CN108698926A - Geopolymer composite material and mineral polymer base composition - Google Patents
Geopolymer composite material and mineral polymer base composition Download PDFInfo
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- CN108698926A CN108698926A CN201680063854.1A CN201680063854A CN108698926A CN 108698926 A CN108698926 A CN 108698926A CN 201680063854 A CN201680063854 A CN 201680063854A CN 108698926 A CN108698926 A CN 108698926A
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- dry
- shgc
- room temperature
- fiber
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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
- C04B12/00—Cements not provided for in groups C04B7/00 - C04B11/00
- C04B12/005—Geopolymer cements, e.g. reaction products of aluminosilicates with alkali metal hydroxides or silicates
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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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
Abstract
The invention discloses a kind of dry-mixing compositions of the geopolymer composite material (SHGC) for the strain hardening being used to form room temperature maintenance.The dry-mixing composition is by (a) amorphous silicon aluminic acid material and (b) alkali-activator powder constituent rich in silicon and aluminium.In addition, the dry-mixing composition chosen (i) can form the geopolymer composite material of the strain hardening of room temperature maintenance without liquid exciting agent is additionally added, and (ii) shows strain hardening characteristic and multiple cracking properties.The invention also discloses the methods of mineral polymer (SHGC) composite material of the strain hardening by the way that the room temperature maintenance that water is formed is added and the SHGC for forming room temperature maintenance.
Description
Technical field
The invention discloses a kind of mineral polymer base composition and geopolymer composite materials.Invention additionally discloses
A kind of method forming geopolymer composite material using mineral polymer base composition.
Background technology
A kind of high-performance fiber of special category, which enhances cementing composite material (HPFRCC), has advanced tensile ductility,
It is about 600 times of scalability under normal concrete tensional state, is referred to as high ductility cement-base composite material (engineered
Cementitious composites, ECC).EEC is the cement-base composite material designed based on Micromechanics, using a small amount of
Chopped fibre (discontines fibers, usually by volume, 2% or less), elongation strain ability is up to 6%.
In HPFRCC researchs, sustainable development is seldom concerned.High cement content frequently appears in the mixed of several types HPFRCC
It closes in design, such as slurry slurry infiltrated fiber concrete, very-high performance fiber reinforced concrete (UHPFRC) and ECC.
One of the main reason for production of common portland cement (OPC) is global warming.It is said that cement industry
Cause global CO2 total emission volumns close to 5%, and CO2 discharges are the main reason for causing global warming.Typical ECC is mixed
It closes cement content high in object design and normally results in high Spontaneous Contraction, the heat of hydration and high cost.In addition, relevant CO2
The growth of discharge capacity and required energy consumption significantly limit the sustainable development of traditional ECC.Therefore, low cement is studied
Green ECC is necessary;To, the Potential feasibility that the CO2 caused by manufacture of cement discharges relevant global warming is reduced,
In this way, not only maintaining the stretchable ductility needed for traditional ECC, and consider sustainable development.Obtain this
One of the scheme of a target is exactly to use supplementary cementitious material (SCM), such as partly replace typical case ECC with flyash and slag and mix
Close the cement in design.In last decade, in slag and the design of large volume flyash partial alternative ECC mixtures is added
Some effort have been made to reduce the use aspect of OPC in OPC;Therefore, it reduces since cement industry CO2 discharges cause
Global warming it is potentially possible.However, the more sustainable approach in research green ECC is with alternative no cement
(cement-less binder), such as mineral polymer, to substitute the OPC adhesives in the design of ECC mixtures completely.
Mineral polymer is a kind of emerging no cement, can be used as the substitute of OPC adhesives, and with wide
Foreground and sustainability.Mineral polymer is prepared by geology source material, such as metakaolin or industry byproduct, example
It is such as rich in the flyash and slag of silica and aluminium oxide, is activated by high alkalinity exciting agent.Mineral association based on flyash
The synthesis of object can reduce at least 80% carbon emission and the energy consumption of reduction about 60% compared with the production of OPC.
Recently, in terms of research is based on the ECC of mineral polymer, some effort have been made, being known as should be hardened
The geopolymer composite material (SHGC) of change, the geopolymer binder based on flyash completely instead of OPC adhesives,
Strain hardening characteristic is shown under uniaxial pulling force.The SHGC based on flyash developed has very high elongation strain
Performance, it is average close to 4.3%.However, its uniaxial compression and to be uniaxially stretched strength range respectively be 17.4-27.6MPa and 2.9-
3.4MPa, intensity is low in belonging to, and correspondingly significantly limits the extensive uses of the SHGC researched and developed in the field of construction.In addition,
Sodium hydroxide (NaOH) solution for the highly corrosive that one kind is prepared by NaOH particles (59%w/w) and tap water (41%w/w),
Sometimes concentration is more than 14.0M, is used to prepare the EGC based on flyash, but a large amount of this to user due to needing to handle
Unfavorable alkaline solution can equally limit commercialization and the commercial Application of the SHGC researched and developed for special security consideration.
