CN108545975A - A kind of modified SILICA FUME of gunite concrete - Google Patents
A kind of modified SILICA FUME of gunite concrete Download PDFInfo
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- CN108545975A CN108545975A CN201810391061.3A CN201810391061A CN108545975A CN 108545975 A CN108545975 A CN 108545975A CN 201810391061 A CN201810391061 A CN 201810391061A CN 108545975 A CN108545975 A CN 108545975A
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- silica fume
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/146—Silica fume
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
-
- 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
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
-
- 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)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of modified SILICA FUMEs of gunite concrete, belong to gunite concrete cementitious material field, count by weight ratio, which is made of following components：100 parts of SILICA FUME；15 parts of metakaolin；0.5 1 parts of water-reducing agent；13 parts of alkali-activator；0.5 1 parts of sodium hydroxide；0.5 1 parts of sugar calcium retarder；0.1 0.3 parts of triethanolamine；0.5 1 parts of polyacrylamide；0.5 1 parts of cellulose ether；The present invention can significantly improve the workability of concrete, stick poly- property and anti-bleeding, reduce rebound of shotcrete rate and cracking risk, the intensity for improving concrete hardening object early stage and later stage, improves concrete hole gap structure, improves gunite concrete anti-permeability performance and durability.
Description
Technical field
The invention belongs to gunite concrete cementitious material fields, and in particular to a kind of modified micro- silicon of gunite concrete
Powder.
Background technology
Gunite concrete refers to utilizing compressed air or other power, by cement, sand, stone, accelerator, additive and water etc.
What raw material were worked good by a certain percentage mixes and stirs material, by pipeline, and be ejected at a high speed by spray plane condensation hardening and
At a kind of concrete.In the liner supporting Structural Engineering of some large area, concrete spraying support and traditional supporting shape
Formula, which is compared, unrivaled superiority.But that there are rebound degrees is high for gunite concrete, dust is big, low strength, easy to crack, anti-
It oozes and the problems such as durability is poor, causes construction environment severe, surrouding rock deformation is big, and design service life is not achieved in support engineering, easily
There is a series of problems, such as water seepage of tunnel.
Invention content
That there are rebound degrees it is an object of the invention to being directed to above-mentioned gunite concrete is high, dust is big, low strength, Yi Kai
It splits, impervious and poor durability problem, the present invention provides a kind of gunite concrete modified SILICA FUME.
The technical solution adopted by the present invention is as follows：
A kind of modified SILICA FUME of gunite concrete, is counted, which is made of following components by weight ratio：
This programme has the beneficial effect that：The workability of concrete can be significantly improved, stick poly- property and anti-bleeding, reduced
Rebound of shotcrete rate and cracking risk improve the intensity in concrete hardening object early stage and later stage, improve concrete pore knot
Structure improves gunite concrete anti-permeability performance and durability.
SILICA FUME contains a large amount of SiO2, a large amount of SiO is contained in metakaolin2And Al2O3, provided instead for hydration reaction
Answer object；Water-reducing agent prepares the usage amount of moisture during concrete for reduction, reduces SILICA FUME and metakaolin in water
To the demand of water when dissolving；Alkali-activator is used as catalyst, promotes SiO2And Al2O3Hydration reaction occurs, it is early to improve concrete
Phase and later strength；Sodium hydroxide is dissolved in the water so that entire concrete is in alkaline environment, enhances the catalytic of alkali-activator
Energy；Sugar calcium retarder is used to delay the hydration reaction of cement, extends the setting time of concrete；Triethanolamine is as a kind of cement
Early strength agent has catalytic action to the hydration reaction of cement so that the aquation of C3A accelerates, and accelerates the shape of entringite and C-S-H gels
At consuming a large amount of mixing water, accelerate the formation of Behavior of Hardened Cement Paste and rapidly change to cubic, simultaneously because soluble complexing
The formation of object reduces the concentration of Ca2+ and Al3+ in cement mortar, to promote the reaction of other cement minerals；Polyacrylamide
Amine and hydroxypropyl methyl cellulose ether can significantly improve concrete mix consistency, increase and stick poly- property, reduce rebound, improve coagulation
The adhesive property of native mixture and country rock improves stability and the safety of support engineering.
Preferably, specific surface area >=18000m of the SILICA FUME2/ kg, average grain diameter≤300nm, water demand ratio≤
115%, 28d activity index >=120%.
