CN106630717A - Long-acting swelling agent for cement concrete and preparation method of long-acting swelling agent - Google Patents
Long-acting swelling agent for cement concrete and preparation method of long-acting swelling agent Download PDFInfo
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- CN106630717A CN106630717A CN201710004607.0A CN201710004607A CN106630717A CN 106630717 A CN106630717 A CN 106630717A CN 201710004607 A CN201710004607 A CN 201710004607A CN 106630717 A CN106630717 A CN 106630717A
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- grog
- swelling agent
- gypsum
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- cement concrete
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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
- C04B40/0042—Powdery mixtures
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a long-acting swelling agent for cement concrete and a preparation method of the long-acting swelling agent. The long-acting swelling agent for cement concrete consists of the following raw materials in parts by weight: 78-91 parts of clinker, 5-16 parts of gypsum and 1-12 parts of kieselguhr. The clinker is prepared from the following raw materials in parts by weight: 25-46 parts of bauxite, 40-60 parts of limestone and 8-17 parts of flue gas desulfurization gypsum. The preparation method comprises the following steps: (1) preparing the clinker; and (2) mixing and grinding the clinker, the gypsum and the kieselguhr. Inferior raw materials such as low-grade bauxite and high-magnesium limestone are fully used, the swelling agent has 3-5 swelling sources, the preparation method is simple and practicable, long-term swelling performance is good, restrained swelling rate (in water) within 7 days is between 0.030% and 0.047%, the restrained swelling rate (in water) within 28 days is between 0.065% and 0.098%, and the restrained swelling rate (in water) within 180 days is between 0.095% and 0.125%.
Description
Technical field
The invention belongs to building material field, more particularly to a kind of cement concrete long-acting swelling agent and its preparation side
Method.
Background technology
Cement concrete is China's range of application most one of maximum construction material of wide, application amount, in China's infrastructure
Construction field occupies very important status.The stability and volume stability of cement concrete is China's infrastructure construction
If the important leverage with safety applications.But the chemical constituent due to cement concrete and take to obtain preferable workability
The larger ratio of mud, cause cement concrete to condense in initial stage and hardening process and volume contraction phenomenon occur.Cement concrete
Contraction be divided into plastic shrinkage, chemical shrinkage is dried and shrinks and Carbonization contract.Volume contraction can cause cement concrete performance bad
Change, serious can also cause cracking.Scientific research and engineering practice show that swelling agent can effectively compensate cement concrete
Volume contraction, improves its stability and volume stability.
At present, China's cement concrete swelling agent can be divided three classes：Calcium oxide, calcium sulphoaluminate class and calcium oxide-sulphur
Calcium aluminate class.But existing swelling agent exist material quality is had high demands, expansion sources are single, expansion character cannot be adjusted and
The problem of longterm expansion poor performance.Therefore, the popularization and application of cement concrete swelling agent are seriously restricted.
The content of the invention
In order to solve the problems, such as above-mentioned swelling agent, the invention provides a kind of cement concrete with long-acting swelling agent and
Its preparation method.The swelling agent makes full use of the inferior raw material such as low-grade bauxite and dolomitic lime stone, with 3 ~ 5 expansions
Source, preparation method is simple, longterm expansion better performances, its 7 days limited expansion rates（In water）Between 0.030 ~ 0.047%, 28
Its limited expansion rate（In water）Between 0.065 ~ 0.098%, 180 days limited expansion rates（In water）Between 0.095 ~ 0.125%.
Technical scheme is as follows：
The long-acting swelling agent of a kind of cement concrete, it is characterised in that it is made up of the raw material of following weight portion：Grog 78 ~
91st, gypsum 5 ~ 16, diatomite 1 ~ 12.
The long-acting method for preparing expansion agent of a kind of cement concrete, it is characterised in that it is to comprise the steps of：1. it is ripe
It is prepared by material；2. grog, gypsum and diatomaceous combined grinding.
Described grog is obtained by the raw material of following weight portion：Bauxite 25 ~ 46, lime stone 40 ~ 60, gypsum 8 ~
17。
Described gypsum be desulfurated plaster, SO in its chemical composition3Content is between 43 ~ 55%.
Described diatomite be natural diatomaceous earth, SiO in its chemical composition2Content is between 74 ~ 85%.
Described bauxite be low-grade bauxite, Al in its chemical composition2O3Content is between 36 ~ 45%.
Described lime stone is dolomitic lime stone, and content of MgO is between 2.6 ~ 7% in its chemical composition.
