CN110498631A - A method of improving sulphate aluminium cement stable long-term strength - Google Patents
A method of improving sulphate aluminium cement stable long-term strength Download PDFInfo
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- CN110498631A CN110498631A CN201910815182.0A CN201910815182A CN110498631A CN 110498631 A CN110498631 A CN 110498631A CN 201910815182 A CN201910815182 A CN 201910815182A CN 110498631 A CN110498631 A CN 110498631A
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- Prior art keywords
- calcium silicates
- sulphate aluminium
- aluminium cement
- sulphur calcium
- cement
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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
- 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
-
- 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
-
- 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
- C04B7/323—Calcium aluminosulfate cements, e.g. cements hydrating into ettringite
Abstract
A method of improving sulphate aluminium cement stable long-term strength, belongs to building material technical field.Its method prepares sulphur calcium silicates mineral using raw material of industry calcining and is applied to improve stable long-term strength in sulphate aluminium cement as modifying agent.Lime stone, silicon ash and anhydrite are uniformly mixed according to 62:18:20, and calcines and keeps the temperature at high temperature and obtain sulphur calcium silicates for a period of time.By the sulphur calcium silicates of raw material of industry calcining preparation, it is applied in sulphate aluminium cement as modifying agent, can be improved the compression strength in 28 days later periods of cement, solve the problems, such as later strength retraction.The preparation of modified component sulphur calcium silicates mineral uses the raw material of industry, has many advantages, such as achievable large-scale production, simple process, low in cost.
Description
Technical field
The invention belongs to building material technical fields, are specifically related to the raw material of industry preparation and its conduct of sulphur calcium silicates
The method of modifying agent regulation sulphate aluminium cement stable long-term strength.
Background technique
It is due to low power consuming and environmentally friendly cement, compared to normal silicate that common sulphate aluminium cement, which is able to development,
Cement, firing temperature want low 100 DEG C.Which are mainly applied to repairing rush construction engineerings, prefabricated components, GRC product, low-temperature construction work
Journey, anti-seawater corrosion engineering etc..But common sulphate aluminium cement is since setting time is not easy to control, later strength growth is not shown
Even there is the disadvantages of retraction, hinder its further development and application.
It is presently mainly solved the above problems by introducing portland cement mineral in sulphate aluminium cement, such as A Li
Spy-sulphate aluminium cement, high belite-sulphate aluminium cement can preferably control setting time, improve later strength, but
It is that alite-sulphoaluminate cement clinker firing temperature is difficult to control, high belite sulphate aluminium cement cement later strength is sent out
It postpones slow.
All the time, sulphur calcium silicates is considered as a kind of inert mineral, however some researches show that sulphur calcium silicates in aluminium recently
Entringite and gel phase can be generated with acceleration of hydration under the incentive condition of source, it might even be possible to show than β-C2The better mechanical property of S
Energy.Current research discovery, silicon source C3A,C12A7, CA and C4A3 Etc. the hydration activity and capability of influence that can activate sulphur calcium silicates
Size order is C12A7≈CA>C3A>>>>C4A3 And sulphur calcium silicates changes the hydration heat curve of aluminate, shortens and lures
It leads the period, antedating response peak, per unit aluminic acid salt quality total amount of heat burst size rises 19%~91%, it was demonstrated that aluminate is in sulphur silicon
Hydration activity in the presence of sour calcium improves.
In view of will affect in cement by directly reducing sulphoaluminate cement clinker of the temperature generation containing sulphur calcium silicates
The performance of other mineral, while nature is at present again without providing the sulphur calcium silicates mineral that can directly use.Therefore the present invention
It proposes separately synthesized sulphur calcium silicates mineral and is introduced into sulphate aluminium cement system as modifying agent, solve later strength retraction
Problem.
Summary of the invention
In view of the above problems, the present invention prepares sulphur calcium silicates using the raw material of industry calcining of inexpensive and adds it to
Sulphate aluminium cement, improving sulphate aluminium cement later strength development trend makes it have fine quality, and uses the raw material of industry
It prepares sulphur calcium silicates easily to accomplish scale production, is conducive to realize engineer application.
The specific technical solution that the present invention uses is as follows:
(1) preparation of raw material calculates raw material proportioning according to Bogue formula first, in accordance with the stoichiometric equation of sulphur calcium silicates
Obtain lime stone 62%, silicon ash 18% and anhydrite 20%.By the raw material of industry, drying for 24 hours, waves moisture sufficiently in 100 DEG C of baking oven
Hair, then it proportionally mix be placed in batch mixer be uniformly mixed to get arrive raw material.
(2) calcining of clinker is put into mold compression moulding, and calcines at 1150-1175 DEG C and keep the temperature 1-2h and take out
It is cooled to room temperature in air, is that 200 meshes tail over≤10% through ball mill mixing, grinding to fineness, finally obtains product.
