CN104386938A - Multifunctional expanding agent for seamless construction of super-long concrete structure - Google Patents
Multifunctional expanding agent for seamless construction of super-long concrete structure Download PDFInfo
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- CN104386938A CN104386938A CN201410597023.5A CN201410597023A CN104386938A CN 104386938 A CN104386938 A CN 104386938A CN 201410597023 A CN201410597023 A CN 201410597023A CN 104386938 A CN104386938 A CN 104386938A
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Abstract
The invention relates to a multifunctional expanding agent for seamless construction of a super-long concrete structure. The expanding agent comprises the following components in parts by weight: 44-67 parts of a sulphoaluminate clinker, 15-25 parts of karstenite, 5-8 parts of magnesium oxide, 5-10 parts of calcium oxide, 1-2.5 parts of tartaric acid, 1.5-2.5 parts of a dispersing agent, 3.5-5.5 parts of sodium silicate and 2.5-7.5 parts of sodium carbonate. The multifunctional expanding agent disclosed by the invention is scientific in compatibility, simple to manufacture and wide in material source, can be used for rapidly meeting the strength development requirements of the super-long concrete structure, and can be used for providing reasonable shrinkage-compensating capacity.
Description
Technical field
The invention belongs to swelling agent field, especially a kind of for Overlong Concrete Structure jointless construction multifunctional expanded dose.
Background technology
In recent years, along with Building technology develop rapidly, construction work is to growing up and multifunction development, and some Overlong Concrete Structure constantly occur.In these Overlong Concrete Structure arrangement and method for construction, usual employing arranges post-cast strip and ftractures to prevent structure both shrinks, but this arrangement and method for construction can bring certain trouble to structure design and construction.As the cleaning of last-cost joint and dabbing bring certain trouble to joint filling, and extend the duration, template turnover is slow, precipitation and construction management expense increase.Therefore, a kind of expansive concrete technology is arisen at the historic moment.Under the ratio of reinforcement is 0.2%-0.8%, adopt expansive concrete, the prestress of 0.2MPa-0.7MPa can be set up in the structure, this prestress roughly can compensating concrete in process of setting, the temperature difference produced and drying shrinkage tensile stress, thus Crack Control within the scope of harmless crack.Based on this principle, when adopting expansive concrete, after being provided with expansion reinforcing band, ultra-long concrete continuous pouring length reaches 120m is safe, stays a post-cast strip concrete continuous pouring length to add more than 3 times than custom requirements 30m-40m, has more the Technological Economy meaning of reality.Adopt expansive concrete, it is the selecting of swelling agent most importantly.
For swelling agent, have large quantifier elimination both at home and abroad at present.Through finding the retrieval of prior art, Chinese patent literature CN102336533, publication date: 2012.08.01, describes a kind of alunite expansion agent for concrete, primarily of tschermigite, natural alumstone and natural dehydrated gyp-formulated according to a certain percentage.Such as Chinese patent literature CN1022942323A again, publication date: 2013.02.2, describe a kind of low-alkali concrete high-efficiency expanding agent, the metakaolinite that main kaolinite generates after high-temperature calcination and alunite, anhydrite by a certain percentage grinding mixed preparing forms.From existing documents and materials, existing swelling agent is mostly prepare with calcined kaolin, high alumina coal gangue, alunite, anhydrous calcium sulphoaluminate or calcium aluminate clinker and gypsum, and its shortcoming is the problems such as ubiquity rate of expansion is slow, expansion energy is low, waterproof expansion is little, expansion stable period is long.And modern concrete has that early strength is high, fragility large, the feature of stress relaxation ability, therefore there is the contradiction of bulging force that swelling agent provides and concrete strength un-coordinated development, cause compensate for shrinkage scarce capacity.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of multifunctional expanded dose for Overlong Concrete Structure jointless construction is provided, this swelling agent scientific compatibility, make simple, material source is extensive, can Rapid matching Overlong Concrete Structure strength development requirement, rational compensate for shrinkage ability is provided.
