CN103086668A - Design method for mixing ratio of C60-grade pumping self-compacting steel tube recycled concrete - Google Patents
Design method for mixing ratio of C60-grade pumping self-compacting steel tube recycled concrete Download PDFInfo
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- CN103086668A CN103086668A CN2013100288194A CN201310028819A CN103086668A CN 103086668 A CN103086668 A CN 103086668A CN 2013100288194 A CN2013100288194 A CN 2013100288194A CN 201310028819 A CN201310028819 A CN 201310028819A CN 103086668 A CN103086668 A CN 103086668A
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- 239000004567 concrete Substances 0.000 title claims abstract description 81
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 48
- 239000010959 steel Substances 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000005086 pumping Methods 0.000 title claims abstract description 29
- 238000013461 design Methods 0.000 title claims abstract description 24
- 238000002156 mixing Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000010881 fly ash Substances 0.000 claims abstract description 12
- 239000004568 cement Substances 0.000 claims abstract description 11
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 11
- 230000008929 regeneration Effects 0.000 claims description 35
- 238000011069 regeneration method Methods 0.000 claims description 35
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 9
- 239000002956 ash Substances 0.000 claims description 9
- 239000004576 sand Substances 0.000 claims description 9
- 229910052710 silicon Inorganic materials 0.000 claims description 9
- 239000010703 silicon Substances 0.000 claims description 9
- 239000011230 binding agent Substances 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 230000000979 retarding effect Effects 0.000 claims description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 2
- 239000011707 mineral Substances 0.000 claims description 2
- 239000000049 pigment Substances 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 239000002002 slurry Substances 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000011161 development Methods 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 5
- 238000002360 preparation method Methods 0.000 abstract description 3
- 238000005056 compaction Methods 0.000 abstract 2
- 239000012615 aggregate Substances 0.000 abstract 1
- 230000001737 promoting effect Effects 0.000 abstract 1
- 229910021487 silica fume Inorganic materials 0.000 abstract 1
- 239000002699 waste material Substances 0.000 description 10
- 239000002131 composite material Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000005266 casting Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003469 silicate cement Substances 0.000 description 2
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 230000000192 social effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Classifications
-
- 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 belongs to the technical field of concrete preparation of civil engineering, and relates to a design method of a C60-grade pumping self-compacting steel tube recycled concrete mix proportion. The technical problem of preparation of application of recycled concrete in concrete filled steel tubes is solved, and a C60-grade pumping self-compaction concrete filled steel tube mixing proportion design method is provided. The technical scheme of the mix proportion design method is as follows: cement, primary coarse aggregate, regenerated coarse aggregate, fine aggregate, water, flyash, silica fume and high performance water reducing agent in Kg/m3,: (320-450): (616-704): (176-264): (750-850): (150-165): (80-120): (20-40): (7-10). The method has the advantages that the method can provide a C60-grade pumping self-compaction recycled concrete mix proportion design method for a steel tube recycled concrete structure, and has important theoretical, social and practical values for promoting the reasonable and wide application of the recycled concrete and the steel tube recycled concrete structure and the sustainable development of building-resource-environment.
Description
Technical field
The invention belongs to the concrete technology field of civil engineering work, particularly a kind of C60 level pumping self-compacting steel tube regeneration concrete mixing proportion design method.
Background technology
Concrete filled steel tube is as a kind of combined member, utilize steel pipe and the interaction of concrete bi-material in loading process, can give full play to the large and good advantage of concrete compression performance of steel tensile strength, made up simultaneously bi-material shortcoming separately, this is the advantage place of steel tube-concrete composite structure.Its ultimate principle is specially: 1. utilize the supporting role of concrete filled, strengthen the geometrical stability of steel pipe walls, change the unstable failure pattern of empty steel pipe, avoiding or to delay steel pipe generation cripling, thereby guarantee giving full play to of tube material performance.2. utilize steel pipe to the effect of contraction of core concrete, make core concrete be in the three-dimensional compressive stress state, the rigidity that the pipe inner concrete forms is restrained effect, thereby improve concrete ultimate compression strength and deformability, its plasticity and toughness are greatly improved, and have prevented the brittle rupture of steel pipe inner concrete.In addition, in the construction process of concrete filled steel tube, steel pipe can also be as building the template of core concrete, so easy construction and can reduce executive cost.