1. prepared by grog for described step, and specifically, (1) the reasonable dosed powder of bauxite, lime stone, desulfurated plaster is to one
Determine fineness（170 mesh screen residues are between 1 ~ 7%）；(2), through material (1), 18 ~ 35min, Ran Hou are processed under the conditions of 100 ~ 110 DEG C
40 ~ 65min is processed under the conditions of 750 ~ 900 DEG C, 35 ~ 55min is processed under the conditions of 1180 ~ 1245 DEG C afterwards, you can be met
The grog of requirement.
Described step 2. grog, gypsum and diatomaceous combined grinding, specifically, grog and stone that 1. step is prepared
Cream, diatomite enter according to a certain ratio ball mill grinding to certain fineness（200 mesh screen residues are between 0.5 ~ 1.5%）, you can it is met
The swelling agent of requirement.
The cement concrete swelling agent is ground as raw material mixed powder with grog, desulfurated plaster and natural diatomaceous earth.
Its grog is, with low-grade bauxite, dolomitic lime stone and desulfurated plaster as raw material, to be obtained with reference to certain calcinating system.Low product
Position bauxite is the discarded object produced after industrial aluminium metallurgy industry flotation high-quality bauxite, and value is relatively low, the low product of current China
Position bauxite annual production is more than 50,000,000 tons；China's dolomitic lime stone aboundresources, but utilization rate is relatively low；Desulfurated plaster is
Industry byproduct, annual production is huge；China's natural diatomaceous earth rich reserves, easily exploit.Also, low-grade bauxite contain compared with
Abundant aluminum oxide, dolomitic lime stone contains abundant calcium oxide and a certain amount of magnesia, and desulfurated plaster main component is sulphur
Sour calcium, therefore low-grade bauxite, dolomitic lime stone and desulfurated plaster can be generated with calcium sulphoaluminate under uniform temperature system
For essential mineral and grog containing a certain amount of slight dead roasting calcium oxide and magnesia.Calcium sulphoaluminate, desulfurated plaster and water can be sent out
Raw hydration reaction generates entringite, produces volumetric expansion.Natural diatomaceous earth is loose porous material, and after its water suction body will be produced
Product expansion.
The present invention's has the prominent advantages that：
（1）The present invention makes full use of low-grade bauxite and dolomitic lime stone, realizes the effectively utilizes of inferior raw material；
（2）The swelling agent of the present invention contains 3 ~ 5 expansion sources, and expansion character can easily be accommodated；
（3）The swelling agent longterm expansion of the present invention is functional, can ensure the initial value stability of concrete；
（4）Preparation method is simple, with low cost.
Specific embodiment
With reference to specific embodiment, the present invention is described in further detail.
Embodiment 1
A kind of cement concrete long-acting swelling agent and preparation method thereof, each component parts by weight are as follows：
Grog 78
Desulfurated plaster 10
Natural diatomaceous earth 12
Above-mentioned grog is obtained by the raw material of following weight portion：
Low-grade bauxite 25
Dolomitic lime stone 60
Desulfurated plaster 15
SO in above-mentioned desulfurated plaster chemical composition3Content is 43%；SiO in natural diatomaceous earth chemical composition2Content is 85%；Low product
Al in the bauxite chemical composition of position2O3Content is 45%；Content of MgO is 2.6% in dolomitic lime stone chemical composition.
Specifically preparation process is：
1. prepared by grog, and specifically, (1) bauxite, lime stone, desulfurated plaster dosed powder by weight is to certain fineness
（170 mesh screen residues are 1%）；(2) through material (1), 35min is processed under the conditions of 100 DEG C, then processed under the conditions of 900 DEG C
40min, processes 35min, you can obtain grog under the conditions of 1245 DEG C afterwards；
2. grog, gypsum and diatomaceous combined grinding, specifically, grog and desulfurated plaster, natural diatom that 1. step is prepared
Native proportioning by weight enters ball mill grinding to certain fineness（200 mesh screen residues are 1.5%）, you can obtain swelling agent.
The swelling agent has 3 expansion sources, its 7d limited expansion rate（In water）For 0.030%, 28d limited expansion rates（In water）
For 0.065%, 180d limited expansion rates（In water）For 0.095%.
Embodiment 2
A kind of cement concrete long-acting swelling agent and preparation method thereof, each component parts by weight are as follows：
Grog 91
Desulfurated plaster 8
Natural diatomaceous earth 1
Above-mentioned grog is obtained by the raw material of following weight portion：
Low-grade bauxite 46
Dolomitic lime stone 40
Desulfurated plaster 14
SO in above-mentioned desulfurated plaster chemical composition3Content is 55%；SiO in natural diatomaceous earth chemical composition2Content is 74%；Low product
Al in the bauxite chemical composition of position2O3Content is 36%；Content of MgO is 7% in dolomitic lime stone chemical composition.
