CN107857493A - A kind of method that sulphate aluminium cement is modified - Google Patents
A kind of method that sulphate aluminium cement is modified Download PDFInfo
- Publication number
- CN107857493A CN107857493A CN201711222374.8A CN201711222374A CN107857493A CN 107857493 A CN107857493 A CN 107857493A CN 201711222374 A CN201711222374 A CN 201711222374A CN 107857493 A CN107857493 A CN 107857493A
- Authority
- CN
- China
- Prior art keywords
- cement
- sulphate aluminium
- modified
- sulphur
- aluminium cement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/32—Aluminous cements
-
- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/14—Acids or salts thereof containing sulfur in the anion, e.g. sulfides
Abstract
The invention discloses a kind of method that sulphate aluminium cement is modified, middle mineral-sulphur the calcium silicates formed during tradition is fired into sulphoaluminate cement clinker in this method is as modifying agent, using sulphoaluminate cement clinker as base-material, and it is equipped with gypsum and is mixed and finely ground modified sulphate aluminium cement is made for conditioning agent.The present invention can effectively improve the problem of sulphate aluminium cement later strength retraction, improve later stage and the long-term mechanical property of sulphate aluminium cement, expand the application of sulphate aluminium cement；The preparation of sulphur calcium silicates mineral can dissolve the silicates waste residue of high calcium sulphate content simultaneously, have the advantages that it is energy-saving, reduce cost, be easy to implement.
Description
Technical field
The present invention relates to a kind of method that sulphate aluminium cement is modified, belong to modified cement technical field.
Background technology
Sulphate aluminium cement has the good characteristic such as early strong, resistant to corrosion, freeze proof, main application as a kind of special cement
In special engineerings such as winter construction, impervious leak stopping, Rapid-Repairs, unfortunately belite mineral aquation is lived in sulphate aluminium cement
Property it is low cause cement later strength increases slowly even retraction, it is necessary to be improved to its later stage performance.Generally, aluminium sulfate water
The quality of mud production requirement aluminum raw material is higher, not only production cost increase, and raw material are also extremely restricted.Mesh
Before, a kind of belite sulphate aluminium cement for improving belite content, reducing calcium sulphoaluminate content causes extensive concern, the cement
The demand of high-quality alumina is reduced, expands the source of aluminum raw material so that some industrial residues containing aluminium are applied,
But belite content is higher in belite sulphate aluminium cement, the later strength of cement is still relatively low.
For sulphate aluminium cement later strength it is relatively low the problem of, domestic and international scientific research personnel is in the activation side of belite mineral
Substantial amounts of research work has been carried out in face, and conventional activation method has quick cooling, mechanical activation and chemical doping, these methods one
Determine to improve the hydration activity of belite in degree, but many deficiencies be present, such as higher to process control needs, many problems
Laboratory research is also limited to, the key technology of belite mineral activation is also difficult to solve, therefore fails in sulphate aluminium cement
Large-scale production and application aspect make a breakthrough.
Sulphur calcium silicates (2C2SCS, it is abbreviated as C5S2S) it is the midseam that is formed in sulphoaluminate cement clinker calcination process
Thing, its formation is relevant with the aluminium-sulfur ratio of composition, and when clinker burning temperature is relatively low, finally burns till in product and just have
Sulphur calcium silicates is present.Generally, sulphur calcium silicates is considered as a kind of inert mineral, can all be kept away in the production of traditional sulphate aluminium cement
Exempt from its formation, therefore, sulphate aluminium cement prepared by existing calcine technology typically will be free from sulphur calcium silicates mineral.But applicant
Current research finds that in sulphate aluminium cement system, the hydration activity of sulphur calcium silicates can be able to excite and be significantly higher than
Belite activity, this characteristic are advantageous to the growth of sulphate aluminium cement later strength, solve current sulphate aluminium cement intensity
The problem of retraction.Therefore, applicant thinks that sulphur calcium silicates can be as the additional modifying agent of sulphate aluminium cement.
The content of the invention
The purpose of the present invention is the performance issue for existing sulphate aluminium cement, improves a kind of sulphate aluminium cement and is modified
Method, it is mainly modified using sulphur calcium silicates Mineral pairs sulphate aluminium cement, to improve the later stage of sulphate aluminium cement
Intensity, improve later strength retraction, be advantageous to popularization and application of the sulphate aluminium cement in engineering technology.
