CN106477930A - A kind of chemical admixture for exciting old long-pending flyash activity and its application - Google Patents
A kind of chemical admixture for exciting old long-pending flyash activity and its application Download PDFInfo
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- CN106477930A CN106477930A CN201610889010.4A CN201610889010A CN106477930A CN 106477930 A CN106477930 A CN 106477930A CN 201610889010 A CN201610889010 A CN 201610889010A CN 106477930 A CN106477930 A CN 106477930A
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- chemical admixture
- old long
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- flyash
- building block
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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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/12—Acids or salts thereof containing halogen in the anion
- C04B22/124—Chlorides of ammonium or of the alkali or alkaline earth metals, e.g. calcium chloride
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/10—Lime cements or magnesium oxide cements
-
- 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
-
- 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
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Processing Of Solid Wastes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of chemical admixture for exciting old long-pending flyash activity and its application, it is 0～9 by weight that the chemical admixture is NaCl or NaCl and CaO:4.5～9 mixtures that makes.During application of the chemical admixture on air-entrained concrete building block is prepared, in the raw material of air-entrained concrete building block, chemical admixture with the weight ratio of old long-pending flyash is：1～4:30.The chemical admixture can improve the resistance to compression of old long-pending powdered coal ash product, rupture strength, improve the activity of old long-pending flyash.The present invention mixes old long-pending flyash using chemical admixture, to excite the activity of old long-pending flyash.Be allowed to the production of air-entrained concrete building block is can apply to, be that the recycling of old long-pending flyash opens up a new approach, original flyash stack yard (grey dam) will be progressively digested after popularization, with larger economy and social benefit.
Description
Technical field
The present invention relates to a kind of chemical admixture for exciting old long-pending flyash activity and its application, belong to inorganic non-metallic material
Material technical field.
Background technology
Used as traditional industrial residue, under the guiding of national policy, recycling achieves bright flyash within nearly 2 years
Aobvious effect, the flyash that each high-power station newly produces are currently in the situation that supply falls short of demand, cause flyash price continuous rise,
The air entrained concrete enterprise for giving flyash for one of primary raw material brings the difficulty of raw material supply and larger cost pressure.
And on the other hand, before Ash Utilization is using effect is obtained, the conventional treatment mode of flyash is to concentrate to store up, decades
Time causes each power plant and has been equipped with several stockyards (grey dam), as old long-pending flyash activity is relatively low, most of plate
Form block, in today that flyash is fully used, still can not effectively be obtained by, not only occupy substantial amounts of soil, portion
Also there is certain potential safety hazard in point stockyard.
Content of the invention
The purpose of the present invention：A kind of method for old long-pending flyash activity being excited using chemical admixture is provided, and is old accumulated powder
The recycling of coal ash opens up a new approach, will progressively digest original flyash stack yard (grey dam) after popularization, tool
There are larger economy and social benefit.
Technical scheme is as follows：
First, the present invention proposes a kind of chemical admixture for exciting old long-pending flyash activity, and its composition of raw materials is this
Sample：It is 0～4.5 by weight that the chemical admixture is NaCl or NaCl and CaO:9 mixtures that makes.
Secondly, the present invention proposes a kind of application of this chemical admixture, that is, excite the chemistry of old long-pending flyash activity
Application of the additive on air-entrained concrete building block is prepared.When air-entrained concrete building block is prepared using the chemical admixture,
In the raw material of air-entrained concrete building block, chemical admixture with the weight ratio of old long-pending flyash is：1～4:30.
Application of the aforesaid chemical admixture for exciting old long-pending flyash activity on air-entrained concrete building block is prepared is this
Sample, the preparation method that the chemical admixture is prepared air-entrained concrete building block comprises the steps：
1) the old long-pending flyash of wet ball grinding so as to be smaller in size than 180 mesh sieves (80 μm)；
2) after the old long-pending flyash after wet ball grinding being mixed with lime, desulfurated plaster, water put into mixer premix 10～
15min obtains pre- mixed slurry；
3) chemical admixture, cement is added in the pre- mixed slurry of mixer is entered and stirs 2～4min, subsequently by slip
Pour die casting shaping into, in 60 DEG C ± 2 DEG C of fog room, carry out wet curing；
4) building block after wet curing is put in still kettle carries out the demoulding after steam press maintenance；
5) building block after the demoulding continues to conserve in fog room to regulation age.
