CN108863149A - A kind of preparation method of high-strength concrete expansion agent material - Google Patents
A kind of preparation method of high-strength concrete expansion agent material Download PDFInfo
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- CN108863149A CN108863149A CN201810872240.9A CN201810872240A CN108863149A CN 108863149 A CN108863149 A CN 108863149A CN 201810872240 A CN201810872240 A CN 201810872240A CN 108863149 A CN108863149 A CN 108863149A
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- agent material
- strength concrete
- expansion 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
- C04B40/0046—Premixtures of ingredients characterised by their processing, e.g. sequence of mixing the ingredients when preparing the premixtures
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/0068—Ingredients with a function or property not provided for elsewhere in C04B2103/00
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention relates to a kind of preparation methods of high-strength concrete expansion agent material, belong to swelling agent field of material technology.Technical solution of the present invention uses starch and fatty acid for modified material,Since Starch-lipid acid compound does not dissolve in sour solvable in alkali,Thus Starch-lipid acid compound can precipitate in acid condition and coat diatomite particle,Form Starch-lipid acid modification infusorial earth aggregation,Diatomite can be coated,Form it into effective cladding,In use,By the refinement of magnesium solid impurity particle and coating modification of grinding,Increase the surface area that magnesium slag is contacted with water,The primary lattice of magnesium solid impurity particle is promoted to be distorted or destroy,Generate the high new surface of energy,Increase the irregular and defect level of structure,The chemical activity of magnesium slag is increased,Magnesium slag and flyash can be filled in the gap of aggregate and hydrated cementitious,Refine hole,Reduce porosity,Improve pore structure,Increase compactness,The mechanical property of further modified expanded agent material.
Description
Technical field
The present invention relates to a kind of preparation methods of high-strength concrete expansion agent material, belong to swelling agent material technology neck
Domain.
Background technique
With the gradually intensification of coal mining depth, the situation is tense for Safety of Coal Mine Production.During coal mine sealing of hole, cement base
Sealing material application is more universal.There is dry the problems such as shrinking in cement material, drilling top is caused to form " crescent " hole,
Shorten effective sealing of hole segment length, improves drilling inside and outside a possibility that penetrating through crack gas leakage, drilling and sealing is caused to fail.Scientific research personnel
A large amount of research work is carried out for cement base sealing material, the method for common addition expansive agent for cement slurry improves its dilatancy
Energy.Swelling agent can compensate for concrete reduced because of drying shrinkage caused by dehydration in hardening process and because of temperature caused by shrinkage, reduce
The generation in crack.Its main Types has calcium sulphoaluminate class swelling agent and oxide-based swelling agent, is also had according to the difference of expansion sources
Single expansion sources, double expansion sources and more expansion sources swelling agents.Wherein with aluminium sulfate class or it is compound with calcium oxide compound
Swelling agent using relatively broad, and magnesia class expanding material in hydraulic large-volume concrete using more.Some researches show that：
Largely in the plastic stage of concrete, the later period goes out expansion energy caused by calcium sulphoaluminate class and calcium oxide expansion agents for consumption
Existing shrinkage phenomenon；And magnesia class swelling agent aquation is slow, expansion stable period is longer.
Drated calcium aluminate crystal is formed after aluminium sulfate expansion agent series aquation（That is entringite）, but its aquation and expansion speed
Degree is very fast, swell increment is big, and concentrates on 3 ~ 14d, will appear contraction after 28d.At 70 ~ 80 DEG C or so, there may be decomposition, are pressing
Under the effect of power water, dissolution, migration and recrystallization easily occurs, causes the relaxation of swelling stress, physicochemical properties are unstable, uncomfortable
Close compensation water conservancy project concrete shrinkage.The expansion of calcium oxide expansion agent series occurs mainly in 3 ~ 14d after concreting, expanded
Fastly, expansion process adjustability is poor, almost without expansion after 28d；For its expansion sources under pressure water action, solubility is also larger,
Occur shrinkage phenomenon after 60d, reduces the durability of concrete.Mass concrete early stage elasticity modulus is lower, is added above-mentioned two
Kind swelling agent is also easy to produce swelling cracking；Late expansion amount is smaller, and the temperature drop that cannot compensate the later period is shunk.Tracking Data tool
There is delayed microswelling characteristic, expand between main generation 28d ~ 90d, small, expansion stabilization after 90d is expanded before 28d.But at present still
There are some outstanding problems to restrict the development and popularization of technique.First, it is Ministry of Metallurgical Industry that MgO material used in now, which is mainly,
What pupil produced, produced exclusively for road, bridge and hydraulic engineering, and many is related to the key parameter of concrete expansion performance
The requirement of mass concrete can't be met well, there are also certain difference, especially intensity side for the ideal expansion of distance
Face is not able to satisfy the demand of existing development, so it is necessary for carrying out sufficient modification to it.
