CN101891426A - Low-creep C60 high-performance concrete - Google Patents
Low-creep C60 high-performance concrete Download PDFInfo
- Publication number
- CN101891426A CN101891426A CN2010102449021A CN201010244902A CN101891426A CN 101891426 A CN101891426 A CN 101891426A CN 2010102449021 A CN2010102449021 A CN 2010102449021A CN 201010244902 A CN201010244902 A CN 201010244902A CN 101891426 A CN101891426 A CN 101891426A
- Authority
- CN
- China
- Prior art keywords
- concrete
- cement
- gelling material
- creep
- low
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- 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 discloses a low-creep C60 high-performance concrete material. Economic and reasonable 42.5 normal portland cement or portland cement is selected, and technologies of mixing grade I fly ash and grade S95 mineral powder, adding a polycarboxylic acid superplasticizer, and the like are adopted, thereby optimizing the proportioning of concrete, ensuring the economy and good placeability and mechanical property of concrete with low water to binder ratio, avoiding concrete cracking caused by low water to binder ratio, ensuring high durability of the concrete, effectively reducing the creep of concrete, reducing the prestressing loss, and ensuring the safety of the concrete structure.
Description
Technical field
The present invention relates to a kind of building concrete material, particularly a kind of low high-performance concrete material of creeping.
Background technology
High performance concrete, is guaranteed performance focus such as weather resistance, workability, suitability, intensity, volume stability and economy at different purposes requirements with the leading indicator of weather resistance as design.For this reason, the characteristics of high performance concrete in configuration are to adopt low water binder ratio, select high-quality raw material for use, and the fine mineral admixture and the efficient additive of necessary admixture sufficient amount.High performance concrete can adapt to modern project to stride greatly, heavy duty, towering direction develops and bears the needs of severe environmental conditions, meets the requirement that modern operating technique adopts suitability for industrialized production (factory's ready mixed concrete, factory-made component).
In the prior art, the problem that the C60 concrete exists has the following aspects:
1. generally to adopt strength grade be 52.5Mpa or high grade silicate cement more to economy aspect C60 concrete, just can reach the requirement of intensity, quality etc., but such cement of high index cost is higher.Generally in order to save cement consumption, also need to mix active mineral admixture now.
2. adopting low water binder ratio is to guarantee concrete intensity, also be the key that improves concrete durability, but low water binder ratio influences concrete workability, mechanical property and endurance quality simultaneously.
3. to prestressed concrete structure, concrete creeping increases loss of prestress greatly, and this is extremely disadvantageous, so the higher strength grade of concrete of prestressed structure general requirement is crept and loss of prestress reducing.
China's high performance concrete development in nearly ten years is very fast, particularly in the heavy constructions in 100 years of durability Design such as engineering over strait, high-speed railway, bring into use, but not popularizing, still is the problem that shoulders heavy responsibilities so the research and extension of high performance concrete is used.
Summary of the invention
Main purpose of the present invention be in the above-mentioned prior art for the problem of the requirement and the existence of high performance concrete, a kind of low-creep C 60 high-performance concrete is provided, select high-quality for use, be suitable for and the starting material of economical rationality; Optimize concrete mix, guarantee low water binder ratio concrete workability and good mechanical performance, the concrete cracking of avoiding low water binder ratio to cause guarantees concrete high-durability; Effectively reduce creep of concrete, reduce loss of prestress, guarantee concrete structure safety.
In order to realize the foregoing invention purpose, the technical solution used in the present invention is as follows:
A kind of low-creep C 60 high-performance concrete, form by gelling material, sand, stone, water and admixture mixing gelling, gelling material comprises that label is 42.5 cement and adulterant, adulterant comprises flyash and breeze, admixture is a high-efficiency water-reducing agent of poly-carboxylic acid, and each raw material consists of in the described concrete:
The total amount of gelling material is 450 kg/m
3～550kg/ m
3, wherein:
Cement is 50%～80% of gelling material gross weight,
Breeze is 10%～20% of a gelling material gross weight,
Flyash is 10%～30% of gelling material gross weight;
Simultaneously:
High-efficiency water-reducing agent of poly-carboxylic acid is 0.95%～1.05% of a gelling material gross weight;
Sand: 624kg/m
3～689kg/m
3
Stone: 1061kg/m
3～1124kg/m
3
Water-cement ratio: 0.28-0.29;
Sand coarse aggregate ratio: 37-39%.
