CN1040741C - High-efficiency concrete expansion admixture and preparing process thereof - Google Patents
High-efficiency concrete expansion admixture and preparing process thereof Download PDFInfo
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- CN1040741C CN1040741C CN94100423A CN94100423A CN1040741C CN 1040741 C CN1040741 C CN 1040741C CN 94100423 A CN94100423 A CN 94100423A CN 94100423 A CN94100423 A CN 94100423A CN 1040741 C CN1040741 C CN 1040741C
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- cement
- concrete
- swelling agent
- clinker
- expansion
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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
- C04B22/008—Cement and like inorganic materials added as expanding or shrinkage compensating ingredients in mortar or concrete compositions, the expansion being the result of a recrystallisation
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention provides a high-efficiency concrete expansion agent and a preparing process thereof, which is characterized in that the concrete expansion agent is prepared from 20 to 40% of sulphoaluminate cement clinker or 15 to 35% of calcium aluminate clinker, 35 to 60% of anhydrite, 6 to 60% of quicklime and 5 to 10% of natural alunite through mixed grinding. The expansion agent has the advantages of high expansion rate, less addition amount, low cost, reduced cement strength loss and reinforcement corrosion, alkali content below 0.5%, avoided or lightened concrete alkali-aggregate reaction, simple manufacturing process and easy operation, and is favorable for keeping cement alkalinity.
Description
The invention belongs to concrete filler component or technical field of concrete additives.
Available coagulation soil expansion agent kind is more both at home and abroad, and is main listed as table 1.All there is weak point in these swelling agents.For example, the calcium sulphoaluminate grog that contains a large amount of fcao that NO1 and NO2 use the calcining of high-quality alumina to form, energy consumption height, cost height, the rotary kiln burning techniques is still immature; And NO5 uses gypsum offscum, should not be used for water works; Except that NO.1 and NO.2, the alunite that all mixes more than 10% is made main component, and the alkali content of introducing is unfavorable for suppressing the concrete alkali more than 0.7%; The participation that each swelling agent all need rely on silicate cement hydration product C a (OH) 2 could form enough ettringite, and therefore, speed of expansion is slow, poor efficiency, often needs to increase the swelling agent consumption and just can play the compensate for shrinkage effect.NO9 and NO10 are expansion sources with Ca (OH) 2, should not be used for water works.
Task of the present invention provides that a kind of speed of expansion is very fast, rate of expansion is higher, efficient, low alkali content and the cement expansive material that has small expansion mid-term again, and its production technique is simple, easy to implement, cost is lower.
The present invention is achieved in that a kind of high-efficiency concrete expansion admixture and method for making thereof, it is characterized in that, by the sulphoaluminate cement clinker of 20-40% or the calcium aluminate clinker of 15-35%, the anhydrite of 35-60% or through the dihydrate gypsum of 400-500 ℃ of processed, the unslaked lime of 5-20%, the common grinding of the natural alumstone of 5-10% forms, and general specific surface area is greater than 250m
2/ kg gets final product.Above-mentioned sulphoaluminate cement clinker is made with rotary kiln or shaft kiln calcination with commercially available, so its cost is lower.
Reaction mechanism of the present invention is represented with following chemical equation:
2. formula reaches formula and 3. shows, forms the needed CaO of ettringite C3A3CaSO4H32, and mainly the unslaked lime that is contained by swelling agent self provides, and no longer relies on the hydrated product Ca (OH) 2 of C3S and C2S basically.Al2O3 by sulphoaluminate cement clinker provides can make big of phase or all form ettringite short, and the Al2O3 that is provided by alunite then forms ettringite in mid-term; Because being lower than, the unslaked lime that adds forms the required theoretical amount of ettringite, so CaO is not neither expansion sources can cause stability bad yet.
Advantage of the present invention is tangible:
(1) form the necessary CaO of ettringite because this swelling agent self has contained, the expansion function can obtain higher utilization in early days.
