CN106316182A - Novel early strength agent for concrete and method for preparing novel early strength agent - Google Patents
Novel early strength agent for concrete and method for preparing novel early strength agent Download PDFInfo
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- CN106316182A CN106316182A CN201610696789.8A CN201610696789A CN106316182A CN 106316182 A CN106316182 A CN 106316182A CN 201610696789 A CN201610696789 A CN 201610696789A CN 106316182 A CN106316182 A CN 106316182A
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- early strength
- strength 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
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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
- C04B2103/10—Accelerators; Activators
- C04B2103/12—Set accelerators
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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 invention discloses a novel early strength agent for concrete and a method for preparing the novel early strength agent. The novel early strength agent comprises, by weight, 20-25 parts of CaO, 20-25 parts of Al2O3, 4-6 parts of Nb2O5, 3-7 parts of MgSO4, 15-20 parts of barite powder, 15-20 parts of zeolite powder, 0.3-0.7 part of Bi2O3, 1-3 parts of Li2CO3, 0.2-0.4 part of NaCl and 0.2-0.4 part of KCl. The method includes carrying out ball-milling on various components; calcining the various components at the temperatures of 850-900 DEG C; carrying out ball-milling on the various components and reagents such as calcium and aluminum hydrotalcite to obtain the novel early strength agent for the concrete. The novel early strength agent and the method have the advantages that excellent early strength effects can be realized by the novel early strength agent, the novel early strength agent is high in strength, has low calcination temperature and is a promising admixture for the concrete, and the like.
Description
Technical field
The present invention relates to a kind of new concrete early strength agent and preparation method thereof, belong to technical field of concrete additives.
Background technology
Along with economic fast development, concrete role in the middle of building also becomes more and more important, and this is the most right
Concrete proposes the highest requirement.In order to improve the performance of concrete and meet concrete construction needs, this area skill
Art personnel are utilized in concrete adding concrete admixture mode.Wherein, conventional concrete admixture has and subtracts
Water preparation, retarder, early strength agent, waterproofing agent etc..
Early strength agent is that one can accelerate hydrated cementitious speed, improves early age strength of concrete, and to later strength without aobvious
Write the additive of impact.According to chemical composition, it is broadly divided into mineral-type early strength agent and organic early strength agent.Inorganic salts is the strongest
Agent includes villaumite, sulfate, nitrite, silicate etc.；Organic early strength agent includes triethanolamine, calcium formate and carbamide
Deng.Inorganic salts early strength agent is that the scope of application is the widest and early potent fruit preferable concrete early strength agent type, but villaumite and sulfur
The inferior position of the early strength agent such as Barbiturates itself so that the application of such early strength agent exists limitation；Organic species early strength agent itself is not
Concrete can be caused damage, but the reaction more difficult assurance of consumption of organic species early strength agent, and price is higher, thus should in reality
Seldom it is used alone in.
In order to promote the development of early strength agent, those skilled in the art carry out deep exploration and research to early strength agent, and take
Obtaining Research Achievement necessarily, as entitled, " preparation method of a kind of low-density cement mortar early strength agent (announce by Chinese patent application
Number: CN104031624A) " patent disclose the preparation method of a kind of low-density cement mortar early strength agent, its described early strength agent
It is by following components by weight: CaO 35～55 parts, Al2O331～58 parts, SiO25～10 parts, Fe2O35～10 parts, and
Through ball milling, calcine at 1250-1400 DEG C, again with Li2CO3Ball milling, i.e. can get low-density cement mortar early strength agent.Although it can obtain
Obtain potent fruit morning necessarily, but in concrete application aspect, especially concrete strength aspect can't be satisfactory.This
Outward, its calcining heat 1250-1400 DEG C comparison is high, and this adds preparation cost virtually, constrains to a certain extent early
The development of strong agent.Therefore, continue to explore and be very important with research early strength agent.
Summary of the invention
For early strength agent in above-mentioned prior art to concrete strength aspect and the technical problem of calcining heat deficiency, this
Bright to be solved technical problem is that proposes a kind of new concrete morning that can be effectively improved intensity and reduce calcining heat
Strong agent and preparation method thereof.
A kind of new concrete early strength agent, is made up of each component of following weight: CaO 20～25 parts, Al2O3
20～25 parts, Nb2O54～6 parts, MgSO43～7 parts, blanc fixe 15～20 parts, zeolite powder 15～20 parts, Bi2O30.3～
0.7 part, Li2CO31～3 part, NaCl 0.2～0.4 part, KCl 0.2～0.4 part.
