CN106145809A - A kind of C70 high-strength concrete and preparation method thereof - Google Patents

A kind of C70 high-strength concrete and preparation method thereof Download PDF

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Publication number
CN106145809A
CN106145809A CN201510159956.0A CN201510159956A CN106145809A CN 106145809 A CN106145809 A CN 106145809A CN 201510159956 A CN201510159956 A CN 201510159956A CN 106145809 A CN106145809 A CN 106145809A
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water
concrete
strength concrete
strength
cement
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CN201510159956.0A
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程爱民
喻进宗
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MCC5 Group Shanghai Corp Ltd
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MCC5 Group Shanghai Corp Ltd
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Priority to CN201510159956.0A priority Critical patent/CN106145809A/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

Abstract

A kind of C70 high-strength concrete, it is characterised in that the mass percent of each component is: cement 15.2~17.3%, sand 25~30%, stone 38~45%, flyash 4~5%, slag powders 3.5~5.0%, efficient retarding and water reducing agent 0.3~0.4%, water 6~6.5%.C70 high-strength concrete of the present invention and preparation method thereof has the high-strength concrete pumping being suitable for high-rise building Core Walls Structure, meet the requirement of the pump concrete slump 220 ± 30mm, there is good mobility and concrete strength meets design requirement, the advantage of economical rationality.

