CN107162480A - A kind of preparation method of modified concrete swelling agent - Google Patents
A kind of preparation method of modified concrete swelling agent Download PDFInfo
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- CN107162480A CN107162480A CN201710565361.4A CN201710565361A CN107162480A CN 107162480 A CN107162480 A CN 107162480A CN 201710565361 A CN201710565361 A CN 201710565361A CN 107162480 A CN107162480 A CN 107162480A
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- preparation
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- modified
- swelling agent
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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
Abstract
A kind of preparation method of modified concrete swelling agent, including following preparation process：A, nickel slag, desulfurated plaster and aluminous fly-ash be well mixed, ball milling obtains powder；B, nano-calcium carbonate and nano magnesia are entered into horizontal high voltage roll and be well mixed, be watered and reconcile into slurries, heating stirring, which is mixed, is simultaneously added dropwise γ aminopropyl triethoxysilanes, and Heat preservation obtains activated sludge；C, the activated sludge of step a powder and step b is well mixed, adds modified solution A, dried again after stirring and obtain mixture one；D, by mixture one be well mixed with modified solution B dry after, you can obtain finished product.The preparation method of the present invention is simple, and the expansion rate of the swelling agent of preparation is consistent with concrete strength development, and the concrete quality after hardening is good, and compressive property, fracture resistance are excellent, with good economic benefit and environmental benefit.
Description
Technical field
The invention belongs to building material technical field, and in particular to a kind of preparation method of modified concrete swelling agent.
Background technology
Cement expansive material is a kind of with generating entringite, calcium hydroxide or calcium alum through hydration reaction after cement, water mix
Stone and calcium hydroxide, make concrete produce the additive of volumetric expansion, are mainly used in underground structure, liquid material reservoir,
High intensity highway pavement, bridge concrete surface layer, culvert, the neck such as prefabricated components, the anchor of frame structure joint, pipe joint
Domain.Function for the swelling agent in cement or cement concrete is the concrete after hardening is produced certain volumetric expansion,
Reduce the contraction fissure that cement or cement concrete hardened early are produced.
Concrete is in initial stage or hardening process is condensed, the problems such as due to cement itself aquation or dehydration so that concrete
There is the phenomenon that drying shrinkage, shrinkage and own vol shrink in structure.When shrinkage value is more than the limit stretch value of concrete, it will break
The structure of bad concrete, causes cracking.Cement expansive material is as a kind of new concrete additive, and it can be with cement, water
Reaction produces the crystallization that volume becomes big, expands volume of concrete, produces certain prestressing force, helps to control the contraction of concrete
Cracking, protects concrete structure.At present, the wide variety of cement expansive material, the invention of application number 201510107822.4 is special
Profit application discloses the expansive agent for concrete that a kind of raw materials such as use magnesium slag are made, and can solve existing swelling agent and be unsuitable for benefit
Repay the problem of large volume concrete for hydraulic structure shrinks；The application for a patent for invention of Application No. 201310720154.3 discloses one kind and adopted
The environment-friendly type concrete cracking resistance swelling agent being made of raw materials such as fluorine gypsum powder, flyash, cracking resistance mending-leakage effect is good；Application No.
201510198236.5 application for a patent for invention discloses a kind of concrete high-efficiency for using waste residue containing aluminum i ndustry to be made for raw material
Swelling agent, active al2o3 stripping quantity is more, and expansion performance is higher.Although current cement expansive material has been obtained for extensively
Using, but cement expansive material currently on the market has that expansion rate is not high, and expansion rate and concrete strength un-coordinated development are swollen
The problems such as continuous stability of swollen effect is poor.
China circulate in the market wide cement expansive material surely belong to based on entringite aluminium sulfate type expansion
Agent, this kind of entringite type swelling agent early expansion plays too fast characteristic and determines this kind of cement expansive material only in limitation bar
Competence exertion is acted under part, that is, limits expansion compensation confined shrinkage, and it limits or limited to a large amount of no-reinforcing-bars in current building trade
The less engineering of condition processed or part-structure (road, wall) do not have due compensating action.And such concrete expansion
Compensation of the agent to contraction occurs mainly in aquation early stage, and the middle and later periods shrinkage-compensating effect to cement-based material is not obvious.
