CN109133699A - A kind of preparation method of durable high-strength composite expansive agents for concrete material - Google Patents
A kind of preparation method of durable high-strength composite expansive agents for concrete material Download PDFInfo
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- CN109133699A CN109133699A CN201811078481.2A CN201811078481A CN109133699A CN 109133699 A CN109133699 A CN 109133699A CN 201811078481 A CN201811078481 A CN 201811078481A CN 109133699 A CN109133699 A CN 109133699A
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- ball milling
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- concrete
- preparation
- durable high
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Classifications
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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
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C13/00—Fibre or filament compositions
- C03C13/06—Mineral fibres, e.g. slag wool, mineral wool, rock wool
-
- 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/46—Rock wool ; Ceramic or silicate fibres
- C04B14/4643—Silicates other than zircon
- C04B14/4675—Silicates other than zircon from slags
Abstract
The present invention relates to a kind of preparation methods of durable high-strength composite expansive agents for concrete material, belong to swelling agent technical field.Technical solution of the present invention uses sepiolite raw ore powder for raw material, it is modified through acidolysis, sepiolite fibre beam is stripped out from powder particles, and compound blast-furnace cinder melt drawing forms high-specific surface area fibre bundle aggregate, it is compound as network skeleton and to keep the chemical stability and mechanical strength of blast furnace dry slag fiber, by loading water absorbent gel there are pore structure between composite fibre and filling to material internal, make its in use effectively water suction and it is expansion-modifying, since technical solution of the present invention uses combined oxidation magnesium, enough swell incremenies are provided by the early expansion amount of combined oxidation magnesium, the later period can the reaction was continued generate expansion, so concrete structure will not be destroyed because of early expansion amount excessive generation stress relaxation, and the contraction of compensating concrete can be continued, it is effectively improved the endurance quality of expansion agent material.
Description
Technical field
The present invention relates to a kind of preparation methods of durable high-strength composite expansive agents for concrete material, belong to swelling agent technology
Field.
Background technique
Concrete learns skill with section as modern age most widely used construction material and current most large artificial material
What art was maked rapid progress is constantly progressive, and is also furtherd investigate constantly, and performance has also obtained constantly improve and development.However coagulation
Soil has following two intrinsic material characteristics first, being gain in strength during hydration and hardening for other materials
The contraction distortion of simultaneous volume the second is concrete material, tensile and compressive strength it is relatively low, i.e., axial tensile-strength is much
Lower than axial compression strength.When contraction distortion is drawn, and the tensile stress of the inside concrete risen is more than the tensile strength of concrete, mix
Solidifying soil cracking may occur now, as, therefore have been generally acknowledged that contraction fissure is the greatest drawback of concrete structure.Concrete is split
Seam is by very thin, and for small micro-crack to several millimeters, change width range is very big.Visible macrocrack is in most cases
Damage, the appearance of bad structure, to the stress performance and durability of works, influence not for influence caused by crack itself
It can be very big.But it will bring it is impervious it is poor, intensity is insufficient, material is uneven and other issues, and then promote harmful environmental Jie
Matter such as hydrone, carbon dioxide and chloride ion etc. quickly invade inside concrete, cause the nature of steel bar corrosion or concrete
Aging to reduce the security performance and service life of works, therefore controls the crack of concrete structure with very heavy
The meaning wanted.
Since cement expansive material comes out, different expansion rates can be obtained by adjusting the expansive agent dosage in concrete
Concrete.According to the size of concrete expansion rate, expansive concrete or self-stressing concretes can be made, it is mixed for offsetting
The wholly or largely contraction distortion of soil is coagulated, to can avoid or mitigate significantly the generation of concrete cracks, improves concrete
Durability.Currently used cement expansive material can be divided into according to the chemical composition of expansion sources: aluminium sulfate series, calcium oxide
Series and magnesia expansion agent series etc..Existing MgO expansion agent materials ' durability can be poor, so carrying out to it effectively
Modification is necessary.
