
Embodiment 1：
Class F fly ash：542 parts, high-calcium fly ass：136 parts, quartz sand：182.7 parts, sodium metasilicate：173 parts, NaOH：38
Part, water：160 parts, fiber：14 parts, metakaolin：20.3 parts.
The match ratio produces metakaolin using one-level high-calcium fly ass, one-level Class F fly ash and the Inner Mongol, and solid is mixed
Compound is added in agitated kettle, at a slow speed（Revolution 62 ± 5 r/min, the r/min of rotation 140 ± 5）It is dry to stir 3 minutes to uniform.Again will
The alkali-activator for preparing is dissolved in water and adds agitated kettle, stirs soon（Revolution 125 ± 10 r/min, the r/min of rotation 285 ± 10）5 points
Clock, adds the fiber of the ratio, is stirred for 6 minutes, until vinal is uniformly dispersed, that is, obtains described PVA and increases
Strong superhigh tenacity geopolymer based composites slurry, finally inserts die for molding by slurry, and 2 are conserved in 80 DEG C of baking ovens
Hour, then normal temperature maintenance shaping.
Described fine aggregate is formed by river sand screening, and maximum particle diameter is no more than 0.6mm.Described alkali-activator is for purity
98% NaOH is formulated with the sodium metasilicate of 3.3 moulds.
3d material properties are as follows：Tensile strength is 2.2MPa, and limiting strain is 6.8%；7d material properties are as follows：Tension is strong
It is 3.7MPa to spend, and limiting strain is 6.4%；The performance of 28d materials is as follows：Tensile strength is 3.7MPa, and limiting strain is 5.2%.
Embodiment 2：
Class F fly ash：542 parts, high-calcium fly ass：136 parts, quartz sand：203 parts, sodium metasilicate：173 parts, NaOH：38
Part, water：160 parts, fiber：15.6 parts, metakaolin：0 part.
The match ratio uses one-level high-calcium fly ass, one-level Class F fly ash, and solid mixture is added in agitated kettle,
At a slow speed（Revolution 62 ± 5 r/min, the r/min of rotation 140 ± 5）It is dry to stir 3 minutes to uniform.The alkali-activator that will be prepared again is dissolved in
Water adds agitated kettle, stirs soon（Revolution 125 ± 10 r/min, the r/min of rotation 285 ± 10）5 minutes, add the fibre of the ratio
Dimension, is stirred for 6 minutes, until vinal is uniformly dispersed, that is, obtains the described enhanced superhigh tenacity geopolymers of PVA
Based composites slurry, finally inserts die for molding by slurry, is conserved 2 hours in 80 DEG C of baking ovens, then normal temperature maintenance shaping.
Described fine aggregate is formed by river sand screening, and maximum particle diameter is no more than 0.6mm.Described alkali-activator is for purity
98% NaOH is formulated with the sodium metasilicate of 3.3 moulds.
3d material properties are as follows：Tensile strength is 3.2MPa, and limiting strain is 7.0%；7d material properties are as follows：Tension is strong
It is 3.6MPa to spend, and limiting strain is 5.4%；The performance of 28d materials is as follows：Tensile strength is 4.5MPa, and limiting strain is 4.7%.
Embodiment 3：
Class F fly ash：542 parts, high-calcium fly ass：136 parts, quartz sand：192.9 parts, sodium metasilicate：173 parts, NaOH：38
Part, water：160 parts, fiber：17 parts, metakaolin：10.2 parts.
The match ratio produces metakaolin using one-level high-calcium fly ass, one-level Class F fly ash and the Inner Mongol, and solid is mixed
Compound is added in agitated kettle, at a slow speed（Revolution 62 ± 5 r/min, the r/min of rotation 140 ± 5）It is dry to stir 3 minutes to uniform.Again will
The alkali-activator for preparing is dissolved in water and adds agitated kettle, stirs soon（Revolution 125 ± 10 r/min, the r/min of rotation 285 ± 10）5 points
Clock, adds the fiber of the ratio, is stirred for 6 minutes, until vinal is uniformly dispersed, that is, obtains described PVA and increases
Strong superhigh tenacity geopolymer based composites slurry, finally inserts die for molding by slurry, and 2 are conserved in 80 DEG C of baking ovens
Hour, then normal temperature maintenance shaping.