More than each raw material form and be preferably:
The total amount of gelling material is 500kg/ m
3, wherein:
Cement is 70% of gelling material gross weight,
Breeze is 10% of a gelling material gross weight,
Flyash is 20% of gelling material gross weight;
Simultaneously:
High-efficiency water-reducing agent of poly-carboxylic acid is 1% of a gelling material gross weight;
Sand: 661kg/m
3
Stone: 1079kg/m
3
Water-cement ratio: 0.286
Sand coarse aggregate ratio: 38%.
It is 42.5 cement that the present invention uses label, comprises normal silicate 42.5 cement and silicate 42.5 cement (GB 175-1999), avoids using cement of high index, possesses economy.Cooperate to adopt and mix schemes such as flyash and breeze, can reach the requirement of high-strength concrete intensity and quality.
The contriver finds in long term studies and practice: in order to guarantee the high-strength and high-durability of high performance concrete, when the configuration high performance concrete, answer one or more active mineral admixtures of admixture, as flyash, slag, silicon ash etc.The main effect of active mineral admixture in concrete comprises filling effect and active effect.High performance concrete improves concrete density and impermeability by reducing water-cement ratio on the one hand, and fly ash is one of important measures that reduce water consumption, and flyash and ground blast furnace slag have " super folded effect " aspect water-reducing effect; Because little filling effect of mineral admixture more becomes rationally the size distribution in the concrete, concrete is fine and close more on the other hand, and the active effect of mineral admixture makes concrete intensity be guaranteed again.A large amount of research data and engineering practices show, in concrete, mix an amount of flyash, slag, silicon ash isoreactivity mineral admixture in a large number, can improve performances such as concrete impermeability, frost resistance, alkali resistant aggregate reaction ability and anti-harmful ion infiltration greatly.But in the concrete process for preparation, prepare burden many, influence factor is many, in order to find suitable proportioning contriver to carry out a large amount of research, draw the suitable volume that cooperates other each components at last: the suitable volume of breeze is 10%～20%, and preferred volume is 10%; The suitable volume of flyash is 10%～30%, and preferred volume is 20%.
Flyash as concrete adulterant commonly used is meant the dust of collecting from the flue of coal-fired station's coal-powder boiler, according to factors such as fineness, water demand ratios it is divided into I level, II level, III level, standard is seen " flyash that is used for cement and concrete " (GB1596-91).The breeze of making cement admixture refers to pulverizes the powder that obtains with the slag of blast furnace ironmaking, and activity is arranged, and is divided into S75 level, S95 level, S105 level, and standard is seen " GBFS that is used for cement and concrete " (GB/T 18046-2008).The present invention selects I level flyash and S95 level breeze as composite active mineral admixture.
Adopting low water binder ratio is to guarantee concrete intensity, also is the key that improves concrete durability.The used water reducer of the present invention is a high-efficiency water-reducing agent of poly-carboxylic acid, and its solid content is 22%～24%, and water-reducing rate is 28%～32%.
During the higher high-strength concrete of preparation strength grade, should at first select non-bleed type high efficiency water reducing agent for use.High efficiency water reducing agent can be divided into naphthalene system, polycarboxylic acid series, sulfamate system and trimeric cyanamide system at present.The high-efficiency water-reducing agent of poly-carboxylic acid that gelling material such as use of the present invention and cement have better consistency reduces water consumption, has both guaranteed that concrete mix had good workability, improves concrete strength again, and minimizing is shunk and crept.The present invention uses polycarboxylic acid series additive, and cohesiveness is little, and the parcel of slurry and stone is good in the mix, and stone is evenly distributed in slurry, and is not stratified, do not emanate, for liquid.
The consumption S/ of sand coarse aggregate ratio=sand (the consumption S+ stone consumption G of sand) * 100% is a mass ratio.The change of sand coarse aggregate ratio can make the total surface area of aggregate (playing the granular loose material of skeleton or filling effect in concrete) that remarkable change is arranged, thereby the workability of concrete mix is had considerable influence.General determine that the principle of sand coarse aggregate ratio is: guaranteeing under cohesiveness that concrete mix has and the mobile prerequisite the optimum sand coarse aggregate ratio in the timesaving of grout.The contriver draws the suitable sandstone volume that cooperates above gelling material: sand: 624kg/m by practice for many years
3～689kg/m
3, stone: 1061kg/m
3～1124kg/m
3, be preferably sand: 661kg/m
3, stone: 1079kg/m
3Sand coarse aggregate ratio: 37-39% is preferably 38%.
