CN108793809A - Concrete accelerator and preparation method thereof - Google Patents
Concrete accelerator and preparation method thereof Download PDFInfo
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- CN108793809A CN108793809A CN201811063992.7A CN201811063992A CN108793809A CN 108793809 A CN108793809 A CN 108793809A CN 201811063992 A CN201811063992 A CN 201811063992A CN 108793809 A CN108793809 A CN 108793809A
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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
- C04B40/0046—Premixtures of ingredients characterised by their processing, e.g. sequence of mixing the ingredients when preparing the premixtures
-
- 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
- C04B2103/10—Accelerators; Activators
- C04B2103/12—Set accelerators
Abstract
The present invention relates to a kind of concrete accelerator and preparation method thereof, raw material components by weight, including：Natural minerals 20-30 parts by weight, aluminum oxide clinker 45-60 parts by weight, reinforcing agent 5-10 parts by weight and thickener 6-8 parts by weight；Preparation method includes step：By each raw material component accurate weighing in proportion, natural minerals and aluminum oxide clinker are transported to through transport system in roll squeezer later, and processing is crushed under the pressure roller effect mutually squeezed；By after crushing mixture and other surplus stock components mix and be made spherical, then roasted；Mixture after roasting is transported to ball milling in ball mill, obtains concrete accelerator.Concrete accelerator provided by the invention, strong to cement adaptability, alkalinity is weak, and cohesive force is strong, and rebound of shotcrete rate is small；Concrete after mixing can generate microdilatancy in hardening process, can improve the density, impermeability and durability of concrete.
Description
Technical field
The present invention relates to building material technical fields, and in particular to a kind of concrete accelerator and preparation method thereof.
Background technology
In recent years, with the development of national economy, building material industry development in China's is swift and violent, wherein the especially demand of concrete
Amount is very big, but concrete, under common execution conditions, condensation is slow, and curing time is long, and construction speed is slow, is not suitable with modern construction
Requirement.In order to accelerate efficiency, a variety of concrete accelerators are being had developed in recent decades both at home and abroad, the utilization of accelerator can
The effective setting time for reducing cement to reduce the duration, speeds up the work.And speed is invented for the first time from the 1930s
Since solidifying agent, the development and utilization of accelerator are very fast.But the development of China's accelerator is but relatively slower, the accelerator in China
Mainly with " Red Star-Ι types " and " 728 type " for representative.However, accelerator on the market is mostly alkaline accelerator at present, although alkali
Property accelerator can have a preferable rapid hardening effect, but it is long；And existing accelerator often exist with base adhesive power it is weak, return
The shortcomings of bullet rate is strong, impervious poor, and contraction distortion is big.Based on this, a kind of concrete rapid hardening of novel good combination property is provided
Agent can increase the market competitiveness for building material industry and provide advantage.
Invention content
For the defects in the prior art, present invention aims at providing a kind of concrete accelerator and preparation method thereof,
The concrete accelerator is strong to cement adaptability, and alkalinity is weak, and cohesive force is strong, and rebound of shotcrete rate is small；Coagulation after mixing
Soil can generate microdilatancy in hardening process, can improve the density, impermeability and durability of concrete.
To achieve the above object, technical solution provided by the invention is：
The present invention provides a kind of concrete accelerator, raw material components by weight, including：Natural minerals 20-30 weights
Measure part, aluminum oxide clinker 45-60 parts by weight, reinforcing agent 5-10 parts by weight and thickener 6-8 parts by weight.
Preferably, the raw material components of concrete accelerator by weight, including：25 parts by weight of natural minerals, alumina are ripe
Expect 7 parts by weight of 52 parts by weight, 8 parts by weight of reinforcing agent and thickener.
Preferably, the raw material components of natural minerals by weight, including：Dolomite 35-45 parts by weight, quick lime 4-8
Parts by weight, calcite 1-3 parts by weight, basalt 10-12 parts by weight and medical stone 15-20 parts by weight.