The object of the present invention is achieved like this, a kind of method that sulphate aluminium cement is modified, it is characterised in that with sulphur aluminium
Acid salt cement clinker is base-material, to fire the sulphur calcium silicates mineral formed during sulphoaluminate cement clinker as modifying agent, is added
Enter gypsum and be mixed and finely ground modified sulphate aluminium cement is made；Wherein, the quality percentage of modified sulphate aluminium cement each component
Than as follows：Sulphoaluminate cement clinker 70~90%, modifying agent 5~15%；Gypsum 5~15%.
Described sulphur calcium silicates mineral by including lime stone, silicon ash, dihydrate gypsum raw material in 1100~1200 DEG C of conditions
Lower high-temperature calcination, insulation are prepared for 12 hours.
The mass content of sulphur calcium silicates is more than 70% in the modifying agent.
The gypsum uses dihydrate gypsum or natural anhydrite.
After sulphoaluminate cement clinker, modifying agent and gypsum are well mixed, through ball mill grinding to specific surface area be 300~
400m2/ Kg, modified sulphate aluminium cement is made.
The advanced science of the inventive method, by the present invention, a kind of method of sulphate aluminium cement modification, it is with sulphur aluminic acid
Salt cement clinker is base-material, to fire the sulphur calcium silicates intergradient mineral formed during sulphoaluminate cement clinker as modifying agent,
Addition proper amount of gypsum, which is mixed and finely ground, to be made, and the mass percent of modified cement each component is as follows：Sulphoaluminate cement clinker 70~
90%th, sulphur calcium silicates 5~15%, gypsum 5~15%.
Applicant analyzes the reason for traditional sulphate aluminium cement later strength is relatively low, in the Baily in sulphate aluminium cement
Special mineral hydration activity is low, and aquation is slow, and it is smaller to increase contribution to later strength.The side that the sulphate aluminium cement of the present invention is modified
In method, sulphur calcium silicates mineral can solve this problem as modifying agent.Sulphur calcium silicates is calcined as sulphoaluminate cement clinker
During a kind of intergradient mineral for being formed, be considered as a kind of inert mineral in the past, in the production of traditional sulphate aluminium cement all
Its formation can be avoided, therefore, sulphate aluminium cement prepared by existing calcine technology typically will be free from sulphur calcium silicates mineral.But Shen
Ask someone current research discovery, in sulphate aluminium cement system, the hydration activity of sulphur calcium silicates can be able to excite and significantly
Higher than belite activity, this characteristic is advantageous to the growth of sulphate aluminium cement later strength, solves current sulphate aluminium cement
The problem of strength retraction.Therefore, applicant thinks that sulphur calcium silicates can be as the additional modified component of sulphate aluminium cement, and this is right
There is prominent substantive contribution function in prior art.
In above-mentioned technical proposal, sulphur calcium silicates mineral are calcined by the raw material including lime stone, silicon ash and dihydrate gypsum and obtained.
Wherein, as high-temperature calcination under the conditions of preferably 1100~1200 DEG C of calcination parameter and be incubated 12 hours, be so more favorable for sulphur
The formation of calcium silicates mineral, improve purity.
As the optimization of technical scheme, the mass content of sulphur calcium silicates is more than 70% in the mixed mineral of preparation, so may be used
Using ensure its as sulphate aluminium cement additional modifying agent when sulphur calcium silicates be main modified component, and ensure modification
Effect.
Preferably selection is in obtained mixed mineral, and the mass content scope of sulphur calcium silicates mineral is 70%~90%,
Residual components are belite mineral.
As the optimization of such scheme, the gypsum can use dihydrate gypsum or anhydrite.So cost is cheap and sharp
In implementation.
As the optimization of such scheme, sulphoaluminate cement clinker, sulphur calcium silicates and gypsum are mixed in proportion simultaneously
Grinding to specific surface area is 300~400m2/Kg。
The content of sulphur calcium silicates mineral is 5~15% in modification sulphate aluminium cement prepared by above-mentioned technical proposal.
To sum up, tradition is fired the middle mineral-sulphur calcium silicates formed during sulphoaluminate cement clinker and made by this method
For modifying agent, using sulphoaluminate cement clinker as base-material, and it is equipped with gypsum and is mixed and finely ground for conditioning agent and modified sulphur aluminic acid is made
Salt cement.