Compared with prior art, the invention has the beneficial effects as follows:
1, the contriver is by adopting ordinary Portland cement+high efficiency water reducing agent+composite active mineral admixture preparation C60 high performance concrete; the starting material of economical rationality have been used; and find breeze and flyash suitable volume and the optimum mix amount in high performance concrete, guarantee concrete economy.
2, the contriver is by adopting high efficiency water reducing agent preparation C60 high performance concrete, concrete workability, mechanical property, endurance quality excellence.
3, contriver's low water binder ratio high performance concrete of mixing the development of flyash and breeze by employing is crept forr a short time than normal concrete, creeps that it is bigger to increase in the 90d after loading, tends towards stability behind 120d.
Embodiment
Below in conjunction with embodiment foregoing invention content of the present invention is described in further detail.
But this should be interpreted as that the scope of the above-mentioned theme of the present invention only limits to following embodiment.Not breaking away under the above-mentioned technological thought situation of the present invention, according to ordinary skill knowledge and customary means, make various replacements and change, all should comprise within the scope of the invention.
Embodiment
Present embodiment is formed according to raw material described in the summary of the invention, prepares 6 experimental group concrete, and each assembly sees Table 1 than data.
Table 1 low-creep C 60 high-performance concrete proportioning
Cement uses China Resources, Guangxi 42.5 ordinary Portland cements in the above-mentioned gelling material, and flyash is Taishan Electric Power Plant I level flyash, and breeze is cement mill, China Resources, a Dongguan S95 ground blast furnace slag.The technical indicator of used cement, flyash and breeze sees Table 2-4.
Admixture: gelling material such as use and cement have JM-PCA (I) high-efficiency water-reducing agent of poly-carboxylic acid of Jiangsu Botexin Materials Co., Ltd's production of better consistency.
The key technical indexes of China Resources, table 2 Guangxi 42.5 cement
The key technical indexes of table 3 Taishan Electric Power Plant I level flyash
The key technical indexes of cement mill, China Resources, table 4 Dongguan S95 level ground blast furnace slag
Estimate concrete operation according to " normal concrete long-term behaviour and durability experiment method " GBJ82-85 and No. [2005] 160, " the railway concrete engineering construction quality is checked and accepted the standard of replenishing " iron construction.
Table 5 is the concrete performance index of each experimental group:
Each proportioning concrete performance index of table 5
The creep index of table 6 for each experimental group is recorded:
Table 6 proportioning creep of concrete index
Above embodiment respectively organizes concrete all can realize the desired starting material economy of construction, concrete workability, mechanical property, endurance quality excellence during low water binder ratio, having reduced and crept, guaranteed concrete structure safety, is concrete performance the best of proportioning shown in 001 the scheme with label.
Claims (6)
1. low-creep C 60 high-performance concrete, formed by gelling material, sand, stone, water and admixture mixing gelling, gelling material comprises that label is 42.5 cement and adulterant, and adulterant comprises flyash and breeze, admixture is a high-efficiency water-reducing agent of poly-carboxylic acid, it is characterized in that:
Each raw material consists of in the described concrete:
The total amount of gelling material is 450 kg/m
3～550kg/ m
3, wherein:
Cement is 50%～80% of gelling material gross weight,
Breeze is 10%～20% of a gelling material gross weight,
Flyash is 10%～30% of gelling material gross weight;
Simultaneously:
High-efficiency water-reducing agent of poly-carboxylic acid is 0.95%～1.05% of a gelling material gross weight;
Sand: 624kg/m
3～689kg/m
3
Stone: 1061kg/m
3～1124kg/m
3
Water-cement ratio: 0.28-0.29;
Sand coarse aggregate ratio: 37-39%.
2. low-creep C 60 high-performance concrete according to claim 1 is characterized in that:
Each raw material consists of in the described concrete:
The total amount of gelling material is 500kg/ m
3, wherein:
Cement is 70% of gelling material gross weight,
Breeze is 10% of a gelling material gross weight,
Flyash is 20% of gelling material gross weight;
Simultaneously:
High-efficiency water-reducing agent of poly-carboxylic acid is 1% of a gelling material gross weight;
Sand: 661kg/m
3
Stone: 1079kg/m
3
Water-cement ratio: 0.286;
Sand coarse aggregate ratio: 38%.