(2) owing to form the hydrated product Ca (OH) 2 that ettringite no longer consumes C3S and C2S basically, be beneficial to the maintenance silicate cement, particularly the basicity of slag cement, trass cement, pulverized fuel ash cement for reducing the concrete strength loss, prevents that steel bar corrosion is significant.
(3) because this swelling agent self only contains the alunite below 10%, when guaranteeing the small expansion that produces mid-term, make K2O+Na2O＜0.5%, be beneficial to and suppress the concrete alkali.
(4) only use milling equipment owing to make this swelling agent, need not calcine, so it is technology is simple, easy to implement; Because useful commercial raw material: sulphoaluminate cement clinker, so cost is reduced greatly.
(5) compare with the listed NO1 of the table 1 close, NO2 with this swelling agent, because with cheap unslaked lime and commercially available sulphoaluminate cement clinker, equivalence has replaced the special calcium sulphoaluminate grog that technical difficulty is big, unit-hour output is low, energy consumption is high, pollution is heavy, and the swelling agent production cost is reduced more than 50-60 unit/t.
(6) by Japanese J1S A6202-1980 or the standard test of Chinese JC476-92 cement expansive material, product performance reach and are higher than the level of standard code.Especially rate of expansion is higher, and consumption is less.
(7) use this swelling agent 6-10% equivalent to replace that cement can prepare expansive concrete, 11-13% equivalent replaces cement and can prepare big dilatation seams concrete, can form the self-stress value of 0.2-0.1MPa, receive the effect of anti-crack and anti-seepage, 18-23% equivalent replaces cement can prepare self-stressing concrete, and consumption is few, freight charges are low, construction investment is economized.
Table 2 is production examples.Table 3 has been listed the used starting material of embodiment and swelling agent Chemical Composition, swelling agent proportioning; Table 4 has been listed the swelling agent standard test performance under different curing conditions, swelling agent specific surface area 400m/kg, presetting period 1:30, final setting time 2:20; ' table 5 listed C28, the S with the preparation of this swelling agent
6The concrete determination data.
Table 1
Remarks: the used reference of table 1 is as follows:
| Sequence number | The swelling agent title | The main composition | Alkali content % | Producing country |
| NO1 | The CSA swelling agent | The calcium sulphoaluminate grog | Japan | |
| NO2 | Excellent type swelling agent | The calcium sulphoaluminate grog, anhydrite, alunite | 1.0-1.5 | China |
| NO3 | The U-II swelling agent | Natural alumstone, calcined alunite, anhydrite | 1.7-2.0 | China |
| NO4 | Aluminium sulfate expanding agent | The calcium sulphoaluminate grog, anhydrite, alunite | 1.0-1.5 | China |
| NO5 | Sulphoaluminate expander | Flyash, fluorgypsum | China | |
| NO6 | Bulking agent of calcium aluminate | Calcium aluminate clinker, anhydrite, alunite | 0.71 | China |
| NO7 | Alumite plumping agent | Alunite, gypsum | 2.5-3.0 | China |
| NO8 | The U-III swelling agent | The silico-aluminate grog, alunite, anhydrite | 0.9 | China |
| NO9 | The lime swelling agent | The lime grog | China | |
| NO10 | Composite expanding agent | The lime grog, alunite | 0.4-0.6 | China |
(1) Building technology, 1978, NO147, Japan.
(2) Chinese patent, CN85107101A.
(3) Chinese patent, 88102924.6.
(4) Chinese patent, 89108124.0.
(5) Chinese patent, 91110609.X.
(6) Chinese patent, 92105187.5.
(7) composite expanding agent technical evaluation certificate, 1987.
(8) alumite plumping agent technical evaluation certificate, 1980.
(9) You Baokun etc., " swelling agent and alkali-aggregate reaction ", 1992.