Some nearest researchs have had evaluated relatively low intensity of different exciting agent combinations to being studied recently based on powder
The influence of the matrix and composite property of the geopolymer composite material SHGC of coal ash, to improve its compression strength and tension
Stretch intensity.Experimental result shows that being in security consideration even if NaOH solution concentration is restricted to 8.0M, however, by 8.0M NaOH
Solution (28.6%w/w) and Na2SiO3The SiO of solution (71.4%w/w) composition2/Na2O ratios are 2.0 sodium bases (Na- yls) exciting agent
The SHGC based on flyash of combination manufacture shows the compression strength significantly increased, ultimate tensile strength and very high stretching
Percentage of elongation, average is 60MPa, 4.7MPa and 4.3% respectively.
Compression strength, tensile strength and the very high stretching stretching, extension of the enhancing for the SHGC based on flyash being recently developed
The green potential outstanding of rate and mineral polymer contributes to SHGC to become traditional promising sustainable replacements of ECC
Object.The remarkable mechanical performance and environment-friendly advantage generated due to the SHGC that has researched and developed, it is contemplated that extensively and on a large scale by it
Applied to construction industry.However, compared with traditional ECC, there are two it is big hinder, significantly affect develop based on flyash
The extensive use of SHGC.
First obstacle is to prepare mineral polymer matrix using deep-etching and sticky alkaline solution.Usually, mine
Object polymer substrate is manufactured by two parts mixture comprising alkaline solution and solid aluminosilicate precursors.These are to making
The unfavorable excitation agent solution of user is often used in dissolving alumino-silicate original material and controls the power of mineral polymer matrix
Learn performance, such as compression strength.Formula presence about two parts mixing that preparation " traditional " mineral polymer matrix uses
Some defects.Most important defect is to handle a large amount of highly corrosives and sticky alkaline solution to make the mineral polymer matrix be difficult
Commercialization is produced in enormous quantities;Therefore, the large-scale application of the fly ash base SHGC researched and developed is hindered.In addition, mineral association
The rheological equationm of state of object matrix can become complicated and uncontrollable because forming viscous and thick paste, especially in mineral polymer
In matrix, alkalinity derives from sodium salt.This is especially problematic, and the SHGC researched and developed does not have self closely knit characteristic.Therefore, SHGC
Comparable work is needed to go to the gap in filling maintenance processes caused by volume change between template.In addition, mineral polymer
Matrix is sensitive to the ratio of alkali and available silicate, when using waste material as silicon source in practice, it is difficult to control.Moreover,
Alkaline matter and water, which are moved to mineral polymer surface, during maintenance or use can cause the accumulation of salt in the surface soil to be inclined to and/or hypertonic
Permeability and water imbibition, unless water and alkali content can be controlled carefully in mineral polymer matrix.
It is to need heating curing about the SHGC extensive uses of research and development and the second obstacle of mass production, significantly limits
Commercial Applications of the fly ash base SHGC of research and development in construction industry.
The above-mentioned reference about background technology does not constitute a part for the common knowledge of those skilled in the art's approval.
Invention content
The single portion for passing through research and development room temperature maintenance compared to " traditional " two parts mineral polymer base composition, applicant
" dry-mixed " mineral polymer base composition is divided to take what above-mentioned two key step was recently developed in construction industry large-scale application
SHGC.Specifically, applicant have determined that a series of solid exciting agents can be used for instead of highly corrosive and be usually
The excitation agent solution unfavorable to user of viscous alkaline solution.In order to eliminate the necessity of thermal curing, applicant equally determines
A series of alumino-silicate materials can support together with solid exciting agent for manufacturing the room temperature similar with conventional cement base composition
Single part " dry-mixed " mineral polymer base composition of shield.This allows applicant to determine a series of the single of room temperature maintenances
Partly " dry-mixed " mineral polymer base composition can be combined with reinforcing fiber to obtain a kind of single part of room temperature maintenance
The geopolymer composite material (hereinafter referred to as " SHGC of room temperature maintenance ") of " dry-mixed " strain hardening, has and is suitable for construction industry
Suitable mechanical performance.
In a first aspect, the invention discloses a kind of dry-mixed mineral polymer base composition, it is used to form room temperature maintenance
Mineral association compositions, the dry-mixing composition is by following material composition:
(a) the amorphous silicon aluminate materials of silicon and aluminium are rich in;With
(b) alkali-activator powder;With
Wherein, the dry-mixing composition chosen (i) makes it possible to be formed the mineral association of the strain hardening of room temperature maintenance
Object composite material is without adding liquid exciting agent, and (ii) displaying strain hardening characteristic and multiple cracking properties.