Described fine aggregate is formed by river sand screening, and maximum particle diameter is no more than 0.6mm.Described alkali-activator is for purity
98% NaOH is formulated with the sodium metasilicate of 3.3 moulds.
3d material properties are as follows：Tensile strength is 2.4MPa, and limiting strain is 4.8%；7d material properties are as follows：Tension is strong
It is 5.1MPa to spend, and limiting strain is 5.1%；28d material properties are as follows：Tensile strength is 3.4MPa, and limiting strain is 5.9%.
The above is only the preferred embodiment of the present invention, it should be pointed out that：For the those of ordinary skill of technical field
For, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (9)
1. fibre-reinforced superhigh tenacity geopolymer based composites of a kind of PVA, it is characterised in that：By Class F fly ash, height
Calcium fly ash, quartz sand, metakaolin, water, NaOH, sodium metasilicate and vinal composition, the weight portion of each component
Number is as follows,
542 parts of Class F fly ash；
136 parts of high-calcium fly ass；
183 ~ 203 parts of quartz sand；
0 ~ 20 part of metakaolin；
160 parts of water；
38 parts of NaOH；
173 parts of sodium metasilicate；
14 ~ 17 parts of vinal.
2. a kind of fibre-reinforced superhigh tenacity geopolymer based composites of PVA according to claim 1, its feature exists
In：Described Class F fly ash is one-level Class F fly ash, and meso-position radius (D50) are 4.732 μm.
3. a kind of fibre-reinforced superhigh tenacity geopolymer based composites of PVA according to claim 1, its feature exists
In：Described high-calcium fly ass is one-level high-calcium fly ass, and meso-position radius (D50) are 19.45 μm.
4. a kind of fibre-reinforced superhigh tenacity geopolymer based composites of PVA according to claim 1, its feature exists
In：Described quartz sand is the quartz sand of 30 ~ 100 mesh, and maximum particle diameter is no more than 0.6mm.
5. a kind of fibre-reinforced superhigh tenacity geopolymer based composites of PVA according to claim 1, its feature exists
In：Described metakaolin meso-position radius（D50）It is 5.210 μm.
6. a kind of fibre-reinforced superhigh tenacity geopolymer based composites of PVA according to claim 1, its feature exists
In：Described NaOH is graininess NaOH that purity is 98%.
7. a kind of fibre-reinforced superhigh tenacity geopolymer based composites of PVA according to claim 1, its feature exists
In：Described sodium metasilicate is the liquid sodium silicate of 3.3 moulds.
8. a kind of fibre-reinforced superhigh tenacity geopolymer based composites of PVA according to claim 1, its feature exists
In：Described vinal length is 12mm, and a diameter of 39 μm, tensile strength is 1620MPa, and elastic modelling quantity is
42.8GPa。
9. a kind of preparation method of the fibre-reinforced superhigh tenacity geopolymer based composites of PVA described in claim 1, its
It is characterised by comprising the following steps：
1）Each reactive material is weighed according to parts by weight；
2）Class F fly ash, high-calcium fly ass, metakaolin, quartz sand are added in agitated kettle, in the 62 ± 5r/min that revolves round the sun,
It is dry under conditions of 140 ± 5r/min of rotation to stir 2~4 minutes to uniform；
3）By water, sodium metasilicate, NaOH, mixing and stirring is made alkali-activator in a reaction vessel；
4）Alkali-activator is added to step 1）Agitated kettle in, revolve round the sun 125 ± 10r/min, 285 ± 10r/min's of rotation
Under the conditions of stir 3~5 minutes；
5）Vinal is added, is stirred for 5 ~ 8 minutes, until fiber is uniformly dispersed, that is, obtain described PVA fiber reinforcements
Superhigh tenacity geopolymer based composites.
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