Preferably,
A kind of new concrete early strength agent, is made up of each component of following weight: CaO 22 parts, Al2O323 parts,
Nb2O55 parts, MgSO45 parts, blanc fixe 18 parts, zeolite powder 18 parts, Bi2O30.5 part, Li2CO32 parts, NaCl 0.3 part,
KCl 0.3 part.
The preparation method of described new concrete early strength agent, comprises the following steps:
1) by said components by weight for component: dehydrated alcohol: the material of zirconia ball=1:1:3 is placed in rotating speed and is
Ball milling on the ball mill of 200～300 turns/min, ball milling 6～8h；
2) sieve, dry, and with dry-pressing formed in stainless steel mould, the demoulding；And the sample after the demoulding is placed in 850～
900 DEG C of Muffle furnaces are calcined 0.5～1h, natural cooling；
3) it is ground into 60～120 mesh powder body, and is washed with deionized, until using AgNO3Till inspection produces without precipitation；
4) 4～8 parts of calcium aluminum hydrotalcites and 1～3 part of calcium sulphoaluminate, ball milling 30～40min it are sequentially added into；
5) 0.1～0.3 part of sugared calcium and 0.1～0.3 part of polycarboxylate water-reducer, ball milling 20～30min it are sequentially added into；
6) 1～3 part of calcium lignosulfonate and 0.3～0.7 part of nano-calcium carbonate are sequentially added, ball milling 20～30min, i.e.
Available new concrete early strength agent.
Described NaCl:KCl is 1:1.
Compared with prior art, the invention has the beneficial effects as follows:
First, preparation method is different.Prior art is to use solid phase method to prepare, and the present invention is to use molten-salt growth method to prepare.
Solid phase method calcining heat is high, and powder body is easily reunited, but molten-salt growth method is possible not only to make calcining heat reduce, the powder body of preparation
Uniformity is good, is favorably improved potent fruit morning of concrete., also it is designed in component meanwhile, makes the intensity of concrete carry
Height, the scope of application is wider；
Secondly, Li2CO3Function otherwise varied.It not only has potent fruit good morning, also has effect of cosolvent,
When calcining, it easily forms liquid phase, contributes to reducing calcining heat, reduces preparation cost；
Again, Nb2O5And Bi2O3Middle Nb5+、Bi3+Ion is high-valence cationic, and cohesion is strong, can be anti-with acceleration of hydration
Should, promote cement and the curing progress of concrete, improve early potent fruit；
Finally, calcium aluminum hydrotalcite and nano-calcium carbonate it are also added into.Calcium aluminum hydrotalcite can increase the compactness of concrete,
Improve impermeability, reduce laminated segregation and excreting water phenomenon, thus significantly improve early age strength of concrete；Nano-calcium carbonate has into
Nuclear effect, can promote cement hydration process as active centre, improves the strongest intensity of concrete, and nano-calcium carbonate also has simultaneously
There is filling effect, increase the compactness of concrete, improve early age strength of concrete.
Detailed description of the invention
The present invention provides a kind of new concrete early strength agent and preparation method thereof, to achieve the object of the present invention, technical side
Case and effect are clearer, clear and definite, and the present invention is described in more detail below.
A kind of new concrete early strength agent, is made up of each component of following weight: CaO 20～25 parts, Al2O3
20～25 parts, Nb2O54～6 parts, MgSO43～7 parts, blanc fixe 15～20 parts, zeolite powder 15～20 parts, Bi2O30.3～
0.7 part, Li2CO31～3 part, NaCl 0.2～0.4 part, KCl 0.2～0.4 part；
The preparation method of described new concrete early strength agent, comprises the following steps:
1) by said components by weight for component: dehydrated alcohol: the material of zirconia ball=1:1:3 is placed in rotating speed and is
Ball milling on the ball mill of 200～300 turns/min, ball milling 6～8h；
2) sieve, dry, and with dry-pressing formed in stainless steel mould, the demoulding；And the sample after the demoulding is placed in 850～
900 DEG C of Muffle furnaces are calcined 0.5～1h, natural cooling；
3) it is ground into 60～120 mesh powder body, and is washed with deionized, until using AgNO3Till inspection produces without precipitation；
4) 4～8 parts of calcium aluminum hydrotalcites and 1～3 part of calcium sulphoaluminate, ball milling 30～40min it are sequentially added into；
5) 0.1～0.3 part of sugared calcium and 0.1～0.3 part of polycarboxylate water-reducer, ball milling 20～30min it are sequentially added into；
6) 1～3 part of calcium lignosulfonate and 0.3～0.7 part of nano-calcium carbonate are sequentially added, ball milling 20～30min, i.e.