Wherein, step 3) in the condition of steam press maintenance be：190 DEG C ± 5 DEG C of pressure 1.2MPa, temperature, the steam pressure time 8 is little
When.Step 4) the block curing condition after the demoulding is：20 DEG C ± 1 DEG C of temperature, humidity RH>95%, time 3d.
Beneficial effects of the present invention：The chemical admixture of the present invention can improve the resistance to compression of old long-pending powdered coal ash product, anti-folding
Intensity, improves the activity of old long-pending flyash.The present invention adopts chemical admixture to mix old long-pending flyash to excite old long-pending flyash
Activity, be allowed to can apply to the production of air-entrained concrete building block, be old long-pending flyash recycling open up one new
Approach, will progressively digest original flyash stack yard (grey dam), with larger economy and social benefit after popularization.
Specific embodiment
With reference to embodiment, the present invention is further illustrated.
Embodiment 1：
Make the aerated concrete products of old long-pending flyash activity excitation, each raw material weight proportioning of soup processed：12 parts of cement, flyash
60 parts, 160 parts of water, 21 parts of lime, 3 parts of desulfurated plaster, 2 parts of chemical admixture.Chemical admixture is NaCl.
Comprise the following steps that：
1) grinding will be carried out by wet ball grinding after old long-pending flyash, desulfurated plaster, water mixing, lime adopts dry ball milling
Grinding is to fine powder material, and the old long-pending flyash slip after grinding is put into mixer premix 10min with the lime after grinding；
2) chemical admixture, cement will be added in the slip after premix, and continue to stir 2～4min, subsequently slip is fallen
Enter in mould and shaping is poured, in 60 DEG C ± 2 DEG C of fog room, carry out wet curing；
3) building block after wet curing is put in still kettle carries out steam press maintenance (1.2MPa, steam pressure 8 is little at 190 DEG C ± 5 DEG C
When), the building block after the demoulding continues maintenance in fog room, and (temperature is 20 DEG C ± 1 DEG C, humidity RH>95%) to regulation age
(3d).
Embodiment 2：
Make the glue article for exciting old long-pending flyash activity, each raw material weight proportioning of soup processed：70 parts of cement, flyash 30
Part, 50 parts of water, 300 parts of normal sand, 1 part of chemical admixture.The chemical admixture is NaCl.
Comprise the following steps that：
1) prepare raw material, for commercially available, water is ordinary tap water for cement, normal sand, CaO, NaCl, flyash be at 105 DEG C
Dry to constant weight and the ball milling old long-pending flyash of 20～30 minutes.
2) take by the old long-pending flyash 135g after ball milling, cement 315g, normal sand 1350g put into mixer premix 10～
15min；Pre- mixed powder is poured in mixer, and 60 DEG C of ± 2 DEG C of water for having dissolved NaCl 4.5g are added, stir 2 slowly～
4min, subsequently pours slip into mould, and the volume of cast is about the 2/3～3/4 of mould, and the acceleration for placing into 40 DEG C ± 2 DEG C is supported
Carry out wet curing in protecting box, test mould surface cut flat with perching knife, be put in still kettle carry out steam press maintenance (1.2MPa, 190
Steam pressure 8 hours at DEG C ± 5 DEG C).After the demoulding, (temperature is 20 DEG C ± 1 DEG C, humidity RH to continue maintenance in fog room>95%) extremely
Regulation age (3d), tests the intensity of glue article.
Test result is compression strength 33.32MPa, rupture strength 4.20MPa.And it is not added with this kind of chemical admixture glue sand
Product is compression strength 24.23MPa, rupture strength 3.38MPa.