Table 2:
| Composition % example | Component proportioning (%) sulphoaluminate cement clinker anhydrite natural alumstone unslaked lime | Method for making |
| Embodiment 1 | 30 50 10 10 | Common grinding surface-area is greater than 250m/kg |
| Embodiment 2 | 25 60 7 8 | |
| Embodiment 3 | 35 45 8 12 |
Table 3
| Item is not | LoSS | SiO2 | AL2O3 | Fe2O3 | TiO2 | CaO | MgO |
| Sulphoaluminate cement clinker | 10.13 | 32.30 | 2.50 | 1.26 | 43.34 | 1.12 | |
| Anhydrite | 9.86 | 1.29 | 0.18 | 0.03 | 37.68 | 1.58 | |
| Alunite | 7.04 crystal water | 55.13 | 16.34 | 1.67 | 0.58 | 0.36 | 0.01 |
| Unslaked lime | 9.03 | 2.23 | 0.86 | 0.23 | 84.38 | 2.89 | |
| Swelling agent | 6.58 | 9.22 | 11.42 | 0.96 | 0.44 | 40.32 | 1.42 |
Table 3 is continuous
| Item is not | SO3 | K2O | Na2O | ∑ | Proportioning % |
| Sulphoaluminate cement clinker | 9.25 | 99.90 | 30.0 | ||
| Anhydrite | 49.05 | 99.67 | 50.0 | ||
| Alunite | 14.70 | 3.89 | 0.41 | 99.72 | 10.0 |
| Unslaked lime | 99.62 | 10.0 | |||
| Swelling agent | 28.78 | 0.39 | 0.04 | 99.87 |
Table 4
| NO | Place of cement rate % | Item is not | 3d | 7d | 14d | 28d | 42d |
| 01 | 12.0 | Limited expansion rate % folding strength MPa ultimate compression strength MPa | 0.034 | 0.062 5.9 39.2 | 0.088 6.8 49.5 | 0.077 8.0 53.8 | 0.049 |
| 02 | 10.0 | Limited expansion rate % folding strength MPa ultimate compression strength MPa | 0.027 3.9 19.8 | 0.053 5.1 32.3 | 0.079 | 0.092 8.1 49.7 | |
| 03 | 0.8 | Limited expansion rate % folding strength MPa ultimate compression strength MPa | 0.034 6.6 37.5 | 0.044 | 7.3 50.6 | 0.012 |
Continuous table 4
| NO | Place of cement rate % | Item is not | 180d | 360d | Remarks |
| 01 | 12.0 | Limited expansion rate % folding strength MPa ultimate compression strength MPa | 0.107 8.1 64.7 | 14d water outlet 42d backwater | |
| 02 | 10.0 | Limited expansion rate % folding strength MPa ultimate compression strength MPa | 0.130 8.4 68.7 | Water is supported | |
| 03 | 0.8 | Limited expansion rate % folding strength MPa ultimate compression strength MPa | The 14d water outlet |
Table 5
| Item is not | 3d | 7d | 14d | 28d | 360d | Remarks |
| Limited expansion rate % | 0.011 | 0.014 | 0.018 | 0.033 | 0.045 | Replace cement rate 10% |
| Ultimate compression strength MPa | 27.9 | 33.1 | 35.3 | 49.9 |
Claims (2)
1, a kind of high-efficiency concrete expansion admixture and method for making thereof, it is characterized in that, by the sulphoaluminate cement clinker of 20-40% or the calcium aluminate clinker of 15-35%, the anhydrite of 35-60% or through the dihydrate gypsum of 400-500 ℃ of processed, the unslaked lime of 5-20%, the common grinding of the natural alumstone of 5-10% forms.