At present, be accompanied by country and society the protection of resources and environment consciousness is strengthened gradually, how how saving resource and the energy realize the recycling of discarded concrete rationally and effectively, are country and even the each province and city development in science and technology most important thing.China's building waste annual emissions is more than 6,000,000,000 ton, be the world maximum country of discharging, and the main moiety of buildings rubbish is discarded concrete, accounts for 30%～40%.Therefore, how science is processed with utilizing discarded concrete is current key problem of confronting and main task, has become domestic and international concern and problem demanding prompt solution.
The provinces and cities such as Shanghai, Qingdao, Shenzhen have all set up building waste treatment plant, and the building waste factory of the environment-friendly building materials company of first Taida that is positioned at Changping District Yang Fang town that especially is distributed in one of four building waste treatment plants of Beijing surrounding in planning has come into operation in 2011 and produced the concrete regenerating coarse-fine aggregate.In addition, in 2011, country, place, industry and Beijing promulgated " regeneration concrete or regeneration coarse-fine aggregate utilisation technology rules and standard " in succession.In addition, various mechanical properties, serviceability and the weather resistance etc. of regeneration concrete are by adding flyash, silicon ash and high-performance water reducing agent etc. to improve.The above-mentioned regeneration concrete that is is applied to the concretefilled steel tube system and has created various favourable conditions.
Want fundamentally to solve the problem of China and even the existence of each province and city building waste; one of approach is to take material of construction to recycle pattern; change traditional linear disposal options; walk the road of regeneration; reduce buildings to the degree of dependence of natural resources; really realize the whole resource utilizations of building waste, strive for larger economic interests and social benefit in protection of the environment, and this architecture structure form of steel tube regeneration concrete exactly provides an effective approach for the discarded concrete resource utilization.Concrete filled steel tube is as a kind of combined member, can give full play to the large and good advantage of concrete compression performance of steel tensile strength, made up simultaneously bi-material shortcoming separately, and more be conducive to use regeneration concrete, can be widely used in the engineering fields such as building, bridge, subway station.
At present, about the steel tube-concrete composite structure construction, namely its core concrete is built and generally adopt the pumping, jacking casting method both at home and abroad, this kind casting method can guarantee that its core concrete has the good Performance and quality of building.Also consider simultaneously the unsuitable and too high concrete of more difficult preparation strength of regeneration concrete, and the concrete filled steel tube engineering structure generally adopts the C60 strength grade at present, therefore research emphasis and the direction of C60 level pumping self-compacting steel tube regeneration concrete mixing proportion design method as patent of the present invention.
Therefore, by systematically providing " C60 pumping self-compacting steel tube regeneration concrete mixing proportion design method ", can accelerate regeneration concrete and extensively, reasonably be applied in engineering structure, fundamentally solve the problem that country and even each province and city building waste exist; Not only can promote to establish and improve the building waste joint disposal system that is fit to country and even each province and city practical situation, also promote national scientific-technical progress, economic construction, environment and social development simultaneously.Therefore, imperative and economy and society is significant.
Summary of the invention
The objective of the invention is to overcome existing deficiency about steel tube regeneration Concrete technology, especially for the deficiency that is High strength pumping self-compacting steel tube regeneration Concrete technology, provide a kind of C60 level pumping self-compacting regeneration concrete for the steel tube regeneration concrete combined structure.This kind regeneration concrete can satisfy builds the required pumping self-compacting ability of concrete filled steel tube, need not to vibrate, and intensity can reach the C60 grade, is suitable for, the post of Special complex structure important as high level or high-rise building engineering, large span elevated bridge engineering, metro station tunnel engineering etc. and the steel tube-concrete composite structure of bracing member.
The present invention addresses the above problem the technical scheme that adopts to be:
This mix proportion is:
Cement: primary coarse aggregate: recycled coarse aggregate: fine aggregate: water: flyash: the silicon ash: high-performance water reducing agent is: (unit: Kg/m
3): (320～450): (616～704): (176～264): (750～850): (150～165): (80～120): (20～40): (7～10).
Described recycled coarse aggregate is the I level, and best replacement rate is 20～30%, is continuous grading, and particle diameter is Ф 5～20mm, and recycled coarse aggregate should adopt pre-wet treatment, otherwise calculates its additional water consumption according to the recycled coarse aggregate water-intake rate.
Described steel pipe is Q345 or Q390 or Q420, and maximum diameter of aggrogate is not more than 1 with the ratio of pumping caliber: (3～5).