Embodiment 3：
Make the glue article for exciting old long-pending flyash activity, each raw material weight proportioning of soup processed：70 parts of cement, flyash 30
Part, 50 parts of water, 300 parts of normal sand, 2 parts of chemical admixture, in chemical admixture, 1 part of CaO, 1 part of NaCl.
Comprise the following steps that：
1) prepare raw material, for commercially available, water is ordinary tap water for cement, normal sand, CaO, NaCl, flyash be at 105 DEG C
Dry to constant weight and the ball milling old long-pending flyash of 20～30 minutes.
2) take by the old long-pending flyash 135g after ball milling, cement 315g, normal sand 1350g put into mixer premix 10～
15min；Pre- mixed powder is poured in mixer, and 60 DEG C of ± 2 DEG C of water for having dissolved CaO 4.5g, NaCl 4.5g is added,
Slowly 2～4min is stirred, subsequently pours slip into mould, the volume of cast is about the 2/3～3/4 of mould, places into 40 DEG C ± 2 DEG C
Accelerating wet curing to be carried out in curing box, test mould surface being cut flat with perching knife, being put in still kettle carries out steam press maintenance
(1.2MPa, steam pressure 8 hours at 190 DEG C ± 5 DEG C).After the demoulding, (temperature is 20 DEG C ± 1 DEG C, humidity to continue maintenance in fog room
RH>95%) to regulation age (3d), the intensity of glue article is tested.
Test result is compression strength 32.06MPa, rupture strength 4.10MPa.And it is not added with this kind of chemical admixture glue sand
Product is compression strength 24.23MPa, rupture strength 3.38MPa.
Embodiment 4：
Make the glue article for exciting old long-pending flyash activity, each raw material weight proportioning of soup processed：70 parts of cement, flyash 30
Part, 50 parts of water, 300 parts of normal sand, 3 parts of chemical admixture, in chemical admixture, 2 parts of CaO, 1 part of NaCl.
Comprise the following steps that：
1) prepare raw material, for commercially available, water is ordinary tap water for cement, normal sand, CaO, NaCl, flyash be at 105 DEG C
Dry to constant weight and the ball milling old long-pending flyash of 20～30 minutes.
2) take by the old long-pending flyash 135g after ball milling, cement 315g, normal sand 1350g put into mixer premix 10～
15min；Pre- mixed powder is poured in mixer, and 60 DEG C of ± 2 DEG C of water for having dissolved CaO 9g, NaCl 4.5g are added, slowly
Stir 2～4min, subsequently pour slip into mould, the volume of cast is about the 2/3～3/4 of mould, place into 40 DEG C ± 2 DEG C plus
Wet curing being carried out in fast curing box, test mould surface being cut flat with perching knife, being put in still kettle carries out steam press maintenance
(1.2MPa, steam pressure 8 hours at 190 DEG C ± 5 DEG C).After the demoulding, (temperature is 20 DEG C ± 1 DEG C, humidity to continue maintenance in fog room
RH>95%) to regulation age (3d), the intensity of glue article is tested.
Test result is compression strength 32.95MPa, rupture strength 4.15MPa.And it is not added with this kind of chemical admixture glue sand
Product is compression strength 24.23MPa, rupture strength 3.38MPa.
Embodiment 5：
Make the glue article for exciting old long-pending flyash activity, each raw material weight proportioning of soup processed：70 parts of cement, flyash 30
Part, 50 parts of water, 300 parts of normal sand, 4 parts of chemical admixture, in chemical admixture, 3 parts of CaO, 1 part of NaCl.
Comprise the following steps that：
1) prepare raw material, for commercially available, water is ordinary tap water for cement, normal sand, CaO, NaCl, flyash be at 105 DEG C
Dry to constant weight and the ball milling old long-pending flyash of 20～30 minutes.
