CN106830833A - The method of the match ratio of C80~C90 high performance concretes - Google Patents
The method of the match ratio of C80~C90 high performance concretes Download PDFInfo
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- CN106830833A CN106830833A CN201710052760.0A CN201710052760A CN106830833A CN 106830833 A CN106830833 A CN 106830833A CN 201710052760 A CN201710052760 A CN 201710052760A CN 106830833 A CN106830833 A CN 106830833A
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- 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
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- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
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- Chemical Kinetics & Catalysis (AREA)
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- Materials Engineering (AREA)
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- Organic Chemistry (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
A kind of method of the match ratio of C80~C90 high performance concretes.C80~C90 Strength of High Performance Concrete is high, and composition material is wide in variety, and intensity effect factor is more, in many intensity effect factors, the ratio of mud holds pride of place, therefore, when mix-design is carried out to this kind of concrete, be difficult to make if the ratio of mud is determined using theoretical calculation come.The present invention is that conventional concrete mixing proportion design method is overturned, the determination system experience that its core is embodied in the ratio of mud drafts value, rather than calculated value, in other words, the ratio of mud of high performance concrete be not theoretical calculation out, concrete mix is nor only by calculating and designing the simple problem that can just solve, but on the basis of practical experience accumulation and constantly summarizing, draft an expected ratio of mud in advance, the value is must not exceed during trial, the practicality conclusion obtained with reference to a series of targeted, directive rigorous experiments.The present invention is applied to building material field.
Description
Technical field：
The present invention relates to a kind of method of the match ratio of C80~C90 high performance concretes.
Background technology：
Traditional mix Design follows Bolomey's formula, i.e. concrete strength and ratio of mud relational expression,
In the match ratio, the ratio of mud is obtained by theoretical calculation, and this is also the core of early concrete match ratio.The match ratio sets
Meter trial process is extremely cumbersome, and success rate is very low.
~C90 Strength of High Performance Concrete is high, and composition material is wide in variety, and intensity effect factor is more, in many intensity effects
In factor, the ratio of mud holds pride of place, therefore, when mix-design is carried out to this kind of concrete, if true using theoretical calculation
Determine the ratio of mud to be then difficult to make.
The content of the invention：
It is an object of the invention to provide a kind of method of the match ratio of C80~C90 high performance concretes.
Above-mentioned purpose is realized by following technical scheme：
A kind of method of the match ratio of C80~C90 high performance concretes, the method comprises the following steps：The match ratio preparatory stage
And the determination of trial strength：
（1）C80 grades of concrete optimum intensity can be by 88MPa controls.
（2）C90 grades of concrete optimum intensity can be by 99MPa controls.
The method of the match ratio of described C80~C90 high performance concretes, each composition material quality requirement of match ratio：
（1）Coarse aggregate：C80~C90 concrete coarse aggregate nominal maximum particle diameter is not preferably greater than 16.0mm, and the two should preferentially be selected
Continuous grading hammer breaks or impact crushing crusher machine rubble, must not crush rubble using jaw crusher.Rubble masterbatch is preferably preferably profound
The rocks such as Wu Yan, andesite, limestone, its uniaxial compressive strength is preferably greater than 130MPa, and rubble crush values are preferably less than 3%, gill shape
Content is preferably less than 2%, and clay content is not preferably greater than 0%, and content of stone powder is not preferably greater than 0.5%, and rubble apparent density is preferably greater than 2.78g/
Cm3, other objectionable impurities contents are less than respective standard setting.
Fine aggregate：Preferential to select II area's river sand, the modulus of fineness of sand is preferably 2.6~3.2, and clay content is preferably less than 1.0%, table
See density and be preferably greater than 2.78 g/cm3, loose bulk density is preferably greater than 1550kg/m3.If workability meets construction requirement, also may be used
With from clean Machine-made Sand.