Specifically preparation process is：
1. prepared by grog, and specifically, (1) bauxite, lime stone, desulfurated plaster dosed powder by weight is to certain fineness
（170 mesh screen residues are 7%）；(2) through material (1), 18min is processed under the conditions of 110 DEG C, then processed under the conditions of 750 DEG C
40min, processes 55min, you can obtain grog under the conditions of 1180 DEG C afterwards；
2. grog, gypsum and diatomaceous combined grinding, specifically, grog and the natural gypsum, natural diatom that 1. step is prepared
Native proportioning by weight enters ball mill grinding to certain fineness（200 mesh screen residues are 0.5%）, you can obtain swelling agent.
The swelling agent has 5 expansion sources, its 7d limited expansion rate（In water）For 0.047%, 28d limited expansion rates（In water）
For 0.098%, 180d limited expansion rates（In water）For 0.125%.
Embodiment 3
A kind of cement concrete long-acting swelling agent and preparation method thereof, each component parts by weight are as follows：
Grog 85
Desulfurated plaster 10
Natural diatomaceous earth 5
Above-mentioned grog is obtained by the raw material of following weight portion：
Low-grade bauxite 38
Dolomitic lime stone 50
Desulfurated plaster 12
SO in above-mentioned desulfurated plaster chemical composition3Content is 50%；SiO in natural diatomaceous earth chemical composition2Content is 80%；Low product
Al in the bauxite chemical composition of position2O3Content is 40%；Content of MgO is 5.2% in dolomitic lime stone chemical composition.
Specifically preparation process is：
1. prepared by grog, and specifically, (1) bauxite, lime stone, desulfurated plaster dosed powder by weight is to certain fineness
（170 mesh screen residues are 3%）；(2) through material (1), 25min is processed under the conditions of 105 DEG C, then processed under the conditions of 810 DEG C
50min, processes 45min, you can obtain grog under the conditions of 1210 DEG C afterwards；
2. grog, gypsum and diatomaceous combined grinding, specifically, grog and the natural gypsum, natural diatom that 1. step is prepared
Native proportioning by weight enters ball mill grinding to certain fineness（200 mesh screen residues are 1.0%）, you can obtain swelling agent.
The swelling agent has 4 expansion sources, its 7d limited expansion rate（In water）For 0.040%, 28d limited expansion rates（In water）
For 0.087%, 180d limited expansion rates（In water）For 0.116%.
Claims (9)
1. the long-acting swelling agent of a kind of cement concrete, it is characterised in that it is made up of the raw material of following weight portion：Grog
78 ~ 91, gypsum 5 ~ 16, diatomite 1 ~ 12.
2. the long-acting method for preparing expansion agent of a kind of cement concrete, it is characterised in that it is to comprise the steps of：1. grog
Prepare；2. grog, gypsum and diatomaceous combined grinding.
3. swelling agent according to claim 1, it is characterised in that described grog is by the raw material system of following weight portion
：Bauxite 25 ~ 46, lime stone 40 ~ 60, gypsum 8 ~ 17.
4. swelling agent according to claim 1, it is characterised in that described gypsum is desulfurated plaster, in its chemical composition
SO3Content is between 43 ~ 55%.
5. swelling agent according to claim 1, it is characterised in that described diatomite is natural diatomaceous earth, its chemical group
Into middle SiO2Content is between 74 ~ 85%.
6. grog according to claim 3, it is characterised in that described bauxite is low-grade bauxite, its chemical group
Into middle Al2O3Content is between 36 ~ 45%.
7. grog according to claim 3, it is characterised in that described lime stone is dolomitic lime stone, its chemical composition
Middle content of MgO is between 2.6 ~ 7%.
8. preparation method according to claim 2, it is characterised in that 1. prepared by grog for described step, specifically, (1) aluminium
The reasonable dosed powder of alumina, lime stone, desulfurated plaster is to certain fineness（170 mesh screen residues are between 1 ~ 7%）；(2) through material (1),
18 ~ 35min is processed under the conditions of 100 ~ 110 DEG C, 40 ~ 65min is then processed under the conditions of 750 ~ 900 DEG C, afterwards 1180 ~
35 ~ 55min is processed under the conditions of 1245 DEG C, you can be met the grog of requirement.