2, high-efficiency concrete expansion admixture according to claim 1 and method for making thereof is characterized in that used sulphoaluminate cement clinker is commercially available making with rotary kiln or shaft kiln calcination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94100423A CN1040741C (en) | 1994-01-28 | 1994-01-28 | High-efficiency concrete expansion admixture and preparing process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94100423A CN1040741C (en) | 1994-01-28 | 1994-01-28 | High-efficiency concrete expansion admixture and preparing process thereof |
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| Publication Number | Publication Date |
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| CN1092747A CN1092747A (en) | 1994-09-28 |
| CN1040741C true CN1040741C (en) | 1998-11-18 |
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| CN94100423A Expired - Fee Related CN1040741C (en) | 1994-01-28 | 1994-01-28 | High-efficiency concrete expansion admixture and preparing process thereof |
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|---|---|---|---|---|
| CN101450849B (en) * | 2007-11-30 | 2011-08-24 | 中国京冶工程技术有限公司 | Expansion agent for composite high performance grouting |
| CN102249585A (en) * | 2011-06-08 | 2011-11-23 | 福建省交通科学技术研究所 | Micro-expansive super early strength modifier for cement and using method thereof |
| CN102491669B (en) * | 2011-11-14 | 2012-12-26 | 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 |
| CN102587447B (en) * | 2012-02-07 | 2014-07-09 | 中国农业大学 | Water harvesting surface for collecting rainfall and method for manufacturing water harvesting surface |
| CN105814319B (en) * | 2013-12-24 | 2018-04-27 | 三菱重工业株式会社 | Compressor and booster |
| CN103979815B (en) * | 2014-05-27 | 2016-01-06 | 长沙矿山研究院有限责任公司 | A kind of obturator swelling agent for mining with stowing and preparation method thereof |
| CN104108897B (en) * | 2014-06-25 | 2016-03-23 | 芜湖市三兴混凝土外加剂有限公司 | Cement expansive material |
| CN106116237A (en) * | 2016-07-06 | 2016-11-16 | 无锡市华东电力设备有限公司 | A kind of extender |
| CN108503250A (en) * | 2018-03-07 | 2018-09-07 | 湖北乾道新型材料有限责任公司 | Cement expansive material and preparation method |
| US10947159B2 (en) * | 2019-03-21 | 2021-03-16 | Tangshan Polar Bear Building Materials Co., Ltd. | Granulated blast-furnace slag activator, its manufacturing method thereof, and manufacturing method of cement |
| CN111470799B (en) * | 2020-03-20 | 2022-03-25 | 浙江交工宏途交通建设有限公司 | Composite concrete expanding agent |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1048535A (en) * | 1989-07-03 | 1991-01-16 | 山东省莒南县水泥厂 | Expansion self-stressed agent |
| CN1051161A (en) * | 1989-10-21 | 1991-05-08 | 一冶特综新型建材厂 | Calcium aluminosulfated type cement swelling agent and technology |
| CN1068558A (en) * | 1992-07-11 | 1993-02-03 | 浙江大学 | Aluminium sulfate expanding agent and manufacture method thereof |
| JP6261548B2 (en) * | 2015-09-28 | 2018-01-17 | 株式会社ＦｉＮＣ | Health management server, health management server control method, and health management program |
-
1994
- 1994-01-28 CN CN94100423A patent/CN1040741C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1048535A (en) * | 1989-07-03 | 1991-01-16 | 山东省莒南县水泥厂 | Expansion self-stressed agent |
| CN1051161A (en) * | 1989-10-21 | 1991-05-08 | 一冶特综新型建材厂 | Calcium aluminosulfated type cement swelling agent and technology |
| CN1068558A (en) * | 1992-07-11 | 1993-02-03 | 浙江大学 | Aluminium sulfate expanding agent and manufacture method thereof |
| JP6261548B2 (en) * | 2015-09-28 | 2018-01-17 | 株式会社ＦｉＮＣ | Health management server, health management server control method, and health management program |
Non-Patent Citations (1)
| Title |
|---|
| 建筑材料实用配言手册 1991.5.1 姚治邦 河海大学出版社 * |
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| CN1092747A (en) | 1994-09-28 |
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