CN106746826B - A kind of alkali-activated slag-fly ash gel material retarder and preparation method - Google Patents
A kind of alkali-activated slag-fly ash gel material retarder and preparation method Download PDFInfo
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- CN106746826B CN106746826B CN201710014775.8A CN201710014775A CN106746826B CN 106746826 B CN106746826 B CN 106746826B CN 201710014775 A CN201710014775 A CN 201710014775A CN 106746826 B CN106746826 B CN 106746826B
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- stalk
- alkali
- retarder
- fly ash
- gel material
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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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/20—Retarders
- C04B2103/22—Set retarders
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
A kind of alkali-activated slag-fly ash gel material retarder of the present invention and preparation method, stalk stem, leaf are separated and dried, takes stalk stem to cut into chunks and is broken into length 1-5mm and silicon ash roughly with ball mill after mixing, be put into grinding 10-60min in ball mill, to 400-1000 mesh powder to get.The present invention prepares alkali-activated slag-fly ash gel material retarder by main raw material(s) of stalk, maize straw resource is abundant and cheap, common retarder instead of at high price, complex production process, not environmentally, retarding effect is obvious, stalk can play the role of fiber again simultaneously, improve its brittleness.The present invention provides new approach, and simple production process for stalk comprehensive utilization, environmentally protective, and low in cost, economic benefit and social benefit are very significant.
Description
Technical field:
The present invention discloses a kind of alkali-activated slag-fly ash gel material retarder, is a kind of alkali-activated slag-flyash
Cementitious material modifying agent, while preparation method is additionally provided, belong to building material technical field.
Background technique:
Alkali-activated slag-fly ash gel material is geopolymer gelled material, and this material can benefit when manufacturing product
Use mineral waste as raw material, conserve can reach higher-strength under certain condition in the short time, while its product is with excellent
Good mechanical performance and acid and alkali-resistance, fire resisting, performance resistant to high temperature, in construction material, Materials with High Strength, solid core solid waste material, sealing
Material and heat-resisting material etc. have application.It even so, cannot since the slurry setting time of this material is too short
Reach state specified standards, be unfavorable for the forming operation of slurry in application process, it is difficult to guarantee product intensity and other
Performance requirement, while alkali-activated slag-fly ash gel material enbrittles big disadvantage, also limits its to a certain extent
Using.
There are also BF, TH, FQ compound retarders for the common retarder of alkali-activated slag-fly ash gel material, can make alkali mine
Slag-fly ash gel material retarding time is arbitrarily adjusted in 19h, but this retarder preparing process is considerably complicated, raw material valence
Lattice are also quite high, and not environmentally；All there is dosage and lack slow setting effect in other retarder such as CBM, CBA series, YP series retarder
Fruit is unobvious, and the more intensity of dosage are remarkably decreased, and dosage is difficult to control, while preparation process is complicated, expensive, in Practical Project
In be difficult to apply；The retarder such as gypsum, tartaric acid retarding effect under the conditions of standard curing is more apparent, steam-cured rapid curing condition
Under have no practical retarding effect；Using organic silicon surfactant slag particle surface establish film prevent or delay aquation into
Though journey is effective, the presetting period specified in " common portland cement " GB175-2007/XG2-2015 cannot be reached not
It obtains less than 45min and final setting time is not greater than the requirement of 390min, influence its practical application.Someone extracts sugar using stalk
With certain substance oxidation reaction occurs for solution by catalyst effect, generates sodium gluconate as retarder, but it is made
Standby complex process, production difficulty is big, at high cost, and does not refer to its retarding effect, and sodium gluconate will affect alkali and swash
The later strength of hair slag-fly ash cementitious material makes it generate strength retraction.
Stalk is abundant in china natural resources, but regeneration rate is lower, and a large amount of stalk is incinerated, and generates haze, serious dirty
Environment is contaminated, the significant wastage of stalk resource is caused.
Summary of the invention:
The present invention provides a kind of alkali-activated slag-fly ash gel material retarder, it is to solve alkali-activated slag-powder
Problem is coagulated in the sudden strain of a muscle of coal ash cementitious material, while solving the problems, such as that later strength declines and improves its brittleness.