3. low-creep C 60 high-performance concrete according to claim 1 and 2 is characterized in that: described label is that 42.5 cement is normal silicate 42.5 cement or silicate 42.5 cement.
4. low-creep C 60 high-performance concrete according to claim 1 and 2 is characterized in that: described flyash is I level flyash.
5. low-creep C 60 high-performance concrete according to claim 1 and 2 is characterized in that: described breeze is a S95 level breeze.
6. low-creep C 60 high-performance concrete according to claim 1 and 2 is characterized in that: the solid content of described high-efficiency water-reducing agent of poly-carboxylic acid is 22%～24%, and water-reducing rate is 28%～32%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102449021A CN101891426A (en) | 2010-08-04 | 2010-08-04 | Low-creep C60 high-performance concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102449021A CN101891426A (en) | 2010-08-04 | 2010-08-04 | Low-creep C60 high-performance concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101891426A true CN101891426A (en) | 2010-11-24 |
Family
ID=43100806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102449021A Pending CN101891426A (en) | 2010-08-04 | 2010-08-04 | Low-creep C60 high-performance concrete |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101891426A (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102351476A (en) * | 2010-07-13 | 2012-02-15 | 吴日成 | Cement-based flexible sectional material and its manufacture method |
| CN102659363A (en) * | 2012-04-28 | 2012-09-12 | 江苏名和集团有限公司 | Light high-strength concrete and preparation method thereof |
| CN102701654A (en) * | 2012-06-20 | 2012-10-03 | 东南大学 | Low-creep concrete |
| CN102898089A (en) * | 2012-11-16 | 2013-01-30 | 上海市建筑构件制品有限公司 | Oil-proof concrete |
| CN103011727A (en) * | 2012-12-25 | 2013-04-03 | 张庆彬 | Low creep concrete |
| CN103708781A (en) * | 2013-12-20 | 2014-04-09 | 亚泰集团沈阳建材有限公司 | Low-chloride ion high-performance concrete |
| CN103922680A (en) * | 2014-03-22 | 2014-07-16 | 中国二十二冶集团有限公司 | Method for preparing green high-performance concrete by large doping amount mineral admixture |
| CN105060820A (en) * | 2015-08-08 | 2015-11-18 | 常州大学 | Preparation of economical C60 high-strength concrete |
| CN105461274A (en) * | 2015-11-24 | 2016-04-06 | 绍兴文理学院 | Low-creep concrete |
| CN107721319A (en) * | 2017-11-17 | 2018-02-23 | 天津海得润滋建材有限公司 | Strong concrete mix |
| CN107902991A (en) * | 2017-11-17 | 2018-04-13 | 天津海得润滋建材有限公司 | High performance concrete mixture |
| CN108439830A (en) * | 2018-05-10 | 2018-08-24 | 宁夏新华轩高新技术有限公司 | A kind of composite gelled material, concrete and mortar |
| CN109437749A (en) * | 2018-12-06 | 2019-03-08 | 云南建投绿色高性能混凝土股份有限公司 | C60 concrete and its mixing proportion design method based on package coarse aggregate mortar thickness |
| CN106396533B (en) * | 2016-08-12 | 2019-04-23 | 绍兴文理学院 | A kind of low concrete of creeping prepared using concrete mixing plant waste pulp |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1498872A (en) * | 2002-11-08 | 2004-05-26 | 上海浦莲预拌混凝土公司 | Envionmental protection typed high performance premixed concrete and preparation method |
| CN101412607A (en) * | 2007-10-19 | 2009-04-22 | 上海建工材料工程有限公司 | High flowing anticracking concrete with ultralong structure |
-
2010
- 2010-08-04 CN CN2010102449021A patent/CN101891426A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1498872A (en) * | 2002-11-08 | 2004-05-26 | 上海浦莲预拌混凝土公司 | Envionmental protection typed high performance premixed concrete and preparation method |
| CN101412607A (en) * | 2007-10-19 | 2009-04-22 | 上海建工材料工程有限公司 | High flowing anticracking concrete with ultralong structure |
Non-Patent Citations (1)
| Title |
|---|
| 《硕士学位论文电子期刊》 20100515 赵金辉 C60高性能混凝土徐变性能研究 47-58 1-5 , 第5期 * |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102351476A (en) * | 2010-07-13 | 2012-02-15 | 吴日成 | Cement-based flexible sectional material and its manufacture method |