Selected dry-mixing composition makes it possible to be formed the SHGC of room temperature maintenance by being simply added into water.Liquid exciting agent
It wouldn't be added during forming room temperature and conserving strain hardening geopolymer composite material (SHGC).However, it is possible to expect
It arrives, when preparing SHGC, other materials may be added into.For example, in some cases (if needed), it is a certain amount of efficiently to subtract
Aqua (high-range water-reducing admixture, HRWRA) and viscosity modifier (VMA) are likely to be used for obtaining
The dry-mixing composition of suitable rheology is obtained to ensure the evenly dispersed of fiber.Antifoaming agent can also be used to reduce the amount of bubble.
It is worth noting that, the SHGC for forming room temperature maintenance in a mixer mixes dry-mixing composition with water, the enhancing being then added
Then " fresh " composite material is put into mold or template before maintenance and casts by fiber.Correspondingly, phrase " only leads to
Addition water is crossed to be formed " and the whole instruction in the only water that refers to of the comparable phrase that uses be additional ingredient, for and it is dry-mixed
Composition is in conjunction with forming the mineral polymer matrix of room temperature maintenance, rather than for controlling rheological behavior and molding material.
This phrase is not intended to exclude the further step of mixing, casting and the maintenance of the SHGC of room temperature maintenance.
Alumino-silicate materials may be the appropriate combination of the material in the group comprising following substance:Slag, low calcium powder
Coal ash (F grades), calcium hydroxide (lime) and other selectable amorphous materials rich in silicon and aluminium.These materials include day
Right material, such as metakaolin and industrial waste, such as bagasse ash, rice bran ash, tailing, aluminium alloy and gray cast iron powder.
Dry-mixed mineral polymer base composition may include fine quartz sand, when into dry-mixed mineral polymer base composition plus
Enter suitable amount, quartz sand can improve the single portion of room temperature curing temperature in the case where it maintains required strain hardening characteristic
Divide the coefficient of elasticity of SHGC.It is worth noting that, when maintaining required strain hardening characteristic, the fine quartz sand of normal weight may
Replaced by different suitable tiny and light aggregates, for example, micro hollow Ceramic Balls, coal fly ash hollow micro bead, perlite and
The recyclable glass aggregate of extension, to reduce the density of the SHGC of room temperature maintenance (it is, preparing the single of light room temperature maintenance
Part SHGC).
The alkali-activator powder may be one or more kinds of materials for being selected from the group comprising following substance:Hydroxide
Sodium, sodium metasilicate and sodium carbonate.
The sodium metasilicate may be one or more kinds of materials for being selected from the group comprising following substance:Anhydrous partial silicon acid
Sodium, metasilicate pentahydrate sodium and GD grade sodium metasilicate.
The dry-mixed mineral polymer base composition may further include reinforcing fiber.
The reinforcing fiber may be made of the fiber of one or more kinds of forms, and the fiber, which is selected from, includes following object
The group of matter:Nomex (i.e. aramid fiber) fiber, high intensity and high mode polyethylene (PE) fiber, gather polyvinyl alcohol (PVA) fiber
Penylene Benzo-dioxazole (PBO) fiber and high-toughness polypropylene (HTPP) fiber.
The diameter of reinforcing fiber can be within the scope of 10-100m.However, the diameter of reinforcing fiber can also be in 30-60m ranges
It is interior.
The tensile strength of reinforcing fiber can be within the scope of at least 800MPa and length can be within the scope of 4-30mm.
The fiber isotropic modulus of reinforcing fiber can be within the scope of 10 to 300GPa.However, fiber isotropic modulus can 40 to
Within the scope of 200GPa.
Intensity is chemically combined between the interface of reinforcing fiber can be less than 3.0J/m2.However, the chemical bonding intensity between interface can
Less than 1.5J/m2。
Frictional engagement intensity between reinforcing fiber interface can be within the scope of 1.0 to 4.5MPa.However, the friction knot between interface
Closing intensity can be within the scope of 2.5 to 3.5MPa.
Sliding hardening coefficient between the interface of reinforcing fiber can be less than 2.5.However, the sliding hardening coefficient between interface also may be used
Less than 1.0.
Fiber is based on having the performance of available strain hardening and multiple cracking properties come selection.In other words, according to
Mineral polymer base composition, with the fiber of different size (length, diameter, coefficient of elasticity, tensile strength etc.) and different
Performance (chemical bonding intensity, frictional engagement intensity and sliding hardening coefficient) can be based on Micromechanics between fiber-matrix interface
Model uses.Performance is can be determined before forming combined material between all these fibers and interface.Performance between the interface
It can be characterized by single fiber pull-out test, and fibre property can be found in the specification of fiber manufacturers.
The combination of different type and/or various sizes of reinforcing fiber can be used to manufacture the room temperature of composite fibre enhancing
The SHGC of maintenance.
The strain hardening characteristic and multiple cracking properties may be with the elongation strain power within the scope of 1%-6%.
