CN102584063A - Functional admixture used for early tensioning prestressed structural concrete and purposes of functional admixture - Google Patents
Functional admixture used for early tensioning prestressed structural concrete and purposes of functional admixture Download PDFInfo
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- CN102584063A CN102584063A CN2012100451670A CN201210045167A CN102584063A CN 102584063 A CN102584063 A CN 102584063A CN 2012100451670 A CN2012100451670 A CN 2012100451670A CN 201210045167 A CN201210045167 A CN 201210045167A CN 102584063 A CN102584063 A CN 102584063A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention relates to a functional admixture used for early tensioning prestressed structural concrete. The functional admixture comprises the following materials in percent by weight: 5%-95% of carbonate stone powder and mineral admixture; the carbonate stone powder is obtained by processing carbonate ores through processes such as breaking and fine grinding. A preparation process comprises the following steps of: grinding the carbonate ores into fine powder, and uniformly mixing with other mineral powders according to the proportion to obtain the functional admixture. The prepared functional admixture is applied in preparation of cast-in-situ beam concrete; the concrete capable of meeting fast tensioning requirement can be prepared under the premise without increasing the design strength of the concrete; and the problems that the conventional in-cast-situ beam concrete is long in prestressed age and long in construction period are solved.
Description
Technical field
The present invention relates to a kind of functional type adulterant that is used for early stage stretch-draw prestressing force structural concrete.
Background technology
The major function of high-speed railway bridge is for bullet train provides circuit on smooth-going, the stable bridge, guarantees operation security and ride comfort; Bridge should have enough vertical, horizontal, vertical and torsional strengties, makes the various distortion of structure very little; Avoid structure vehicle bridge resonance or excessive vibration to occur.Because bridge is saved outstanding features such as land resources, the easy control of quality, the design concept of leading the way with bridge has been widely used in the design of high-speed railway and Line for Passenger Transportation.Overhead, long bridge, Longspan Bridge are many, and the bridge ratio is greatly one of characteristic feature of China Express Railway.With the Beijing-Shanghai High-Speed Railway is example, and positive line length is 1318 kilometers completely, and 247 on main track bridge prolongs 1059.351 kilometers, 80.4% of road total length that the line is busy, its raising middle flask beam 31034 holes, 397 of various special constructions.Beijing-Shanghai along the line about 96% simple supported box beam adopts the constructional method that the beam field is prefabricated, the bridge formation frame is established, and other has hole beam surplus the special bridge in 397 places and 1000 to adopt the constructional method of bridge location placing.
Concrete is the most widely used material of construction in human modern age, also is the most large current artificial material.Compare with other material of construction commonly used, the cement concrete production energy consumption is low, and raw material sources are wide, and technology is easy, and production cost is low, characteristics such as durable, fire prevention, suitability are strong, convenient in application that it also has.Thereby; The bridge of worldwide high-speed railway more than 90% all selected concrete structure for use; Along with the development of concrete technology, people recognize that mineral admixture for improving workability of concrete, improves concrete durability; Reduce cement consumption minimizing environmental pollution aspect and have vital role; Mineral admixture has become the indispensable component of high performance concrete, and concrete admixture commonly used comprises flyash, ground slag powder, silicon ash, metakaolin etc., in recent years along with the continuous expansion of construction work scale; The high-quality mineral admixture has faced serious shortage of resources problem, and the adulterant that has specific function simultaneously also also can play an important role for the concrete construction of special construction.
Cast-in-place beam especially adopts the prestressed concrete continuous beam of cast-in-place cantilever method construction, receives the influence of factors such as each cantilever staged construction cycle limit, often becomes the control node in the engineering construction.In order to improve operating efficiency, unit in charge of construction hopes to carry out stretch-draw as early as possible, to guarantee construction speed.Yet; A large amount of prestressed concrete continuous beams (cantilever construction) have been built in the highway in China field in 80～nineties of 20th century; Later stage is to disease problems such as the beam body cracking that exposes in the operation process, span centre downwarps; Domestic scientific research institution and colleges and universities have carried out than systematic study, and modulus of elasticity of concrete is on the low side when showing prestressing, to cause the prestress Creep Loss bigger than normal be the one of the main reasons that causes disease to produce in research.For prestressed concrete structure, the concrete prestressing mainly influences creep of concrete distortion and loss of prestress the length of time; Load-bearing length of time, more early creep of concrete distortion and loss of prestress were big more.How guaranteeing under the prerequisite that later stage creep deformation and beam body splitting resistance meet the demands, through adopting effective measures, through adjustment concrete prestressing length of time be the key issue of needs solution to satisfy that the completion time of project requires.
