CN106938896A - A kind of cement expansive material and preparation method and application - Google Patents
A kind of cement expansive material and preparation method and application Download PDFInfo
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- CN106938896A CN106938896A CN201710194230.XA CN201710194230A CN106938896A CN 106938896 A CN106938896 A CN 106938896A CN 201710194230 A CN201710194230 A CN 201710194230A CN 106938896 A CN106938896 A CN 106938896A
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- gypsum
- clay
- cement expansive
- expansive material
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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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- 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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- 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
- C04B2103/60—Agents for protection against chemical, physical or biological attack
- C04B2103/65—Water proofers or repellants
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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 kind of cement expansive material and preparation method and application, it is related to technical field of concrete, it includes the raw material of following parts by weight：68 parts of clay, 15 20 parts of sulfur trioxide, 26 32 parts of volcanic ash, 22 30 parts of wollastonite in powder, 35 45 parts of gypsum.After testing, this product is better than like product to the adaptability of concrete strength and compensation contraction, and with preferable water proof anti-seepage effect.
Description
Technical field
The present invention relates to technical field of concrete, more particularly to a kind of cement expansive material and preparation method and application.
Background technology
Building produces crack mainly as caused by the drying shrinkage of concrete and temperature deformation, initial stage of the concrete in condensation
In hydration process, chemical reaction generation crystalline compounds can be all produced, because crystalline compounds are smaller than volume of raw material, so
Volume of concrete can be caused to shrink, when the tension for shrinking generation is more than the ultimate tension of concrete component, just produced
Concrete cracking.Therefore expansive concrete is to solve most effective, the most economical technological approaches of concrete cracking.Concrete is used
Swelling agent is the main additive for preparing expansive concrete, wide because swelling agent has excellent compensation shrinkage
It is used for self waterproofing, the jointless construction of super-long structural and the control of concrete cracks of underground concrete structure generally.It is mixed
Solidifying soil expansion agent is that microdilatancy is produced when concrete is started to shrink at or before starting to shrink at, and applying pressure to concrete component should
Power, to offset, slacken or balance due to tension caused by contraction, so as to reach that structurally internal stress is minimum, prevent crackle
There is, avoid the purpose of cracking.
In the market swelling agent mostly be with calcined kaolin, alunite, dickite, aluminium ore slag, calcium aluminate clinker or
, there is low expansion energy, expansion rate and concrete coagulation core water in the entringite class swelling agent that calcium sulphoaluminate clinker is prepared with gypsum
Change reaction rate, which is mismatched, volume is big, alkali content is high easily causes the unfavorable factors such as alkali-aggregate reaction；Using CaO as main component
Calcium oxide expansion agents, have that speed of expansion is too fast, Bulking Time is short, expansion with concrete shrinkage speed is uncoordinated, be difficult to protect
The shortcomings of depositing；Magnesia class swelling agent by main component of MgO, it is excessively slow to there is speed of expansion, and expansion start time far falls behind
In the concrete shrinkage time started, it is impossible to play the drawbacks such as cracking resistance effect.Existing swelling agent can not be met in construction to coagulation
The requirement of soil swelling energy, it is necessary to research and develop performance more preferably cement expansive material.
The content of the invention
In view of this, a kind of compensation contraction of present invention offer is good, can be adapted and have concurrently anti-with concrete strength
Cement expansive material of the impervious effect of water and preparation method and application.
In order to realize foregoing invention purpose, the present invention provides following technical scheme：
A kind of cement expansive material, it includes the raw material of following parts by weight：6-8 parts of clay, 15-20 parts of sulfur trioxide, fire
26-32 parts of mountain ash, 22-30 parts of wollastonite in powder, 35-45 parts of gypsum.
The present invention also has following additional technical feature：
It is preferred that, it includes the raw material of following parts by weight：7 parts of clay, 17 parts of sulfur trioxide, 30 parts of volcanic ash, wollastonite
26 parts of powder, 39 parts of gypsum.
It is preferred that, it includes the raw material of following parts by weight：6 parts of clay, 18 parts of sulfur trioxide, 29 parts of volcanic ash, wollastonite
29 parts of powder, 36 parts of gypsum.
It is preferred that, it includes the raw material of following parts by weight：7 parts of clay, 20 parts of sulfur trioxide, 26 parts of volcanic ash, wollastonite
22 parts of powder, 45 parts of gypsum.
It is preferred that, it includes the raw material of following parts by weight：8 parts of clay, 19 parts of sulfur trioxide, 32 parts of volcanic ash, wollastonite
24 parts of powder, 40 parts of gypsum.