Summary of the invention
The technical problems to be solved by the invention：It is asked for the existing combined oxidation magnesium expansive agent for cement slurry strength of materials is bad
Topic, provides a kind of preparation method of high-strength concrete expansion agent material.
In order to solve the above technical problems, the technical solution adopted by the present invention is that：
（1）According to parts by weight, 45~50 parts of lime, 25~30 parts of magnesium slags and 10~15 parts of flyash are weighed respectively be placed in stirring
It in machine, is stirred and is placed in ball grinder, ball milling, sieving obtain sieving powder, collect mixed-powder；
（2）In mass ratio 1:15,200 mesh blast-furnace cinder powder are added in deionized water, simultaneously ultrasonic disperse is stirred, receives
Collect dispersion liquid；
（3）In mass ratio 1:10, cornstarch is added in deionized water, is stirred and the gelatinization that heats up, dextrin is collected
And pH to 10.0 is adjusted, 6~8h is stood, modified starch dextrin is collected to obtain, according to parts by weight, weighs 45~50 parts points respectively
Dispersion liquid, 10~15 parts of 15% sodium humate solutions of mass fraction, 10~15 parts of fatty acid and 45~50 parts of modified starch dextrins
It is placed in blender, is stirred and insulation reaction, standing are cooled to room temperature, adjust pH to 3.0, filter and collect filter cake, wash
It washs and collects washings；
（4）According to parts by weight, respectively weigh 45~50 parts of 5% sodium humate solutions of mass fraction, 10~15 parts of washings and
10~15 parts of mixed-powders are placed in blender, are stirred and are collected mixed serum, mixed serum is poured into mold, very
Vacuum freecing-dry is simultaneously ground, and crosses 200 meshes, can be prepared into the high-strength concrete expansion agent material.
Step（1）The sieving Specific Surface Area Measurement is 300~350m2/kg。
Step（3）The heating gelatinization point is 85~90 DEG C.
Step（3）The adjusting pH to 3.0 is using 15% hydrochloric acid of mass fraction.
The present invention is compared with other methods, and advantageous effects are：
（1）Technical solution of the present invention uses flyash, lime and cinder for material modification preparation, passes through the aluminium oxide in flyash
The calcium hydroxide and anhydrite generated with hydrated reaction of cement generates entringite and generates expansion, simultaneous oxidation silicon and calcium hydroxide
Reaction generates C-S-H gel, simultaneously, the addition of lime a certain amount of calcium hydroxide can be generated, both can produce certain swollen
It is swollen, and supplemented with calcium hydroxide in cement system, the weak base state of system is improved, the generation of entringite, Ke Yida are conducive to
To the composite expanded effect of ettringite-calcium oxide, the thermogenetic shrinkage of hydrated cementitious and autogenous shrinkage, but also compensation coagulation had not only been compensated for
The shrinkage performance of soil；
（2）Technical solution of the present invention uses starch and fatty acid for modified material, since Starch-lipid acid compound is insoluble in acid
Alkali is dissolved in, thus Starch-lipid acid compound can precipitate in acid condition and coat diatomite particle, form starch-rouge
Fat acid modification infusorial earth aggregation, can coat diatomite, form it into effective cladding, well in use, by powder
The refinement of magnesium solid impurity particle and coating modification of mill, increase the surface area that magnesium slag is contacted with water, promote the primary lattice hair of magnesium solid impurity particle
Raw distortion destroys, and generates the high new surface of energy, increases the irregular and defect level of structure, so that the chemistry of magnesium slag is living
Performance increases, and magnesium slag and flyash can be filled in the gap of aggregate and hydrated cementitious, refines hole, reduces porosity,
Improve pore structure, increases compactness, the mechanical property of further modified expanded agent material.