The present invention solves its technical problem and is achieved through the following technical solutions:
A kind of for Overlong Concrete Structure jointless construction multifunctional expanded dose, component and the ratio of weight and number thereof of its swelling agent are respectively:
And component and the optimum ratio of weight and number thereof of described swelling agent are respectively:
And described sulfoaluminate clinker is the aluminum ore of 55 parts by parts by weight, the dihydrate gypsum combined grinding of the Wingdale of 30 parts and 15 parts, is prepared from the temperature lower calcination 1h of 1350-1400 DEG C.
And described anhydrite is the plaster of paris, its fineness is 300 orders.
And described magnesium oxide was burned magnesium oxide, formed through 1300-1400 DEG C of high-temperature calcination by magnesite, its fineness was less than 350 orders.
And described calcium oxide is light-burned calcium oxide, be by calcite after fragmentation, form through 900-1100 DEG C of high-temperature calcination, its fineness is less than 300 orders.
And, described tartrate to be purity be more than 99% pressed powder.
And described dispersion agent is commercially available pull open powder.
And described water glass is technical grade instantly-soluble water glass powder.
And described sodium carbonate is technical grade anhydrous sodium carbonate powder.
Advantage of the present invention and beneficial effect are:
The present invention mainly utilizes calcareous grog, ettringite and magnesia grog three expansion sources to interact, appropriately combined, learns from other's strong points to offset one's weaknesses, and its expansion effect is three's superposition, has good compensating action.What is more important, active recrystallize component is compounded with in the present invention, when super-long structural concrete causes cracking due to drying shrinkage or warm and humid change, moisture enters into inside concrete by microfracture, under alkaline environment effect, tartrate and sodium carbonate and water glass generation priming reaction, form needle-like crystal and fill and seal concrete microfracture, thus realize the permanent water proof anti-seepage function of Overlong Concrete Structure.Compared with prior art, invention introduces retardant, dispersion agent and activated crystalline component, it can not only compensate the contraction that Overlong Concrete Structure produces in hydration and hardening process, contraction long-term after centering also has higher restraining effect, and has self-healing function to the microfracture of Overlong Concrete Structure.Said multifunctional expanded dose of the present invention has following technological merit: easy construction, mixes in concrete and can delay hydrated cementitious, improve its mobility.
Embodiment
Below by specific embodiment, the invention will be further described, and following examples are descriptive, is not determinate, can not limit protection scope of the present invention with this.
Embodiment 1
A kind of for Overlong Concrete Structure jointless construction multifunctional expanded dose, component and the weight thereof of its swelling agent are respectively: sulfoaluminate clinker 67.0Kg; Anhydrite 15.0Kg; Magnesium oxide 5.0Kg; Calcium oxide 5.0Kg; Tartrate 1.0Kg; Dispersion agent 1.5Kg; Water glass 3.5Kg; Sodium carbonate 2.5Kg.Sulfoaluminate clinker is the aluminum ore of 55 parts by parts by weight, and the dihydrate gypsum combined grinding of the Wingdale of 30 parts and 15 parts, is prepared from the temperature lower calcination 1h of 1400 DEG C.Anhydrite is the plaster of paris, and its fineness is 300 orders.Magnesium oxide was burned magnesium oxide, and formed through 1400 DEG C of high-temperature calcinations by magnesite, its fineness is less than 350 orders.Calcium oxide is light-burned calcium oxide, is by calcite after fragmentation, and form through 1100 DEG C of high-temperature calcinations, its fineness is less than 300 orders.Tartrate to be purity be more than 99% pressed powder.Dispersion agent is commercially available pull open powder.Water glass is technical grade instantly-soluble water glass powder.Sodium carbonate is technical grade anhydrous sodium carbonate powder.