It is preferred that, it includes the raw material of following parts by weight：7 parts of clay, 15 parts of sulfur trioxide, 31 parts of volcanic ash, wollastonite
26 parts of powder, 42 parts of gypsum.
It is preferred that, it includes the raw material of following parts by weight：8 parts of clay, 17 parts of sulfur trioxide, 28 parts of volcanic ash, wollastonite
25 parts of powder, 44 parts of gypsum.
It is preferred that, quality of alumina content is 22-27% in the clay, and calcium oxide content is 2.2-3.4%, magnesia
Content is 2.1-2.6%, and content of titanium dioxide is 0.9-1.5%, and iron oxide content is 2-3.5%.
The present invention also provides the application of above-mentioned cement expansive material, and the swelling agent is in concrete with the quality of cement
Meter adding proportion is 7-10%.
It is preferred that, the swelling agent counts adding proportion as 8% in concrete using the quality of cement, how many pairs of expansions of volume
Performance and pre-hardening final setting time influence are larger, and according to practice of construction situation, the optimal presetting period is 140min or so, it is thus determined that
Volume is 8%.
The present invention separately provides the preparation method of above-mentioned cement expansive material, by clay, sulfur trioxide, volcanic ash, silicon ash
After stone flour, gypsum mixing after calcination 30-60min under the conditions of temperature is 900-1300 DEG C, grinding to specific surface area is 200-600
㎡/kg is produced.
It is preferred that, the gypsum is gypsum.
It is preferred that, the temperature is 1100 DEG C.
It is preferred that, the time is 50min.
It is preferred that, the specific surface area is 400-600 ㎡/kg.
Compared to the prior art the present invention, the advantage is that：
Meeting after calcination under the conditions of 900-1300 DEG C after clay, sulfur trioxide, volcanic ash, wollastonite in powder, gypsum are mixed
Produce the more free silica with greater activity, calcium oxide, aluminum oxide, sulfur oxide and magnesia molecule etc., a variety of work
Property molecular association expansion be higher than single-activity molecule, after testing, this product is received to the adaptability of concrete strength and compensation
Contracting effect is better than like product, and with preferable water proof anti-seepage effect.
Embodiment
Following discloses some embodiments of the present invention, those skilled in the art can be suitably modified work according to present disclosure
Skill parameter is realized.In particular, all similar replacements and change be aobvious and easy for a person skilled in the art
See, they are considered as being included in the present invention.The method of the present invention and application are described by preferred embodiment,
Related personnel substantially can not departing from present invention, method described herein and application be modified in spirit and scope or
Suitably change with combining, to realize and apply the technology of the present invention.
Embodiment 1 prepares No. 1 swelling agent
By clay 70g, sulfur trioxide 170g, volcanic ash 300g, wollastonite in powder 260g, 1100 DEG C after gypsum 390g mixing
Under the conditions of after calcination 40min, grinding to specific surface area produces for 400-600 ㎡/kg.
Comparative example 1 is without sulfur trioxide, and other are same as Example 1.
Comparative example 2 is without clay, and other are same as Example 1.
Embodiment 2 prepares No. 2 swelling agents
By clay 60g, sulfur trioxide 180g, volcanic ash 290g, wollastonite in powder 290g, 900 DEG C after gypsum 360g mixing
Under the conditions of after calcination 60min, grinding to specific surface area produces for 200-600 ㎡/kg.
Embodiment 3 prepares No. 3 swelling agents
By clay 70g, sulfur trioxide 200g, volcanic ash 260g, wollastonite in powder 220g, 1300 DEG C after gypsum 450g mixing
Under the conditions of after calcination 50min, grinding to specific surface area produces for 200-600 ㎡/kg.
Embodiment 4 prepares No. 4 swelling agents
By clay 80g, sulfur trioxide 190g, volcanic ash 320g, wollastonite in powder 240g, 1000 DEG C after gypsum 400g mixing
Under the conditions of after calcination 40min, grinding to specific surface area produces for 200-600 ㎡/kg.
Embodiment 5 prepares No. 5 swelling agents
By clay 70g, sulfur trioxide 150g, volcanic ash 310g, wollastonite in powder 260g, 1100 DEG C after gypsum 420g mixing
Under the conditions of after calcination 50min, grinding to specific surface area produces for 200-600 ㎡/kg.
Embodiment 6 prepares No. 6 swelling agents
By clay 80g, sulfur trioxide 170g, volcanic ash 280g, wollastonite in powder 250g, 1200 DEG C after gypsum 440g mixing
Under the conditions of after calcination 50min, grinding to specific surface area produces for 200-600 ㎡/kg.