Cement：Portland cement preferentially is selected, early strength requirement height or high content mineral admixtures are mixed
Solidifying soil, can select portland cement.28 days rupture strengths of cement are preferably greater than 8.5 MPa, and compression strength is preferably greater than 55.0 MPa.
Additive：Preferential to select high-performance water reducing agent or high efficiency water reducing agent, representative kind is polycarboxylate system.
Mineral admixture：Preferentially select I grade of flyash（Common engineering, inessential engineering also can select II grade of flyash）,
Preferential to fill SILICA FUME if necessary from mineral admixtures such as S95 grades of ground granulated blast furnace slag powders, dioxide-containing silica is suitable
More than 95%.
Mixing water：It is preferential to select drinking water mixing concrete, it is also possible to using meeting other water sources of JGJ63-2006
Water.
The method of the match ratio of described C80~C90 high performance concretes, match ratio determines the folk prescription material usage stage：
（1）C80~C90 high performance concretes need to use two or more Binder Materials, it is contemplated that image is accurate, and this match ratio will
The traditional ratio of mud renames as water-cement ratio；
（2）According to engineering experience, the water-cement ratio of C80~C90 high performance concretes is preferably controlled between 0.20~0.26.Specifically take
Value standard is：C80 concrete values are preferably between 0.23~0.26, and C90 concrete values are preferably between 0.20~0.23；Composition
Concrete raw material quality better, water-cement ratio can take large values；Conversely, composition concrete raw material inferior quality, water-cement ratio preferably takes small
Value.In a word, no matter composition concrete raw material quality, water-binder ratio takes smaller value, it is easier to obtain desired examination
With intensity, it is easier to meet life requirement；
（3）On the premise of material property and quality determine, according to historical data and experience, expected water-cement ratio is tentatively drafted
Size, but the water-cement ratio drafted in advance is must not exceed during trial mix；
（4）Determine the various material usages of a cubic meter of concrete by assuming that apparent density method is calculated；
（5）Each strength grade concrete selects three kinds of different cement consumption trial mix concrete, between every kind of different cement consumptions
Difference 20kg, control workability is constant, with last actual used water amount inverse water-cement ratio, certainly must be by water-cement ratio control during operation
System within expection, easily grasp, and success rate is high by this kind of way, and control water-cement ratio is the core of this way, and it is this to meet workability
The target of way.After fresh concrete workability and Slump Time losing of Large meet requirement, three kinds of different mixture ratios of packing compact forming
Make a strength test, test each age strength, trial strength requirement, and cement and other gellings were met with 28 days compression strength
Material sum cost the lowest is used as benchmark match ratio；
（6）By folk prescription raw material usage determined above, expected water-cement ratio, different match ratios 25~35 liters of coagulations of equal trial mix
Soil, is used to check concrete mix workability and intensity.
The method of the match ratio of described C80~C90 high performance concretes, determines that one stands by assuming that apparent density method is calculated
The square various material usages of rice concrete：
（1）It is assumed that C80~C90 high performance concretes apparent density is 2480 ± 50 kg/m3, fresh concrete actual measurement is apparent close
When degree and its error are within ± 2%, can not be modified, otherwise, reply apparent density is modified.
（2）Cement folk prescription consumption.Detection is combined according to actual cement strength and construction experience is drafted, C80 concrete match ratios
Than desirable 410kg~460kg；C90 concrete mixs can use 440kg~480kg.
（3）Flyash folk prescription consumption.According to match ratio use environment, position, flyash quality, user to concrete each age
The limitations affect factors such as the different requirements of phase intensity, the volume that flyash may be selected accounts for the 15%~30% of Binder Materials.
（4）Ground granulated blast furnace slag powders folk prescription consumption.According to match ratio use environment, position, ground granulated blast furnace ore deposit
Ground-slag quality, user may be selected ground granulated blast furnace slag to limitations affect factors such as the different requirements of each age strength of concrete
The volume of powder accounts for the 15%~30% of Binder Materials.