Summary of the invention
The technical problems to be solved by the invention: it for the problem that existing swelling agent materials ' durability energy is poor, provides
A kind of preparation method of durable high-strength composite expansive agents for concrete material.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
(1) ball milling after taking sepiolite and washing, dry, collects ball milling particle, and 1:5 in mass ratio stirs ball milling particle with hydrochloric acid
Mixing is mixed, insulation reaction, standing is cooled to room temperature, and lower sediment is collected in centrifuge separation；
(2) lower sediment, blast-furnace cinder and combined oxidation magnesium granules are stirred, after 1~2h of ball milling by 1:1:1 in mass ratio
It collects mixing and ball milling particle to be placed in crucible, after crucible drying, then the heating that heats up, heat preservation calcining are collected molten liquid and simultaneously drawn
Silk processing, collects wire drawing fiber and cooled to room temperature, obtains modified fibre；
(3) according to parts by weight, respectively weigh 45~50 parts of acrylamides, 0.1~0.2 part of crosslinking agent cumyl peroxide,
0.5~1.0 part of 1% potassium persulfate solution of mass fraction and 1~2 part of odium stearate are placed in conical flask, are stirred and are protected
Temperature reaction, collects reaction solution；
(4) 1:10 in mass ratio, modified fibre is added in reaction solution, mixed grinding, is collected grinding milk and is placed in by spraying
In drying device, it is spray-dried and collects dry particle, standing is cooled to room temperature, and it is multiple can be prepared into the durable high-strength
Close concrete expansion agent material.
Concentration of hydrochloric acid described in step (1) is 0.1% hydrochloric acid of mass fraction.
Crucible drying temperature described in step (2) is 120~125 DEG C.
Heating described in step (2), which is heated to be, is heated to 1400~1500 DEG C by 5 DEG C/min heating.
Spray drying described in step (4) is that control inlet temperature is 175~220 DEG C, and outlet temperature is 200~250 DEG C,
Spray drying.
The present invention is compared with other methods, and advantageous effects are:
Technical solution of the present invention uses sepiolite raw ore powder for raw material, modified through acidolysis, and sepiolite fibre beam is from powder particles
In be stripped out, and compound blast-furnace cinder melt drawing formed high-specific surface area fibre bundle aggregate, due in blast-furnace cinder
The presence of SiO2 makes it as network skeleton and keeps the chemical stability and mechanical strength of blast furnace dry slag fiber, by compound
The pore structure load water absorbent gel of existing acid-modified formation between fiber is simultaneously filled to material internal, it was being used
It effectively absorbs water in journey and expansion-modifying, since technical solution of the present invention uses combined oxidation magnesium, passes through the morning of combined oxidation magnesium
Phase swell increment provides enough swell incremenies, the later period can the reaction was continued generates expansion, so will not be excessive because of early expansion amount
It generates stress relaxation and destroys concrete structure, and the contraction of compensating concrete can be continued, be effectively improved the resistance to of expansion agent material
Long performance.
Specific embodiment
10~12h of ball milling after taking sepiolite and washing, dry collects ball milling particle, 1:5 in mass ratio, by ball milling particle
It is stirred with 0.1% hydrochloric acid of mass fraction and is placed in 10~12h of insulation reaction, standing at 75~80 DEG C and is cooled to room temperature, then
Be centrifugated 10~15min at 1200~1500r/min, collect lower sediment and 1:1:1 in mass ratio, by lower sediment,
Blast-furnace cinder is stirred with combined oxidation magnesium granules, and mixing and ball milling particle is collected after 1~2h of ball milling and is placed in crucible, by earthenware
After crucible is placed at 120~125 DEG C dry 3~5h, then heats up by 5 DEG C/min and be heated to 1400~1500 DEG C, 1~2h of heat preservation calcining
Afterwards, molten liquid and wire drawing process are collected, wire drawing fiber and cooled to room temperature is collected, obtains modified fibre；According to parts by weight,
45~50 parts of acrylamides, 0.1~0.2 part of crosslinking agent cumyl peroxide, 0.5~1.0 part of mass fraction 1% are weighed respectively
Potassium persulfate solution and 1~2 part of odium stearate are placed in conical flask, are stirred and are placed in insulation reaction 3 at 75~80 DEG C
~5h collects reaction solution and 1:10 in mass ratio, modified fibre is added in reaction solution, after 2~3h of mixed grinding, collection is ground
Grinding slurry is placed in spray-drying installation, and control inlet temperature is 175~220 DEG C, and outlet temperature is 200~250 DEG C, spraying
Dry particle is dried and collects, standing is cooled to room temperature, and can be prepared into the durable high-strength composite expansive agents for concrete
Material；The combined oxidation magnesium granules are 1:1 in mass ratio, by the compound mixed oxidization of light calcined magnesia and dead burned magnesia
Magnesium granules.
