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 PDFInfo
- 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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- 239000011372 high-strength concrete Substances 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
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- 239000004567 concrete Substances 0.000 claims abstract description 23
- 239000004568 cement Substances 0.000 claims abstract description 15
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- 239000002893 slag Substances 0.000 claims abstract description 10
- 239000004575 stone Substances 0.000 claims abstract description 10
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- 238000005336 cracking Methods 0.000 claims description 6
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- 238000003756 stirring Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 abstract description 12
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- 238000000034 method Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
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- 230000001737 promoting Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N silicon Chemical compound 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[Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 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
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
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.
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| 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 |
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