（5）The volume of SILICA FUME is preferably 5%~12%.
（6）Mineral admixture total amount is preferably between the 25%~45% of binder total amount.
（7）（3）~（5）Mineral admixture can need to mix one or several according to construction, but be also not limited to these three,
The mineral admixture of other kinds also may be selected through pass the test.
（8）Sand coarse aggregate ratio determines.Level according to sand is matched somebody with somebody, modulus of fineness, coarse aggregate maximum particle diameter, water-cement ratio, requirement of engineering, mixed
Solidifying soil transport, the different choice sand coarse aggregate ratio of mode of movement, typically can use 33%~40%.
（9）The determination of folk prescription water consumption.According to the cement consumption and water-cement ratio drafted, folk prescription water consumption is calculated.
（10）After each material usage determines above, thick, fine aggregate consumption can be calculated.
（11）The determination of high-performance water reducing agent consumption.According to the water-reducing rate of high-performance water reducing agent, the water-cement ratio drafted is applied
The slump that work, transport, pouring construction need determines its consumption.
The method of the match ratio of described C80~C90 high performance concretes, match ratio trial mix stage：
（1）During load weighted coarse aggregate, fine aggregate sequentially added into mixer, 15s is stirred, is subsequently adding 65% water,
25~35 s of stirring, addition cement and admixture, 40~60s of stirring, the water and high-performance water reducing agent of addition 25%, stirring 90~
120s, observes concrete workability while stirring, if concrete flowability is small, adds remaining 10% water；If concrete flowability
It is still small, then continuously add 0.2%~0.5%（If concrete coagulating time, outward appearance are normal, and before its intensity is not influenceed
Put, it is also possible to properly increase additive mix ratio, so that strict control water-cement ratio is without departing from desired value.）High-performance subtract
Aqua, continues to stir 90~120s, if concrete workability meets requiring, discharging carries out further work, finally appraises and decides reality
Border water consumption, appraises and decides water-cement ratio, and the water-cement ratio cannot be greater than the expected water-cement ratio drafted in advance.
（2）If concrete workability is unsatisfactory for requiring, need to consider that high-performance water reducing agent is asked with the compatibility of cement first
Topic, secondly considers and other Binder Materials and high-performance water reducing agent consistency problem or the quality problems gathered materials（Surface characteristics and
Clean level etc.）；Conversely, the water consumption being computed show a small surplus and the workability of concrete fully meet construction needs, this is
Optimal result.
（3）Stirring detects the workability of fresh concrete after finishing, meet and be put into static one section in lidded container after requiring
Time detecting concrete slump gradual loss, this index finally appraises and decides water-cement ratio after meeting requirement.
（4）After meeting requirement by the Slump Time losing of Large of the time interval determination of stirring, transport and Construction control, determine
The apparent density of concrete, the density can not adjust each material usage of match ratio with when assuming apparent density error less than 2%, instead
It, the error need to correct adjustment each material usage of match ratio when being more than or equal to 2%, finally appraise and decide the apparent density of the match ratio.
（5）Packing compact forming concrete sample, is covered with plastic foil, is placed on 20 ± 2 DEG C, ring of the relative humidity more than 95%
Conserved in border to the demoulding, the test specimen of the demoulding be placed on 20 ± 2 DEG C, relative humidity conserved in the moisture health-preserving chamber more than 95% to
The age of needs, test each age strength.
（6）Other two kinds of match ratios of cement consumption are also tested by the above process, and each age strength is all completed
Afterwards, three 28 days age strengths of composition and division in a proportion are assembled contrasted, choose Workable, intensity is high, integrated cost reckling is used as benchmark
Match ratio.
Beneficial effects of the present invention：
1. the alleged high performance concrete of the present invention refers to high fluidity, high volume stability, suitable intensity and high-durability
Concrete.The concrete is by cement, mineral admixture（With flyash, ground granulated blast furnace slag powders and silicon ash etc. as representative）
At least six kinds components such as water, coarse aggregate and fine aggregate, additive composition, this is a kind of new concrete, and traditional
Concrete is very different, it may be said that this is the revolution in concrete technology development history.