(3) regulate and control cement stable long-term strength, the two for the sulphur calcium silicates of preparation as sulphate aluminium cement modifying agent
It is uniformly mixed, wherein the mass ratio of sulphur calcium silicates is 5%-10%.
Sulphur calcium silicates mineral prepared by the invention patent are produced with sulphur calcium silicates pulverulent solids as main component
Product.
What is used in the present invention is raw material of industry lime stone, silicon ash and anhydrite, and oxidation is also contained in view of the raw material of industry
Other minerals such as magnesium, potassium oxide and sodium oxide molybdena, these impurity phases are more advantageous to the synthesis of sulphur calcium silicates as mineralizer.
Consider the decomposition of anhydrite at high temperature during above scheme, ingredient when can suitably increase its volume
2%-5%, to improve the purity of sulphur calcium silicates.
During above scheme, the fineness of the sulphur calcium silicates prepared after calcining is 100-200 mesh, preferably to make sulphur silicic acid
Calcium aquation.
As the optimization of above scheme, gypsum can also be selected as desulfurized gypsum.
Preferably, the mass parts of sulphur calcium silicates and dicalcium silicate are 70 in the mineral of the sulphur calcium silicates of preparation
± 10% and 30 ± 10%, wherein equally generating Beneficial Effect to later strength containing a small amount of dicalcium silicate.
The present invention has the advantage that
(1) raw material of industry for preparing sulphur calcium silicates is rich and easy to get, widely distributed, low in cost.And synthesis technology is simple,
It is energy saving, it is suitable for cement plant large-scale production.
(2) sulphur calcium silicates can be used as sulphate aluminium cement modifying agent, generate C-S-H with other substance reactions after dissolution
And entringite, this is conducive to the enhancement of slurry later strength.This can solve sulphate aluminium cement later strength retraction, to promote
Into the realization wider application of sulphate aluminium cement.
(3) it prepares in the mineral of sulphur calcium silicates and inevitably remains dicalcium silicate, this can't be to sulphate aluminium cement
Performance has an adverse effect, and dicalcium silicate equally can promote later strength with aquation.
The aquation principle of sulphur calcium silicates:
Specific embodiment
Below with reference to embodiment, the invention will be further described, but the present invention is not limited to following embodiments.
Embodiment 1
A kind of preparation method of sulphate aluminium cement modifying agent, specific implementation step and result are as follows: according to Bogue formula meter
Calculate the proportion of raw material, silicon ash and anhydrite: lime stone 62%, silicon ash 18% and anhydrite 20% are (in view of the high temperature of calcium sulfate
Decompose, suitably can increase 2%-5%s when ingredient more), it is uniformly mixed, compression moulding, and calcined simultaneously at 1150-1175 DEG C
1h is kept the temperature, is cooled to room temperature after taking-up in air, is that 200 meshes tail over≤10% through ball mill mixing, grinding to fineness, most
After obtain product.
The sulphur calcium silicates mineral synthesized in above-described embodiment 1 are carried out X-ray diffraction and quantify each component using TOPAS to contain
Amount, after measured the result is that sulphur calcium silicates 73.95% and dicalcium silicate 26.05%.
Embodiment 2
A kind of preparation method of sulphate aluminium cement modifying agent, specific implementation step and result are as follows: according to Bogue formula meter
Calculate the proportion of raw material, silicon ash and desulfurized gypsum (desulfurized gypsum is as optimum choice): lime stone 63%, silicon ash 17%, desulfurization stone
Cream 20% (in view of the pyrolytic of calcium sulfate, ingredient when suitably can increase 2%-5%), is uniformly mixed, is pressed into more
Type, and 1h is calcined and kept the temperature at 1150-1175 DEG C, room temperature is cooled to after taking-up in air, extremely through ball mill mixing, grinding
Fineness is that 200 meshes tail over≤10%, finally obtains product.
The sulphur calcium silicates mineral synthesized in above-described embodiment 2 are carried out X-ray diffraction and quantify each component using TOPAS to contain
Amount, after measured the result is that sulphur calcium silicates 76.79% and dicalcium silicate 23.21%.
It is steady to sulphate aluminium cement later strength as modifying agent in order to further verify sulphur calcium silicates prepared by the present invention
The effect of qualitative regulation is done modifying agent product quality to sulphur calcium silicates prepared by above-described embodiment 1 and embodiment 2 and is tested
Card.
Experiment takes sulphate aluminium cement as cementitious material, and is added in two embodiments according to the 10% of mass ratio
Product, prepare cement briquette according to standard, while also having set the cement that sulphur calcium silicates is not added as reference, according to GB/T
17671-1999 " cement strength testing method " test intensity, as a result see the table below 1.It can be obtained according to data in table, sulphur calcium silicates can
Sulphate aluminium cement stable long-term strength is improved as modifying agent.