Description

A kind of C70 high-strength concrete and preparation method thereof
Technical field
The present invention relates to a kind of concrete, specifically, be a kind of C70 high-strength concrete and preparation method thereof.
Background technology
It is the concrete of C70 for reinforced concrete composite structure strength grade that Chinese patent CN101195530 B discloses a kind of on November 24th, 2010, and wherein the match ratio of concrete is according to cement: coarse aggregate: fine aggregate: water: polycarboxylic acid series high efficiency water reducing agent: silicon ash: flyash= 400: 576: 1224: 148: 8: 30: 120 preparations, component unit is: Kg/m3.Although the concrete combined structure strength grade of this invention is C70, but, this slump for the concrete that reinforced concrete composite structure strength grade is C70 is only 140mm.It is known that concrete slump determines according to pumping and non-pumping, non-pumping is typically at 50-80mm, and pumping is general at 120 ± 30mm, and super high-rise pumping is typically at 180mm.Concrete slump is the biggest, and its free water is many more, is more easily generated isolation.Therefore, though the pumping that can be used in concrete for the concrete that reinforced concrete composite structure strength grade is C70 of this invention, it can not meet the requirement of high-rise building engineering concrete pumping.It addition, the material usage of Super High xoncrete structure, building or the deadweight of structures, its rigidity of structure can be because producing lateral displacement under the compression of high-story house and horizontal loading.
The pumping of concrete in high-rise building engineering of the most known C70 high-strength concrete also exists above-mentioned all inconvenience and problem.
Summary of the invention
The purpose of the present invention, is that proposing a kind of high-rise building engineering that is applicable to pumps, has the C70 high-strength concrete of relatively high fluidity.
It is another object of the present invention to propose a kind of high-rise building engineering that is applicable to and pump, have the preparation method of the C70 high-strength concrete of relatively high fluidity.
For achieving the above object, the technical solution of the present invention is:
A kind of C70 high-strength concrete, it is characterised in that the mass percent of each component is:
Cement 15.2~17.3%
Sand 25~30%
Stone 38~45%
Flyash 4~5%
Slag powders 3.5~5.0%
Efficient retarding and water reducing agent 0.3~0.4%
Water 6~6.5%.
The C70 high-strength concrete of the present invention can also be further achieved by the following technical measures.
Aforesaid C70 high-strength concrete, wherein said cement is P. II 52.5 portland cement, 3d rupture strength 6.0Mpa, comprcssive strength 29.9Mpa, and initial set must not be early than 45 minutes, and final set must not be later than 390 minutes.
Aforesaid C70 high-strength concrete, wherein said sand is river sand, clay content≤2%, modulus of fineness 2.6.
Aforesaid C70 high-strength concrete, wherein said stone is the continuous size fraction rubble of 5-25mm, clay content≤1.5%.
Aforesaid C70 high-strength concrete, wherein said flyash is I grade, activity index >=70%, loss on ignition≤5%, SO3Content≤3.0%, requirement ratio≤95%.
Aforesaid C70 high-strength concrete, wherein said slag powders selects S95 level, water content≤1%, fluidity ratio >=95%, specific surface area >=400m2/kg。
Aforesaid C70 high-strength concrete, wherein said efficient retarding and water reducing agent uses SikaPlast1220, and water-reducing rate is 30%.
Aforesaid C70 high-strength concrete, wherein said water is drinking water.
A kind of C70 high-strength concrete preparation method as claimed in claim 1, it is characterized in that, weigh required cement by formula proportion, sand, stone, flyash, slag powders carry out mechanical agitation in pouring blender into, dry stir 1-2 minute, make them be uniformly mixed together into mixed dry material;Then weigh efficient retarding and water reducing agent and water by formula proportion, it is mixed in a reservoir required water preparation;The water preparation prepared is slowly added in the mixed dry material of mix homogeneously, blender stirs 2-4 minute uniformly Cracking of High Flowing Concrete.
The C70 high-strength concrete preparation method of the present invention can also be further achieved by the following technical measures.
Aforesaid method, the water-cement ratio of wherein said Cracking of High Flowing Concrete is 0.25-0.29.
After using technique scheme, C70 high-strength concrete of the present invention and preparation method thereof has the advantage that
1, the high-strength concrete pumping of high-rise building Core Walls Structure it is applicable to;
2, by C70 high-strength concrete reasonable disposition, meet the requirement of the pump concrete slump 220 ± 30mm, there is good mobility;
3, concrete strength meets design requirement, economical rationality, has the stronger suitability and engineering promotional value widely.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is illustrated further.
Embodiment 1
The C70 high-strength concrete of the present invention, the proportioning that the configuration of every cubic metre of C70 high-strength concrete uses is: cement uses Carnis Rapanae thomasianae P. II 52.5:399 kilogram;Sand: 650 kilograms;981 kilograms of stone.I grade of flyash: 90 kilograms;S95 slag powders: 97 kilograms;SikaPlast1220 efficient retarding and water reducing agent: 7.91 kilograms;Water: 165 kilograms.
Wherein, described cement is P. II 52.5 portland cement, 3d rupture strength 6.0Mpa, comprcssive strength 29.9Mpa, and initial set must not be early than 45 minutes, and final set must not be later than 390 minutes;Described sand is river sand, clay content≤2%, modulus of fineness 2.6;Described stone is the continuous grading rubble of 5-25mm, clay content≤1.5%;Described flyash is I grade, activity index >=70%, loss on ignition≤5%, SO3Content≤3.0%, requirement ratio≤95%;Described slag powders selects S95 level, water content≤1%, fluidity ratio >=95%, specific surface area >=400m2/kg;Described efficient retarding and water reducing agent uses SikaPlast1220, and water-reducing rate is 30%;Described water is drinking water.
Embodiment 2
The C70 high-strength concrete preparation method of the present invention, various proportioning raw materials according to embodiment 1, weigh required cement by formula proportion, sand, stone, flyash, slag powders carry out mechanical agitation in pouring blender into, dry stir 2 minutes, make them be uniformly mixed together into mixed dry material;Then weigh efficient retarding and water reducing agent and water by formula proportion, it is mixed in a reservoir required water preparation;The water preparation prepared is slowly added in the mixed dry material of mix homogeneously, blender stirs 3 minutes uniformly Cracking of High Flowing Concrete;The water-cement ratio of described Cracking of High Flowing Concrete is 0.27.
The relevant art index of the C70 high-strength concrete obtained after configuration is as follows:
High-strength concrete water-cement ratio is 0.28;Sand coarse aggregate ratio 40%;Mark supports (28d) cubic compressive strength 80.5Mpa.Wherein the slump is 240mm, meets the pumping of high-rise building engineering, and has relatively high fluidity and the slump is the requirement of 220 ± 30mm.
The present invention has substantive distinguishing features and significant technological progress, C70 high-strength concrete of the present invention and preparation method thereof is by C70 high-strength concrete reasonable disposition, meet the requirement of the pump concrete slump 220 ± 30mm, there is good mobility, concrete strength meets design requirement, economical rationality, has stronger applied value.
C70 high-strength concrete of the present invention and preparation method thereof is applied in building height reaches Guo Jin center, the Xiamen high-rise building engineering of 138.5m, good service behaviour, meets the construction requirement of super high-rise pumping, obtains satisfied engineering effort.
Above example is used for illustrative purposes only, rather than limitation of the present invention, person skilled in the relevant technique, without departing from the spirit and scope of the present invention, it is also possible to make various conversion or change.Therefore, the technical scheme of all equivalents also should belong to scope of the invention, should be limited by each claim.