Summary of the invention
Based on the practical problems that exists in the above engineering construction; The present invention proposes a kind of functional type adulterant that is used for early stage stretch-draw prestressing force structural concrete; And be applied in the concrete preparation of the cast-in-place beam of quick stretch-draw; Creationary with in the carbonate stone flour introducing functional type adulterant, the cast-in-place beam concrete that adopts this functional type adulterant to prepare has the characteristic of high strong, high-elastic mould early and later strength sustained, stable growth.Adopt this functional type adulterant under the prerequisite that does not improve the concrete design strength grade, to prepare the concrete that satisfies quick stretch-draw requirement.This functional type adulterant is applied to the concrete preparation of cast-in-place beam, can effectively solves traditional cast-in-place beam concrete prestressing length in the length of time, long problem of completion time of project.
Technical scheme of the present invention: a kind of functional type adulterant that is used for early stage stretch-draw prestressing force structural concrete is characterized in that: combined by carbonate stone flour and mineral admixture, the proportioning that this functional type adulterant is calculated by weight is:
Carbonate stone flour: 5%-95%;
Mineral powder: 5%-90%.
Above-mentioned a kind of functional type adulterant that is used for early stage stretch-draw prestressing force structural concrete; It is characterized in that: above-mentioned carbonate stone flour is formed through processes such as broken, levigate by carbonated calcium ore, and used carbonated calcium ore comprises rhombspar, calcite etc.
Above-mentioned a kind of functional type adulterant that is used for early stage stretch-draw prestressing force structural concrete is characterized in that: above-mentioned mineral powder mainly is a kind of or mixture more than two kinds among flyash, ground slag, silicon ash, metakaolin, silicon powder, steel-making slag powder, phosphorus slag powder, the lithium ground-slag.
Above-mentioned a kind of preparation method who is used for the functional type adulterant of early stage stretch-draw prestressing force structural concrete; The step that it is characterized in that preparation technology is: earlier the ore reduction of carbonated calcium, grinding are become the carbonate stone flour; In the ratio of prescription the carbonate stone flour is mixed with the mineral powder again; With stirrer it is fully stirred, be uniformly mixed into the functional type adulterant until both.
Above-mentioned a kind of purposes that is used for the functional type adulterant of early stage stretch-draw prestressing force structural concrete is characterized in that being applied to the cast-in-place deck-molding performance concrete of bridge of quick stretch-draw.
The present invention compares the beneficial effect that has with existing conventional art: with carbonate stone flour and the combination of mineral powder; Both can bring into play carbonate stone flour early strength high, play the high advantage of mould in early days; Can bring into play lasting aquation of mineral powder later stage again, the advantage of later strength sustainable growth.Be applied to the preparation of cast-in-place deck-molding performance concrete; Can make the early strength height, play the high concrete of mould in early days; Compare with the concrete of common mineral admixture preparation; Improved early stage Young's modulus, can realize the early stage stretch-draw of cast-in-place beam, for reduce the template turn around time, shorten cast-in-place beam construction period, to practice thrift the engineering construction fund significant.
Admixture high efficiency water reducing agent simultaneously when functional type adulterant of the present invention is applied to concrete so that powder granule fully disperses, gives full play of the filling and the diminishing effect of composite admixture of the present invention.
Functional type adulterant of the present invention has significant filling, diminishing and has the reactive behavior with cement, and the cement of alternative 10%-80% makes high performance concrete.
Functional type adulterant of the present invention as the alternative 10%-80% cement of Additive, makes multi-purpose high performance concrete.As: ballastless track of high-speed railway track board concrete, high-speed railway railway roadbed board concrete, high-speed railway filling bed self-compacting concrete, RPC etc.
Embodiment
The present invention is a kind of purposes that is used for the functional type adulterant of early stage stretch-draw prestressing force structural concrete; It is characterized in that: combined by carbonate stone flour and mineral admixture, the proportioning that this functional type adulterant is calculated by weight is: carbonate stone flour: 5%-95%; Mineral powder: 5%-90%.