2) take by the old long-pending flyash 135g after ball milling, cement 315g, normal sand 1350g put into mixer premix 10～
15min；Pre- mixed powder is poured in mixer, and add dissolved CaO 13.5g, 60 DEG C ± 2 DEG C of NaCl 4.5g
Water, stirs 2～4min slowly, subsequently pours slip into mould, and the volume of cast is about the 2/3～3/4 of mould, places into 40 DEG C ± 2
DEG C acceleration curing box in carry out wet curing, test mould surface is cut flat with perching knife, being put in still kettle carries out steam press maintenance
(1.2MPa, steam pressure 8 hours at 190 DEG C ± 5 DEG C).After the demoulding, (temperature is 20 DEG C ± 1 DEG C, humidity to continue maintenance in fog room
RH>95%) to regulation age (3d), the intensity of glue article is tested.
Test result is compression strength 30.78MPa, rupture strength 3.77MPa.And it is not added with this kind of chemical admixture glue sand
Product is compression strength 24.23MPa, rupture strength 3.38MPa.
Embodiment 6：
Make the glue article for exciting old long-pending flyash activity, each raw material weight proportioning of soup processed：70 parts of cement, flyash 30
Part, 50 parts of water, 300 parts of normal sand, 4 parts of chemical admixture, in chemical admixture, 1.8 parts of CaO, 1.8 parts of NaCl, ultra-fine boiling
0.2 part of stone flour, 0.2 part of glauber salt.
Comprise the following steps that：
1) prepare raw material, cement, normal sand, CaO, NaCl, ultrafine zeolite powder, glauber salt are commercially available, and water is for commonly originally
Water, flyash are to dry to constant weight and the ball milling old long-pending flyash of 20～30 minutes at 105 DEG C.
2) take by the old long-pending flyash 135g after ball milling, cement 315g, normal sand 1350g put into mixer premix 10～
15min；Pre- mixed powder is poured in mixer, and is added and has dissolved CaO 8.1g, NaCl 8.1g, ultrafine zeolite powder
0.9g, 60 DEG C of ± 2 DEG C of water of glauber salt 0.9g, stir 2～4min slowly, subsequently pour slip into mould, and the volume of cast is about mould
The 2/3～3/4 of tool, carries out wet curing in the acceleration curing box for placing into 40 DEG C ± 2 DEG C, cuts test mould surface with perching knife
Flat, being put in still kettle carries out steam press maintenance (1.2MPa, steam pressure 8 hours at 190 DEG C ± 5 DEG C).After the demoulding, continue in fog room
(temperature is 20 DEG C ± 1 DEG C, humidity RH for middle maintenance>95%) to regulation age (3d), the intensity of glue article is tested.
Test result is compression strength 34.23MPa, rupture strength 3.97MPa.And it is not added with this kind of chemical admixture glue sand
Product is compression strength 24.23MPa, rupture strength 3.38MPa.
Embodiment 7：
Make the glue article for exciting old long-pending flyash activity, each raw material weight proportioning of soup processed：70 parts of cement, flyash 30
Part, 50 parts of water, 300 parts of normal sand, 4 parts of chemical admixture, in chemical admixture, 1.5 parts of CaO, 1.3 parts of NaCl, potassium silicate
0.8 part, 0.2 part of triethanolamine, 0.1 part of modifying agent polyacrylamide, 0.1 part of boron carbide powder.
Comprise the following steps that：
1) raw material, cement, normal sand, CaO, NaCl, potassium silicate, triethanolamine, modifying agent polyacrylamide, carbonization are prepared
Boron powder is commercially available, and water is ordinary tap water, and flyash is to dry to constant weight and the ball milling old long-pending fine coal of 20～30 minutes at 105 DEG C
Ash.