In summary, it is therefore desirable to which a kind of more preferable cement expansive material improves the deficiencies in the prior art.
The content of the invention
It is an object of the invention to provide a kind of preparation method of modified concrete swelling agent, preparation method letter of the invention
Single, the expansion rate of the swelling agent of preparation is consistent with concrete strength development, and the concrete quality after hardening is good, compressive property, anti-
Excellent performance is rolled over, with good economic benefit and environmental benefit.
The invention provides following technical scheme：
A kind of preparation method of modified concrete swelling agent, including following preparation process：
A, nickel slag, desulfurated plaster and aluminous fly-ash be well mixed, with ball mill ball milling 30-50min, obtain powder；
B, nano-calcium carbonate and nano magnesia are entered into horizontal high voltage roll and be well mixed, then be watered and reconcile into concentration and be
60-80% slurries, are warming up to 150-180 DEG C, stirring mixes and the slurries gross mass 5-9% ethoxy of γ-aminopropyl three is added dropwise
Base silane, Heat preservation 40-60min, obtains activated sludge；
C, the activated sludge of step a powder and step b is well mixed, modified solution A added, in 1000-
30-50min is stirred under 1200r/min mixing speed, then is placed in drying at 60-80 DEG C, mixture one is obtained；
D, by mixture one and modified solution B by volume 2:7 are mixed and stirred for uniform, the dry 3-4h at 60-80 DEG C
Afterwards, you can obtain finished product.
It is preferred that, the modified concrete swelling agent includes the raw material of following parts by weight：28-35 parts of nickel slag, desulfurated plaster
22-28 parts, 19-26 parts of aluminous fly-ash, 24-35 parts of nano-calcium carbonate, 28-32 parts of nano magnesia, 45-56 parts of water, γ-ammonia
B15-20 parts of 18-24 parts of propyl-triethoxysilicane, A12-22 parts of modified solution and modified solution.
It is preferred that, the desulfurated plaster of the step a be in 160-180 DEG C of steam curing box, after steam curing 2-3 days,
Be placed in Muffle furnace, under nitrogen protection, 220-250 DEG C be heated to it, control heating rate for 5-8 DEG C/
After min, calcining 30-40min, continue to heat up to heat and it is calcined, it is 5-10 DEG C/min to control heating rate, treats that temperature rises to
After 800-1000 DEG C, insulation calcining 40-60min then stands and is cooled to normal temperature, is prepared.
It is preferred that, the modified solution A of the step c is that phenol is added in absolute ethyl alcohol, and stirring mixes and pH is added dropwise
Conditioning agent, regulation pH value of solution is subsequently heated to 4-5.5 and is warming up to 50-65 DEG C, stirring mixing 20-25min is prepared into modification molten
Liquid.
It is preferred that, the phenol with to absolute ethyl alcohol by volume 2:5 mixing.
It is preferred that, the pH adjusting agent is the hydrochloric acid solution that mass concentration is 15-18%.
It is preferred that, the modified solution B of the step d presses solid-to-liquid ratio 1 for microcrystalline cellulose with dichloromethane stirring:3 mixing
Afterwards, then add protection liquid stir it is obtained.
It is preferred that, the protection liquid is mixed to prepare by the stirring of deionized water, gelatin and APES.
The beneficial effects of the invention are as follows：
The preparation method of the present invention is simple, and modified expanded dose of expansion rate of preparation is consistent with concrete strength development, firmly
Concrete quality after change is good, and compressive property, fracture resistance are excellent, with good economic benefit and environmental benefit.
Nickel slag, desulfurated plaster, flyash used in the present invention derive from industrial solid castoff, abundance, cost
It is cheap, the effective recycling to nickel slag is realized, added value of product is high.
Modified concrete swelling agent prepared by the present invention has higher free swelling rate, and expansion effect is lasting, stably,
Can be with the contraction produced by each age of effective compensation concrete.
The short preparation period of the present invention, it is simple to operate.There is no particular/special requirement to Preparation equipment, therefore be adapted to the big rule of industrialization
Mould is manufactured.