| CN102659363A (en) * | 2012-04-28 | 2012-09-12 | 江苏名和集团有限公司 | Light high-strength concrete and preparation method thereof |
| CN102701654A (en) * | 2012-06-20 | 2012-10-03 | 东南大学 | Low-creep concrete |
| CN102898089A (en) * | 2012-11-16 | 2013-01-30 | 上海市建筑构件制品有限公司 | Oil-proof concrete |
| CN103011727A (en) * | 2012-12-25 | 2013-04-03 | 张庆彬 | Low creep concrete |
| CN103011727B (en) * | 2012-12-25 | 2015-02-04 | 江苏金贸建设集团有限公司 | Low creep concrete |
| CN103708781A (en) * | 2013-12-20 | 2014-04-09 | 亚泰集团沈阳建材有限公司 | Low-chloride ion high-performance concrete |
| CN103922680A (en) * | 2014-03-22 | 2014-07-16 | 中国二十二冶集团有限公司 | Method for preparing green high-performance concrete by large doping amount mineral admixture |
| CN105060820A (en) * | 2015-08-08 | 2015-11-18 | 常州大学 | Preparation of economical C60 high-strength concrete |
| CN105461274A (en) * | 2015-11-24 | 2016-04-06 | 绍兴文理学院 | Low-creep concrete |
| CN106396533B (en) * | 2016-08-12 | 2019-04-23 | 绍兴文理学院 | A kind of low concrete of creeping prepared using concrete mixing plant waste pulp |
| CN107721319A (en) * | 2017-11-17 | 2018-02-23 | 天津海得润滋建材有限公司 | Strong concrete mix |
| CN107902991A (en) * | 2017-11-17 | 2018-04-13 | 天津海得润滋建材有限公司 | High performance concrete mixture |
| CN108439830A (en) * | 2018-05-10 | 2018-08-24 | 宁夏新华轩高新技术有限公司 | A kind of composite gelled material, concrete and mortar |
| CN109437749A (en) * | 2018-12-06 | 2019-03-08 | 云南建投绿色高性能混凝土股份有限公司 | C60 concrete and its mixing proportion design method based on package coarse aggregate mortar thickness |
| CN109437749B (en) * | 2018-12-06 | 2021-07-06 | 云南建投绿色高性能混凝土股份有限公司 | C60 concrete based on thickness of coated coarse aggregate mortar and mix proportion design method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101891426A (en) | Low-creep C60 high-performance concrete | |
| CN102992722B (en) | Ultrahigh-strength grouting material based on iron tailing sand and cement and preparation method of grouting material | |
| CN102850011B (en) | Technological process for preparing active powder concrete by using iron tailing | |
| CN1323049C (en) | Machine-made sand self-compacting concrete | |
| CN104402345B (en) | A kind of big micro-swollen high-strength grout of fluidised form | |
| CN112960952B (en) | High-crack-resistance light-weight high-strength self-compacting concrete and preparation method thereof | |
| CN103936369B (en) | C30 level simple grain level regeneration self-compacting concrete and preparation method thereof | |
| CN102659373B (en) | High-performance corrosion-resisting concrete pile and preparation method thereof | |
| CN102199025B (en) | Structure reinforcing material taking steel slag as aggregate | |
| CN103288398A (en) | High-performance machine-made sand marine concrete and preparation method thereof | |
| CN101475353B (en) | Concrete for unballasted track plate | |
| CN103332892A (en) | Industrial waste residue dry-mixed mortar | |
| CN103011637A (en) | Bare concrete binding material and corrosion-resistant bare concrete utilizing same | |
| CN103011727B (en) | Low creep concrete | |
| CN102976694B (en) | Anti-corrosion concrete | |
| CN102329096A (en) | High-early-strength mineral additive for concrete | |
| CN102320794A (en) | High-strength concrete prepared by sea sand | |
| CN107032695B (en) | Steel fiber self-compacting concrete, preparation method thereof and prefabricated part | |
| CN102815910A (en) | Cement glue with adjustable performances | |
| CN102838323A (en) | High-performance concrete gel material for tunnel and application thereof | |
| CN103396060B (en) | Concrete mixture for mass concrete construction | |
| CN116023098A (en) | Low-carbon high-durability concrete | |
| CN102775110A (en) | Cementing material with strength grade of above 200MPa and preparation method thereof | |
| CN113372079A (en) | High-wear-resistance gypsum-based self-leveling mortar and preparation method thereof | |
| CN110498630B (en) | Concrete composite additive, preparation method thereof and concrete |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20101124 |