Described mineral admixture refers to I or II level flyash and high quality silicon ash, the volume of flyash is 15～30%, the volume of silicon ash is 5～10%, cement should preferentially be selected PI52.5,42.5, select and then PO52.5,42.5, when cement employing PO type, wherein the volume of I level flyash should be got the lower value near above-mentioned scope, and its cement specific surface area used is preferably 335～365m
2Between/kg, binder total amount should not surpass 560kg/m
3And should not be less than 470kg/m
3
Described concrete fine aggregate all adopts natural river sand, is medium sand, and sand coarse aggregate ratio is 42～48%, and the concrete coarse aggregate volume should not be greater than 950kg/m
3
Described water-binder ratio is 0.28～0.32, should use the absolute volume method to carry out mix-design, and unit volume coarse aggregate amount is preferably 0.27～0.34m
3, unit volume fine aggregate amount is preferably 0.43～0.46m
3, the pigment volume ratio is preferably 0.75～1.10, and unit volume powder volume is preferably 0.18～0.25m
3, unit volume slurry amount is preferably 0.34～0.42m
3
Described high-performance water reducing agent is the polycarboxylic acid series high efficiency water reducing agent with pumping agent performance, retarding performance, bleed performance, and water-reducing rate must be greater than 25%, and has certain guarantor and mould function, and its volume should be between 1～2%.
Beneficial effect of the present invention is:
1. the regeneration concrete of the present invention's production is a kind of pumping self-compacting ability of steel tube regeneration concrete combined structure, mixture ratio design of recycled aggregate concrete method that need not to vibrate of being applicable to, and intensity can reach the C60 grade, be beneficial to very much this modernization casting craft of pumping self-compacting, especially for steel tube-concrete composite structure, this performance of building is particularly important.That this kind regeneration concrete can be suitable for is important as high level or high-rise building engineering, large span elevated bridge engineering, metro station tunnel engineering etc., the post of Special complex structure and the steel tube-concrete composite structure of bracing member.
2. be conducive to promote regeneration concrete and steel tube regeneration concrete combined structure rationally, use widely and build-resource-development of continuity of environment ground, fundamentally solve the problem that China's building waste exists; Also can promote simultaneously to establish and improve the building waste joint disposal system that is fit to China's practical situation, also promote in addition scientific-technical progress, economic construction, environment and the social development of China, all have important theory significance and practical value.Therefore, imperative and economy, environment and social effect are great.
Embodiment
The invention provides a kind of C60 level pumping self-compacting steel tube regeneration concrete mixing proportion design method, the invention will be further described below by embodiment.In, the most common applicable situation the most economic in line with the regeneration concrete composition material, carry out following proportioning method design.
Embodiment:
Cement: be the PI42.5 silicate cement of certain cement mill production.
Sand: river sand, medium sand.
Stone: primary coarse aggregate is natural rubble, regenerated coarse aggregate is to carry out the processing such as secondary breaking and screening with jaw crusher by the discarded concrete that the building iron concrete produces to obtain, and recycled coarse aggregate has adopted pre-wet treatment, and it is placed to the configuration of using it for again regeneration concrete after the saturation plane drying, particle diameter is 5～20mm, continuous grading meets every regulation of national regulation " GBT25177-2010 the reinforcement of concrete regenerated coarse aggregate " simultaneously.
Water: tap water.
Flyash: the I level flyash that certain power plant produces.
Silicon ash: the high quality silicon ash of producing for certain ferro-silicon factory.
High-performance water reducing agent: the high-performance polycarboxylic acids water reducing agent that certain admixture factory produces, the pumping agent function is arranged, be efficient retarding and water reducing agent, water-reducing rate is greater than 25%, and better with above-mentioned PI42.5 silicate cement consistency.
A kind of C60 level pumping self-compacting steel tube regeneration concrete mixing proportion design method is as follows:
Claims (7)
1. C60 level pumping self-compacting steel tube regeneration concrete mixing proportion design method, described mix-design be cast in steel pipe, have the pumping self-compacting ability, need not to vibrate, regeneration concrete method of design that strength grade is C60, it is characterized in that, this concrete is according to component unit K g/m
3Proportioning be: cement: primary coarse aggregate: recycled coarse aggregate: fine aggregate: water: flyash: silicon ash: high-performance water reducing agent=(320～450): (616～704): (176～264): (750～850): (150～165): (80～120): (20～40): (7～10).
2. C60 level pumping self-compacting steel tube regeneration concrete mixing proportion design method according to claim 1, it is characterized in that, described recycled coarse aggregate is the I level, best replacement rate is 20～30%, be continuous grading, particle diameter is Ф 5～20mm, and recycled coarse aggregate should adopt pre-wet treatment, otherwise calculates its additional water consumption according to the recycled coarse aggregate water-intake rate.