Embodiment
Embodiment 1
A kind of preparation method of modified concrete swelling agent, including following preparation process：
A, nickel slag, desulfurated plaster and aluminous fly-ash be well mixed, with ball mill ball milling 30-50min, obtain powder；
B, nano-calcium carbonate and nano magnesia are entered into horizontal high voltage roll and be well mixed, then be watered and reconcile into concentration and be
60% slurries, are warming up to 150 DEG C, stirring mixes and the gamma-aminopropyl-triethoxy-silane of slurries gross mass 7% is added dropwise, and protects
Temperature heating 60min, obtains activated sludge；
C, the activated sludge of step a powder and step b is well mixed, modified solution A added, in 1200r/min
Mixing speed under stir 50min, then be placed at 60 DEG C and dry, obtain mixture one；
D, by mixture one and modified solution B by volume 2:7 are mixed and stirred for uniformly, drying after 3h at 80 DEG C, i.e.,
It can obtain finished product.
Modified concrete swelling agent includes the raw material of following parts by weight：35 parts of nickel slag, 28 parts of desulfurated plaster, aluminous fly-ash
26 parts, 35 parts of nano-calcium carbonate, 32 parts of nano magnesia, 56 parts of water, 24 parts of gamma-aminopropyl-triethoxy-silane, modified solution
A22 parts and B20 parts of modified solution.
Step a desulfurated plaster is in 180 DEG C of steam curing boxes, after steam curing 2 days, to be placed in Muffle furnace,
Under nitrogen protection, 250 DEG C are heated to it, it is 8 DEG C/min to control heating rate, is calcined after 40min, continuing to heat up adds
Heat is calcined to it, and it is 10 DEG C/min to control heating rate, after temperature rises to 1000 DEG C, insulation calcining 40min, is then stood cold
But to normal temperature, it is prepared.
Step c modified solution A is that phenol is added in absolute ethyl alcohol, and stirring mixes and pH adjusting agent is added dropwise, and is adjusted
PH value of solution is subsequently heated to 5.5 and is warming up to 50 DEG C, stirring mixing 25min is prepared into modified solution.
Phenol with to absolute ethyl alcohol by volume 2:5 mixing.
PH adjusting agent is the hydrochloric acid solution that mass concentration is 18%.
Step d modified solution B is that microcrystalline cellulose presses solid-to-liquid ratio 1 with dichloromethane stirring:After 3 mixing, then add guarantor
Shield liquid stirs obtained.
Protection liquid is mixed to prepare by the stirring of deionized water, gelatin and APES.
Embodiment 2
A kind of preparation method of modified concrete swelling agent, including following preparation process：
A, nickel slag, desulfurated plaster and aluminous fly-ash be well mixed, with ball mill ball milling 50min, obtain powder；
B, nano-calcium carbonate and nano magnesia are entered into horizontal high voltage roll and be well mixed, then be watered and reconcile into concentration and be
60% slurries, are warming up to 180 DEG C, stirring mixes and the gamma-aminopropyl-triethoxy-silane of slurries gross mass 9% is added dropwise, and protects
Temperature heating 60min, obtains activated sludge；
C, the activated sludge of step a powder and step b is well mixed, modified solution A added, in 1000r/min
Mixing speed under stir 50min, then be placed at 60 DEG C and dry, obtain mixture one；
D, by mixture one and modified solution B by volume 2:7 are mixed and stirred for uniformly, drying after 4h at 80 DEG C, i.e.,
It can obtain finished product.
Modified concrete swelling agent includes the raw material of following parts by weight：28 parts of nickel slag, 28 parts of desulfurated plaster, aluminous fly-ash
19 parts, 24 parts of nano-calcium carbonate, 32 parts of nano magnesia, 45 parts of water, 18 parts of gamma-aminopropyl-triethoxy-silane, modified solution
A12 parts and B20 parts of modified solution.
