CN110183165A - The concrete and its preparation process of fly ash base geopolymer concrete and normal concrete knot - Google Patents
The concrete and its preparation process of fly ash base geopolymer concrete and normal concrete knot Download PDFInfo
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- CN110183165A CN110183165A CN201910480027.8A CN201910480027A CN110183165A CN 110183165 A CN110183165 A CN 110183165A CN 201910480027 A CN201910480027 A CN 201910480027A CN 110183165 A CN110183165 A CN 110183165A
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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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention relates to the concrete and its preparation process of a kind of fly ash base geopolymer concrete and normal concrete knot, it includes the component of following parts by weight, 320-600 parts of cementitious material, 3.5-5.5 parts of alkali-activator, sand 630-750 parts middle, 1000-1100 parts of rubble, 6.5-10.5 parts of additive and 142-154 parts of water.The cementitious material includes cement and flyash.The knot concrete of fly ash base geopolymer concrete and normal concrete that present specification proposes, is capable of forming different water-binder ratios gradient, makes the concrete of different labels.
Description
Technical field
The present invention relates to the technical fields of concrete preparation, more particularly, to a kind of fly ash base geopolymer concrete
With the concrete and its preparation process of normal concrete knot.
Background technique
Portland cement has become modernization construction and indispensable one of the construction material of social development progress.However,
Carbon dioxide is formed in ordinary portland cement raw material calcination process and release causes carbon emission amount increase.The common silicic acid of 1kg
0.66-0.82kg carbon emission is generated in salt cement production process.The carbon dioxide that global manufacture of cement generates accounts for artificial titanium dioxide
The 5%-7% of carbon emission.On the other hand, 1400 DEG C of hot conditions consume a large amount of energy, therefore, low energy in production process
The exploration and research and development for consuming high-environmental construction material have become the emphasis of global building constructions investigation of materials work.
And geopolymer concrete is as a kind of novel green construction material, it is discarded with the extensive industrial solid in source
Object is raw material, and energy consumption is small, carbon emission is low, it is convenient to prepare, and pressure-proof and snap-resistent intensity, acid resistance performance, anti-carbonation properties are excellent
It is different, it has broad application prospects, is one of ordinary portland cement and the optimal substitute of material.
Existing, Authorization Notice No. is that the Chinese patent of CN101570426B discloses a kind of geo-polymer recycled coagulation
Soil and preparation method thereof, component include regenerated coarse aggregate, recycled fine aggregate, flyash, slag powders, water, sodium metasilicate, hydroxide
The match ratio of sodium, naphthalenesulfonate formaldehyde condensation compound and calcium saccharate, the geopolymer concrete presses the mass ratio of each component (again
Raw coarse aggregate is based on 100 parts) as follows: recycled coarse aggregate 100, recycled fine aggregate 35-90, flyash 7-42, slag powders 7-50, water
9-10, sodium metasilicate 0.5-3, sodium hydroxide 0.5-3, naphthalenesulfonate formaldehyde condensation compound 0.05-0.20, saccharate lid 0.005-
0.05。
Its cementitious material of geo-polymer recycled concrete selection flyash and slag powders in said components, for above-mentioned
Concrete, to make concrete reach expected intensity and workability, the design of match ratio is most important, but due to geology
The special raw material of polymer and reaction mechanism, result in the uniqueness of its mixing proportion design method.Realize varying strength
Concrete is difficult the precise amounts for having specific cementitious material and chemical activator.Current use will form concrete varying strength
Still there is limitation in gradient.
Summary of the invention
The purpose of the present invention one is to provide the mixed of a kind of fly ash base geopolymer concrete and normal concrete knot
Solidifying soil, is capable of forming different intensity gradients, increases the scope of application of concrete.
Foregoing invention purpose one of the invention has the technical scheme that
A kind of concrete of flyash geopolymer concrete and normal concrete knot, including following parts by weight
Component, it is 320-600 parts of cementitious material, 3.5-5.5 parts of alkali-activator, sand 630-750 parts middle, 1000-1100 parts of rubble, additional
6.5-10.5 parts and water 142-154 parts of agent；The cementitious material includes cement and flyash.