The present invention can effectively improve the problem of sulphate aluminium cement later strength retraction, improve sulphate aluminium cement
Later stage and long-term mechanical property, expand the application of sulphate aluminium cement；The preparation of sulphur calcium silicates mineral can dissolve simultaneously
The silicates waste residue of high calcium sulphate content, have the advantages that it is energy-saving, reduce cost, be easy to implement.
The invention has the advantages that：
1st, using the mineral modified sulphate aluminium cement of sulphur calcium silicates, the later stage that can significantly improve sulphate aluminium cement is strong
Degree, solves the problems, such as its later stage strength retraction.
2nd, sulphur calcium silicates mineral are prepared simple, and grindability is good, are adapted to industrialized production, as cement additire embodiment party
Just.
3rd, preparing for sulphur calcium silicates mineral can be using the silicates waste residue of high calcium sulphate content, energy-saving, cost
It is cheap, be advantageous to environmental protection.
4th, modified sulphate aluminium cement is applied widely.
Embodiment
With reference to embodiment, the present invention is described in further detail.
A kind of method that sulphate aluminium cement is modified, using sulphoaluminate cement clinker as base-material, to fire aluminium sulfate water
The sulphur calcium silicates mineral formed during mud clinker are modifying agent, and addition gypsum, which is mixed and finely ground, is made modified aluminium sulfate water
Mud；Wherein, the mass percent of modified sulphate aluminium cement each component is as follows：Sulphoaluminate cement clinker 70~90%, change
Property agent 5~15%；Gypsum 5~15%.Wherein, preferably, described sulphur calcium silicates mineral are by including lime stone, silicon ash, two
The raw material of water gypsum high-temperature calcination, insulation under the conditions of 1100~1200 DEG C are prepared for 12 hours.Sulphur calcium silicates in modifying agent
Mass content be more than 70%.Gypsum uses dihydrate gypsum or natural anhydrite.Sulphoaluminate cement clinker, modifying agent and gypsum
It is 300~400m through ball mill grinding to specific surface area after well mixed2/ Kg, modified sulphate aluminium cement is made.
With reference to above ratio, when making, carry out embodying production such as embodiment 1,2,3.In embodiment 1,2,3,
Using sulphur calcium silicates mineral as modifying agent, gypsum uses dihydrate gypsum.
Embodiment 1：
A kind of method of modifying of sulphate aluminium cement, specific implementation step are as follows：By sulphoaluminate cement clinker, sulphur silicic acid
Calcium, dihydrate gypsum are according to following quality proportioning dispensing：78 parts of sulphoaluminate cement clinker, 7 parts of sulphur calcium silicates, dihydrate gypsum 15
Part, intergrinding to specific surface area is 330m after being well mixed2/ Kg, is made finished cement.By modified sulphate aluminium cement
Standard specimen is prepared into, according to national standard GB/T17671-1999《Cement strength testing method》Glue sand test piece intensity is surveyed
Examination, 90 days compression strength is 60.2MPa after measured.
Embodiment 2：
A kind of method of modifying of sulphate aluminium cement, specific implementation step are as follows：By sulphoaluminate cement clinker, sulphur silicic acid
Calcium, anhydrite are according to following quality proportioning dispensing：80 parts of sulphoaluminate cement clinker, 10 parts of sulphur calcium silicates, 10 parts of dihydrate gypsum,
Intergrinding to specific surface area is 350m after well mixed2/ Kg, is made finished cement.By modified sulphate aluminium cement system
It is standby into standard specimen, according to national standard GB/T17671-1999《Cement strength testing method》Glue sand test piece intensity is tested,
90 days compression strength is 64.5MPa after measured.
Embodiment 3：
A kind of method of modifying of sulphate aluminium cement, specific implementation step are as follows：By sulphoaluminate cement clinker, sulphur silicic acid
Calcium, anhydrite are according to following quality proportioning dispensing：88 parts of sulphoaluminate cement clinker, 15 parts of sulphur calcium silicates, 7 parts of dihydrate gypsum,
Intergrinding to specific surface area is 360m after well mixed2/ Kg, is made finished cement.By modified sulphate aluminium cement system
It is standby into standard specimen, according to national standard GB/T17671-1999《Cement strength testing method》Glue sand test piece intensity is tested,
90 days compression strength is 67.6MPa after measured.