3. C60 level pumping self-compacting steel tube regeneration concrete mixing proportion design method according to claim 1, is characterized in that, described steel pipe is Q345 or Q390 or Q420, and maximum diameter of aggrogate is not more than 1 with the ratio of pumping caliber: (3～5).
4. C60 level pumping self-compacting steel tube regeneration concrete mixing proportion design method according to claim 1, it is characterized in that, described mineral admixture refers to I or II level flyash and high quality silicon ash, the volume of flyash is 15～30%, the volume of silicon ash is 5～10%, cement should preferentially be selected PI52.5,42.5, select and then PO52.5,42.5, when cement adopts the PO type, wherein the volume of I level flyash should be got the lower value near above-mentioned scope, and its cement specific surface area used is preferably 335～365m
2Between/kg, binder total amount should not surpass 560kg/m
3And should not be less than 470kg/m
3
5. C60 level pumping self-compacting steel tube regeneration concrete mixing proportion design method according to claim 1, it is characterized in that, described concrete fine aggregate all adopts natural river sand, is medium sand, sand coarse aggregate ratio is 42～48%, and the concrete coarse aggregate volume should not be greater than 950kg/m
3
6. C60 level pumping self-compacting steel tube regeneration concrete mixing proportion design method according to claim 1, it is characterized in that, described water-binder ratio is 0.28～0.32, should use the absolute volume method to carry out mix-design, and unit volume coarse aggregate amount is preferably 0.27～0.34m
3, unit volume fine aggregate amount is preferably 0.43～0.46m
3, the pigment volume ratio is preferably 0.75～1.10, and unit volume powder volume is preferably 0.18～0.25m
3, unit volume slurry amount is preferably 0.34～0.42m
3
7. C60 level pumping self-compacting steel tube regeneration concrete mixing proportion design method according to claim 1, it is characterized in that, described high-performance water reducing agent is the polycarboxylic acid series high efficiency water reducing agent with pumping agent performance, retarding performance, bleed performance, water-reducing rate must be greater than 25%, and have certain guarantor and mould function, its volume should be between 1～2%.
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| CN201310028819.4A CN103086668B (en) | 2013-01-15 | 2013-01-15 | Design method for mixing ratio of C60-grade pumping self-compacting steel tube recycled concrete |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103334542A (en) * | 2013-07-17 | 2013-10-02 | 江苏永泰建造工程有限公司 | Steel pipe-contained recycled concrete column and implementation method thereof |
| CN104278622A (en) * | 2014-10-20 | 2015-01-14 | 广西交通科学研究院 | Recycled-concrete cross steel-pipe special-shaped column pier |
| CN104278621A (en) * | 2014-10-20 | 2015-01-14 | 广西交通科学研究院 | Splice mounting type recycled concrete-filled steel tube Y-shaped bridge pier |
| CN104318069A (en) * | 2014-09-30 | 2015-01-28 | 郑州大学 | Method for determining recycled aggregate and concrete proportioning ratio |
| CN104478325A (en) * | 2014-11-28 | 2015-04-01 | 沈阳大学 | C90-grade self-compaction high-strength concrete and preparation method thereof |
| CN104591656A (en) * | 2015-02-13 | 2015-05-06 | 福建江夏学院 | Low-drying shrinkage high-performance recycled concrete |
| CN105753400A (en) * | 2016-01-22 | 2016-07-13 | 北方工业大学 | High-temperature-burst-resistant self-compacting concrete, preparation method thereof and steel tube concrete |
| CN105819779A (en) * | 2016-03-23 | 2016-08-03 | 沈阳大学 | Grade-C60 high-strength recycled concrete and preparation method thereof |
| CN106565162A (en) * | 2016-09-30 | 2017-04-19 | 郑州大学 | Method for determining steel fiber regenerative coarse aggregate concrete mix proportion |
| CN107324713A (en) * | 2017-05-06 | 2017-11-07 | 武汉理工大学 | A kind of self-compaction concrete filled steel tube and preparation method thereof |
| CN107777961A (en) * | 2016-08-31 | 2018-03-09 | 北京市第五建筑工程集团有限公司 | It is easy to the High-strength self-compaction concrete of super high-rise pumping |