Invention further provides a kind of alkali-activated slag-fly ash gel material retarder preparation method, productions
Simple process, it is environmentally protective, it is low in cost, it is suitable for industrialized production.
The present invention provides a kind of alkali-activated slag-fly ash gel material retarder, it is characterised in that is by following weight
Made of the raw material of portion rate:
50-95 parts of stalk, 5-50 parts of silicon ash.
A kind of alkali-activated slag-fly ash gel material retarder provided by the invention, the stalk are corn stover
Stem, length 1-5mm.
A kind of preparation method of alkali-activated slag-fly ash gel material retarder provided by the invention, it is characterised in that
Specific step is as follows:
1) stalk is separated and is crushed:
Stalk stem, leaf are separated and dried, taking stalk stem to cut into chunks, to be broken into length 1-5mm roughly with ball mill stand-by；
2) by step 1) be crushed stalk in proportion with silicon ash after mixing, be put into grinding 10-60min in ball mill,
To 400-1000 mesh powder to get the present invention.
The present invention is to produce alkali-activated slag-fly ash gel material retarder by main raw material(s) of stalk, from stalk
From the point of view of structure composition, containing substances such as a large amount of cellulose, lignin and hemicelluloses, it is added to alkali-activated slag-powder
Fibration can be played in coal ash cementitious material, so as to improve its brittleness.It can make after stalk meets aqueous slkali with ehter bond phase
Lignin structure unit even disconnects, while the ester bond for connecting lignin and hemicellulose is broken because of saponification and fiber
Hydrogen bond between element and hemicellulose is broken, and is decomposed into monosaccharide, carbohydrate contain there are many-OH functional group, in alkaline medium with it is free
Ga2+Unstable complex compound is generated, Ga in aquation initial stage liquid phase is controlled2+Concentration generate deferred action, it is same with this
When, hydroxyl makes alkali-activated slag-fly ash gel material particle surface form one layer of solvent easily with hydrone by hydrogen bond association
Change moisture film, heat evolution velocity is hindered, to have the function of slow setting.
Silicon ash main component is silica, has high activity, and average grain diameter is in 0.1~0.3 μm, specific surface area
20~28m2/g.Its fineness and specific surface area are about 80~100 times of cement, 50~70 times of flyash, belong to superfine powder, energy
The hole between alkali-activated slag-fly ash gel material material granule is enough filled, to improve its later strength.Meanwhile silicon ash
It can play the role of grinding aid, solve the problems, such as to be easy reunion when stalk grinding.Fig. 1 is alkali-activated slag-flyash gelling
Material retarder scanning electron microscope (SEM) photograph.
The positive effect of the present invention is: the present invention prepares alkali-activated slag-flyash glue by main raw material(s) of stalk
Gel material retarder, maize straw resource is abundant and cheap, and commonly using instead of at high price, complex production process, not environmentally is slow
Solidifying agent, retarding effect is obvious, while stalk can play the role of fiber again, improves its brittleness.The present invention is the comprehensive benefit of stalk
With new approach, and simple production process is provided, environmentally protective, low in cost, economic benefit and social benefit are very aobvious
It writes.
Detailed description of the invention:
Fig. 1 is alkali-activated slag of the present invention-fly ash gel material retarder scanning electron microscope (SEM) photograph:
Fig. 2 is alkali-activated slag of the present invention-fly ash gel material retarder；
Fig. 3 is bend-press ratio of the present invention and retarder volume relation curve.
Specific embodiment:
By following embodiment further illustrate description the present invention, do not limit the invention in any way, without departing substantially from
Under the premise of technical solution of the invention, easy to accomplish any of those of ordinary skill in the art made for the present invention changes
Dynamic or change is fallen within scope of the presently claimed invention.
Embodiment 1:
1, corn stover separation and broken: corn stover stem, leaf are separated and dried, and the present invention takes stalk stem to cut into chunks use
It is stand-by that ball mill is broken into roughly length 1-5mm.