Cement expansive material made from 8 embodiments is by cement (32.5 grades of Portland cements) volume by more than
In 8% mass incorporation concrete, and the preferable calcium sulphoaluminate cement expansive material A of itself and commercially available sales volume is subjected to effect detection,
Testing result is shown in Table swelling agent testing result in 1, embodiments of the invention and meets GB23439-2009《Cement expansive material》、
《JC474-2008》Standard.
The each group swelling agent effect detection table of table 1
From water, dry empty expansion rate, and compression strength, permeated height ratio, water demand ratio testing result can be seen that, this hair
The effective expansion rate of bright swelling agent and water proof anti-seepage effect are substantially better than commercially available swelling agent A.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (5)
1. a kind of cement expansive material, it is characterised in that it includes the raw material of following parts by weight：6-8 parts of clay, sulfur trioxide
15-20 parts, 26-32 parts of volcanic ash, 22-30 parts of wollastonite in powder, 35-45 parts of gypsum.
2. cement expansive material according to claim 1, it is characterised in that quality of alumina content is in the clay
22-27%, calcium oxide content is 2.2-3.4%, and content of magnesia is 2.1-2.6%, and content of titanium dioxide is 0.9-1.5%, oxidation
Iron content is 2-3.5%.
3. the application of the cement expansive material described in claim 1 or 2, it is characterised in that the swelling agent in concrete with
Cementaceous gauge adding proportion is 7-10%.
4. the preparation method of the cement expansive material described in claim 1 or 2, it is characterised in that by clay, sulfur trioxide, fire
After mountain ash, wollastonite in powder, gypsum mixing after calcination 30-60min under the conditions of temperature is 900-1300 DEG C, grinding to specific surface area
Produced for 200-600 ㎡/kg.
5. the preparation method of cement expansive material according to claim 5, it is characterised in that the gypsum is gypsum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710194230.XA CN106938896B (en) | 2017-03-28 | 2017-03-28 | Concrete expanding agent and preparation method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710194230.XA CN106938896B (en) | 2017-03-28 | 2017-03-28 | Concrete expanding agent and preparation method and application thereof |
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| Publication Number | Publication Date |
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| CN106938896A true CN106938896A (en) | 2017-07-11 |
| CN106938896B CN106938896B (en) | 2020-05-15 |
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| CN201710194230.XA Active CN106938896B (en) | 2017-03-28 | 2017-03-28 | Concrete expanding agent and preparation method and application thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109133696A (en) * | 2018-09-17 | 2019-01-04 | 佛山朝鸿新材料科技有限公司 | A kind of preparation method of cement expansive material |
Citations (5)
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|---|---|---|---|---|
| CN102399067A (en) * | 2010-09-10 | 2012-04-04 | 重庆达华砼外加剂科技发展有限公司 | Concrete expansive agent |
| CN102745933A (en) * | 2012-07-23 | 2012-10-24 | 宁波新盛建材开发有限公司 | Anti-crack expanding agent and preparation method thereof |
| CN103496869A (en) * | 2013-09-26 | 2014-01-08 | 中铁十五局集团有限公司 | Expansive agent for preventing concrete from cracking |
| CN104386938A (en) * | 2014-10-30 | 2015-03-04 | 中冶天工集团有限公司 | Multifunctional expanding agent for seamless construction of super-long concrete structure |
| CN105130237A (en) * | 2015-07-08 | 2015-12-09 | 新疆中丹富兴新材料技术有限公司 | Cement base material expanding agent and preparation method thereof |
-
2017
- 2017-03-28 CN CN201710194230.XA patent/CN106938896B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102399067A (en) * | 2010-09-10 | 2012-04-04 | 重庆达华砼外加剂科技发展有限公司 | Concrete expansive agent |
| CN102745933A (en) * | 2012-07-23 | 2012-10-24 | 宁波新盛建材开发有限公司 | Anti-crack expanding agent and preparation method thereof |
| CN103496869A (en) * | 2013-09-26 | 2014-01-08 | 中铁十五局集团有限公司 | Expansive agent for preventing concrete from cracking |
| CN104386938A (en) * | 2014-10-30 | 2015-03-04 | 中冶天工集团有限公司 | Multifunctional expanding agent for seamless construction of super-long concrete structure |
| CN105130237A (en) * | 2015-07-08 | 2015-12-09 | 新疆中丹富兴新材料技术有限公司 | Cement base material expanding agent and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109133696A (en) * | 2018-09-17 | 2019-01-04 | 佛山朝鸿新材料科技有限公司 | A kind of preparation method of cement expansive material |
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| CN106938896B (en) | 2020-05-15 |
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