1 compression strength of table
Claims (3)
1. a kind of method for improving sulphate aluminium cement stable long-term strength, it is characterised in that: using sulphate aluminium cement as base
Material, sulphur calcium silicates are modifying agent, and weight percent is as follows:
Sulphate aluminium cement 90%-95%,
Sulphur calcium silicates 5%-10%.
2. according to the method for claim 1, which is characterized in that the preparation method of sulphur calcium silicates specifically: by lime stone, silicon
Ash and anhydrite press following mass component: lime stone 62%, silicon ash 18% and anhydrite 20% are uniformly mixed, and are put into mold compacting
Molding, then calcines at 1150-1175 DEG C and keeps the temperature 1-2h, and taking-up is cooled to room temperature getting the product in air.
3. it is mixed in sulphate aluminium cement according to sulphur calcium silicates prepared by claim 2 the method as modifying agent, with
Solve the problems, such as sulphate aluminium cement later strength retraction.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112759334A (en) * | 2020-12-31 | 2021-05-07 | 山东大学 | Fiber cement board based on solid waste based sulphoaluminate cementing material and preparation method |
| CN112960929A (en) * | 2021-03-05 | 2021-06-15 | 北京工业大学 | Method for preparing calcium sulfosilicate-dicalcium silicate-calcium sulfoaluminate system from calcium carbide slag raw material and improving later strength of cement |
| CN114538803A (en) * | 2022-03-08 | 2022-05-27 | 郑州市嵩鼎企业集团有限公司 | Low-carbon high-strength micro-expansion cement clinker and preparation method and application thereof |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU652290A1 (en) * | 1977-05-16 | 1979-03-15 | Ташкентский Политехнический Институт Им. Р.А.Беруни | Hydraulic binder |
| CN104609434A (en) * | 2015-02-09 | 2015-05-13 | 重庆大学 | Preparation method and application method of calcium sulphosilicate mineral |
| CN104609750A (en) * | 2015-02-09 | 2015-05-13 | 重庆大学 | Sulphoaluminate cement and preparation method thereof |
| 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 |
| CN107793052A (en) * | 2017-11-29 | 2018-03-13 | 扬州大学 | A kind of Portland fly ash cement and preparation method thereof |
| CN107857493A (en) * | 2017-11-29 | 2018-03-30 | 扬州大学 | A kind of method that sulphate aluminium cement is modified |
| CN108314344A (en) * | 2018-01-24 | 2018-07-24 | 济南大学 | A kind of sulphur calcium silicate types phosphorus sulphoaluminate cement clinker |
| 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 |
| CN110078394A (en) * | 2019-05-15 | 2019-08-02 | 盐城工学院 | Low temperature preparation sulphur calcium silicates-belite sulphoaluminate cement clinker method |
| 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 |
-
2019
- 2019-08-30 CN CN201910815182.0A patent/CN110498631A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU652290A1 (en) * | 1977-05-16 | 1979-03-15 | Ташкентский Политехнический Институт Им. Р.А.Беруни | Hydraulic binder |
| CN104609434A (en) * | 2015-02-09 | 2015-05-13 | 重庆大学 | Preparation method and application method of calcium sulphosilicate mineral |
| CN104609750A (en) * | 2015-02-09 | 2015-05-13 | 重庆大学 | Sulphoaluminate cement and preparation method thereof |
| 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 |
| CN107793052A (en) * | 2017-11-29 | 2018-03-13 | 扬州大学 | A kind of Portland fly ash cement and preparation method thereof |
| CN107857493A (en) * | 2017-11-29 | 2018-03-30 | 扬州大学 | A kind of method that sulphate aluminium cement is modified |
| CN108314344A (en) * | 2018-01-24 | 2018-07-24 | 济南大学 | A kind of sulphur calcium silicate types phosphorus sulphoaluminate cement clinker |
| 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 |
| CN110078394A (en) * | 2019-05-15 | 2019-08-02 | 盐城工学院 | Low temperature preparation sulphur calcium silicates-belite sulphoaluminate cement clinker method |
| 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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112759334A (en) * | 2020-12-31 | 2021-05-07 | 山东大学 | Fiber cement board based on solid waste based sulphoaluminate cementing material and preparation method |
| CN112960929A (en) * | 2021-03-05 | 2021-06-15 | 北京工业大学 | Method for preparing calcium sulfosilicate-dicalcium silicate-calcium sulfoaluminate system from calcium carbide slag raw material and improving later strength of cement |
| CN114538803A (en) * | 2022-03-08 | 2022-05-27 | 郑州市嵩鼎企业集团有限公司 | Low-carbon high-strength micro-expansion cement clinker and preparation method and application thereof |
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Application publication date: 20191126 |