Preferably, the raw material components of reinforcing agent by weight, including：Anhydrous sodium sulphate 5-10 parts by weight, calcium chloride 20-25 weights
Measure part, potassium carbonate 5-8 parts by weight, sodium thiosulfate 2-6 parts by weight and triethanolamine 14-17 parts by weight.
The present invention also provides the preparation methods of concrete accelerator, including step：Each raw material component is accurate in proportion
It weighs, is later transported to natural minerals and aluminum oxide clinker in roll squeezer through transport system, and in the pressure roller effect mutually squeezed
Under crush processing；By after crushing mixture and other surplus stock components mix and be made spherical, then roasted；
Mixture after roasting is transported to ball milling in ball mill, obtains concrete accelerator.
Preferably, the grain diameter of the mixture after crushing is no more than 0.01mm.
Preferably, roasting specifically includes step：Spherical mixture is warming up to 200- with the heating rate of 1-2 DEG C/min
It 300 DEG C, then keeps the temperature 2-3h, then 800-860 DEG C is warming up to the heating rate of 0.5-0.8 DEG C/min, keep the temperature 10-12h, then with
The rate of temperature fall of 0.2-0.3 DEG C/min is cooled to 20-30 DEG C.
Preferably, the rotating speed of ball milling is 200-300r/min, and the time of ball milling is 4-5h.
It should be noted that the volume of concrete accelerator provided by the invention is the 3.0%- of binder total amount
5.0%.
Technical solution provided by the invention has following advantageous effect：
(1) concrete accelerator (novel TJ-10 concrete accelerators) provided by the invention, main function are to adjust concrete to coagulate
Knot, setting rate, mixing has good dispersion in concrete, early strength is high, and fast solidifying is strong with base adhesive power, rebound degree
Low, impervious good, the features such as contraction distortion is small is that the concrete projects such as a kind of repairing, rush construction, antiseepage, leak stopping, shotcrete are essential
Concrete accelerator；
(2) concrete accelerator provided by the invention, strong to cement adaptability, alkalinity is weak, and cohesive force is strong, gunite concrete
Rebound degree is small；Microdilatancy can be generated in hardening process by mixing the concrete of this product, improve the density of concrete, impermeability and
Durability；It should be directed to cement type used in engineering before use and carry out trial test, choose volume, can largely use；The present invention
The concrete accelerator of offer is not suitable with cement that is expired and not meeting national standard；The stringent control construction ratio of mud, reinforces early
Phase wet curing, it is ensured that later strength；Volume, the ratio of mud, temperature, humidity, cement type and label can all influence concrete
Setting time；Aqua product is corrosive to human skin, it is noted that safeguard procedures when use, it is long-term will appear when placing it is a small amount of
Sediment, but do not influence its performance, when use, should remove sediment；
(3) concrete accelerator provided by the invention can be widely applied to railway and vcehicular tunnel gunite concrete, under water
Concrete, leak stopping emergency work, mine working, cavern's bank protection, national defence water conservancy projects underground engineering, industry and civil buildings underground
The construction of the gunite concretes such as engineering.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obviously, or practice through the invention is recognized.
Specific implementation mode
Below in conjunction with the embodiment of the present invention, technical scheme of the present invention is clearly and completely described.Implement below
Example is only used for clearly illustrating technical scheme of the present invention, therefore be intended only as example, and cannot limit this hair with this
Bright protection domain.
Experimental method in following embodiments is unless otherwise specified conventional method.Examination as used in the following examples
Material is tested, is to be commercially available from regular shops unless otherwise specified.Quantitative test in following embodiment, is respectively provided with three
Secondary to repeat to test, data are the average value or mean+SD of three repeated experiments.
The each raw material component for preparing concrete accelerator of the present invention is according to parts by weight as matching, can be according to when producing
Corresponding ratio increases or reduces, as large-scale production can by kilogram or as unit of ton, small-scale production can also gram be single
Position, weight can increase or reduce, but the quality proportioning constant rate between each composition.