Above-mentioned a kind of purposes that is used for the functional type adulterant of early stage stretch-draw prestressing force structural concrete; It is characterized in that: above-mentioned carbonate stone flour is formed through processes such as broken, levigate by carbonated calcium ore, and used carbonated calcium ore comprises rhombspar, calcite etc.
Above-mentioned a kind of purposes that is used for the functional type adulterant of early stage stretch-draw prestressing force structural concrete is characterized in that: above-mentioned mineral powder mainly is a kind of or mixture more than two kinds among flyash, ground slag, silicon ash, metakaolin, silicon powder, steel-making slag powder, phosphorus slag powder, the lithium ground-slag.
Above-mentioned a kind of purposes that is used for the functional type adulterant of early stage stretch-draw prestressing force structural concrete; The step that it is characterized in that preparation technology is: earlier the ore reduction of carbonated calcium, grinding are become the carbonate stone flour; In the ratio of prescription the carbonate stone flour is mixed with the mineral powder again; With stirrer it is fully stirred, be uniformly mixed into the functional type adulterant until both.
Above-mentioned a kind of purposes that is used for the functional type adulterant of early stage stretch-draw prestressing force structural concrete is characterized in that being applied to the cast-in-place deck-molding performance concrete of bridge of quick stretch-draw.
Through embodiment its embodiment is described below:
Embodiment 1
Carbonate stone flour preparation: calcite is broken, be finely ground to the carbonate stone flour.
The proportioning of functional type adulterant is: carbonate stone flour: 70%; Flyash: 10%; Ground slag powder: 20%.
Concrete mix (kg/m
3): cement: 384; Functional type adulterant: 96; Fine aggregate: 750; Coarse aggregate: 1080; Water: 129; Water reducer: 4.8.
Concrete performance: initial slump 220mm, air content 2.4%, 1d ultimate compression strength 34.9MPa; 3d ultimate compression strength 50.8MPa, 28d ultimate compression strength 59.1MPa, 1d Young's modulus 27.1GPa; 3d Young's modulus 37.5GPa, this concrete are used for cast-in-place beam construction, and 3d can satisfy the stretch-draw requirement.
Embodiment 2
Carbonate stone flour preparation: rhombspar is broken, be finely ground to the carbonate stone flour.
The proportioning of functional type adulterant is: carbonate stone flour: 95%; Ground slag powder: 5%.
Concrete mix (kg/m
3): cement: 376; Functional type adulterant: 75; Fine aggregate: 760; Coarse aggregate: 1050; Water: 152; Water reducer: 1.9.
Concrete performance: initial slump 200mm, air content 3.1%, 3d ultimate compression strength 53.6MPa; 5d ultimate compression strength 64.5MPa, 28d ultimate compression strength 74.8MPa, 3d Young's modulus 40.5GPa; 28d Young's modulus 47.2GPa, this concrete are used for cast-in-place beam construction, and 3d can satisfy the stretch-draw requirement.
Embodiment 3
Carbonate stone flour preparation: fragmentations such as mine tailing in the course of processing, aggregate chips that Wingdale is dug up mine, be finely ground to the carbonate stone flour.
The proportioning of functional type adulterant is: the carbonate stone flour: 40%, and silicon ash 20%, flyash: 40%;
Concrete mix (kg/m
3): cement: 488; Functional type adulterant: 166; Fine aggregate: 601; Coarse aggregate: 1116, water: 195.2, water reducer: 5.6;
Concrete performance: initial slump 180mm, air content 3.8%, 3d ultimate compression strength 42.2MPa, 28d ultimate compression strength 57.2MPa, 3d Young's modulus 42.3GPa, this concrete are used for cast-in-place beam construction, and 3d can satisfy the stretch-draw requirement.
Embodiment 4
Carbonate stone flour preparation: calcite is broken, be finely ground to the carbonate stone flour.
The proportioning of functional type adulterant is: carbonate stone flour: 20%; Ground slag powder 50%; Steel-making slag powder: 15%; Metakaolin: 15%.
Concrete mix: cement: 240; Functional type adulterant: 240; Fine aggregate: 754; Coarse aggregate: 1086; Water: 130; Water reducer: 3.2.
Concrete performance: initial slump 210mm, air content 1.8%, 3d ultimate compression strength 55.2MPa, 28d ultimate compression strength 65.2MPa, 3d Young's modulus 38.7GPa, 28d Young's modulus 50.3GPa, this concrete are used for cast-in-place beam construction, and 3d can satisfy the stretch-draw requirement.