By using above-mentioned technical proposal, cementitious material selection cement and flyash in present specification, and above-mentioned
Component proportion under, the knot concrete prepared improves traditional fly ash base geopolymer concrete existing early stage
Intensity is low, very adhesive aggregation, the slump are small, can not pump, is at high cost, the low restriction geopolymer concrete development of economic benefit
The problem of, and it is capable of forming apparent gradient ratio.On the one hand the incorporation of cement increases the total calcium content in slurry, accelerate ground
The reaction speed of matter polymer concrete, causes its early anti pressured intension higher, on the other hand also reduces the hole of hardened paste
Gap rate and contract with dry rate.It is capable of forming different water-binder ratios gradient after cement is added simultaneously, configures the concrete of different labels.It is handing over
Tie in concrete, flyash can replacing partial cement, endurance performance of concrete enough meets C10-C60 concrete requirement.Finally
The knot concrete workability prepared is good, and the slump adapts to, is suitble to pumping.
Alkali-activator plays excitation, and aquation raising active to Powder ash adsorption is embodied in terms of two: one
Active silica and aluminum oxide in aspect flyash have unsaturated bond, can ionize out calcium ion with calcium hydroxide
Reaction generates the hydrated products such as the afwillite with spacial framework and calcium aluminate hydrates；On the other hand.Calcium base absorbs
The OH- for ionizing out after agent dissolution can corrode the surface in fly vitreous, and the surface texture of flyash is made to disintegrate, and increase powder
Unsaturated bond in coal ash promotes pozzolanic reaction.
The present invention is further arranged to: alkali-activator selection selection sodium hydroxide and silicon ash, potassium silicate, in sodium metasilicate
Any mixture, potassium hydroxide and silicon ash, potassium silicate, sodium metasilicate or aluminum oxide and silicon ash, potassium silicate, sodium metasilicate
Any one of mixture.
By using above-mentioned technical proposal, sodium hydroxide, potassium hydroxide or aluminum oxide and sodium metasilicate or potassium silicate one
It rises in use, accelerating the formation of gelling phase.One side high alkalinity environment accelerates Si, Al component in raw material and dissolves out, another party
The addition of face sodium silicate solution promotes the formation of performed polymer, accelerates the transformation of slurry polymerization state, poly- so as to shorten geology
The time required to closing object solidification.
And sodium metasilicate or potassium silicate further are substituted with silicon ash, required high temperature in sodium metasilicate preparation process can be reduced
The energy consumption of high pressure；Simultaneously compared with sodium metasilicate, the content of silicon is higher in silicon ash, and its reference area is larger, and using effect is more
It is good excellent.
The present invention is further arranged to: the component including following parts by weight, 144-180 parts of cement, flyash 180-
216 parts, 3.5-4.7 parts of alkali-activator, sand 733-780 parts middle, 1064-1111 parts of rubble, 6.6-7.1 parts of additive and water
142-154 parts.
The present invention is further arranged to: the component including following parts by weight, 181-205 parts of cement, flyash 205-
246 parts, alkali-activator 4-4.7, sand 723-750 parts middle, 1020-1100 parts of rubble, 7.2-8 parts of additive and water 142-154
Part.
The present invention is further arranged to: the component including following parts by weight, 220.5-269.5 parts of cement, flyash
220.5-269.5 parts, 4.8-5.2 parts of alkali-activator, sand 660-720 parts middle, 1000-1080 parts of rubble, additive 8.5-9.5
Part and water 142-154 parts.
The present invention is further arranged to: the component including following parts by weight, including following parts by weight component, cement
270-324 parts, it is 216-270 parts of flyash, 5-5.5 parts of alkali-activator, sand 630-660 parts middle, 1000-1080 parts of rubble, additional
10-10.5 parts and water 142-154 parts of agent.
By using above-mentioned technical proposal, different water-cement ratios is formd in several groups of above-mentioned schemes, and specifies that alkali swashs
The ratio for sending out agent and cementitious material, prepares the concrete of different gradation levels, while increasing geopolymer concrete
The scope of application, reduced costs compared with geopolymer concrete, and be more suitable pumping.
The present invention is further arranged to: the flyash selects I grade of flyash.
The present invention is further arranged to: the additive is polycarboxylic type high performance water reducer.
By using above-mentioned technical proposal, polycarboxylate water-reducer has good water-reducing effect, but in practice by original
Material influence of fluctuations is larger, and the performance of above-mentioned constituent content and material is cooperated in present specification, and high-performance polycarboxylic acids plays
Bigger effect.And high performance water reducing agent of polyocarboxy acid itself and the compatibility of various cement are good, the slump of concrete is protected
It holds that performance is good, extends the construction time of concrete.And volume is low when in use, water-reducing rate is high, and contraction is small, can significantly mention
The early stage of high concrete, later strength, and selection high performance water reducing agent of polyocarboxy acid chloride ion content is low, alkali content is low, is conducive to
The durability of concrete.