2) take by the old long-pending flyash 135g after ball milling, cement 315g, normal sand 1350g put into mixer premix 10～
15min；Pre- mixed powder is poured in mixer, and add dissolved CaO 6.75g, NaCl 5.85g, potassium silicate 3.6g,
Triethanolamine 0.9g, modifying agent polyacrylamide 0.45g, 60 DEG C of ± 2 DEG C of water of boron carbide powder 0.45g, stir 2～4min slowly, with
Afterwards slip is poured into mould, the volume of cast is about the 2/3～3/4 of mould, enters in the acceleration curing box for placing into 40 DEG C ± 2 DEG C
Test mould surface is cut flat with by row wet curing with perching knife, be put in still kettle carry out steam press maintenance (1.2MPa, 190 DEG C ± 5 DEG C
Lower steam pressure 8 hours).After the demoulding, (temperature is 20 DEG C ± 1 DEG C, humidity RH to continue maintenance in fog room>95%) to regulation age
(3d), the intensity of glue article is tested.
Test result is compression strength 36.25MPa, rupture strength 4.03MPa.And it is not added with this kind of chemical admixture glue sand
Product is compression strength 24.23MPa, rupture strength 3.38MPa.The result that the program is obtained has very unexpected greatly property, adopts
With the chemical admixture of the program, under equal conditions, the properties of product are greatly improved, and are that chemical admixture is next
One new direction of step research.
Certainly, the concrete application example of the above simply present invention, the present invention also has other embodiments, all using equivalent
The technical scheme that replacement or equivalent transformation are formed, all falls within protection domain of the presently claimed invention.
Claims (4)
1. a kind of chemical admixture for exciting old long-pending flyash activity, it is characterised in that：The chemical admixture is NaCl or NaCl
It is 0～4.5 by weight with CaO:9 mixtures that makes.
2. the chemical admixture for exciting old long-pending flyash activity described in a kind of claim 1 is on air-entrained concrete building block is prepared
Application, it is characterised in that：In the raw material of air-entrained concrete building block, chemical admixture with the weight ratio of old long-pending flyash is：1
～4:30.
3. the chemical admixture for exciting old long-pending flyash activity according to claim 2 is on air-entrained concrete building block is prepared
Application, it is characterised in that the preparation method of the air-entrained concrete building block comprises the steps：
1) the old long-pending flyash of wet ball grinding so as to be smaller in size than 180 mesh sieves；
2) mixer is put into after mixing the old long-pending flyash after wet ball grinding with lime, desulfurated plaster, water premixes 10～15min
Obtain pre- mixed slurry；
3) chemical admixture, cement is added in the pre- mixed slurry of mixer is entered and stirs 2～4min, subsequently slip is poured into
Die casting is molded, and carries out wet curing in 60 DEG C ± 2 DEG C of fog room；
4) building block after wet curing is put in still kettle carries out the demoulding after steam press maintenance；
5) building block after the demoulding continues to conserve in fog room to regulation age.
4. the chemical admixture for exciting old long-pending flyash activity according to claim 4 is on air-entrained concrete building block is prepared
Application, it is characterised in that：Step 4) the block curing condition after the demoulding is：20 DEG C ± 1 DEG C of temperature, humidity RH>95%, the time
3d.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610889010.4A CN106477930A (en) | 2016-10-12 | 2016-10-12 | A kind of chemical admixture for exciting old long-pending flyash activity and its application |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610889010.4A CN106477930A (en) | 2016-10-12 | 2016-10-12 | A kind of chemical admixture for exciting old long-pending flyash activity and its application |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109748564A (en) * | 2019-03-19 | 2019-05-14 | 贵州师范大学 | The method that addition fiber improves old long-pending powder ash air-entrained concrete flexural strength |
| CN109747025A (en) * | 2019-03-19 | 2019-05-14 | 贵州师范大学 | Improve the mixing proportion design method of old long-pending powder ash air-entrained concrete flexural strength |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109748564A (en) * | 2019-03-19 | 2019-05-14 | 贵州师范大学 | The method that addition fiber improves old long-pending powder ash air-entrained concrete flexural strength |
| CN109747025A (en) * | 2019-03-19 | 2019-05-14 | 贵州师范大学 | Improve the mixing proportion design method of old long-pending powder ash air-entrained concrete flexural strength |
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