Embodiment 5
Carbonate stone flour preparation: calcite is broken, be finely ground to the carbonate stone flour.
The proportioning of functional type adulterant is: carbonate stone flour: 10%; Limestone powder: 40%; Phosphorus slag powder: 35%; Lithium ground-slag: 15%.
Concrete mix: cement: 380; Functional type adulterant: 130; Fine aggregate: 815; Coarse aggregate: 885; Water: 150; Water reducer: 4.5.
Concrete performance: initial slump 190mm, air content 4.0%, 1d ultimate compression strength 46.1MPa; 3d ultimate compression strength 58.0MPa, 28d ultimate compression strength 72.0MPa, 1d Young's modulus 36.2GPa; 3d Young's modulus 40.2GPa, this concrete are used for cast-in-place beam construction, and 3d can satisfy the stretch-draw requirement.
The above-mentioned description to embodiment is can understand and use the present invention for ease of the those of ordinary skill of this technical field.The personnel of skilled obviously can easily make various modifications to these embodiment, and needn't pass through performing creative labour being applied in the General Principle of this explanation among other embodiment.Therefore, the invention is not restricted to the embodiment here, those skilled in the art should be within protection scope of the present invention for improvement and modification that the present invention makes according to announcement of the present invention.
Claims (5)
1. functional type adulterant that is used for early stage stretch-draw prestressing force structural concrete, it is characterized in that: combined by carbonate stone flour and mineral admixture, the proportioning that this functional type adulterant is calculated by weight does
Carbonate stone flour: 5%-95%;
Mineral powder: 5%-90%.
2. by the described a kind of functional type adulterant that is used for early stage stretch-draw prestressing force structural concrete of claim 1; It is characterized in that: above-mentioned carbonate stone flour is formed through processes such as broken, levigate by carbonated calcium ore, and used carbonated calcium ore comprises rhombspar, calcite etc.
3. by the described a kind of functional type adulterant that is used for early stage stretch-draw prestressing force structural concrete of claim 1, it is characterized in that: above-mentioned mineral powder mainly is a kind of or mixture more than two kinds among flyash, ground slag, silicon ash, metakaolin, silicon powder, steel-making slag powder, phosphorus slag powder, the lithium ground-slag.
4. by the described a kind of functional type adulterant that is used for early stage stretch-draw prestressing force structural concrete of claim 1; The step that it is characterized in that preparation technology is: earlier the ore reduction of carbonated calcium, grinding are become the carbonate stone flour; In the ratio of prescription the carbonate stone flour is mixed with the mineral powder again; With stirrer it is fully stirred, be uniformly mixed into the functional type adulterant until both.
5. by the described a kind of functional type adulterant that is used for early stage stretch-draw prestressing force structural concrete of claim 1, it is characterized in that being applied to the cast-in-place deck-molding performance concrete of bridge of quick stretch-draw.
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102923981A (en) * | 2012-11-02 | 2013-02-13 | 云南华电鲁地拉水电有限公司 | Novel concrete admixture and production method |
| CN103588447A (en) * | 2013-11-06 | 2014-02-19 | 衢州职业技术学院 | Superfine mine powder admixture concrete |
| CN103755191A (en) * | 2013-10-29 | 2014-04-30 | 江苏名和集团有限公司 | Mineral admixture with low water demand and preparation method thereof |
| CN103833242A (en) * | 2014-01-17 | 2014-06-04 | 重庆欣材混凝土集团股份有限公司 | Retarding composite limestone powder admixture |
| WO2015007226A1 (en) * | 2013-07-17 | 2015-01-22 | 吉林建筑大学 | Dolomite composite admixture preparation method and novel application |
| CN105036637A (en) * | 2015-07-08 | 2015-11-11 | 宁夏盛远新型建材有限责任公司 | Preparation process and device for compound mineral admixture |