In order to further verify modified effect of the sulphur calcium silicates to sulphate aluminium cement, applicant is by above-described embodiment 1, real
Apply the cement mortar strength and contrast groups (the fast hard sulphur aluminic acid that identical sulphoaluminate cement clinker is prepared under 3 each age of example 2 and embodiment
Salt cement) intensity contrasted, as shown in table 1.
Table 1
From table 1 it follows that the modified sulphate aluminium cement intensity of sulphur calcium silicates is significantly higher than common aluminium sulfate
Later stage (after 56 days) gain in strength of the intensity of cement, especially cement is accelerated.Therefore, the present invention utilizes sulphur calcium silicates mineral
Sulphate aluminium cement is modified, can not only solve the problems, such as sulphate aluminium cement later strength retraction, moreover it is possible to expand sulphur
The application of aluminate cement.
Claims (5)
1. a kind of method that sulphate aluminium cement is modified, it is characterised in that using sulphoaluminate cement clinker as base-material, to fire sulphur
The sulphur calcium silicates mineral formed during aluminate cement clinker are modifying agent, and addition gypsum, which is mixed and finely ground, is made modified sulphur aluminium
Acid salt cement；Wherein, the mass percent of modified sulphate aluminium cement each component is as follows：Sulphoaluminate cement clinker 70 ~
90%th, modifying agent 5 ~ 15%；Gypsum 5 ~ 15%.
2. the method that a kind of sulphate aluminium cement according to claim 1 is modified, it is characterised in that described sulphur calcium silicates
Mineral by including lime stone, silicon ash, dihydrate gypsum raw material under the conditions of 1100 ~ 1200 DEG C high-temperature calcination, insulation 12 hours make
It is standby and obtain.
3. the method that a kind of sulphate aluminium cement according to claim 1 is modified, it is characterised in that sulphur in the modifying agent
The mass content of calcium silicates is more than 70%.
4. the method that a kind of sulphate aluminium cement according to claim 1 is modified, it is characterised in that the gypsum uses two
Water gypsum or natural anhydrite.
5. the method that a kind of sulphate aluminium cement according to claim 1 is modified, it is characterised in that sulphate aluminium cement is ripe
It is 300 ~ 400m through ball mill grinding to specific surface area after material, modifying agent and gypsum are well mixed2/ Kg, modified sulphur aluminium is made
Acid salt cement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711222374.8A CN107857493A (en) | 2017-11-29 | 2017-11-29 | A kind of method that sulphate aluminium cement is modified |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711222374.8A CN107857493A (en) | 2017-11-29 | 2017-11-29 | A kind of method that sulphate aluminium cement is modified |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107857493A true CN107857493A (en) | 2018-03-30 |
Family
ID=61704237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711222374.8A Pending CN107857493A (en) | 2017-11-29 | 2017-11-29 | A kind of method that sulphate aluminium cement is modified |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107857493A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108545972A (en) * | 2018-07-18 | 2018-09-18 | 扬州大学 | A kind of high-strength sulphate aluminium cement and preparation method thereof |
| CN108558247A (en) * | 2018-04-27 | 2018-09-21 | 济南大学 | A kind of aluminium sulfate autofluorescence gelling mineral and preparation method thereof |
| CN108863120A (en) * | 2018-07-18 | 2018-11-23 | 扬州大学 | A kind of high-strength sulphoaluminate cement base material and preparation method thereof |
| CN110078393A (en) * | 2019-05-15 | 2019-08-02 | 盐城工学院 | A kind of method of low temperature preparation sulphur calcium silicates-sulphate aluminium cement |
| CN110498631A (en) * | 2019-08-30 | 2019-11-26 | 北京工业大学 | A method of improving sulphate aluminium cement stable long-term strength |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104609750A (en) * | 2015-02-09 | 2015-05-13 | 重庆大学 | Sulphoaluminate cement and preparation method thereof |
| CN104609434A (en) * | 2015-02-09 | 2015-05-13 | 重庆大学 | Preparation method and application method of calcium sulphosilicate mineral |