Available new concrete early strength agent；
Described NaCl:KCl is 1:1.
Detailed description of the invention
Embodiment 1
A kind of new concrete early strength agent, is made up of each component of following weight: CaO 22 parts, Al2O323 parts,
Nb2O55 parts, MgSO45 parts, blanc fixe 18 parts, zeolite powder 18 parts, Bi2O30.5 part, Li2CO32 parts, NaCl 0.3 part,
KCl 0.3 part.
Embodiment 2
A kind of new concrete early strength agent, is made up of each component of following weight: CaO 20 parts, Al2O320 parts,
Nb2O54 parts, MgSO43 parts, blanc fixe 15 parts, zeolite powder 15 parts, Bi2O30.3 part, Li2CO31 part, NaCl 0.2 part,
KCl 0.2 part.
Embodiment 3
A kind of new concrete early strength agent, is made up of each component of following weight: CaO 25 parts, Al2O325 parts,
Nb2O56 parts, MgSO47 parts, blanc fixe 20 parts, zeolite powder 20 parts, Bi2O30.7 part, Li2CO33 parts, NaCl 0.4 part,
KCl 0.4 part.
The new concrete early strength agent prepared by above-described embodiment 1-3 uses prior art to carry out performance test, test knot
The most as shown in table 1 below:
Table 1 early strength agent the performance test results
It can be seen that for the new concrete early strength agent prepared of different parameters is relative to background technology, there is low calcining
Temperature and the development of high comprcssive strength, beneficially early strength agent.
Certainly, it is that the preferred embodiments of the disclosure is described in detail above, not limits the present invention with this
Practical range, all principles under this invention, structure and structure made equivalence change, the protection of the present invention all should be covered by
In the range of.
Claims (3)
1. a new concrete early strength agent, it is characterised in that: it is made up of each component of following weight: CaO 20～25
Part, Al2O320～25 parts, Nb2O54～6 parts, MgSO43～7 parts, blanc fixe 15～20 parts, zeolite powder 15～20 parts,
Bi2O30.3～0.7 part, Li2CO31～3 part, NaCl 0.2～0.4 part, KCl 0.2～0.4 part；
Described NaCl:KCl is 1:1.
New concrete early strength agent the most according to claim 1, it is characterised in that: by each component of following weight
Make: CaO 22 parts, Al2O323 parts, Nb2O55 parts, MgSO45 parts, blanc fixe 18 parts, zeolite powder 18 parts, Bi2O3 0.5
Part, Li2CO32 parts, NaCl 0.3 part, KCl 0.3 part.
The preparation method of new concrete early strength agent the most according to claim 1, it is characterised in that: comprise the following steps:
1) by said components by weight for component: dehydrated alcohol: the material of zirconia ball=1:1:3 be placed in rotating speed be 200～
Ball milling on the ball mill of 300 turns/min, ball milling 6～8h；
2) sieve, dry, and with dry-pressing formed in stainless steel mould, the demoulding；And the sample after the demoulding is placed in 850～900 DEG C
Muffle furnace is calcined 0.5～1h, natural cooling；
3) it is ground into 60～120 mesh powder body, and is washed with deionized, until using AgNO3Till inspection produces without precipitation；
4) 4～8 parts of calcium aluminum hydrotalcites and 1～3 part of calcium sulphoaluminate, ball milling 30～40min it are sequentially added into；
5) 0.1～0.3 part of sugared calcium and 0.1～0.3 part of polycarboxylate water-reducer, ball milling 20～30min it are sequentially added into；
6) 1～3 part of calcium lignosulfonate and 0.3～0.7 part of nano-calcium carbonate are sequentially added, ball milling 20～30min,
To new concrete early strength agent.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610696789.8A CN106316182B (en) | 2016-08-19 | 2016-08-19 | Concrete early strength agent and preparation method thereof |
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| CN201610696789.8A CN106316182B (en) | 2016-08-19 | 2016-08-19 | Concrete early strength agent and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108947351A (en) * | 2018-08-08 | 2018-12-07 | 安徽理工大学 | Early-strength mineral seal material |
| CN109503112A (en) * | 2018-12-17 | 2019-03-22 | 濡ョ兢 | A kind of road and bridge concrete special and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108947351A (en) * | 2018-08-08 | 2018-12-07 | 安徽理工大学 | Early-strength mineral seal material |
| CN109503112A (en) * | 2018-12-17 | 2019-03-22 | 濡ョ兢 | A kind of road and bridge concrete special and preparation method thereof |
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| Publication number | Publication date |
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| CN106316182B (en) | 2018-09-28 |
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