9. preparation method according to claim 2, it is characterised in that described step 2. grog, gypsum and diatomaceous
Combined grinding, specifically, the grog and gypsum, diatomite that 1. step is prepared enters according to a certain ratio ball mill grinding to certain fineness
（200 mesh screen residues are between 0.5 ~ 1.5%）, you can it is met the swelling agent of requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710004607.0A CN106630717A (en) | 2017-01-04 | 2017-01-04 | Long-acting swelling agent for cement concrete and preparation method of long-acting swelling agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710004607.0A CN106630717A (en) | 2017-01-04 | 2017-01-04 | Long-acting swelling agent for cement concrete and preparation method of long-acting swelling agent |
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|---|---|
| CN106630717A true CN106630717A (en) | 2017-05-10 |
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|---|---|---|---|
| CN201710004607.0A Pending CN106630717A (en) | 2017-01-04 | 2017-01-04 | Long-acting swelling agent for cement concrete and preparation method of long-acting swelling agent |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107721229A (en) * | 2017-11-22 | 2018-02-23 | 广西云燕特种水泥建材有限公司 | A kind of grouting swelling agent and its production method |
| CN108439844A (en) * | 2018-05-17 | 2018-08-24 | 郑州市建文特材科技有限公司 | A kind of cement expansive material and preparation method thereof, concrete |
| CN112110707A (en) * | 2019-06-20 | 2020-12-22 | 武汉三源特种建材有限责任公司 | Hydration regulation and control type expansion clinker and preparation thereof |
| CN112854816A (en) * | 2021-03-22 | 2021-05-28 | 清大赛思迪新材料科技（北京）有限公司 | Concrete embedded member capable of being decomposed at regular time |
| CN113307517A (en) * | 2021-06-18 | 2021-08-27 | 登电集团水泥有限公司 | Quick-setting curing material and preparation method thereof |
| CN114014577A (en) * | 2021-09-26 | 2022-02-08 | 江西银杉白水泥股份有限公司 | Novel white concrete expanding agent and preparation method thereof |
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| CN1369455A (en) * | 2002-03-22 | 2002-09-18 | 陈智丰 | Efficient calcium thioaluminate type bulking agent and its preparing process |
| CN101508533A (en) * | 2009-03-27 | 2009-08-19 | 同济大学 | Method for producing cement expansive material by using flying ash, desulfurized gypsum from incineration of refuse |
| CN102219424A (en) * | 2011-04-02 | 2011-10-19 | 洛阳理工学院 | Method for preparing CSA (calcium sulfoaluminate) concrete expansion agent by utilizing petroleum coke desulfurization ash |
| CN102491669A (en) * | 2011-11-14 | 2012-06-13 | 南京瑞迪高新技术有限公司 | Special plastic expansion agent for cement-based grouting material and preparation method of same |
| CN104003639A (en) * | 2014-05-09 | 2014-08-27 | 中国铁道科学研究院铁道建筑研究所 | Overall-process anti-shrink agent for cement-based material and preparation method thereof |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1369455A (en) * | 2002-03-22 | 2002-09-18 | 陈智丰 | Efficient calcium thioaluminate type bulking agent and its preparing process |
| CN101508533A (en) * | 2009-03-27 | 2009-08-19 | 同济大学 | Method for producing cement expansive material by using flying ash, desulfurized gypsum from incineration of refuse |
| CN102219424A (en) * | 2011-04-02 | 2011-10-19 | 洛阳理工学院 | Method for preparing CSA (calcium sulfoaluminate) concrete expansion agent by utilizing petroleum coke desulfurization ash |
| CN102491669A (en) * | 2011-11-14 | 2012-06-13 | 南京瑞迪高新技术有限公司 | Special plastic expansion agent for cement-based grouting material and preparation method of same |
| CN104003639A (en) * | 2014-05-09 | 2014-08-27 | 中国铁道科学研究院铁道建筑研究所 | Overall-process anti-shrink agent for cement-based material and preparation method thereof |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107721229A (en) * | 2017-11-22 | 2018-02-23 | 广西云燕特种水泥建材有限公司 | A kind of grouting swelling agent and its production method |
| CN108439844A (en) * | 2018-05-17 | 2018-08-24 | 郑州市建文特材科技有限公司 | A kind of cement expansive material and preparation method thereof, concrete |
| CN108439844B (en) * | 2018-05-17 | 2020-11-17 | 郑州市建文特材科技有限公司 | Concrete expanding agent, preparation method thereof and concrete |
| CN112110707A (en) * | 2019-06-20 | 2020-12-22 | 武汉三源特种建材有限责任公司 | Hydration regulation and control type expansion clinker and preparation thereof |
| CN112854816A (en) * | 2021-03-22 | 2021-05-28 | 清大赛思迪新材料科技（北京）有限公司 | Concrete embedded member capable of being decomposed at regular time |
| CN112854816B (en) * | 2021-03-22 | 2022-08-30 | 清大赛思迪新材料科技（北京）有限公司 | Concrete embedded member capable of being decomposed at regular time |
| CN113307517A (en) * | 2021-06-18 | 2021-08-27 | 登电集团水泥有限公司 | Quick-setting curing material and preparation method thereof |
| CN114014577A (en) * | 2021-09-26 | 2022-02-08 | 江西银杉白水泥股份有限公司 | Novel white concrete expanding agent and preparation method thereof |
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Application publication date: 20170510 |