2, it weighs 0.95 kilogram of corn stover and 0.05 kilogram of silicon ash grinding aid is uniformly mixed with corn stover, stir 2-
3min after the completion of mixing, is put into ball mill grinding 30min, and with 0.02 millimeter of (700 mesh) sieve, it is sharp to obtain a kind of alkali
Send out slag-fly ash cementitious material retarder.
Embodiment 2:
1, corn stover separation and broken: corn stover stem, leaf are separated and dried, and the present invention takes stalk stem to cut into chunks use
It is stand-by that ball mill is broken into roughly length 1-5mm.
2, it weighs 0.8kg corn stover and 0.2kg silicon ash grinding aid is uniformly mixed with corn stover, stir 2-3min,
After the completion of mixing, be put into ball mill grinding 30min, with 0.02 millimeter of (700 mesh) sieve, make its fineness reach 700 mesh with
Under, obtain a kind of alkali-activated slag-fly ash gel material retarder.
Embodiment 3:
1, corn stover separation and broken: corn stover stem, leaf are separated and dried, and the present invention takes stalk stem to cut into chunks use
It is stand-by that ball mill is broken into roughly length 1-5mm.
2, it weighs 0.7kg corn stover and 0.3kg silicon ash grinding aid is uniformly mixed with corn stover, stir 2-3min,
After the completion of mixing, be put into ball mill grinding 30min, with 0.02 millimeter of (700 mesh) sieve, make its fineness reach 700 mesh with
Under, obtain a kind of alkali-activated slag-fly ash gel material retarder.
Embodiment 4:
1, corn stover separation and broken: corn stover stem, leaf are separated and dried, and the present invention takes stalk stem to cut into chunks use
It is stand-by that ball mill is broken into roughly length 1-5mm.
2, it weighs 0.6kg corn stover and 0.4kg silicon ash grinding aid is uniformly mixed with corn stover, stir 2-3min,
After the completion of mixing, be put into ball mill grinding 30min, with 0.02 millimeter of (700 mesh) sieve, make its fineness reach 700 mesh with
Under, obtain a kind of alkali-activated slag-fly ash gel material retarder.
Embodiment 5:
1, corn stover separation and broken: corn stover stem, leaf are separated and dried, and the present invention takes stalk stem to cut into chunks use
It is stand-by that ball mill is broken into roughly length 1-5mm.
2, it weighs 0.5kg corn stover and 0.5kg silicon ash grinding aid is uniformly mixed with corn stover, stir 2-3min,
After the completion of mixing, be put into ball mill grinding 30min, with 0.02 millimeter of (700 mesh) sieve, make its fineness reach 700 mesh with
Under, obtain a kind of alkali-activated slag-fly ash gel material retarder.
Test example
Performance test is carried out to the retarder and activated slag-fly ash gel material of embodiment 1-5 preparation.Setting time
Detection method is according to " cement normal consistency water consumption, setting time, the stability method of inspection " GB/T1346-2011 national standard
It carries out；Strength detecting method is carried out according to " Test method for strength of hydraulic cement mortar (ISO method) " GB/T 17617-1999；Test block is supported
Shield is divided into two stages: first stage curing condition is steam curing conservation, and temperature is 60 DEG C, and for 24 hours, second stage is nature to curing time
Maintenance, 20 DEG C of curing temperature, humidity 95%, curing time 48h, experimental result such as table 1 and Fig. 3.
