CN102910851A - Q-phase aluminate cement expanding agent and preparation method thereof - Google Patents
Q-phase aluminate cement expanding agent and preparation method thereof Download PDFInfo
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- CN102910851A CN102910851A CN2012104035782A CN201210403578A CN102910851A CN 102910851 A CN102910851 A CN 102910851A CN 2012104035782 A CN2012104035782 A CN 2012104035782A CN 201210403578 A CN201210403578 A CN 201210403578A CN 102910851 A CN102910851 A CN 102910851A
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- cement
- aluminate
- cement clinker
- swelling agent
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Abstract
The invention relates to a Q-phase aluminate cement expanding agent and a preparation method thereof, which belong to the technical field of additives of cement and concrete materials. The Q-phase aluminate cement expanding agent consists of 60-40 percent of Q-phase cement clinker and 40-60 percent of industrial dihydrate gypsum, wherein the Q-phase cement clinker contains 80-99.9 percent of Q-phase aluminate minerals. Compared with concrete prepared by using the conventional expanding agent (a sulfoaluminate expanding agent taking ettringite as an expanding source), concrete prepared by using the Q-phase aluminate cement expanding agent has the advantages that: the free swell ratio at middle and later periods is increased remarkably; in particular, the free swell ratio is much higher than that of the conventional expanding agent 30 days later; and later-period contraction of concrete can be compensated.
Description
Technical field
The present invention relates to a kind of Q phase aluminate cement swelling agent and preparation method thereof, belong to the admixture technical field of cement and concrete material.
Background technology
Expansive agent for cement slurry is a kind of chemical admixture, is added in the cement, and when cement setting hardened, thereupon volumetric expansion played compensate for shrinkage and tension reinforcing steel bar and produces prestress and abundant filling concrete gap.At present, though traditional sulplo-aluminate class swelling agent take ettringite as expansion sources has the fast advantage of hydration rate, but before its expansion mainly occurs in 7 d, exist to be difficult to shortcomings such as the contraction of cement-based material middle and later periods compensate.
Summary of the invention
In order to solve existing sulplo-aluminate class swelling agent take ettringite as expansion sources, the technical problem that can't shrink the compensation water cement-based material middle and later periods, the invention provides a kind of fast advantage of hydration rate that both possessed, possess simultaneously the Q phase aluminate cement swelling agent of the advantage of middle and later periods expansion.The present invention also provides the preparation method of this Q phase aluminate cement swelling agent.
Technical scheme
A kind of Q phase aluminate cement swelling agent is comprised of the Q phase cement clinker of 60%-40% and 40%-60% industry dihydrate gypsum;
The Q phase aluminium mineral material that contains 80-99.9% in the described Q phase cement clinker;
Described percentage ratio is mass percent.
Q phase aluminium mineral material refers to consist of 6CaO.4Al
2O
3.MgO.SiO
2Mineral; Q phase (The Quaternary Phase) refers to CaO-Al
2O
3-MgO-SiO
2Stable phase in the quaternary system.
Above-mentioned Q phase aluminate cement swelling agent also contains the monocalcium aluminate (being called for short CA) of 0.1-15% and the C 12 A 7 of 0.1-5% and (is called for short C in the described Q phase cement clinker
12A
7), described percentage ratio is mass percent.
Above-mentioned Q phase aluminate cement swelling agent preferably is comprised of 60% Q phase cement clinker and 40% industrial dihydrate gypsum.
Above-mentioned Q phase aluminate cement swelling agent, described Q phase cement clinker preferably are comprised of 90%Q phase aluminium mineral material, 5% monocalcium aluminate and 5% C 12 A 7.
Above-mentioned Q phase aluminate cement swelling agent, described Q phase cement clinker are preferably broken by 50-54% bauxitic clay, 36-40% Wingdale and 8-10% rhombspar process, grinding, and moulding, calcining forms; Described percentage ratio is mass percent.
Above-mentioned Q phase aluminate cement swelling agent, Q phase cement clinker wherein and the granularity of industrial dihydrate gypsum are controlled to be by 200 order square hole sieves, are 6% tail over less than weight percentage.
The present invention also provides a kind of preparation method of above-mentioned Q phase aluminate cement swelling agent: Q phase cement clinker and industrial dihydrate gypsum is broken respectively, then mix; Carry out again grinding, granularity is controlled at by 200 order square hole sieves, less than 6% tail over; Both got product.
Q phase aluminate cement swelling agent of the present invention in use, the addition that every gram cement needs is 0.02-0.06g.
Beneficial effect
Use the prepared concrete of this Q phase aluminate cement swelling agent concrete prepared with using conventional expanded agent (adopting ettringite to be the sulplo-aluminate class swelling agent of expansion sources) to compare, the degree of free swelling in its early stage is basically identical; And the degree of free swelling of middle and later periods is significantly improved; Especially 30 days later degree of free swelling are more much bigger than the rate of expansion of conventional expanded agent.Therefore, Q phase aluminate cement swelling agent of the present invention possesses take ettringite as expansion sources the characteristics of early stage its expansion, possesses simultaneously the characteristics that the brucite middle and later periods expands, and has remedied the deficiency of conventional expanded agent; Later stage that can compensating concrete shrinks.