The present invention provides a kind of concrete accelerator, raw material components by weight, including：Natural minerals 20-30 weight
Part, aluminum oxide clinker 45-60 parts by weight, reinforcing agent 5-10 parts by weight and thickener 6-8 parts by weight；
Wherein, the raw material components of natural minerals by weight, including：Dolomite 35-45 parts by weight, quick lime 4-8 weights
Measure part, calcite 1-3 parts by weight, basalt 10-12 parts by weight and medical stone 15-20 parts by weight；
The raw material components of reinforcing agent by weight, including：Anhydrous sodium sulphate 5-10 parts by weight, calcium chloride 20-25 parts by weight, carbon
Sour potassium 5-8 parts by weight, sodium thiosulfate 2-6 parts by weight and triethanolamine 14-17 parts by weight.
In addition, the present invention also provides the preparation method of above-mentioned concrete accelerator, include the following steps：
By each raw material component accurate weighing in proportion, natural minerals and aluminum oxide clinker are transported to roller through transport system later
In press, and processing is crushed under the pressure roller effect mutually squeezed, the grain diameter of the mixture after crushing is no more than
0.01mm；
By after crushing mixture and other surplus stock components mix and be made spherical, then roasted；Wherein, it roasts
Burning specifically includes step：Spherical mixture is warming up to 200-300 DEG C with the heating rate of 1-2 DEG C/min, then keeps the temperature 2-
3h, then it is warming up to 800-860 DEG C with the heating rate of 0.5-0.8 DEG C/min, 10-12h is kept the temperature, then with 0.2-0.3 DEG C/min's
Rate of temperature fall is cooled to 20-30 DEG C；
Mixture after roasting is transported in ball mill, with the rotational speed of ball-mill ball milling 4-5h of 200-300r/min, is obtained
Concrete accelerator.
Concrete accelerator provided by the invention and preparation method thereof is described further with reference to specific embodiment.
Embodiment 1
The present embodiment provides a kind of concrete accelerator, raw material components by weight, including：25 weight of natural minerals
Part, 7 parts by weight of 50 parts by weight of aluminum oxide clinker, 8 parts by weight of reinforcing agent and thickener；
Wherein, the raw material components of natural minerals by weight, including：40 parts by weight of dolomite, 6 parts by weight of quick lime,
18 parts by weight of 2 parts by weight of calcite, 11 parts by weight of basalt and medical stone；
The raw material components of reinforcing agent by weight, including：7 parts by weight of anhydrous sodium sulphate, 23 parts by weight of calcium chloride, potassium carbonate 6
16 parts by weight of parts by weight, 4 parts by weight of sodium thiosulfate and triethanolamine.
Concrete accelerator is prepared using preparation method provided by the invention by above-mentioned raw material：
By each raw material component accurate weighing in proportion, natural minerals and aluminum oxide clinker are transported to roller through transport system later
In press, and processing is crushed under the pressure roller effect mutually squeezed, the grain diameter of the mixture after crushing is no more than
0.01mm；
By after crushing mixture and other surplus stock components mix and be made spherical, then roasted；Wherein, it roasts
Burning specifically includes step：Spherical mixture is warming up to 250 DEG C with the heating rate of 1.5 DEG C/min, then keeps the temperature 2.5h, then
830 DEG C are warming up to the heating rate of 0.6 DEG C/min, keeps the temperature 11h, then 25 DEG C are cooled to the rate of temperature fall of 0.25 DEG C/min；
Mixture after roasting is transported in ball mill, with the rotational speed of ball-mill ball milling 4.5h of 250r/min, obtains coagulation
Native accelerator.