Another goal of the invention of the invention is to provide a kind of fly ash base geopolymer concrete and normal concrete
It is high to have intensity using the concrete that above-mentioned preparation process prepares, and is capable of forming by the preparation process of the concrete of knot
The advantages of obvious gradient ratio.
Foregoing invention purpose two of the invention has the technical scheme that
The preparation process of fly ash base geopolymer concrete and the concrete of normal concrete knot, including following
Preparation step,
Step 1: stirring 20-40S after middle sand and rubble are mixed, obtain the first mixture；
Step 2: stirring 30-35S in the first mixture is added in flyash, cement and alkali-activator and obtains the second mixture；
Step 3: additive being added into the second mixture and water continues to stir 30-40S up to the concrete of knot.
By using above-mentioned technical proposal, prepared using the concrete that above-mentioned preparation step just completes knot, preparation
Simple process, strong operability.
In conclusion advantageous effects of the invention are as follows:
1. the knot concrete of fly ash base geopolymer concrete and normal concrete that present specification proposes,
It is capable of forming different water-binder ratios gradient, makes the concrete of different labels；
2. flyash can replace part of cement, and concrete strength and durability meet C10- in the concrete of knot
The requirement of C60 concrete；
It is suitable for pumping 3. the concrete workability for the knot being prepared using the application match ratio and technique is good；And
More energy-saving and emission-reduction, economical rationality；Applicability is extensive.
Specific embodiment
The concrete of flyash geopolymer concrete and normal concrete knot, the group including following parts by weight
Point, 320-600 parts of cementitious material, 3.5-5.5 parts of alkali-activator, sand 630-750 parts middle, 1000-1100 parts of rubble, additive
6.5-10.5 parts and water 142-154 parts.Cementitious material includes cement and flyash.
Wherein mixture, the hydroxide of alkali-activator selection sodium hydroxide and any one of silicon ash, potassium silicate, sodium metasilicate
The mixture of potassium and silicon ash, potassium silicate, sodium metasilicate or aluminum oxide and any one of silicon ash, potassium silicate, sodium metasilicate.
The purity of sodium hydroxide is >=99% in specific alkali-activator, and the purity of potassium hydroxide is 99.5%.Sodium metasilicate
For 3.3 moulds.Potassium silicate is 3.3 moulds.Silicon ash is commercially available common silicon ash.
And alkali-activator when in use directly mixes the two.
Cement belongs to normal silicate PO42.5 cement；Flyash selects I grade of flyash.Middle sand belongs to sand in II class；
Rubble is 5-25mm continuous grading rubble；Additive selects polycarboxylic type high performance water reducer.Polycarboxylic type high performance water reducer buying
From Shaanxi BoHai Chemical Engineering Co., Ltd.
Specifically include following embodiment
Embodiment 1
Fly ash base geopolymer concrete and the concrete of normal concrete knot include cement 144kg, flyash
216kg, sodium hydroxide 1.7kg, silicon ash 3kg, middle sand 780kg, rubble 1090.14kg, polycarboxylic type high performance water reducer 6.6kg
With water 142kg.
The preparation process of fly ash base geopolymer concrete and the concrete of normal concrete knot, including following
Preparation step,
Step 1: 20-40S is stirred after middle sand and rubble are mixed, preferably 30S in the present embodiment obtains the first mixture；
Step 2: flyash, cement and alkali-activator are added in the first mixture and stir 30-35S, it is excellent in the present embodiment
It is selected as 30S, obtains the second mixture；
Step 3: additive being added into the second mixture and water continues to stir 30-40S up to the concrete of knot.This reality
Applying preferred mixing time in example is 30S.
Embodiment 2-12
Embodiment 2-12 the difference from embodiment 1 is that constituent content difference.
Specific constituent content is referring to table 1
The constituent content table of table 1 embodiment 1-12 and comparative example 1-12.