Step a desulfurated plaster is in 180 DEG C of steam curing boxes, after steam curing 3 days, to be placed in Muffle furnace,
Under nitrogen protection, 220 DEG C are heated to it, it is 8 DEG C/min to control heating rate, is calcined after 30min, continuing to heat up adds
Heat is calcined to it, and it is 10 DEG C/min to control heating rate, after temperature rises to 1000 DEG C, insulation calcining 60min, is then stood cold
But to normal temperature, it is prepared.
Step c modified solution A is that phenol is added in absolute ethyl alcohol, and stirring mixes and pH adjusting agent is added dropwise, and is adjusted
PH value of solution is subsequently heated to 4 and is warming up to 65 DEG C, stirring mixing 25min is prepared into modified solution.
Phenol with to absolute ethyl alcohol by volume 2:5 mixing.
PH adjusting agent is the hydrochloric acid solution that mass concentration is 18%.
Step d modified solution B is that microcrystalline cellulose presses solid-to-liquid ratio 1 with dichloromethane stirring:After 3 mixing, then add guarantor
Shield liquid stirs obtained.
Protection liquid is mixed to prepare by the stirring of deionized water, gelatin and APES.
The product prepared by embodiment 1 and embodiment two is detected, data as shown in the table are obtained：
Table one：
| Project | Embodiment 1 | Embodiment 2 |
| 7 days free swelling rate/% | 0.2385 | 0.2126 |
| 28 days free swelling rate/% | 0.2723 | 0.2423 |
| 7 days compression strength/MPa | 56.4 | 53.6 |
| 28 days compression strength/MPa | 71.3 | 64.8 |
| 7 days rupture strength/MPa | 7.8 | 7.1 |
| 28 days rupture strength/MPa | 8.2 | 7.8 |
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, although with reference to foregoing reality
Apply example the present invention is described in detail, for those skilled in the art, it still can be to foregoing each implementation
Technical scheme described in example is modified, or carries out equivalent substitution to which part technical characteristic.All essences in the present invention
God is with principle, and any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (8)
1. a kind of preparation method of modified concrete swelling agent, it is characterised in that including following preparation process：
A, nickel slag, desulfurated plaster and aluminous fly-ash be well mixed, with ball mill ball milling 30-50min, obtain powder；
B, nano-calcium carbonate and nano magnesia are entered into horizontal high voltage roll and be well mixed, then be watered and reconcile into concentration for 60-80%
Slurries, be warming up to 150-180 DEG C, stirring mixes and slurries gross mass 5-9% gamma-aminopropyl-triethoxy-silane is added dropwise, and protects
Temperature heating 40-60min, obtains activated sludge；
C, the activated sludge of step a powder and step b is well mixed, modified solution A added, in 1000-1200r/min
Mixing speed under stir 30-50min, then be placed at 60-80 DEG C and dry, obtain mixture one；
D, by mixture one and modified solution B by volume 2:7 are mixed and stirred for uniformly, drying after 3-4h at 60-80 DEG C, i.e.,
It can obtain finished product.
2. the preparation method of a kind of modified concrete swelling agent according to claim 1, it is characterised in that the modification is mixed
Solidifying soil expansion agent includes the raw material of following parts by weight：28-35 parts of nickel slag, 22-28 parts of desulfurated plaster, 19-26 parts of aluminous fly-ash,
24-35 parts of nano-calcium carbonate, 28-32 parts of nano magnesia, 45-56 parts of water, 18-24 parts of gamma-aminopropyl-triethoxy-silane, change
Property 12-22 parts of solution A and B15-20 parts of modified solution.
3. a kind of preparation method of modified concrete swelling agent according to claim 1, it is characterised in that the step a
Desulfurated plaster be in 160-180 DEG C of steam curing box, after steam curing 2-3 days, to be placed in Muffle furnace, protected in nitrogen
Under shield, 220-250 DEG C is heated to it, it is 5-8 DEG C/min to control heating rate, is calcined after 30-40min, continues to heat up
Heating is calcined to it, and it is 5-10 DEG C/min to control heating rate, after temperature rises to 800-1000 DEG C, insulation calcining 40-
60min, then stands and is cooled to normal temperature, be prepared.