| CN107021654A (en) * | 2017-05-31 | 2017-08-08 | 重庆大学 | A kind of sulphur calcium silicates sulphate aluminium cement and preparation method thereof |
-
2017
- 2017-11-29 CN CN201711222374.8A patent/CN107857493A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104609750A (en) * | 2015-02-09 | 2015-05-13 | 重庆大学 | Sulphoaluminate cement and preparation method thereof |
| CN104609434A (en) * | 2015-02-09 | 2015-05-13 | 重庆大学 | Preparation method and application method of calcium sulphosilicate mineral |
| CN107021654A (en) * | 2017-05-31 | 2017-08-08 | 重庆大学 | A kind of sulphur calcium silicates sulphate aluminium cement and preparation method thereof |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108558247A (en) * | 2018-04-27 | 2018-09-21 | 济南大学 | A kind of aluminium sulfate autofluorescence gelling mineral and preparation method thereof |
| CN108558247B (en) * | 2018-04-27 | 2020-12-25 | 济南大学 | Sulphoaluminate autofluorescence gel mineral and preparation method thereof |
| CN108545972A (en) * | 2018-07-18 | 2018-09-18 | 扬州大学 | A kind of high-strength sulphate aluminium cement and preparation method thereof |
| CN108863120A (en) * | 2018-07-18 | 2018-11-23 | 扬州大学 | A kind of high-strength sulphoaluminate cement base material and preparation method thereof |
| CN110078393A (en) * | 2019-05-15 | 2019-08-02 | 盐城工学院 | A kind of method of low temperature preparation sulphur calcium silicates-sulphate aluminium cement |
| CN110078393B (en) * | 2019-05-15 | 2022-01-11 | 盐城工学院 | Method for preparing calcium sulfosilicate-sulphoaluminate cement at low temperature |
| CN110498631A (en) * | 2019-08-30 | 2019-11-26 | 北京工业大学 | A method of improving sulphate aluminium cement stable long-term strength |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107857493A (en) | A kind of method that sulphate aluminium cement is modified | |
| CN113416013B (en) | High-performance concrete crack resistance agent and preparation method thereof | |
| CN102898050B (en) | High-magnesium minimum-inflation low-heat cement and preparation method thereof | |
| CN102092976B (en) | Mass eco-concrete expansive agent and preparation method thereof | |
| CN106316172B (en) | Fine high intensity High-belite Cement and preparation method thereof | |
| KR101809485B1 (en) | Ultra rapid harding,high early strength waterproof and mothproof mortar composition | |
| CN103613293A (en) | Minimum inflation high magnesium moderate heat cement, production method therefor and applications thereof | |
| CN105347707A (en) | Anti-erosion low calcium portland cement and preparation method thereof | |
| CN108658485B (en) | Hydraulic cement clinker, preparation method thereof, hydraulic cement and application thereof | |
| CN105330180A (en) | Early-strength low-heat Portland cement and preparation method thereof | |
| CN103435279B (en) | Titanium slag doped supersulfated cement and preparation method thereof | |
| CN108545972A (en) | A kind of high-strength sulphate aluminium cement and preparation method thereof | |
| CN105347760A (en) | Slow-setting type waterproof mortar having self-repairing function and secondary permeability resistance as well as preparation method thereof | |
| CN112939561B (en) | Phosphogypsum-based light plastering gypsum and preparation method thereof | |
| CN107793052A (en) | A kind of Portland fly ash cement and preparation method thereof | |
| WO2019232687A1 (en) | Ultra-rapid-hardening special inorganic cement material and preparation method therefor | |
| Liu et al. | Investigation on strength and pore structure of supersulfated cement paste | |
| CN106277864B (en) | Extra large work low-heat portland cement clinker aggregate and preparation method thereof | |
| CN103058549B (en) | Retarder matched with magnesia expansive agent and preparation method thereof | |
| KR20070035377A (en) | Super high early strength blast furnace slag cement | |
| CN105481321A (en) | Modified gypsum base screed and preparation and application thereof | |
| CN110563355A (en) | Masonry cement for home decoration and production method thereof | |
| CN108793783B (en) | Shale gas horizontal well cementing cement and shale gas horizontal well cementing cement slurry | |
| CN108774016B (en) | Double-source expanding agent for concrete and preparation method thereof | |
| CN111689702B (en) | Early-strength sulfate-resistant cement |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180330 |