Specific embodiment
According to parts by weight, 45~50 parts of lime, 25~30 parts of magnesium slags and 10~15 parts of flyash are weighed respectively to be placed in and stir
It mixes in machine, is stirred and is placed in ball grinder, at 250~300r/min after 3~5h of ball milling, cross 200 meshes, obtain sieving powder
End simultaneously controls ball milling specific surface area as 300~350m2/kg, collects mixed-powder；In mass ratio 1:15, by 200 mesh blast-furnace cinders
Powder is added in deionized water, is stirred and is placed in 10~15min of ultrasonic disperse under 200~300W, and dispersion liquid is collected；It presses
Mass ratio 1:10, cornstarch is added in deionized water, be stirred be placed at 85~90 DEG C stirring gelatinization 55~
60min collects dextrin and adjusts pH to 10.0 with 5% sodium hydroxide solution of mass fraction, stands 6~8h, collect modified
Starch gelatinization liquid；According to parts by weight, it is molten that 45~50 parts of dispersion liquids, 10~15 parts of 15% sodium humates of mass fraction are weighed respectively
Liquid, 10~15 parts of fatty acid and 45~50 parts of modified starch dextrins are placed in blender, are stirred and are placed in 40~45 DEG C
25~30min of lower insulation reaction, standing are cooled to room temperature, and with 15% hydrochloric acid condition pH to 3.0 of mass fraction, are filtered and are collected filter
Cake is rinsed to cleaning solution pH with deionized water and is in neutrality, and collects washings and according to parts by weight, respectively 45~50 parts of matter of weighing
Amount 5% sodium humate solution of score, 10~15 parts of washings and 10~15 parts of mixed-powders are placed in blender, are stirred simultaneously
Mixed serum is collected, mixed serum is poured into mold, vacuum freeze drying is simultaneously ground, and is crossed 200 meshes, can be prepared
Obtain the high-strength concrete expansion agent material.
According to parts by weight, it weighs 45 parts of lime, 25 parts of magnesium slags and 10 parts of flyash respectively to be placed in blender, stirring is mixed
Merging is placed in ball grinder, at 250r/min after ball milling 3h, crosses 200 meshes, must be sieved powder and controls ball milling specific surface area
For 300m2/ kg collects mixed-powder；In mass ratio 1:15,200 mesh blast-furnace cinder powder are added in deionized water, are stirred
Mixing is placed in ultrasonic disperse 10min under 200W, collects dispersion liquid；In mass ratio 1:10, cornstarch is added to deionization
It in water, is stirred and is placed at 85 DEG C stirring gelatinization 55min, collect dextrin and with 5% sodium hydroxide solution of mass fraction
PH to 10.0 is adjusted, 6h is stood, collects to obtain modified starch dextrin；According to parts by weight, 45 parts of dispersion liquids, 10 parts are weighed respectively
15% sodium humate solution of mass fraction, 10 parts of fatty acid and 45 parts of modified starch dextrins are placed in blender, are stirred
It is placed in insulation reaction 25min, standing at 40 DEG C to be cooled to room temperature, with 15% hydrochloric acid condition pH to 3.0 of mass fraction, filtering is simultaneously
Filter cake is collected, is rinsed with deionized water to cleaning solution pH and is in neutrality, collects washings and according to parts by weight, respectively 45 parts of weighing
5% sodium humate solution of mass fraction, 10 parts of washings and 10 parts of mixed-powders are placed in blender, are stirred and are collected mixed
Slurries are closed, mixed serum is poured into mold, vacuum freeze drying is simultaneously ground, and crosses 200 meshes, can be prepared into described
High-strength concrete expansion agent material.
According to parts by weight, it weighs 47 parts of lime, 27 parts of magnesium slags and 12 parts of flyash respectively to be placed in blender, stirring is mixed
Merging is placed in ball grinder, at 275r/min after ball milling 4h, crosses 200 meshes, must be sieved powder and controls ball milling specific surface area
For 325m2/ kg collects mixed-powder；In mass ratio 1:15,200 mesh blast-furnace cinder powder are added in deionized water, are stirred
Mixing is placed in ultrasonic disperse 12min under 250W, collects dispersion liquid；In mass ratio 1:10, cornstarch is added to deionization
It in water, is stirred and is placed at 87 DEG C stirring gelatinization 57min, collect dextrin and with 5% sodium hydroxide solution of mass fraction
PH to 10.0 is adjusted, 7h is stood, collects to obtain modified starch dextrin；According to parts by weight, 47 parts of dispersion liquids, 12 parts are weighed respectively
15% sodium humate solution of mass fraction, 12 parts of fatty acid and 47 parts of modified starch dextrins are placed in blender, are stirred
It is placed in insulation reaction 27min, standing at 42 DEG C to be cooled to room temperature, with 15% hydrochloric acid condition pH to 3.0 of mass fraction, filtering is simultaneously
Filter cake is collected, is rinsed with deionized water to cleaning solution pH and is in neutrality, collects washings and according to parts by weight, respectively 47 parts of weighing
5% sodium humate solution of mass fraction, 12 parts of washings and 12 parts of mixed-powders are placed in blender, are stirred and are collected mixed
Slurries are closed, mixed serum is poured into mold, vacuum freeze drying is simultaneously ground, and crosses 200 meshes, can be prepared into described
High-strength concrete expansion agent material.