4. a kind of preparation method of modified concrete swelling agent according to claim 1, it is characterised in that the step c
Modified solution A be that phenol is added in absolute ethyl alcohol, stirring, which is mixed, is simultaneously added dropwise pH adjusting agent, regulation pH value of solution to 4-5.5,
It is subsequently heated and is warming up to 50-65 DEG C, stirring mixing 20-25min is prepared into modified solution.
5. a kind of preparation method of modified concrete swelling agent according to claim 1, it is characterised in that the phenol with
To absolute ethyl alcohol by volume 2:5 mixing.
6. a kind of preparation method of modified concrete swelling agent according to claim 4, it is characterised in that the pH regulations
Agent is the hydrochloric acid solution that mass concentration is 15-18%.
7. a kind of preparation method of modified concrete swelling agent according to claim 1, it is characterised in that the step d
Modified solution B press solid-to-liquid ratio 1 for the stirring of microcrystalline cellulose and dichloromethane:After 3 mixing, then add the protection liquid system of stirring
.
8. a kind of preparation method of modified concrete swelling agent according to claim 7, it is characterised in that the protection liquid
It is mixed to prepare by the stirring of deionized water, gelatin and APES.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710565361.4A CN107162480A (en) | 2017-07-12 | 2017-07-12 | A kind of preparation method of modified concrete swelling agent |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710565361.4A CN107162480A (en) | 2017-07-12 | 2017-07-12 | A kind of preparation method of modified concrete swelling agent |
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| CN107162480A true CN107162480A (en) | 2017-09-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109437637A (en) * | 2018-12-12 | 2019-03-08 | 盐城市国泰混凝土有限公司 | A kind of steel slag matter expansive agent for cement slurry and the portland-type cement for adulterating the swelling agent |
| CN109553320A (en) * | 2018-12-12 | 2019-04-02 | 盐城市国泰混凝土有限公司 | A kind of nickel slag expansive agent for cement slurry and the portland-type cement for adulterating the swelling agent |
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| CN105254203A (en) * | 2015-09-24 | 2016-01-20 | 滁州京安工贸有限责任公司 | Concrete and mortar expanding agent |
| CN105669081A (en) * | 2016-03-15 | 2016-06-15 | 常州市阿曼特化工有限公司 | Preparation method of modified kaolin slow release expanding agent |
| CN106116200A (en) * | 2016-06-27 | 2016-11-16 | 盐城工学院 | Nickel dreg concrete extender, preparation technology and concrete |
| CN106220016A (en) * | 2016-07-22 | 2016-12-14 | 盐城工学院 | Nickel slag base concrete extender, preparation technology and concrete |
-
2017
- 2017-07-12 CN CN201710565361.4A patent/CN107162480A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105254203A (en) * | 2015-09-24 | 2016-01-20 | 滁州京安工贸有限责任公司 | Concrete and mortar expanding agent |
| CN105669081A (en) * | 2016-03-15 | 2016-06-15 | 常州市阿曼特化工有限公司 | Preparation method of modified kaolin slow release expanding agent |
| CN106116200A (en) * | 2016-06-27 | 2016-11-16 | 盐城工学院 | Nickel dreg concrete extender, preparation technology and concrete |
| CN106220016A (en) * | 2016-07-22 | 2016-12-14 | 盐城工学院 | Nickel slag base concrete extender, preparation technology and concrete |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109437637A (en) * | 2018-12-12 | 2019-03-08 | 盐城市国泰混凝土有限公司 | A kind of steel slag matter expansive agent for cement slurry and the portland-type cement for adulterating the swelling agent |
| CN109553320A (en) * | 2018-12-12 | 2019-04-02 | 盐城市国泰混凝土有限公司 | A kind of nickel slag expansive agent for cement slurry and the portland-type cement for adulterating the swelling agent |
| CN109437637B (en) * | 2018-12-12 | 2021-06-22 | 盐城市国泰混凝土有限公司 | Steel slag cement expanding agent and silicate cement doped with same |
| CN109553320B (en) * | 2018-12-12 | 2021-07-27 | 盐城市国泰混凝土有限公司 | Nickel slag cement expanding agent and silicate cement doped with same |
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Application publication date: 20170915 |