Ball milling 10h after taking sepiolite and washing, dry collects ball milling particle, 1:5 in mass ratio, by ball milling particle and matter
Amount 0.1% hydrochloric acid of score, which is stirred, to be placed in insulation reaction 10h, standing at 75 DEG C and is cooled to room temperature, then at 1200r/min
It is centrifugated 10min, lower sediment and 1:1:1 in mass ratio are collected, by lower sediment, blast-furnace cinder and combined oxidation magnesium granules
It is stirred, mixing and ball milling particle is collected after ball milling 1h and is placed in crucible, after crucible is placed at 120 DEG C dry 3h, then press 5
DEG C/min heating is heated to 1400 DEG C, after heat preservation calcining 1h, collects molten liquid and wire drawing process, collect wire drawing fiber and naturally cold
But to room temperature, modified fibre is obtained；According to parts by weight, 45 parts of acrylamides, 0.1 part of crosslinking agent peroxidating diisopropyl are weighed respectively
Benzene, 0.5 part of 1% potassium persulfate solution of mass fraction and 1 part of odium stearate are placed in conical flask, are stirred and are placed in 75 DEG C
Lower insulation reaction 3h collects reaction solution and 1:10 in mass ratio, modified fibre is added in reaction solution, after mixed grinding 2h,
It collects grinding milk to be placed in spray-drying installation, control inlet temperature is 175 DEG C, and outlet temperature is 200 DEG C, spray drying
And dry particle is collected, standing is cooled to room temperature, and can be prepared into the durable high-strength composite expansive agents for concrete material；
The combined oxidation magnesium granules are 1:1 in mass ratio, by the compound mixed oxidization magnesium of light calcined magnesia and dead burned magnesia
Grain.
Ball milling 11h after taking sepiolite and washing, dry collects ball milling particle, 1:5 in mass ratio, by ball milling particle and matter
Amount 0.1% hydrochloric acid of score, which is stirred, to be placed in insulation reaction 11h, standing at 77 DEG C and is cooled to room temperature, then in 13500r/min
Lower centrifuge separation 13min collects lower sediment and 1:1:1 in mass ratio, by lower sediment, blast-furnace cinder and combined oxidation magnesium
Grain is stirred, and mixing and ball milling particle is collected after ball milling 1.5h and is placed in crucible, after crucible is placed at 123 DEG C dry 4h,
1450 DEG C, after 1.5h is calcined in heat preservation are heated to by 5 DEG C/min heating again, collects molten liquid and wire drawing process, collects wire drawing fiber
And cooled to room temperature, obtain modified fibre；According to parts by weight, 47 parts of acrylamides, 0.15 part of crosslinking agent mistake are weighed respectively
Oxidation diisopropylbenzene (DIPB), 0.75 part of 1% potassium persulfate solution of mass fraction and 1.5 parts of odium stearate are placed in conical flask, are stirred
Mixing is placed in insulation reaction 4h at 77 DEG C, collects reaction solution and 1:10 in mass ratio, modified fibre is added in reaction solution,
It after mixed grinding 2.5h, collects grinding milk and is placed in spray-drying installation, control inlet temperature is 200 DEG C, outlet temperature
It is 225 DEG C, is spray-dried and collects dry particle, standing is cooled to room temperature, and it is compound can be prepared into the durable high-strength
Concrete expansion agent material；The combined oxidation magnesium granules are 1:1 in mass ratio, and light calcined magnesia and dead burned magnesia are answered
The mixed oxidization magnesium granules of conjunction.
Ball milling 12h after taking sepiolite and washing, dry collects ball milling particle, 1:5 in mass ratio, by ball milling particle and matter
Amount 0.1% hydrochloric acid of score, which is stirred, to be placed in insulation reaction 12h, standing at 80 DEG C and is cooled to room temperature, then at 1500r/min
It is centrifugated 15min, lower sediment and 1:1:1 in mass ratio are collected, by lower sediment, blast-furnace cinder and combined oxidation magnesium granules
It is stirred, mixing and ball milling particle is collected after ball milling 2h and is placed in crucible, after crucible is placed at 125 DEG C dry 5h, then press 5
DEG C/min heating is heated to 1500 DEG C, after heat preservation calcining 2h, collects molten liquid and wire drawing process, collect wire drawing fiber and naturally cold
But to room temperature, modified fibre is obtained；According to parts by weight, 50 parts of acrylamides, 0.2 part of crosslinking agent peroxidating diisopropyl are weighed respectively
Benzene, 1.0 parts of 1% potassium persulfate solutions of mass fraction and 2 parts of odium stearate are placed in conical flask, are stirred and are placed in 80 DEG C
Lower insulation reaction 5h collects reaction solution and 1:10 in mass ratio, modified fibre is added in reaction solution, after mixed grinding 3h,
It collects grinding milk to be placed in spray-drying installation, control inlet temperature is 220 DEG C, and outlet temperature is 250 DEG C, spray drying
And dry particle is collected, standing is cooled to room temperature, and can be prepared into the durable high-strength composite expansive agents for concrete material；
The combined oxidation magnesium granules are 1:1 in mass ratio, by the compound mixed oxidization magnesium of light calcined magnesia and dead burned magnesia
Grain.