1, slump cone: (1) being fixed on bottom plate by slump consistancy test, by three layers of the C30-C60 concrete being prepared into point
It is fitted into slump cone；(2) every to fill a layer concrete, it is plugged and pounded 25 times, when plugging and pounding bottom using tamper ecto-entad by screw type
Tamper should extend through bottommost, and tamper should be inserted through lower layer of surface when plugging and pounding the second layer and top layer；(3) it when being encased in top layer, mixes
Solidifying soil should be higher by slump nozzle, and smooth out along nozzle；(4) concrete on the bottom plate of slump cone side is removed, it is vertical stable
Lift slump cone, puts down gently beside sample；(5) when concrete examination body is not when collapsing, with steel ruler measuring cylinder height and after collapsing
Concrete tries the difference in height between body highest point, as slump value, unit mm, the revision of the convention to 5mm.
2, divergence test: after connecing above-mentioned slump consistancy test (1)-(4) step, when concrete examination body not extension when, use
Steel ruler measures the maximum gauge and the diameter of maximum gauge in vertical direction of concrete examination body expanding surface, when the difference of two diameters is less than
When 50mm, two diameter arithmetic mean of instantaneous values should be taken as extension angle value, unit mm, the revision of the convention to 5mm.When the difference of two diameters is greater than 50mm
When, it tests again.
3, concrete sample production and test: the concrete prepared is once fitted into concrete test die, and is higher by examination
Die orifice；Die trial is placed on concrete vibrating stand and is vibrated, until continueing to that slurry is returned on surface；Stop vibration, removes die trial, strike off examination
Mould extra concrete suitable for reading is smoothed out when concrete closes on initial set with spatula, is placed in 20 ± 5 DEG C of environment；After 24 hours
Number, demoulding are put into standard curing room and are conserved；When reaching 28 days standard curing ages, takes out, do compression strength examination
It tests.
The testing result of table 2 embodiment 1-12 and comparative example 1-12
It can be derived that by the experimental data of upper table, the same concrete, concrete 28 days for adding alkali-activator are strong
Degree and workability are significantly better than the normal concrete for being not added with alkali-activator, and meet national standard.And as grade is strong
The increase of degree, the mass fraction that flyash accounts for cementitious material tend to lower limit.
And the concrete energy formed after the concrete selection normal concrete and geopolymer concrete knot of the application
Apparent gradient is enough formed, and universality is wide, can satisfy C10-C60 concrete requirement.
By taking C30 concrete as an example, the alkali-activator in component is also an option that different materials.
Embodiment 13
Embodiment 13 is the difference from embodiment 1 is that alkali-activator in component is sodium hydroxide and potassium silicate, and hydrogen-oxygen
The ratio for changing sodium and potassium silicate is 7:3.
Embodiment 14
Embodiment 14 is the difference from embodiment 1 is that alkali-activator in component is sodium hydroxide and sodium metasilicate, and hydrogen-oxygen
The ratio for changing sodium and potassium silicate is 7:3.
Alkali-activator is also an option that potassium hydroxide and silicon ash, potassium hydroxide and potassium silicate, hydrogen-oxygen in other embodiments
Any group for changing potassium and sodium metasilicate or aluminum oxide and silicon ash, aluminum oxide and potassium silicate, aluminum oxide and sodium metasilicate
Mixing, wherein potassium hydroxide and silicon ash, potassium hydroxide and potassium silicate, potassium hydroxide and sodium metasilicate or aluminum oxide and silicon
The weight ratio of ash, aluminum oxide and potassium silicate, aluminum oxide and sodium metasilicate is 7:3.
In embodiment 13 and 14, the early strength of the concrete of obtained knot is higher.
The concrete of the knot of the application is equally applicable to the concrete of C10 and C20, and specific proportion is referring to following tables
Lattice.
The content of the concrete of table 3 C10 and C20
The laboratory test results of 4 15-20 grades of comparative example 15-20 of embodiment of table
The component selection of embodiment 15-20 still is able to be applicable in above-mentioned content range.
The embodiment of present embodiment is presently preferred embodiments of the present invention, not limits protection of the invention according to this
Range, therefore: the equivalence changes that all structures under this invention, shape, principle are done, should all be covered by protection scope of the present invention it
It is interior.
Claims (9)
1. a kind of concrete of flyash geopolymer concrete and normal concrete knot, it is characterised in that: including as follows
The component of parts by weight, 320-600 parts of cementitious material, 3.5-5.5 parts of alkali-activator, sand 630-750 parts middle, rubble 1000-
1100 parts, 6.5-10.5 parts of additive and 142-154 parts of water；The cementitious material includes cement and flyash.