Simultaneously, Q phase aluminate cement swelling agent prescription of the present invention is simple, and production technique is simple, is of value to production in enormous quantities.
Identical concrete material, adopting respectively ettringite is the sulplo-aluminate class swelling agent (be called for short conventional expanded agent) of expansion sources, the Q phase aluminate cement swelling agent of embodiment 1-3 preparation (being called for short Q phase swelling agent), is that the ratio of 6:94 prepares concrete according to the mass ratio of swelling agent and cement; Then test respectively concrete degree of free swelling (many parts of concrete statistic datas) such as following table:
| The length of time | The conventional expanded agent | Q phase swelling agent |
| Rate of expansion (3 days) | 3.63×10 -4 | 3.12- 4.67×10 -4 |
| Rate of expansion (7 days) | 4.40×10 -4 | 5.32 ?- 5.80×10 -4 |
| Rate of expansion (28 days) | 5.65×10 -4 | 8.60 ?- 10.45×10 -4 |
| Rate of expansion (60 days) | 6.32×10 -4 | 10.56 ?- 14.82×10 -4 |
As seen from the above table, after 7 days, the degree of free swelling that adopts Q phase aluminate cement swelling agent of the present invention is that the degree of free swelling of sulplo-aluminate class swelling agent of expansion sources is much bigger than adopting ettringite.
Embodiment
Percentage ratio described in the following embodiment 1-3 is mass percent.
Embodiment 1
The preparation of Q phase cement clinker: adopt bauxitic clay 52.57%, the ratio preparation 1000 gram Q of Wingdale 38.35% and rhombspar 9.08% are cement slurry mutually; Through the jaw crushing crusher machine, then enter the planet mill grinding, the calcining of globars electric furnace is adopted in moulding again, normal temperature rise rate (10 ℃/min), firing temperature is controlled at 1250 ~ 1300 ℃, soaking time 30min; Get the Q phase cement clinker, wherein Q phase aluminium mineral material content is that the content of 80%, CA is 15%, C
12A
7Content be 5%;
Contain the preparation of the expansive agent for cement slurry of Q phase aluminate: prepare raw material 400 grams according to the proportioning of 60%Q phase cement clinker and 40% industrial dihydrate gypsum; Q phase cement clinker and industrial dihydrate gypsum is broken respectively, then mix; Adopt planet mill to carry out grinding, granularity is controlled at by 200 order square hole sieves, 6% tail over; Both got product.
Detect to use the concrete degree of free swelling of this product: according to the expansive agent for cement slurry of Q phase aluminate be 6%, cement is 94% ratio feeding 5000 grams; It is fully mixed; Water cement ratio (W/C) is than being 0.3; Mould is 25 * 25 * 275 3 gang mould moulding; The degree of free swelling that records each length of time is: 3d is 4.67 * 10
-4, 7d is 5.80 * 10
-4, 28d is 10.45 * 10
-4, 60d is 14.82 * 10
-4
Embodiment 2
The preparation of Q phase cement clinker: adopt bauxitic clay 50%, the ratio preparation 1000 gram Q of Wingdale 40% and rhombspar 10% are cement slurry mutually; Through the jaw crushing crusher machine, then enter the planet mill grinding, the calcining of globars electric furnace is adopted in moulding again, normal temperature rise rate (10 ℃/min), firing temperature is controlled at 1250 ~ 1300 ℃, soaking time 30min; Get the Q phase cement clinker, wherein Q phase aluminium mineral material content is that the content of 90%, CA is 5%, C
12A
7Content be 5%;
Contain the preparation of the expansive agent for cement slurry of Q phase aluminate: prepare raw material 400 grams according to the proportioning of 50%Q phase cement clinker and 50% industrial dihydrate gypsum; Q phase cement clinker and industrial dihydrate gypsum is broken respectively, then mix; Adopt planet mill to carry out grinding, granularity is controlled at by 200 order square hole sieves, 6% sieve; Both got product.
Detect to use the concrete degree of free swelling of this product: according to the expansive agent for cement slurry of Q phase aluminate be 6%, cement is 94% ratio feeding 5000 grams; It is fully mixed; Water cement ratio (W/C) is than being 0.3; Mould is 25 * 25 * 275 3 gang mould moulding, and the degree of free swelling that records each length of time is:: 3d is 3.27 * 10
-4, 7d is 5.36 * 10
-4, 28d is 10.05 * 10
-4, 60d is 14.60 * 10
-4
Embodiment 3
The preparation of Q phase cement clinker: adopt bauxitic clay 54%, the ratio preparation 1000 gram Q of Wingdale 36% and rhombspar 8% are cement slurry mutually; Through the jaw crushing crusher machine, then enter the planet mill grinding, the calcining of globars electric furnace is adopted in moulding again, normal temperature rise rate (10 ℃/min), firing temperature is controlled at 1250 ~ 1300 ℃, soaking time 30min; Get the Q phase cement clinker, wherein Q phase aluminium mineral material content is that the content of 85%, CA is 10%, C
12A
7Content be 5%;
Contain the preparation of the expansive agent for cement slurry of Q phase aluminate: prepare raw material 400 grams according to the proportioning of 40%Q phase cement clinker and 60% industrial dihydrate gypsum; Q phase cement clinker and industrial dihydrate gypsum is broken respectively, then mix; Then mix; Adopt planet mill to carry out grinding, granularity is controlled at by 200 order square hole sieves, 6% tail over; Both got product.