Embodiment 2
The present embodiment provides a kind of concrete accelerator, raw material components by weight, including：20 weight of natural minerals
Part, 8 parts by weight of 60 parts by weight of aluminum oxide clinker, 5 parts by weight of reinforcing agent and thickener；
Wherein, the raw material components of natural minerals by weight, including：35 parts by weight of dolomite, 8 parts by weight of quick lime,
15 parts by weight of 1 parts by weight of calcite, 12 parts by weight of basalt and medical stone；
The raw material components of reinforcing agent by weight, including：5 parts by weight of anhydrous sodium sulphate, 25 parts by weight of calcium chloride, potassium carbonate 5
14 parts by weight of parts by weight, 6 parts by weight of sodium thiosulfate and triethanolamine.
Concrete accelerator is prepared using preparation method provided by the invention by above-mentioned raw material：
By each raw material component accurate weighing in proportion, natural minerals and aluminum oxide clinker are transported to roller through transport system later
In press, and processing is crushed under the pressure roller effect mutually squeezed, the grain diameter of the mixture after crushing is no more than
0.01mm；
By after crushing mixture and other surplus stock components mix and be made spherical, then roasted；Wherein, it roasts
Burning specifically includes step：Spherical mixture is warming up to 200 DEG C with the heating rate of 1 DEG C/min, then keeps the temperature 2h, then with
The heating rate of 0.5 DEG C/min is warming up to 800 DEG C, keeps the temperature 10h, then be cooled to 25 DEG C with the rate of temperature fall of 0.2 DEG C/min；
Mixture after roasting is transported in ball mill, with the rotational speed of ball-mill ball milling 4h of 200r/min, obtains concrete
Accelerator.
Embodiment 3
The present embodiment provides a kind of concrete accelerator, raw material components by weight, including：30 weight of natural minerals
Part, 6 parts by weight of 45 parts by weight of aluminum oxide clinker, 10 parts by weight of reinforcing agent and thickener；
Wherein, the raw material components of natural minerals by weight, including：45 parts by weight of dolomite, 4 parts by weight of quick lime,
20 parts by weight of 3 parts by weight of calcite, 10 parts by weight of basalt and medical stone；
The raw material components of reinforcing agent by weight, including：10 parts by weight of anhydrous sodium sulphate, 20 parts by weight of calcium chloride, potassium carbonate 8
17 parts by weight of parts by weight, 2 parts by weight of sodium thiosulfate and triethanolamine.
Concrete accelerator is prepared using preparation method provided by the invention by above-mentioned raw material：
By each raw material component accurate weighing in proportion, natural minerals and aluminum oxide clinker are transported to roller through transport system later
In press, and processing is crushed under the pressure roller effect mutually squeezed, the grain diameter of the mixture after crushing is no more than
0.01mm；
By after crushing mixture and other surplus stock components mix and be made spherical, then roasted；Wherein, it roasts
Burning specifically includes step：Spherical mixture is warming up to 300 DEG C with the heating rate of 2 DEG C/min, then keeps the temperature 3h, then with
The heating rate of 0.8 DEG C/min is warming up to 860 DEG C, keeps the temperature 12h, then be cooled to 30 DEG C with the rate of temperature fall of 0.3 DEG C/min；
Mixture after roasting is transported in ball mill, with the rotational speed of ball-mill ball milling 5h of 300r/min, obtains concrete
Accelerator.
Comparative example 1
This comparative example provides a kind of concrete accelerator, raw material components by weight, including：25 weight of natural minerals
Part, 7 parts by weight of 50 parts by weight of aluminum oxide clinker, 8 parts by weight of reinforcing agent and thickener；
Wherein, the raw material components of natural minerals by weight, including：It is 6 parts by weight of quick lime, 2 parts by weight of calcite, profound
18 parts by weight of 11 parts by weight of military rock and medical stone；
The raw material components of reinforcing agent by weight, including：7 parts by weight of anhydrous sodium sulphate, 23 parts by weight of calcium chloride, potassium carbonate 6
16 parts by weight of parts by weight, 4 parts by weight of sodium thiosulfate and triethanolamine.