The SILICA FUME of this specification, it is soluble easily in water, and can be by active component SiO therein2It releases, increases SiO2
The specific surface area of grain so that catalysis reaction can be carried out thoroughly, for enhancing concrete early stage and later strength.
Preferably, the metakaolin is ultra-fine metakaolin, and table is compared in average particle size≤2.1 μm of ultra-fine metakaolin
Area >=600m2/ kg, 28d activity index >=110%.
Ultra-fine metakaolin is soluble easily in water, can be by SiO therein2And Al2O3It fully releases, and big ratio table
Area can accelerate the speed of hydration reaction.
Preferably, the water-reducing agent is polycarboxylate water-reducer powder, water-reducing rate >=30%.
Polycarboxylate water-reducer is soluble easily in water, and concrete slump loss can be prevented without causing apparent slow setting, low-dosage
It is lower to play higher plasticizing effect；Using the polycarboxylate water-reducer powder of water-reducing rate >=30% so that SILICA FUME and metakaolin
Water consumption do not increase.
Preferably, the alkali-activator is powdered potassium silicate, and fineness is 300 mesh.
Potassium silicate is soluble in water, ionizes out potassium ion, and potassium element is active alkali metal element, can excite SiO2With
Al2O3In each chemical bond fast fracture, to accelerate SiO2And Al2O3Hydration reaction；The potassium silicate of 300 mesh can be quick
It is dissolved in water and can thoroughly be dissolved in water and form aqueous solution.
Preferably, the cellulose ether is hydroxypropyl methyl cellulose ether, and the molecular weight of hydroxypropyl methyl cellulose ether is
100000.
On the one hand the hydroxypropyl methyl cellulose ether that molecular weight is 100,000 disclosure satisfy that the performance requirement in terms of construction, another
Aspect, hydrophilic radical therein is more, so it is soluble easily in water, so that concrete has good viscosity.
In conclusion by adopting the above-described technical solution, the beneficial effects of the invention are as follows：Concrete can be significantly improved
Workability sticks poly- property and anti-bleeding, reduces rebound of shotcrete rate and cracking risk, improves concrete hardening object early stage
And the intensity in later stage, improve concrete hole gap structure, improves gunite concrete anti-permeability performance and durability.
Specific implementation mode
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.The present invention is made specifically with reference to specific embodiment
It is bright.
Embodiment one
Select specific surface area >=18000m2/ kg, average grain diameter≤300nm, water demand ratio≤115%, 28d activity indexs
>=120% SILICA FUME, specific surface area >=600m2The ultra-fine metakaolin of/kg, 28d activity index >=110%, water-reducing rate >=
30% polycarboxylate water-reducer powder, fineness are the potassium silicate of 300 mesh, the hydroxypropyl methyl cellulose ether that molecular weight is 100,000；
By 100 parts following of above-mentioned SILICA FUME of mass fraction；15 parts of ultra-fine metakaolin；Polycarboxylate water-reducer powder 0.5
Part；1 part of potassium silicate；0.5 part of sodium hydroxide；0.5 part of sugar calcium retarder；0.1 part of triethanolamine；0.5 part of polyacrylamide and
0.5 part of hydroxypropyl methyl cellulose ether, which is uniformly mixed, forms product one, measures the specific surface area of product one, average grain diameter, needs water
Amount ratio and 28d activity indexs.
Embodiment two
By 100 parts following of SILICA FUME of mass fraction；15 parts of metakaolin；0.5 part of water-reducing agent；1 part of alkali-activator；Hydrogen-oxygen
Change 0.5 part of sodium；0.5 part of sugar calcium retarder；0.1 part of triethanolamine；The 0.5 part of mixing of 0.5 part of polyacrylamide and cellulose ether
It is formed uniformly product two, measures specific surface area, average grain diameter, water demand ratio and the 28d activity indexs of product two.
Embodiment three
By 100 parts following of SILICA FUME of mass fraction；15 parts of metakaolin；0.8 part of water-reducing agent；2.0 parts of alkali-activator；Hydrogen
0.8 part of sodium oxide molybdena；0.8 part of sugar calcium retarder；0.2 part of triethanolamine；0.75 part of 0.7 part of polyacrylamide and cellulose ether are mixed
Conjunction is formed uniformly product three, measures specific surface area, average grain diameter, water demand ratio and the 28d activity indexs of product three.