2. the concrete of fly ash base geopolymer concrete and normal concrete knot according to claim 1,
It is characterized in that: mixture, the hydrogen-oxygen of alkali-activator the selection sodium hydroxide and any one of silicon ash, potassium silicate, sodium metasilicate
Change the mixture of potassium and silicon ash, potassium silicate, sodium metasilicate or aluminum oxide and any one of silicon ash, potassium silicate, sodium metasilicate.
3. the concrete of fly ash base geopolymer concrete and normal concrete knot according to claim 1,
It is characterized in that: the component including following parts by weight, 144-180 parts of cement, 180-216 parts of flyash, alkali-activator 3.5-4.7
Part, sand 733-780 parts middle, 1064-1111 parts of rubble, 6.6-7.1 parts of additive and 142-154 parts of water.
4. the concrete of fly ash base geopolymer concrete and normal concrete knot according to claim 1,
Be characterized in that: the component including following parts by weight, 181-205 parts of cement, 205-246 parts of flyash, alkali-activator 4-4.7,
Middle sand 723-750 parts, 1020-1100 parts of rubble, 7.2-8 parts of additive and 142-154 parts of water.
5. the concrete of fly ash base geopolymer concrete and normal concrete knot according to claim 1,
It is characterized in that: the component including following parts by weight, 220.5-269.5 parts of cement, 220.5-269.5 parts of flyash, alkali-activated carbonatite
4.8-5.2 parts of agent, sand 660-720 parts middle, 1000-1080 parts of rubble, 8.5-9.5 parts of additive and 142-154 parts of water.
6. the concrete of fly ash base geopolymer concrete and normal concrete knot according to claim 1,
Be characterized in that: including following parts by weight component, 270-324 parts of cement, 216-270 parts of flyash, 5-5.5 parts of alkali-activator,
Middle sand 630-660 parts, 1000-1080 parts of rubble, 10-10.5 parts of additive and 142-154 parts of water.
7. fly ash base geopolymer concrete according to claim 1-6 is mixed with normal concrete knot
Solidifying soil, it is characterised in that: the flyash selects I grade of flyash.
8. fly ash base geopolymer concrete according to claim 1-6 is mixed with normal concrete knot
Solidifying soil, it is characterised in that: the additive is polycarboxylic type high performance water reducer.
9. a kind of fly ash base geopolymer concrete as claimed in any one of claims 1 to 6 and normal concrete knot
The preparation process of concrete, which is characterized in that including following preparation step,
Step 1: stirring 20-40S after middle sand and rubble are mixed, obtain the first mixture;
Step 2: stirring 30-35S in the first mixture is added in flyash, cement and alkali-activator and obtains the second mixture；
Step 3: additive being added into the second mixture and water continues to stir 30-40S up to the concrete of knot.
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| CN110950584A (en) * | 2019-12-23 | 2020-04-03 | 中建西部建设新疆有限公司 | Silica fume/volcanic ash based geopolymer concrete and preparation method thereof |
| CN113264719A (en) * | 2021-06-11 | 2021-08-17 | 扬州工业职业技术学院 | Ground polymer-based foam concrete for roads and preparation method thereof |
| CN114262191A (en) * | 2021-12-29 | 2022-04-01 | 华润水泥技术研发有限公司 | Roadbed water stabilization layer using tungsten tailings as main raw material |
| CN114671641A (en) * | 2022-03-07 | 2022-06-28 | 辽宁工程技术大学 | Novel coal gangue aggregate fly ash geopolymer concrete material and preparation method thereof |
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| CN113264719A (en) * | 2021-06-11 | 2021-08-17 | 扬州工业职业技术学院 | Ground polymer-based foam concrete for roads and preparation method thereof |
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| CN114262191B (en) * | 2021-12-29 | 2023-04-25 | 华润水泥技术研发有限公司 | Roadbed water stabilization layer using tungsten tailings as main raw material |
| CN114671641A (en) * | 2022-03-07 | 2022-06-28 | 辽宁工程技术大学 | Novel coal gangue aggregate fly ash geopolymer concrete material and preparation method thereof |
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Inventor after: Zhang Bao Inventor after: Liu Zhiqiang Inventor after: Liu Peiyin Inventor after: Du Jing Inventor after: Zhou Jie Inventor after: Tang Rong Inventor before: Liu Zhiqiang Inventor before: Liu Peiyin Inventor before: Du Jing Inventor before: Zhang Bao Inventor before: Zhou Jie Inventor before: Tang Rong |
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Application publication date: 20190830 |