By above-mentioned raw material, concrete accelerator is prepared：
By each raw material component accurate weighing in proportion, natural minerals and aluminum oxide clinker are transported to roller through transport system later
In press, and processing is crushed under the pressure roller effect mutually squeezed, the grain diameter of the mixture after crushing is no more than
0.01mm；
By after crushing mixture and other surplus stock components mix and be made spherical, then roasted；Wherein, it roasts
Burning specifically includes step：Spherical mixture is warming up to 250 DEG C with the heating rate of 1.5 DEG C/min, then keeps the temperature 2.5h, then
830 DEG C are warming up to the heating rate of 0.6 DEG C/min, keeps the temperature 11h, then 25 DEG C are cooled to the rate of temperature fall of 0.25 DEG C/min；
Mixture after roasting is transported in ball mill, with the rotational speed of ball-mill ball milling 4.5h of 250r/min, obtains coagulation
Native accelerator.
Comparative example 2
This comparative example provides a kind of concrete accelerator, raw material components by weight, including：25 weight of natural minerals
Part, 7 parts by weight of 50 parts by weight of aluminum oxide clinker, 8 parts by weight of reinforcing agent and thickener；
Wherein, the raw material components of natural minerals by weight, including：40 parts by weight of dolomite, 6 parts by weight of quick lime,
18 parts by weight of 2 parts by weight of calcite, 11 parts by weight of basalt and medical stone；
The raw material components of reinforcing agent by weight, including：7 parts by weight of anhydrous sodium sulphate, 23 parts by weight of calcium chloride, potassium carbonate 6
4 parts by weight of parts by weight and sodium thiosulfate.
By above-mentioned raw material, concrete accelerator is prepared：
By each raw material component accurate weighing in proportion, natural minerals and aluminum oxide clinker are transported to roller through transport system later
In press, and processing is crushed under the pressure roller effect mutually squeezed, the grain diameter of the mixture after crushing is no more than
0.01mm；
By after crushing mixture and other surplus stock components mix and be made spherical, then roasted；Wherein, it roasts
Burning specifically includes step：Spherical mixture is warming up to 250 DEG C with the heating rate of 1.5 DEG C/min, then keeps the temperature 2.5h, then
830 DEG C are warming up to the heating rate of 0.6 DEG C/min, keeps the temperature 11h, then 25 DEG C are cooled to the rate of temperature fall of 0.25 DEG C/min；
Mixture after roasting is transported in ball mill, with the rotational speed of ball-mill ball milling 4.5h of 250r/min, obtains coagulation
Native accelerator.
When the concrete accelerator that the embodiment of the present invention 1 to embodiment 3 is prepared carries out net slurry presetting period, final set
Between, the measurement of mortar compression strength, and the concrete accelerator being prepared with comparative example 1 and comparative example 2 is as a contrast.
It is as shown in table 1 below to measure obtained result.
1 performance measurement result of table
It should be noted that the Grade A net slurry presetting period is not more than 3min；Final setting time is not more than 8min；Mortar 1d is anti-
Compressive Strength is more than 7.0；28d compressive strength rates are more than 75%.The certified products net slurry presetting period is not more than 5min；Final setting time is little
In 12min；Mortar 1d compression strength is more than 6.0MPa；28d compression strength is more than 70%.Present invention manufacture controlling value net slurry initial set
Time is not more than 3min；Final setting time is not more than 5min；Mortar 1d compression strength 8.0；28d compressive strength rates 80%.
It should be noted that unless otherwise indicated, technical term or scientific terminology used in this application should be this hair
The ordinary meaning that bright one of ordinary skill in the art are understood.Unless specifically stated otherwise, it otherwise illustrates in these embodiments
Component and opposite step, numerical expression and the numerical value of step are not limit the scope of the invention.It is illustrated and described herein
In all examples, unless otherwise prescribed, any occurrence should be construed as merely illustrative, not as limitation, because
This, other examples of exemplary embodiment can have different values.