Embodiment 2
A kind of for Overlong Concrete Structure jointless construction multifunctional expanded dose, component and the weight thereof of its swelling agent are respectively: sulfoaluminate clinker 44.0Kg; Anhydrite 25.0Kg; Magnesium oxide 8.0Kg; Calcium oxide 10.0Kg; Tartrate 1.5Kg; Dispersion agent 1.0Kg; Water glass 5.5Kg; Sodium carbonate 5.0Kg.Sulfoaluminate clinker is the aluminum ore of 55 parts by parts by weight, and the dihydrate gypsum combined grinding of the Wingdale of 30 parts and 15 parts, is prepared from the temperature lower calcination 1h of 1350 DEG C.Anhydrite is the plaster of paris, and its fineness is 300 orders.Magnesium oxide was burned magnesium oxide, and formed through 1300 DEG C of high-temperature calcinations by magnesite, its fineness is less than 350 orders.Calcium oxide is light-burned calcium oxide, is by calcite after fragmentation, and form through 900 DEG C of high-temperature calcinations, its fineness is less than 300 orders.Tartrate to be purity be more than 99% pressed powder.Dispersion agent is commercially available pull open powder.Water glass is technical grade instantly-soluble water glass powder.Sodium carbonate is technical grade anhydrous sodium carbonate powder.
Embodiment 3
A kind of for Overlong Concrete Structure jointless construction multifunctional expanded dose, component and the weight thereof of its swelling agent are respectively: sulfoaluminate clinker 49.5Kg; Anhydrite 20.0Kg; Magnesium oxide 6.5Kg; Calcium oxide 7.5Kg; Tartrate 2.5Kg; Dispersion agent 2.0Kg; Water glass 4.5Kg; Sodium carbonate 7.5Kg.Sulfoaluminate clinker is the aluminum ore of 55 parts by parts by weight, and the dihydrate gypsum combined grinding of the Wingdale of 30 parts and 15 parts, is prepared from the temperature lower calcination 1h of 1400 DEG C.Anhydrite is the plaster of paris, and its fineness is 300 orders.Magnesium oxide was burned magnesium oxide, and formed through 1400 DEG C of high-temperature calcinations by magnesite, its fineness is less than 350 orders.Calcium oxide is light-burned calcium oxide, is by calcite after fragmentation, and form through 900 DEG C of high-temperature calcinations, its fineness is less than 300 orders.Tartrate to be purity be more than 99% pressed powder.Dispersion agent is commercially available pull open powder.Water glass is technical grade instantly-soluble water glass powder.Sodium carbonate is technical grade anhydrous sodium carbonate powder.
The present invention claims required to get sulfoaluminate clinker, anhydrite, magnesium oxide, calcium oxide, tartrate, dispersion agent, water glass and sodium carbonate by formula rate, stirs, form product, pack in stirrer.
According to GB23439-2009 standard, the concrete multifunction swelling agent of embodiment 1-3 is carried out to the mensuration of projects index, meet the standard of performance index I type, concrete test result is as shown in table 1:
The standard test of table 1 embodiment 1-3 cement expansive material projects index
Claims (10)
1. one kind for multifunctional expanded dose of Overlong Concrete Structure jointless construction, it is characterized in that: component and the ratio of weight and number thereof of this swelling agent are respectively:
2. for Overlong Concrete Structure jointless construction multifunctional expanded dose according to claim 1, is characterized in that: component and the optimum ratio of weight and number thereof of described swelling agent are respectively:
3. for Overlong Concrete Structure jointless construction multifunctional expanded dose according to claim 1, it is characterized in that: described sulfoaluminate clinker is the aluminum ore of 55 parts by parts by weight, the dihydrate gypsum combined grinding of the Wingdale of 30 parts and 15 parts, is prepared from the temperature lower calcination 1h of 1350-1400 DEG C.
4. for Overlong Concrete Structure jointless construction multifunctional expanded dose according to claim 1, it is characterized in that: described anhydrite is the plaster of paris, its fineness is 300 orders.
5. for Overlong Concrete Structure jointless construction multifunctional expanded dose according to claim 1, it is characterized in that: described magnesium oxide was burned magnesium oxide, formed through 1300-1400 DEG C of high-temperature calcination by magnesite, its fineness is less than 350 orders.