According to parts by weight, it weighs 50 parts of lime, 30 parts of magnesium slags and 15 parts of flyash respectively to be placed in blender, stirring is mixed
Merging is placed in ball grinder, at 300r/min after ball milling 5h, crosses 200 meshes, must be sieved powder and controls ball milling specific surface area
For 350m2/ kg collects mixed-powder；In mass ratio 1:15,200 mesh blast-furnace cinder powder are added in deionized water, are stirred
Mixing is placed in ultrasonic disperse 15min under 300W, collects dispersion liquid；In mass ratio 1:10, cornstarch is added to deionization
It in water, is stirred and is placed at 90 DEG C stirring gelatinization 60min, collect dextrin and with 5% sodium hydroxide solution of mass fraction
PH to 10.0 is adjusted, 8h is stood, collects to obtain modified starch dextrin；According to parts by weight, 50 parts of dispersion liquids, 15 parts are weighed respectively
15% sodium humate solution of mass fraction, 15 parts of fatty acid and 50 parts of modified starch dextrins are placed in blender, are stirred
It is placed in insulation reaction 30min, standing at 45 DEG C to be cooled to room temperature, with 15% hydrochloric acid condition pH to 3.0 of mass fraction, filtering is simultaneously
Collect filter cake, rinsed with deionized water to cleaning solution pH and be in neutrality, collect washings and according to parts by weight, respectively weighing 45~
50 parts of 5% sodium humate solutions of mass fraction, 15 parts of washings and 15 parts of mixed-powders are placed in blender, are stirred and are received
Collect mixed serum, mixed serum is poured into mold, vacuum freeze drying is simultaneously ground, and is crossed 200 meshes, can be prepared into
The high-strength concrete expansion agent material.
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, expansion agent material prepared by the present invention has excellent mechanical property.
Claims (4)
1. a kind of preparation method of high-strength concrete expansion agent material, it is characterised in that specifically preparation step is：
（1）According to parts by weight, 45~50 parts of lime, 25~30 parts of magnesium slags and 10~15 parts of flyash are weighed respectively be placed in stirring
It in machine, is stirred and is placed in ball grinder, ball milling, sieving obtain sieving powder, collect mixed-powder；
（2）In mass ratio 1:15,200 mesh blast-furnace cinder powder are added in deionized water, simultaneously ultrasonic disperse is stirred, receives
Collect dispersion liquid；
（3）In mass ratio 1:10, cornstarch is added in deionized water, is stirred and the gelatinization that heats up, dextrin is collected
And pH to 10.0 is adjusted, 6~8h is stood, modified starch dextrin is collected to obtain, according to parts by weight, weighs 45~50 parts points respectively
Dispersion liquid, 10~15 parts of 15% sodium humate solutions of mass fraction, 10~15 parts of fatty acid and 45~50 parts of modified starch dextrins
It is placed in blender, is stirred and insulation reaction, standing are cooled to room temperature, adjust pH to 3.0, filter and collect filter cake, wash
It washs and collects washings；
（4）According to parts by weight, respectively weigh 45~50 parts of 5% sodium humate solutions of mass fraction, 10~15 parts of washings and
10~15 parts of mixed-powders are placed in blender, are stirred and are collected mixed serum, mixed serum is poured into mold, very
Vacuum freecing-dry is simultaneously ground, and crosses 200 meshes, can be prepared into the high-strength concrete expansion agent material.
2. a kind of preparation method of high-strength concrete expansion agent material according to claim 1, it is characterised in that：Step
（1）The sieving Specific Surface Area Measurement is 300~350m2/kg。
3. a kind of preparation method of high-strength concrete expansion agent material according to claim 1, it is characterised in that：Step
（3）The heating gelatinization point is 85~90 DEG C.
4. a kind of preparation method of high-strength concrete expansion agent material according to claim 1, it is characterised in that：Step
（3）The adjusting pH to 3.0 is using 15% hydrochloric acid of mass fraction.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810872240.9A CN108863149A (en) | 2018-08-02 | 2018-08-02 | A kind of preparation method of high-strength concrete expansion agent material |
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| CN201810872240.9A CN108863149A (en) | 2018-08-02 | 2018-08-02 | A kind of preparation method of high-strength concrete expansion agent material |
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| CN108863149A true CN108863149A (en) | 2018-11-23 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107417157A (en) * | 2017-06-13 | 2017-12-01 | 芜湖瑞德机械科技有限公司 | Starch conversion gypsum base cement expansive material and preparation method thereof and application |
-
2018
- 2018-08-02 CN CN201810872240.9A patent/CN108863149A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107417157A (en) * | 2017-06-13 | 2017-12-01 | 芜湖瑞德机械科技有限公司 | Starch conversion gypsum base cement expansive material and preparation method thereof and application |
Non-Patent Citations (2)
| Title |
|---|
| 尚尉等: "淀粉-脂肪酸复合物包覆改性硅藻土的制备及表征", 《中国造纸学报》 * |
| 崔素萍等: "利用镁渣制备混凝土膨胀剂的性能研究", 《新型建筑材料》 * |
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Application publication date: 20181123 |