Example 1,2,3 prepared by the present invention is tested for the property, specific test result is as follows shown in table table 1:
1 performance test table of table
As seen from the above table, swelling agent prepared by the present invention has excellent endurance quality.
Claims (5)
1. a kind of preparation method of durable high-strength composite expansive agents for concrete material, it is characterised in that specific preparation step are as follows:
(1) ball milling after taking sepiolite and washing, dry, collects ball milling particle, and 1:5 in mass ratio stirs ball milling particle with hydrochloric acid
Mixing is mixed, insulation reaction, standing is cooled to room temperature, and lower sediment is collected in centrifuge separation；
(2) lower sediment, blast-furnace cinder and combined oxidation magnesium granules are stirred, after 1~2h of ball milling by 1:1:1 in mass ratio
It collects mixing and ball milling particle to be placed in crucible, after crucible drying, then the heating that heats up, heat preservation calcining are collected molten liquid and simultaneously drawn
Silk processing, collects wire drawing fiber and cooled to room temperature, obtains modified fibre；
(3) according to parts by weight, respectively weigh 45~50 parts of acrylamides, 0.1~0.2 part of crosslinking agent cumyl peroxide,
0.5~1.0 part of 1% potassium persulfate solution of mass fraction and 1~2 part of odium stearate are placed in conical flask, are stirred and are protected
Temperature reaction, collects reaction solution；
(4) 1:10 in mass ratio, modified fibre is added in reaction solution, mixed grinding, is collected grinding milk and is placed in by spraying
In drying device, it is spray-dried and collects dry particle, standing is cooled to room temperature, and it is multiple can be prepared into the durable high-strength
Close concrete expansion agent material.
2. according to right want 1 described in a kind of preparation method of durable high-strength composite expansive agents for concrete material, feature exists
In: concentration of hydrochloric acid described in step (1) is 0.1% hydrochloric acid of mass fraction.
3. according to right want 1 described in a kind of preparation method of durable high-strength composite expansive agents for concrete material, feature exists
In: crucible drying temperature described in step (2) is 120~125 DEG C.
4. according to right want 1 described in a kind of preparation method of durable high-strength composite expansive agents for concrete material, feature exists
In: heating described in step (2), which is heated to be, is heated to 1400~1500 DEG C by 5 DEG C/min heating.
5. according to right want 1 described in a kind of preparation method of durable high-strength composite expansive agents for concrete material, feature exists
In: spray drying described in step (4) is that control inlet temperature is 175~220 DEG C, and outlet temperature is 200~250 DEG C, spraying
It is dry.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811078481.2A CN109133699A (en) | 2018-09-17 | 2018-09-17 | A kind of preparation method of durable high-strength composite expansive agents for concrete material |
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| CN201811078481.2A CN109133699A (en) | 2018-09-17 | 2018-09-17 | A kind of preparation method of durable high-strength composite expansive agents for concrete material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113336467A (en) * | 2021-07-22 | 2021-09-03 | 南京晶磊兴建材有限公司 | Low-alkali waterproof anti-cracking expanding agent |
| CN116514460A (en) * | 2023-03-28 | 2023-08-01 | 加固邦(上海)新材料科技有限公司 | Early-strength grouting material for structural reinforcement |
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| EP3310738A1 (en) * | 2015-06-18 | 2018-04-25 | EMPA Eidgenössische Materialprüfungs- und Forschungsanstalt | Self-prestressed reinforced concrete elements |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113336467A (en) * | 2021-07-22 | 2021-09-03 | 南京晶磊兴建材有限公司 | Low-alkali waterproof anti-cracking expanding agent |
| CN116514460A (en) * | 2023-03-28 | 2023-08-01 | 加固邦(上海)新材料科技有限公司 | Early-strength grouting material for structural reinforcement |
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