Claims (10)

1. a C70 high-strength concrete, it is characterised in that the mass percent of each component is:
Cement 15.2~17.3%
Sand 25~30%
Stone 38~45%
Flyash 4~5%
Slag powders 3.5~5.0%
Efficient retarding and water reducing agent 0.3~0.4%
Water 6~6.5%.
2. C70 high-strength concrete as claimed in claim 1, described cement is P. II 52.5 portland cement, 3d rupture strength 6.0Mpa, comprcssive strength 29.9Mpa, and initial set must not be early than 45 minutes, and final set must not be later than 390 minutes.
3. C70 high-strength concrete as claimed in claim 1, described sand is river sand, clay content≤2%, modulus of fineness 2.6.
4. C70 high-strength concrete as claimed in claim 1, described stone is the continuous grading rubble of 5-25mm, clay content≤1.5%.
5. C70 high-strength concrete as claimed in claim 1, described flyash is I grade, activity index >=70%, loss on ignition≤5%, SO3Content≤3.0%, requirement ratio≤95%.
6. C70 high-strength concrete as claimed in claim 1, described slag powders selects S95 level, water content≤1%, fluidity ratio >=95%, specific surface area >=400m2/kg。
7. C70 high-strength concrete as claimed in claim 1, described efficient retarding and water reducing agent uses SikaPlast1220, and water-reducing rate is 30%.
8. C70 high-strength concrete as claimed in claim 1, described water is drinking water.
9. a C70 high-strength concrete preparation method as claimed in claim 1, it is characterized in that, weigh required cement by formula proportion, sand, stone, flyash, slag powders carry out mechanical agitation in pouring blender into, dry stir 1-2 minute, make them be uniformly mixed together into mixed dry material;Then weigh efficient retarding and water reducing agent and water by formula proportion, it is mixed in a reservoir required water preparation;The water preparation prepared is slowly added in the mixed dry material of mix homogeneously, blender stirs 2-4 minute uniformly Cracking of High Flowing Concrete.
10. C70 high-strength concrete preparation method as claimed in claim 9, the water-cement ratio of described Cracking of High Flowing Concrete is 0.25-0.29.
CN201510159956.0A 2015-04-07 2015-04-07 A kind of C70 high-strength concrete and preparation method thereof Pending CN106145809A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107382209A (en) * 2017-08-24 2017-11-24 重庆三圣实业股份有限公司 A kind of modified high flowability concrete
CN107555899A (en) * 2017-08-24 2018-01-09 重庆三圣实业股份有限公司 A kind of good high flowability concrete of pump-conveying property
CN107777981A (en) * 2017-11-02 2018-03-09 广东工业大学 A kind of regeneration concrete and preparation method thereof
CN109592949A (en) * 2019-02-18 2019-04-09 陕西宏基混凝土构件有限责任公司 Meet the concrete and its pumping method of super high pump-conveying
CN110615642A (en) * 2019-10-14 2019-12-27 上海浦盈混凝土有限公司 Concrete containing high-activity slag powder and preparation method thereof

Citations (5)

* Cited by examiner, † Cited by third party
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
CN101195530A (en) * 2006-03-22 2008-06-11 西安建筑科技大学 Concrete with strength grade of C70 for section steel concrete composite structure
JP2010275155A (en) * 2009-05-29 2010-12-09 Zyuku Ltd Concrete composition, concrete structure and block for fish reef or spawning reef
CN102503260A (en) * 2011-10-18 2012-06-20 合肥天柱包河特种混凝土有限公司 Concrete
CN102503262A (en) * 2011-10-19 2012-06-20 合肥天柱包河特种混凝土有限公司 Self-compacting concrete and design method of mixing proportion thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
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
CN101195530A (en) * 2006-03-22 2008-06-11 西安建筑科技大学 Concrete with strength grade of C70 for section steel concrete composite structure
JP2010275155A (en) * 2009-05-29 2010-12-09 Zyuku Ltd Concrete composition, concrete structure and block for fish reef or spawning reef
CN102503260A (en) * 2011-10-18 2012-06-20 合肥天柱包河特种混凝土有限公司 Concrete
CN102503262A (en) * 2011-10-19 2012-06-20 合肥天柱包河特种混凝土有限公司 Self-compacting concrete and design method of mixing proportion thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107382209A (en) * 2017-08-24 2017-11-24 重庆三圣实业股份有限公司 A kind of modified high flowability concrete
CN107555899A (en) * 2017-08-24 2018-01-09 重庆三圣实业股份有限公司 A kind of good high flowability concrete of pump-conveying property
CN107777981A (en) * 2017-11-02 2018-03-09 广东工业大学 A kind of regeneration concrete and preparation method thereof
CN109592949A (en) * 2019-02-18 2019-04-09 陕西宏基混凝土构件有限责任公司 Meet the concrete and its pumping method of super high pump-conveying
CN110615642A (en) * 2019-10-14 2019-12-27 上海浦盈混凝土有限公司 Concrete containing high-activity slag powder and preparation method thereof

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