Second aspect, the invention also discloses by adding water in the dry-mixing composition according to first aspect and
Maintenance SHGC is formed by the geopolymer composite material (SHGC) of the strain hardening of room temperature maintenance at ambient temperature.
When forming the SHGC of room temperature maintenance, liquid need not be added into the dry-mixing composition according to first aspect and swash
Send out agent.
The compression strength of the SHGC of room temperature maintenance can be within the scope of 30 to 60MPa.
The third aspect, the present invention provides a kind of methods of the SHGC of formation room temperature maintenance, and this method includes by basis
Dry-mixing composition described in first aspect mixes to form the evenly dispersed SHGC of reinforcing fiber with water, then at ambient temperature
Maintenance is formed by SHGC.
The method may also include casts mixed composition in mold or template.
The method, which may also include, is added without liquid exciting agent, may include only in the step of mixing dry-mixing composition and water
Only dry-mixing composition and water are mixed.
The method may also include the mixing dry-mixing composition with water and other materials to conserve it in above-mentioned composition
Before, control its rheology and foaming.
Description of the drawings
Although any other form can all be fallen into the range of the device and method described in invention content, referring now to
Attached drawing only describes specific embodiment by way of example:
It is that room temperature according to an embodiment of the invention is formed as aluminosilicate material shown in the chart of Fig. 1
Conserve the particle diameter distribution of the flyash and slag of SHGC.
It is three of the SHGC for being formed by room temperature maintenance according to one embodiment of present invention shown in the chart of Fig. 2
Tensile stress-strain-responsive of example.
Fig. 3 is the photograph of the multiple cracking properties on the surface of the SHGC of room temperature maintenance according to an embodiment of the invention
Piece.
Specific implementation mode
The embodiment of the present invention is illustrated by example hereinafter with reference to accompanying explanation, attached drawing and table.However, it is necessary to
Understand, to describing the limitation of the embodiment of the present invention by example, attached drawing and table, is not intended to limit this hair anyway
Bright protection domain is substantially used for the purpose of contributing to the discussion of the present invention.
Applicant has carried out the work of a large amount of laboratory test to obtain a series of can conserve at room temperature and can be with
The SHGC compositions formed by the way that water is only added.It is contemplated that other compositions be introduced into composition, example
Such as, fine quartz sand, without influencing SHGC compositions in the ability for being formed with water and being conserved in room temperature.However, retouching hereafter
It states, focuses on that water is unique ingredient being additionally added in forming SHGC.The composition for being used to form SHGC matrix refers to " single
Part mineral polymer base composition ", because mixed drying material essentially forms " dry-mixed " composition.From building work
From the perspective of people, which means that when preparing SHGC, they may only relate to handle a kind of ingredient (in addition to water).This
It is unusual significant advantage in the practice of construction site, because the SHGC of existing range may require that construction worker goes to handle or connect
The liquid exciting agent of highly corrosive is touched, the liquid exciting agent need to be used together with a series of corresponding dry ingredients.
Under normal circumstances, SHGC is by alumino-silicate materials, alkali-activator powder and as the reinforcing fiber of dry ingredient
Composition.Then the alumino-silicate materials and the premixing of alkali-activator powder include single part matrix polymer base composition, real
Such as shown in table 1.
The alumino-silicate materials can be the appropriately combined of slag, Class F fly ash (F grades) and calcium hydroxide (lime).
It should be noted, however, that other amorphous materials rich in silicon and aluminium are used as alumino-silicate materials.These material packets
Include natural material, such as metakaolin;And industrial waste, such as bagasse ash, rice bran ash, tailing, aluminium alloy and gray cast iron
Powder.
Table 1:Single part mineral polymer base composition
| Mixing number | Composition | Curing condition |
| 1 | Flyash+slag+NaOH+Na2SiO3-GD | Room temperature conserves |
| 2 | Flyash+Ca (OH)2+NaOH+Na2SiO3-GD | Room temperature conserves |
| 3 | Flyash+Ca (OH)2+Na2SiO3-GD | Room temperature conserves |
| 4 | Flyash+Ca (OH)2+Na2SiO3It is anhydrous | Room temperature conserves |
| 5 | Flyash+Ca (OH)2+Na2SiO3- five water | Room temperature conserves |
| 6 | Flyash+slag+Na2SiO3-GD | Room temperature conserves |
| 7 | Flyash+slag+Na2SiO3It is anhydrous | Room temperature conserves |
| 8 | Flyash+slag+Na2SiO3- five water | Room temperature conserves |
| 9 | Flyash+slag+Na2CO3 | Room temperature conserves |
| 10 | Flyash+slag+Na2SiO3Anhydrous+Na2CO3 | Room temperature conserves |
The alkali-activator powder may be sodium hydroxide, sodium metasilicate, sodium carbonate or their combination.It is noticeable
It is that other solid exciting agents are also likely to be suitable.Sodium metasilicate can include anhydrous sodium metasilicate, metasilicate pentahydrate sodium, GD grades
Sodium metasilicate or combinations thereof.It is worth noting that, the sodium metasilicate of other ranks is also likely to be suitable.