6. for Overlong Concrete Structure jointless construction multifunctional expanded dose according to claim 1, it is characterized in that: described calcium oxide is light-burned calcium oxide, be by calcite after fragmentation, form through 900-1100 DEG C of high-temperature calcination, its fineness is less than 300 orders.
7. for Overlong Concrete Structure jointless construction multifunctional expanded dose according to claim 1, is characterized in that: described tartrate to be purity be more than 99% pressed powder.
8. for Overlong Concrete Structure jointless construction multifunctional expanded dose according to claim 1, is characterized in that: described dispersion agent is commercially available pull open powder.
9. for Overlong Concrete Structure jointless construction multifunctional expanded dose according to claim 1, is characterized in that: described water glass is technical grade instantly-soluble water glass powder.
10. for Overlong Concrete Structure jointless construction multifunctional expanded dose according to claim 1, is characterized in that: described sodium carbonate is technical grade anhydrous sodium carbonate powder.
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Cited By (5)
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| CN106630849A (en) * | 2016-12-29 | 2017-05-10 | 安徽华塑股份有限公司 | Quick-setting silicate expansion plugging agent and application method thereof |
| CN106938896A (en) * | 2017-03-28 | 2017-07-11 | 中交第航务工程局有限公司 | A kind of cement expansive material and preparation method and application |
| CN107365097A (en) * | 2017-08-28 | 2017-11-21 | 广东粤盛特种建材有限公司 | A kind of magnesium concrete damage self-repairing additive and preparation method thereof |
| CN109809733A (en) * | 2017-11-20 | 2019-05-28 | 贵州凯襄新材料有限公司 | A kind of cement expansive material and preparation method thereof |
| CN110627405A (en) * | 2019-11-01 | 2019-12-31 | 江苏苏博特新材料股份有限公司 | Expansion material with slower reaction rate and preparation method thereof |
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| CN102815883A (en) * | 2012-08-29 | 2012-12-12 | 河南铝城聚能实业有限公司 | Fiber composite capillary-crystalline expanding agent and preparation method thereof |
| CN102875082A (en) * | 2011-07-14 | 2013-01-16 | 上海惠邦特种涂料有限公司 | Cement-based permeable crystalline core master batch and its application |
| CN103435317A (en) * | 2013-08-16 | 2013-12-11 | 武汉理工大学 | Compound expanding agent for inhibiting temperature rising in early stage and promoting hydration in later stage and preparation method thereof |
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| CN1772692A (en) * | 2005-09-22 | 2006-05-17 | 武汉理工大学 | High-energy delay expanding agent for closed concrete and its prepn |
| CN101456697A (en) * | 2008-12-31 | 2009-06-17 | 广西云燕特种水泥建材有限公司 | Retardation pumping type three-expansion source cement expansive material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106630849A (en) * | 2016-12-29 | 2017-05-10 | 安徽华塑股份有限公司 | Quick-setting silicate expansion plugging agent and application method thereof |
| CN106938896A (en) * | 2017-03-28 | 2017-07-11 | 中交第航务工程局有限公司 | A kind of cement expansive material and preparation method and application |
| CN106938896B (en) * | 2017-03-28 | 2020-05-15 | 中交第一航务工程局有限公司 | Concrete expanding agent and preparation method and application thereof |
| CN107365097A (en) * | 2017-08-28 | 2017-11-21 | 广东粤盛特种建材有限公司 | A kind of magnesium concrete damage self-repairing additive and preparation method thereof |
| CN109809733A (en) * | 2017-11-20 | 2019-05-28 | 贵州凯襄新材料有限公司 | A kind of cement expansive material and preparation method thereof |
| CN110627405A (en) * | 2019-11-01 | 2019-12-31 | 江苏苏博特新材料股份有限公司 | Expansion material with slower reaction rate and preparation method thereof |
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Application publication date: 20150304 |