1. retarder of table influences activated slag-fly ash gel material performance
| Embodiment | Volume (%) | Retarder specific surface area (m2/g) | Presetting period (min) | Final setting time (min) | Flexural strength (MPa) | Compression strength (MPa) |
| Embodiment 1 | 0 | ------- | 10 | 41 | 14 | 96.3 |
| Embodiment 2 | 3 | 0.7955 | 48 | 156 | 14.6 | 96.6 |
| Embodiment 3 | 4 | 0.8326 | 52 | 207 | 14.6 | 95.9 |
| Embodiment 4 | 5 | 0.8673 | 89 | 253 | 14.8 | 96.3 |
| Embodiment 5 | 6 | 0.9261 | 102 | 389 | 14.9 | 96.2 |
To sum up, setting time can be seen that the increase with stalk volume from table 1, and the glucide in stalk is not
It dissolves out with stopping, extends first, final setting time gradually, when volume is in 3%-6%, retarding effect is best, fully meets " general silicic acid
Salt cement " presetting period cannot be less than 45min, final setting time is not greater than specified in GB175-2007/XG2-2015
The requirement of 390min；
It can be seen that in retarder retarder specific surface area after the higher grinding of silicon ash constituent content from specific surface area in table 1
Bigger, i.e., grind -aiding effect is more obvious, but when silicon ash content is excessive, due to that can be brought to retarding effect containing active silica
Negative effect, therefore, corn stover component optimum content is at 50-95 parts, and silicon ash component optimum content is at 5-50 parts.
From figure 3, it can be seen that bend-press ratio is gradually increased with the increase of retarder volume, illustrate retarder to alkali-activated carbonatite
The brittleness of slag-fly ash cementitious material has greatly improved.
Claims (1)
1. a kind of alkali-activated slag-fly ash gel material retarder, it is characterised in that be by the raw material of following weight fraction ratio
It is manufactured:
50-95 parts of stalk, 5-50 parts of silicon ash；
The alkali-activated slag-fly ash gel material retarder the preparation method is as follows:
1) stalk stem, leaf are separated and dried, taking stalk stem to cut into chunks, to be broken into length 1-5mm roughly with ball mill stand-by；
2) by step 1) be crushed stalk in proportion with silicon ash after mixing, be put into grinding 10-60min in ball mill, until
400-1000 mesh powder to get.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710014775.8A CN106746826B (en) | 2017-01-10 | 2017-01-10 | A kind of alkali-activated slag-fly ash gel material retarder and preparation method |
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| CN201710014775.8A CN106746826B (en) | 2017-01-10 | 2017-01-10 | A kind of alkali-activated slag-fly ash gel material retarder and preparation method |
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| CN106746826B true CN106746826B (en) | 2019-01-18 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20220402820A1 (en) | 2019-11-05 | 2022-12-22 | University Of Pretoria | Novel cementitious composition |
| CN112960924B (en) * | 2021-01-27 | 2022-06-14 | 广东能源集团科学技术研究院有限公司 | High-chlorine fly ash cementing material and preparation method thereof |
| CN113105170B (en) * | 2021-04-15 | 2022-04-12 | 山东农业大学 | 3D printing alkali-activated geopolymer composite material doped with kenaf bast fiber crop straw and preparation method thereof |
| CN115321858B (en) * | 2022-08-15 | 2023-07-14 | 中晶环境科技股份有限公司 | Cementing material, preparation method thereof and application of composition |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6435770B1 (en) * | 2000-10-20 | 2002-08-20 | Advanced Material Technologies Llc | Method of forming a synthetic cap on a bulk material pile |
| CN102643040A (en) * | 2012-03-23 | 2012-08-22 | 辽宁岩砂晶建材有限公司 | Preparation method of retarder for concrete and equipment adopted by preparation method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6435770B1 (en) * | 2000-10-20 | 2002-08-20 | Advanced Material Technologies Llc | Method of forming a synthetic cap on a bulk material pile |
| CN102643040A (en) * | 2012-03-23 | 2012-08-22 | 辽宁岩砂晶建材有限公司 | Preparation method of retarder for concrete and equipment adopted by preparation method |
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Effective date of registration: 20191220 Address after: No. 243, Shuangshan South Road, Chaoyang District, Changchun City, Jilin Province 130000 Patentee after: Changchun changchihongcheng Concrete Co., Ltd Address before: 130118 No. 5088 Xincheng street, Jilin, Changchun Patentee before: Jilin Jianzhu University |
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Address after: No.243, Shuangshan South Road, Chaoyang District, Changchun City, Jilin Province Patentee after: Changchun Changchi Environmental Protection Technology Co.,Ltd. Address before: No.243, Shuangshan South Road, Chaoyang District, Changchun City, Jilin Province Patentee before: Changchun changchihongcheng Concrete Co.,Ltd. |