For convenience of description rather than the purpose of limitation, the following table 2 list used in current publication to be purchased from Australia big
The illustrative specification of the silicate of the different ranks of Leah Redox and Australia PQ.
Table 2:The specification of the sodium metasilicate of different stage
* the wt.% that is averaged is provided by supplier
* the chemical bonding water in powder can discharge when being dissolved in the water.
In general, add water to single part mineral polymer base composition can make alkali-activator powder be hydrated so that
It can become to have chemism and alumino-silicate materials can be acted on to form mineral polymer matrix.Selected alkali-activator
It is not reacted with reinforcing fiber.Once to form fresh SHGC by mixing ingredient, will conserve at room temperature.Value
It is noted that fresh single part SHGC can by thermal curing (such as 24 hours at 60 DEG C) come accelerate maintenance into
Journey.
A kind of illustrative Class F fly ash (F grades) is Gladstone flyash, is purchased from Queensland ,Australia Grice
Pause power station (Gladstone power station, Queensland, Australia).A kind of illustrative slag is that one kind is worked as
Ground granulated blast furnace slag obtained by ground (ground granulated blast furnace slag, GGBFS), by the big profit of Australia
Sub- independent cement production enterprise Co., Ltd (Independent Cement Pty Ltd) supply.The chemistry of these flyash and slag
Composition and calcination loss (loss on ignition, LOI) are detected by x-ray fluorescence (XRF) and are presented in table 3.Due to hundred
Rounding up for ratio, total is divided not to reach 100%.Flyash and slag are for single part mineral association listed in table 1
In object base composition.
Table 3:It is made of the flyash of XRF detections and the exemplary chemical of slag
1Calcination loss (LOI)
The particle diameter distribution of flyash and slag is by using CILAS granularmetric analyses model 1190 to be determined, distribution is presented
In Fig. 1.Particle size distribution is summarized in table 4 passes through percentage.It is understood that the chemistry of the flyash presented
Composition and LOI are only for illustrative purposes, and are not limited to protection scope of the present invention anyway.
Table 4:The particle diameter distribution of flyash and slag
* pass through percentage.
Calcium hydroxide (the Ca (OH) of two kinds of different stages2), i.e., purity 97 (Supercalco 97) and technical grade are applicable in
The listed mixing in table 1.However, other ranks are also likely to be suitable.Purity 97 is laboratory level powder, by Australia
Redox is supplied, and technical grade is the hydrated lime in powder for being frequently used for construction industry, is supplied by Australian Cement.
Range for the amount of alkali-activator powder in SHGC compositions can be based on used alkali-activator powder
Alumino-silicate materials gross mass 1.5% to 16%.For example, if the content of slag is less than total alumino-silicate materials
50wt% will then need further amounts of anhydrous sodium metasilicate powder (such as 12wt.%).When the content of slag is equal to or higher than
50wt.%, then a small amount of anhydrous sodium metasilicate powder (such as 8wt.%) be sufficient.When these dosage are confirmed as contributing to
Acceptable firm time (setting time) and when being the required structural development in researched and developed mineral polymer, value
Obtain the required mechanical performance it is noted that the material and SHGC in single part mineral polymer base composition, higher
Dosage or lower dosage will be suitable.
It depends on the circumstances, appropriate fine quartz sand can be added in single part mineral polymer base composition tieing up
When holding required strain hardening characteristic, the coefficient of elasticity of the single part SHGC is improved.It is worth noting that, needed for maintenance
Strain hardening characteristic when, the fine quartz sand of normal weight may be replaced by the tiny and light aggregate of suitable difference, such as
Micro hollow Ceramic Balls, coal fly ash hollow micro bead, perlite and the recyclable glass aggregate of extension conserve SHGC to reduce room temperature
Density (that is, preparing the SHGC that light room temperature conserves single part).
Various commercially available polymer fibers can be used for SHGC.It is worth noting that, steel fibre can also be used.Fiber
Suitable performance may include, but be not limited to following performance, it is assumed that have the following performance:Fibre strength at least 800Mpa, fiber are straight
Diameter 10 is to 100m, fiber isotropic modulus 10 to 300GPa and fibre length 4 to 30mm.The fiber can preferably have as follows
Binding performance between interface:Chemical bonding intensity between interface less than 3.0J/m, range is 1.0 to rubbing between the interfaces 4.5MPa
It wipes and slides hardening coefficient, more preferably less than 1.0 between bond strength and interface less than 2.5.