| CN106698991A (en) * | 2016-11-30 | 2017-05-24 | 汤利发 | Concrete admixture and preparation method thereof |
| CN108249829A (en) * | 2017-12-18 | 2018-07-06 | 蚌埠市宝运商品混凝土有限公司 | A kind of environment friendly lightweight concrete material |
| CN108264288A (en) * | 2018-01-18 | 2018-07-10 | 成都建工赛利混凝土有限公司 | Self-compacting concrete and its preparation process |
| CN108383474A (en) * | 2018-03-30 | 2018-08-10 | 李泳鑫 | The concrete for making technique of the compound containing mountain flour |
| CN109180041A (en) * | 2018-09-25 | 2019-01-11 | 沿河土家族自治县乡建商品混凝土有限责任公司 | A method of agstone is prepared using construction waste concrete |
| CN110963726A (en) * | 2019-12-04 | 2020-04-07 | 句容市星辰新型材料有限公司 | Production formula for improving durability of limestone powder |
| CN111298908A (en) * | 2019-12-27 | 2020-06-19 | 江苏融达新材料股份有限公司 | Production process for mixing and grinding steel slag, lithium slag, furnace slag and stone powder |
| CN111960785A (en) * | 2020-08-13 | 2020-11-20 | 中国建筑第八工程局有限公司 | Low-grout concrete |
| CN113087425A (en) * | 2021-04-07 | 2021-07-09 | 万载金泉建材有限公司 | Method for preparing fly ash by using lithium slag and furnace slag |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102173685A (en) * | 2011-02-14 | 2011-09-07 | 中国铁道科学研究院铁道建筑研究所 | Cast-in-place beam concrete composition for quick tensioning |
-
2012
- 2012-02-27 CN CN2012100451670A patent/CN102584063A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102173685A (en) * | 2011-02-14 | 2011-09-07 | 中国铁道科学研究院铁道建筑研究所 | Cast-in-place beam concrete composition for quick tensioning |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102923981A (en) * | 2012-11-02 | 2013-02-13 | 云南华电鲁地拉水电有限公司 | Novel concrete admixture and production method |
| WO2015007226A1 (en) * | 2013-07-17 | 2015-01-22 | 吉林建筑大学 | Dolomite composite admixture preparation method and novel application |
| CN103755191A (en) * | 2013-10-29 | 2014-04-30 | 江苏名和集团有限公司 | Mineral admixture with low water demand and preparation method thereof |
| CN103588447A (en) * | 2013-11-06 | 2014-02-19 | 衢州职业技术学院 | Superfine mine powder admixture concrete |
| CN103588447B (en) * | 2013-11-06 | 2016-01-20 | 衢州职业技术学院 | A kind of Superfine mine powder admixture concrete |
| CN103833242A (en) * | 2014-01-17 | 2014-06-04 | 重庆欣材混凝土集团股份有限公司 | Retarding composite limestone powder admixture |
| CN105036637A (en) * | 2015-07-08 | 2015-11-11 | 宁夏盛远新型建材有限责任公司 | Preparation process and device for compound mineral admixture |
| CN106698991A (en) * | 2016-11-30 | 2017-05-24 | 汤利发 | Concrete admixture and preparation method thereof |
| CN108249829A (en) * | 2017-12-18 | 2018-07-06 | 蚌埠市宝运商品混凝土有限公司 | A kind of environment friendly lightweight concrete material |
| CN108264288A (en) * | 2018-01-18 | 2018-07-10 | 成都建工赛利混凝土有限公司 | Self-compacting concrete and its preparation process |
| CN108264288B (en) * | 2018-01-18 | 2020-10-20 | 成都建工赛利混凝土有限公司 | Self-compacting concrete and preparation process thereof |
| CN108383474A (en) * | 2018-03-30 | 2018-08-10 | 李泳鑫 | The concrete for making technique of the compound containing mountain flour |
| CN109180041A (en) * | 2018-09-25 | 2019-01-11 | 沿河土家族自治县乡建商品混凝土有限责任公司 | A method of agstone is prepared using construction waste concrete |
| CN109180041B (en) * | 2018-09-25 | 2020-12-15 | 沿河土家族自治县乡建商品混凝土有限责任公司 | Method for preparing limestone powder by using waste building concrete |
| CN110963726A (en) * | 2019-12-04 | 2020-04-07 | 句容市星辰新型材料有限公司 | Production formula for improving durability of limestone powder |
| CN111298908A (en) * | 2019-12-27 | 2020-06-19 | 江苏融达新材料股份有限公司 | Production process for mixing and grinding steel slag, lithium slag, furnace slag and stone powder |
| CN111960785A (en) * | 2020-08-13 | 2020-11-20 | 中国建筑第八工程局有限公司 | Low-grout concrete |
| CN113087425A (en) * | 2021-04-07 | 2021-07-09 | 万载金泉建材有限公司 | Method for preparing fly ash by using lithium slag and furnace slag |
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Application publication date: 20120718 |