Example IV
By 100 parts following of SILICA FUME of mass fraction；15 parts of metakaolin；1 part of water-reducing agent；3 parts of alkali-activator；Hydroxide
1 part of sodium；1 part of sugar calcium retarder；0.3 part of triethanolamine；1 part of 1 part of polyacrylamide and cellulose ether are uniformly mixed and form production
Product four measure specific surface area, average grain diameter, water demand ratio and the 28d activity indexs of product four.
Embodiment five
480 kilograms of cement, 30 kilograms of sands, 40 kilograms of stones, 24 kilograms of solidifying agent and 75 kilograms of water are mixed and stirred for
Uniformly, the slump, arch rebound degree and the resistance to compression for measuring the concrete are slight.
Embodiment six
On the basis of embodiment one, the present embodiment by embodiment one be uniformly mixed 38.4 kilograms of modification SILICA FUME,
75 kilograms of 480 kilograms of cement, 30 kilograms of sand, 40 kilograms of stone, 24 kilograms of solidifying agent and water are mixed and stirred for uniformly, and measuring should
The slump of concrete, arch rebound degree and resistance to compression are slight.
The property indices testing result table of each product in 1. one~example IV of embodiment of table
The 2. application effect of products table of comparisons of the present invention of table
As shown in Table 1, the comparison of product one and product two is it is found that select specific surface area >=18000m2/ kg, average grain diameter
The SILICA FUME of≤300nm, water demand ratio≤115%, 28d activity index >=120%, specific surface area >=600m2/ kg, 28d activity
The ultra-fine metakaolin of index >=110%, the polycarboxylate water-reducer powder of water-reducing rate >=30%, fineness are the potassium silicate of 300 mesh
And the hydroxypropyl methyl cellulose ether that molecular weight is 100,000 is as the constituent component for being modified SILICA FUME, the specific surface of product one
All indicators are better than products two for product, average grain diameter, water demand ratio and 28d activity indexs, so it is preferred that with specific surface area >=
18000m2The SILICA FUME of/kg, average grain diameter≤300nm, water demand ratio≤115%, 28d activity index >=120%, specific surface
Product >=600m2The ultra-fine metakaolin of/kg, 28d activity index >=110%, the polycarboxylate water-reducer powder of water-reducing rate >=30%,
Fineness is the potassium silicate of 300 mesh and hydroxypropyl methyl cellulose ether that molecular weight is 100,000 significantly improve it is concrete and easy
Property, stick poly- property and anti-bleeding, reduce rebound of shotcrete rate and cracking risk, improve concrete hardening object early stage and after
The intensity of phase improves concrete hole gap structure, improves gunite concrete anti-permeability performance and durability.
Each component it can be seen from the indices result that product two, product three and product four in table 1 measure
Content is higher, and the properties of modified SILICA FUME are better.
As shown in Table 2, the slump, arch rebound degree and the compression strength for adding the concrete of modified SILICA FUME are superior to
The performance of the concrete of modified SILICA FUME is not added, significantly improves the workability of concrete, stick poly- property and anti-bleeding, reduce
Rebound of shotcrete rate and cracking risk improve the intensity in concrete hardening object early stage and later stage, improve concrete pore knot
Structure improves gunite concrete anti-permeability performance and durability.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (6)
1. a kind of modified SILICA FUME of gunite concrete, which is characterized in that count by weight ratio, the modification SILICA FUME is by following
Component is made：
The slave power about proportioning can suitably be increased.
2. the modified SILICA FUME of gunite concrete according to claim 1, it is characterised in that：The specific surface of the SILICA FUME
Product >=18000m2/ kg, average grain diameter≤300nm, water demand ratio≤115%, 28d activity index >=120%.
3. the modified SILICA FUME of gunite concrete according to claim 1, it is characterised in that：The metakaolin is ultra-fine
Metakaolin, specific surface area >=600m2/ kg, 28d activity index >=110%.
4. the modified SILICA FUME of gunite concrete according to claim 1, it is characterised in that：The water-reducing agent is polycarboxylic acids
Water-reducing agent powder, water-reducing rate >=30%.
5. the modified SILICA FUME of gunite concrete according to claim 1, it is characterised in that：The alkali-activator is powder
The potassium silicate of shape, fineness are 300 mesh.