The example of suitable reinforcing fiber includes:High-tenacity and high mode polyethylene (PE) fiber, polyvinyl alcohol (PVA) are fine
Dimension, polyphenyl support Benzo-dioxazole (PBO) fiber and high-toughness polypropylene (HTPP) fiber.It is closed it is worth noting that, other have
The fiber (for example, steel fibre) of adaptive energy may be alternatively used for replacing example mentioned herein.For convenience of description rather than limit
Purpose, the illustrative PVA fibers used in present disclosureIt (can be from Amada Co., Ltd.'s Kuraray
Kuraray Co.Ltd. are bought) performance be listed in Table 5 below.The dosage of the PVA fibers is with body integrating meter in 1 to 3% range
It is interior, preferably about 2%.
Table 5:The illustrative performance of PVA fibers
The cost of the geopolymer composite material of engineering will seriously be influenced by fiber cost.In order to meet cost effect
Benefit, the volume fraction of fiber is restricted to by volume 2% or less, but this is not the practical limitation to fiber content.
The content of fiber additionally depends on the dispersion of fiber and the limitation of machinability.In order to which there are one good tensile property, (stretching is answered
Change ability), it is ensured that uniformly disperse fiber in matrix and is necessary.It is worth noting that, from the angle of micromechanical,
There are one critical fiber volume fractionsAt this time as fruit fiber content withEqual or bigger, then composite material
Show strain hardening characteristic.As the content of fruit fiber is less than thisValue, then composite material can show traditional fibre
Enhance traditional strain softening characteristic of coagulation degree.It is describedDepending on fibre property, the matrix between fiber and matrix and boundary
Binding characteristic between face.
The following table 6 lists the exemplified composition that number 7 is mixed based on table 1.The quality showed in this specific example
Than contributing to required mechanical performance, moderate firm time and enough rheologys to keep fiber evenly dispersed.However, these
It is for illustrative purposes, is not to this limitation anyway.For example, for mixing known to one, slag and flyash
Relative quantity can be from 10 mass % flyash and 90 mass % slags to 90 mass % flyash and 10 mass % slags.Flyash contains
The example of amount includes 89 mass %, 75 mass % and 50 mass %, remaining is slag, the combination of slag and calcium hydroxide or slag
With the combination of other alumino-silicate materials.
Table 6:Composition example based on the mixing 7 in table 1
* mass ratio is the gross mass relative to flyash and slag.
1By anhydrous grade sodium metasilicate powder constituent.It is supplied by Australian Redox, specification has been given in Table 2.
2Flyash is added to, in slag and solid exciting agent.
Water consumption during preparing SHGC influences machinability, rheology and the intensity of the mineral polymer matrix
And performance between fiber-matrix interface.Usually, similar with traditional cement-based material, the content of water is higher, then can process
Property is higher, and intensity is lower.Similarly, in order to ensure uniform fiber disperses, it is also necessary to good machinability and viscosity.Slag
Content it is higher, the water content reached needed for acceptable machinability is higher.Moisture additionally depends on alumino-silicate original
The fineness (surface area) of material.In general, water content can be good to realize higher than the 30% of aluminosilicate material gross mass
Machinability and fiber dispersion.But this is only an approximate limitation.
In general, SHGC is prepared by following steps:1) in Hobart's mixer mixed powder include flyash,
Slag and solid exciting agent about 3 minutes;2) mixed dry powder is mixed with tap water, then lasting mixing about 8 minutes;3) exist
Fiber, such as PVA fibers are gradually added into fresh mineral polymer matrix, after the fresh state for reaching required, according to
Rheology then proceedes to be blended to ensure that fiber uniformly disperses extensively.
In order to obtain one evenly fiber dispersion, fiber may be dispersed into water and mineral polymer solids ratio compared with
In low mineral polymer matrix, remaining water is then added.Another method is that hydrophilic fiber can divide
It is first pre- under water before being scattered to fresh mineral polymer matrix.Before mixing, the PVA fibers can be arbitrary shape
Formula or the form of binding (there is water-soluble adhesive), wherein the form bundled is preferred.It is worth noting that, in another kind
In method, reinforcing fiber can be combined and be mixed with dry-mixing composition, and wherein water is gradually added into manufacture SHGC.
The fresh single part mineral polymer matrix and SHGC are placed into different die castings, with shake table pressure
It is real.Room temperature is conserved, sample conserves 24 hours in air under room temperature (23 DEG C ± 3 DEG C).Sample after maintenance is then from mould
It takes out in tool, is conserved 27 days at 23 DEG C ± 3 DEG C of temperature in water tank after demoulding.
The sample of room temperature maintenance is tested 28 days after casting.Compression verification is carried out to assess the mineral polymer of room temperature maintenance
The compression strength of matrix and composite material.LOADING RATES is that 20MPa ± 2 are per minute, and only peak value load is recorded.At least three
A matrix sample and three composite material samples are cast into the 50mm plastics cube molds of standard, are compacted with bumper.It is surveying
Cube sample is weighed to determine the density of matrix and composite material sample by the date of examination.