Detect to use the concrete degree of free swelling of this product: according to the expansive agent for cement slurry of Q phase aluminate be 6%, cement is 94% ratio feeding 5000 grams; It is fully mixed; Water cement ratio (W/C) is than being 0.3; Mould is 25 * 25 * 275 3 gang mould moulding, and the degree of free swelling that records each length of time is:: 3d is 3.12 * 10
-4, 7d is 5.32 * 10
-4, 28d is 8.60 * 10
-4, 60d is 10.56 * 10
-4
Claims (7)
1. a Q phase aluminate cement swelling agent is characterized in that, is comprised of the Q phase cement clinker of 60%-40% and 40%-60% industry dihydrate gypsum;
The Q phase aluminium mineral material that contains 80-99.9% in the described Q phase cement clinker;
Described percentage ratio is mass percent.
2. Q phase aluminate cement swelling agent according to claim 1 is characterized in that, also contain the monocalcium aluminate of 0.1-15% and the C 12 A 7 of 0.1-5% in the described Q phase cement clinker, described percentage ratio is mass percent.
3. Q phase aluminate cement swelling agent according to claim 1 is characterized in that the content of Q phase cement clinker is 60%, and the content of industrial dihydrate gypsum is 40%.
4. according to claim 1 or 3 described Q phase aluminate cement swelling agents, it is characterized in that described Q phase cement clinker is comprised of 90%Q phase aluminium mineral material, 5% monocalcium aluminate and 5% C 12 A 7.
5. according to claim 1,2 or 3 described Q phase aluminate cement swelling agents, it is characterized in that, the Q phase cement clinker by 50-54% bauxitic clay, 36-40% Wingdale and 8-10% rhombspar through broken, grinding, moulding, calcining forms; Described percentage ratio is mass percent.
6. Q phase aluminate cement swelling agent according to claim 5 is characterized in that, it is 6% tail over that Q phase cement clinker wherein and the granularity of industrial dihydrate gypsum are controlled to be by 200 order square hole sieves, less than weight percentage.
7. the preparation method of the described Q phase of a claim 1-6 aluminate cement swelling agent: Q phase cement clinker and industrial dihydrate gypsum is broken respectively, then mix; Carrying out grinding again, granularity is controlled at by 200 order square hole sieves, is 6% tail over less than weight percentage; Both got product.
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|---|---|---|---|
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|---|---|---|---|
| CN201210403578.2A CN102910851B (en) | 2012-10-22 | 2012-10-22 | Q-phase aluminate cement expanding agent and preparation method thereof |
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| CN102910851A true CN102910851A (en) | 2013-02-06 |
| CN102910851B CN102910851B (en) | 2014-04-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104529215A (en) * | 2014-12-17 | 2015-04-22 | 武汉三源特种建材有限责任公司 | Phosphogypsum expanding agent and preparation method thereof |
| CN113264699A (en) * | 2021-04-14 | 2021-08-17 | 济南大学 | Q/P phase cement clinker containing calcium aluminate |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1600727A (en) * | 2004-10-22 | 2005-03-30 | 济南大学 | Aluminate cement material of containing mineral in Q phase |
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2012
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1600727A (en) * | 2004-10-22 | 2005-03-30 | 济南大学 | Aluminate cement material of containing mineral in Q phase |
Non-Patent Citations (3)
| Title |
|---|
| 《材料科学与工程学报》 20050228 姜奉华等 Q相-CA-C12A7水泥膨胀性能的研究 第124页"2.1 实验原料"和第125页"2.4 实验设计" 1-7 第23卷, 第1期 * |
| 姜凤华: "Q相-CA-C12A7高铝水泥烧成的正交试验研究", 《济南大学学报》 * |
| 姜奉华等: "Q相-CA-C12A7水泥膨胀性能的研究", 《材料科学与工程学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104529215A (en) * | 2014-12-17 | 2015-04-22 | 武汉三源特种建材有限责任公司 | Phosphogypsum expanding agent and preparation method thereof |
| CN113264699A (en) * | 2021-04-14 | 2021-08-17 | 济南大学 | Q/P phase cement clinker containing calcium aluminate |
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| Publication number | Publication date |
|---|---|
| CN102910851B (en) | 2014-04-16 |
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