6. the modified SILICA FUME of gunite concrete according to claim 1, it is characterised in that：The cellulose ether is hydroxypropyl
The molecular weight of ylmethyl cellulose ether, hydroxypropyl methyl cellulose ether is 100,000.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109265034A (en) * | 2018-11-09 | 2019-01-25 | 中国水利水电第七工程局有限公司 | A kind of wet shotcreting nanoscale admixture and its application method |
| CN109320118A (en) * | 2018-11-09 | 2019-02-12 | 中国水利水电第七工程局有限公司 | The dry spray of one kind or half wet shotcreting nanoscale admixture and its application method |
| CN111606625A (en) * | 2020-05-29 | 2020-09-01 | 张红卫 | Formula and preparation method of C70 high-strength self-compacting concrete |
| CN112374800A (en) * | 2020-11-13 | 2021-02-19 | 衡阳市银利实业有限公司 | Material for reducing cement and improving concrete strength |
| CN112441760A (en) * | 2020-11-26 | 2021-03-05 | 中交武汉港湾工程设计研究院有限公司 | Composite admixture for sprayed concrete and preparation method and application thereof |
| CN114804749A (en) * | 2022-04-29 | 2022-07-29 | 中铁三局集团有限公司 | Superfine modified silica micropowder low-resilience high-early-strength wet-spraying concrete and construction method thereof |
| CN114890762A (en) * | 2022-03-24 | 2022-08-12 | 武汉源锦建材科技有限公司 | Composite admixture for improving durability of sprayed concrete and preparation method thereof |
| CN114920491A (en) * | 2022-06-06 | 2022-08-19 | 中交四航工程研究院有限公司 | Rebound-reducing shotcrete admixture and preparation method thereof |
| CN115073054A (en) * | 2022-07-21 | 2022-09-20 | 北京建筑大学 | High-strength ultrafine additive for shotcrete, preparation method and use method thereof, low-resilience shotcrete and preparation method thereof |
| CN116283036A (en) * | 2023-02-22 | 2023-06-23 | 水利部交通运输部国家能源局南京水利科学研究院 | Sprayed concrete modifier and preparation method and application thereof |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109265034A (en) * | 2018-11-09 | 2019-01-25 | 中国水利水电第七工程局有限公司 | A kind of wet shotcreting nanoscale admixture and its application method |
| CN109320118A (en) * | 2018-11-09 | 2019-02-12 | 中国水利水电第七工程局有限公司 | The dry spray of one kind or half wet shotcreting nanoscale admixture and its application method |
| CN109265034B (en) * | 2018-11-09 | 2021-12-28 | 中国水利水电第七工程局有限公司 | Wet-spraying concrete nano-grade admixture and use method thereof |
| CN109320118B (en) * | 2018-11-09 | 2021-12-28 | 中国水利水电第七工程局有限公司 | Dry-spraying or wet-spraying concrete nano-grade admixture and use method thereof |
| CN111606625A (en) * | 2020-05-29 | 2020-09-01 | 张红卫 | Formula and preparation method of C70 high-strength self-compacting concrete |
| CN112374800A (en) * | 2020-11-13 | 2021-02-19 | 衡阳市银利实业有限公司 | Material for reducing cement and improving concrete strength |
| CN112441760A (en) * | 2020-11-26 | 2021-03-05 | 中交武汉港湾工程设计研究院有限公司 | Composite admixture for sprayed concrete and preparation method and application thereof |
| CN114890762A (en) * | 2022-03-24 | 2022-08-12 | 武汉源锦建材科技有限公司 | Composite admixture for improving durability of sprayed concrete and preparation method thereof |
| CN114804749A (en) * | 2022-04-29 | 2022-07-29 | 中铁三局集团有限公司 | Superfine modified silica micropowder low-resilience high-early-strength wet-spraying concrete and construction method thereof |
| CN114920491A (en) * | 2022-06-06 | 2022-08-19 | 中交四航工程研究院有限公司 | Rebound-reducing shotcrete admixture and preparation method thereof |
| CN115073054A (en) * | 2022-07-21 | 2022-09-20 | 北京建筑大学 | High-strength ultrafine additive for shotcrete, preparation method and use method thereof, low-resilience shotcrete and preparation method thereof |
| CN116283036A (en) * | 2023-02-22 | 2023-06-23 | 水利部交通运输部国家能源局南京水利科学研究院 | Sprayed concrete modifier and preparation method and application thereof |
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