| CN107879691A (en) * | 2017-05-09 | 2018-04-06 | 广西交通科学研究院有限公司 | The mass concrete of C30/C40 rank Comprehensive Control heat of hydration temperature rises |
| CN108059408A (en) * | 2017-12-22 | 2018-05-22 | 中建八局第建设有限公司 | A kind of high intensity self-compacting concrete and preparation method thereof |
| CN108229005A (en) * | 2017-12-29 | 2018-06-29 | 上海建工集团股份有限公司 | A kind of regeneration concrete of more than strength grade C50 and preparation method thereof |
| CN109761550A (en) * | 2019-03-15 | 2019-05-17 | 江苏中联铸本混凝土有限公司 | The formula of C60 self-compacting concrete and application |
| CN116217152A (en) * | 2022-10-09 | 2023-06-06 | 中建八局第二建设有限公司 | Formula and preparation method of C60 strength grade steel fiber recycled concrete |
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Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103334542A (en) * | 2013-07-17 | 2013-10-02 | 江苏永泰建造工程有限公司 | Steel pipe-contained recycled concrete column and implementation method thereof |
| CN104318069A (en) * | 2014-09-30 | 2015-01-28 | 郑州大学 | Method for determining recycled aggregate and concrete proportioning ratio |
| CN104278622A (en) * | 2014-10-20 | 2015-01-14 | 广西交通科学研究院 | Recycled-concrete cross steel-pipe special-shaped column pier |
| CN104278621A (en) * | 2014-10-20 | 2015-01-14 | 广西交通科学研究院 | Splice mounting type recycled concrete-filled steel tube Y-shaped bridge pier |
| CN104478325A (en) * | 2014-11-28 | 2015-04-01 | 沈阳大学 | C90-grade self-compaction high-strength concrete and preparation method thereof |
| CN104591656A (en) * | 2015-02-13 | 2015-05-06 | 福建江夏学院 | Low-drying shrinkage high-performance recycled concrete |
| CN105753400A (en) * | 2016-01-22 | 2016-07-13 | 北方工业大学 | High-temperature-burst-resistant self-compacting concrete, preparation method thereof and steel tube concrete |
| CN105819779A (en) * | 2016-03-23 | 2016-08-03 | 沈阳大学 | Grade-C60 high-strength recycled concrete and preparation method thereof |
| CN107777961A (en) * | 2016-08-31 | 2018-03-09 | 北京市第五建筑工程集团有限公司 | It is easy to the High-strength self-compaction concrete of super high-rise pumping |
| CN107777961B (en) * | 2016-08-31 | 2020-07-03 | 北京市第五建筑工程集团有限公司 | High-strength self-compacting concrete easy for super high-rise pumping |
| CN106565162A (en) * | 2016-09-30 | 2017-04-19 | 郑州大学 | Method for determining steel fiber regenerative coarse aggregate concrete mix proportion |
| CN106565162B (en) * | 2016-09-30 | 2018-08-28 | 郑州大学 | Steel fibre regenerated coarse aggregate concrete mix determines method |
| CN107324713B (en) * | 2017-05-06 | 2019-11-26 | 武汉理工大学 | A kind of self-compaction concrete filled steel tube and preparation method thereof |
| CN107324713A (en) * | 2017-05-06 | 2017-11-07 | 武汉理工大学 | A kind of self-compaction concrete filled steel tube and preparation method thereof |
| CN107879691A (en) * | 2017-05-09 | 2018-04-06 | 广西交通科学研究院有限公司 | The mass concrete of C30/C40 rank Comprehensive Control heat of hydration temperature rises |
| CN107879691B (en) * | 2017-05-09 | 2020-12-25 | 广西交通科学研究院有限公司 | Large-volume concrete with hydration heat temperature comprehensively controlled at C30/C40 level |
| CN108059408A (en) * | 2017-12-22 | 2018-05-22 | 中建八局第建设有限公司 | A kind of high intensity self-compacting concrete and preparation method thereof |
| CN108229005A (en) * | 2017-12-29 | 2018-06-29 | 上海建工集团股份有限公司 | A kind of regeneration concrete of more than strength grade C50 and preparation method thereof |
| CN108229005B (en) * | 2017-12-29 | 2022-01-11 | 上海建工集团股份有限公司 | Recycled concrete with strength grade of more than C50 and preparation method thereof |
| CN109761550A (en) * | 2019-03-15 | 2019-05-17 | 江苏中联铸本混凝土有限公司 | The formula of C60 self-compacting concrete and application |
| CN109761550B (en) * | 2019-03-15 | 2021-05-11 | 江苏中联铸本混凝土有限公司 | C60 self-compaction concrete slump survey system |
| CN116217152A (en) * | 2022-10-09 | 2023-06-06 | 中建八局第二建设有限公司 | Formula and preparation method of C60 strength grade steel fiber recycled concrete |
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| Publication number | Publication date |
|---|---|
| CN103086668B (en) | 2016-05-18 |
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