Three-point bend test carried out to the unilateral sample for having a notched beam, fixed span and depth ratio (1/d) be equal to 4 and
Initial notch depth and deck-molding ratio (a/d) are equal to 0.5, and to assess matrix fracture property, including the room temperature of manufacture conserves SHGC
Elasticity modulus (Em), fracture toughness (Km) and crack tip toughness (Jt).At least 4 have 60mm × 60mm × 280mm rulers
Very little matrix prism is cast, is compacted with shake table.The speed control of displacement is 0.18mm/min, to realize any sample most
First 30-60s reaches maximum load.The formula provided according to effective crack model (EMC) can calculate EmAnd Km。
Single fiber pull-out test is carried out to determine performance between fiber-matrix interface, including chemical bonding intensity (Gd), friction
Bond strength (0) and sliding hardening coefficient ().Sample preparation, test configurations, data processing and the parameter calculating at interface can be in texts
It is found in offering.
Uniaxial tensile force test is carried out to assess the characteristic that the room temperature of the research and development under pulling force conserves SHGC.Prepare at least three rulers
The very little rectangle certificate style sheet for 200mm × 75mm × 10mm.All certificate style sheets are in the displacement that transport ratio is 0.25 mm/min
Under control, is clamped with hydraulic pressure wedge-type using MTS test machines and carry out uniaxial tensile force test.
Test result is organized in table 7, including density, compression strength, matrix fracture property, including matrix fracture is tough
Property, elasticity modulus and crack tip toughness, uniaxial tensile force performance includes the first Crack Strength, ultimate tension intensity and elongation strain
Ability.The illustrative tensile stress of room temperature maintenance SHGC is set forth in Fig. 2 and Fig. 3 to the curve of strain and typical multiple
Rupture diagram.As shown, the SHGC of manufactured room temperature maintenance shows clear strain hardening characteristic and multiple cracking properties,
Average 4.2% high tensile adaptability to changes, this is the hundred times of ordinary cement or mineral polymer concrete.
Table 7:Room temperature conserves the test result of single part SHGC compositions in table 6
It is to be appreciated that above-mentioned refer to that the information of " tradition " or " known " be not to this information is as big in Australia
A kind of approval of Leah or other countries' general knowledge known in this field.
Claims (23)
1. a kind of dry-mixing composition is used to form the geopolymer composite material (SHGC) of the strain hardening of room temperature maintenance,
It is characterized in that, the dry-mixing composition is by following material composition:
(a) it is rich in the amorphous silicon aluminic acid material of silicon and aluminium;With
(b) alkali-activator powder;
The dry-mixing composition chosen (i) makes it possible to be formed the SHGC of room temperature maintenance without adding liquid exciting agent,
And (ii) shows strain hardening characteristic and multiple cracking properties.
2. dry-mixing composition as described in claim 1, which is characterized in that the alumino-silicate materials are selected from comprising following object
The appropriate combination of the material of the group of matter:Slag, Class F fly ash (classification F) and calcium hydroxide (lime).
3. dry-mixing composition as claimed in claim 1 or 2, which is characterized in that the dry-mixed mineral association compositions include
Fine quartz sand.
4. dry-mixing composition as claimed in claim 1 or 2, which is characterized in that the dry-mixed mineral association compositions also wrap
Tiny and light aggregate is included to reduce the density of geopolymer composite material.
5. dry-mixing composition as claimed in claim 4, which is characterized in that described tiny and light aggregate include selected from comprising
One or more kinds of aggregates of the group of following substance:Micro hollow Ceramic Balls, coal fly ash hollow micro bead, perlite and extension
Recycling glass aggregate.
6. dry-mixing composition as described in any one of the preceding claims, which is characterized in that the alkali-activator powder is choosing
Include freely one or more kinds of materials of the group of following substance:Sodium hydroxide, sodium metasilicate and sodium carbonate.
7. dry-mixing composition as claimed in claim 6, which is characterized in that the sodium metasilicate can be selected from comprising following substance
Group one or more kinds of materials:Anhydrous sodium metasilicate, metasilicate pentahydrate sodium (penta sodium metasilicate)
With GD grades of sodium metasilicate.
8. dry-mixing composition as described in any one of the preceding claims, which is characterized in that the composition further includes enhancing
Fiber, the reinforcing fiber are made of the fiber selected from the group comprising following substance of one or more kinds of forms:Poly- virtue acyl
Amine (i.e. aramid fiber) fiber, high intensity and high mode polyethylene (PE) fiber, polyvinyl alcohol (PVA) fiber, polyphenyl support Ben Bing bis- Evil
Azoles (PBO) fiber, steel fibre and high-toughness polypropylene (HTPP) fiber.