In the description of the present invention, it is to be understood that, term " first ", " second " are used for description purposes only, and cannot
It is interpreted as indicating or implies relative importance or implicitly indicate the quantity of indicated technical characteristic.Define as a result, " the
One ", the feature of " second " can explicitly or implicitly include one or more this feature.In the description of the present invention,
The meaning of " plurality " is two or more, unless otherwise specifically defined.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, it will be understood by those of ordinary skill in the art that：Its according to
So can with technical scheme described in the above embodiments is modified, either to which part or all technical features into
Row equivalent replacement；And these modifications or replacements, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme should all cover in protection scope of the present invention.
Claims (8)
1. a kind of concrete accelerator, which is characterized in that raw material components by weight, including：
Natural minerals 20-30 parts by weight, aluminum oxide clinker 45-60 parts by weight, reinforcing agent 5-10 parts by weight and thickener 6-8 weight
Part.
2. concrete accelerator according to claim 1, which is characterized in that raw material components by weight, including：
25 parts by weight of natural minerals, 7 parts by weight of 52 parts by weight of aluminum oxide clinker, 8 parts by weight of reinforcing agent and thickener.
3. concrete accelerator according to claim 1, it is characterised in that：
The raw material components of the natural minerals by weight, including：Dolomite 35-45 parts by weight, quick lime 4-8 parts by weight,
Calcite 1-3 parts by weight, basalt 10-12 parts by weight and medical stone 15-20 parts by weight.
4. concrete accelerator according to claim 1, it is characterised in that：
The raw material components of the reinforcing agent by weight, including：Anhydrous sodium sulphate 5-10 parts by weight, calcium chloride 20-25 parts by weight, carbon
Sour potassium 5-8 parts by weight, sodium thiosulfate 2-6 parts by weight and triethanolamine 14-17 parts by weight.
5. the preparation method of claim 1-4 any one of them concrete accelerators, which is characterized in that including step：
By each raw material component accurate weighing in proportion, natural minerals and aluminum oxide clinker are transported to roll squeezer through transport system later
It is interior, and crush processing under the pressure roller effect mutually squeezed；
By after crushing mixture and other surplus stock components mix and be made spherical, then roasted；
Mixture after roasting is transported to ball milling in ball mill, obtains the concrete accelerator.
6. the preparation method of concrete accelerator according to claim 5, it is characterised in that：
The grain diameter of mixture after the crushing is no more than 0.01mm.
7. the preparation method of concrete accelerator according to claim 5, it is characterised in that：
The roasting specifically includes step：Spherical mixture is warming up to 200-300 DEG C with the heating rate of 1-2 DEG C/min,
Then 2-3h is kept the temperature, then 800-860 DEG C is warming up to the heating rate of 0.5-0.8 DEG C/min, keeps the temperature 10-12h, then with 0.2-
The rate of temperature fall of 0.3 DEG C/min is cooled to 20-30 DEG C.
8. the preparation method of concrete accelerator according to claim 5, it is characterised in that：
The rotating speed of the ball milling is 200-300r/min, and the time of the ball milling is 4-5h.
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| CN109553324A (en) * | 2018-12-27 | 2019-04-02 | 广州华隆建筑材料有限公司 | A kind of strong concrete accelerator and preparation method thereof |
| CN111704379A (en) * | 2020-07-07 | 2020-09-25 | 四川省绿辉环保科技有限公司 | Concrete accelerator and preparation method thereof |
| US11565978B2 (en) * | 2018-01-24 | 2023-01-31 | Sika Technology Ag | Accelerator powder and quick-setting binder composition |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US11565978B2 (en) * | 2018-01-24 | 2023-01-31 | Sika Technology Ag | Accelerator powder and quick-setting binder composition |
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| CN111704379A (en) * | 2020-07-07 | 2020-09-25 | 四川省绿辉环保科技有限公司 | Concrete accelerator and preparation method thereof |
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Application publication date: 20181113 |