9. dry-mixing composition as described in any one of the preceding claims, which is characterized in that the tension of the reinforcing fiber is strong
Degree is at least 800Mpa, and fiber length ranges are 4 to 30mm.
10. dry-mixing composition as described in any one of the preceding claims, which is characterized in that between the interface of the reinforcing fiber
Chemical bonding intensity be less than 3.0J/m2.
11. dry-mixing composition as described in any one of the preceding claims, which is characterized in that between the interface of the reinforcing fiber
The range of frictional engagement intensity be 1.0 to 4.5MPa.
12. dry-mixing composition as described in any one of the preceding claims, which is characterized in that between the interface of the reinforcing fiber
Sliding hardening coefficient be less than 2.5, more preferably less than 1.0.
13. dry-mixing composition as described in any one of the preceding claims, which is characterized in that
The fiber isotropic modulus range of the reinforcing fiber is 10 to 300GPa.
14. dry-mixing composition as described in any one of the preceding claims, which is characterized in that the diameter model of the reinforcing fiber
Enclose is 10 to 100m.
15. dry-mixing composition as described in any one of the preceding claims, which is characterized in that the strain hardening characteristic and more
Weight cracking properties are also accompanied by the elongation strain ability in 1% to 6% range.
16. a kind of geopolymer composite material (SHGC) of the strain hardening of room temperature maintenance, which is characterized in that by such as power
Profit requires that water is added in the dry-mixing composition described in any one of 1 to 15 and maintenance SHGC is formed at room temperature.
17. the SHGC of room temperature as claimed in claim 16 maintenance, which is characterized in that the formation of the composite material need not be to
Liquid exciting agent is added in dry-mixing composition.
18. the SHGC of the room temperature maintenance as described in claim 16 or 17, which is characterized in that the pressure resistance of the SHGC of room temperature maintenance
Within the scope of the 30 to 60Mpa of degree.
19. the SHGC of the room temperature maintenance as described in any one of claim 16 to 18, which is characterized in that the composite material exhibition
Strain hardening characteristic and multiple cracking properties are shown.
20. the SHGC of the room temperature maintenance as described in any one of claim 16 to 19, which is characterized in that the strain hardening is special
Property and multiple cracking properties with the elongation strain ability in 1% to 6% range.
21. a kind of method for the SHGC forming room temperature maintenance, which is characterized in that the method includes mixing according to claim 1
Reach being uniformly distributed extensively for reinforcing fiber to any one of 15 dry-mixing compositions and water, and conserves at room temperature fresh
SHGC.
22. according to the method for claim 21, which is characterized in that the method further includes that mixed composition is cast into mould
In tool or template.
23. the method according to claim 21 or 22, which is characterized in that the method not adding liquid exciting agent.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2015904424A AU2015904424A0 (en) | 2015-10-29 | Geopolymer composite and geopolymer matrix composition | |
| AU2015904424 | 2015-10-29 | ||
| PCT/AU2016/051025 WO2017070748A1 (en) | 2015-10-29 | 2016-10-28 | Geopolymer composite and geopolymer matrix composition |
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| CN108698926A true CN108698926A (en) | 2018-10-23 |
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Country Status (3)
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|---|---|
| CN (1) | CN108698926A (en) |
| AU (2) | AU2016102403A4 (en) |
| WO (1) | WO2017070748A1 (en) |
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| WO2021189886A1 (en) * | 2020-03-24 | 2021-09-30 | 中国建筑第五工程局有限公司 | Unfired construction material using original state shielding soil and preparation method therefor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115141033A (en) * | 2021-03-31 | 2022-10-04 | 广东清大同科环保技术有限公司 | Baking-free ultra-light aggregate |
| WO2023122839A1 (en) * | 2021-12-30 | 2023-07-06 | Pontificia Universidad Catolica De Chile | Process for manufacturing pellets from tailings for use in engineering applications |
| IT202200008441A1 (en) * | 2022-04-28 | 2023-10-28 | Giovanbattista Salzano | Process for the production of alkali-activated materials (AAM), products obtainable with said process and heat-insulating materials including said AAM products |
| NO20220629A1 (en) * | 2022-06-01 | 2023-12-04 | Univ I Stavanger | One-part geopolymer composition |
| CN115806411B (en) * | 2022-09-16 | 2024-04-09 | 中国航发北京航空材料研究院 | Polymer fiber geopolymer composite material and preparation method thereof |
| CN116444228A (en) * | 2023-04-07 | 2023-07-18 | 广西大学 | Bagasse ash-metakaolin-based geopolymer repair mortar and preparation method thereof |
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| Publication number | Publication date |
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| AU2016102403A4 (en) | 2019-05-09 |
| WO2017070748A1 (en) | 2017-05-04 |
| AU2016347692A8 (en) | 2018-08-02 |
| AU2016347692A1 (en) | 2018-06-21 |
| AU2016347692A2 (en) | 2019-01-24 |
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