The present invention is that conventional concrete mixing proportion design method is overturned, and its core is embodied in the determination system warp of the ratio of mud
Test and draft value, rather than calculated value, in other words, the ratio of mud of high performance concrete be not theoretical calculation out, concrete matched
Composition and division in a proportion is nor only by calculating and design the simple problem that can just solve, but accumulate and the continuous base summarized in practical experience
On plinth, an expected ratio of mud is drafted in advance, the value is must not exceed during trial, with reference to targeted, directive a series of
It is rigorous experiment and obtain practicality conclusion.The mix Design process carried out as core is simple and clear, success
Rate is very high, and cost performance is of great satisfaction.Proved through a large amount of engineering practices, the present invention is novel, with very strong operational and real
The property used.
Brief description of the drawings：
Accompanying drawing 1 is system frame structure schematic diagram of the invention.
In figure：Note：1.“" represent Double-horizontal-shaft concrete forced stirrer；2. actual water should ensure that during match ratio trial mix
Glue is than being not more than expected water-cement ratio.
Specific embodiment：
Embodiment 1：
A kind of method of the match ratio of C80~C90 high performance concretes, the method comprises the following steps：The match ratio preparatory stage
And the determination of trial strength：
（1）C80 grades of concrete optimum intensity can be by 88MPa controls.
（2）C90 grades of concrete optimum intensity can be by 99MPa controls.
Embodiment 2：
The method of the match ratio of the C80~C90 high performance concretes according to embodiment 1, each composition material quality of match ratio
It is required that：
（1）Coarse aggregate：C80~C90 concrete coarse aggregate nominal maximum particle diameter is not preferably greater than 16.0mm, and the two should preferentially be selected
Continuous grading hammer breaks or impact crushing crusher machine rubble, must not crush rubble using jaw crusher.Rubble masterbatch is preferably preferably profound
The rocks such as Wu Yan, andesite, limestone, its uniaxial compressive strength is preferably greater than 130MPa, and rubble crush values are preferably less than 3%, gill shape
Content is preferably less than 2%, and clay content is not preferably greater than 0%, and content of stone powder is not preferably greater than 0.5%, and rubble apparent density is preferably greater than 2.78g/
Cm3, other objectionable impurities contents are less than respective standard setting.
Fine aggregate：Preferential to select II area's river sand, the modulus of fineness of sand is preferably 2.6~3.2, and clay content is preferably less than 1.0%, table
See density and be preferably greater than 2.78 g/cm3, loose bulk density is preferably greater than 1550kg/m3.If workability meets construction requirement, also may be used
With from clean Machine-made Sand.
Cement：Portland cement preferentially is selected, early strength requirement height or high content mineral admixtures are mixed
Solidifying soil, can select portland cement.28 days rupture strengths of cement are preferably greater than 8.5 MPa, and compression strength is preferably greater than 55.0 MPa.
Additive：Preferential to select high-performance water reducing agent or high efficiency water reducing agent, representative kind is polycarboxylate system.
Mineral admixture：Preferentially select I grade of flyash（Common engineering, inessential engineering also can select II grade of flyash）,
Preferential to fill SILICA FUME if necessary from mineral admixtures such as S95 grades of ground granulated blast furnace slag powders, dioxide-containing silica is suitable
More than 95%.
Mixing water：It is preferential to select drinking water mixing concrete, it is also possible to using meeting other water sources of JGJ63-2006
Water.
Embodiment 3：
The method of the match ratio of the C80~C90 high performance concretes according to embodiment 1 or 2, match ratio determines folk prescription material
The consumption stage：
（1）C80~C90 high performance concretes need to use two or more Binder Materials, it is contemplated that image is accurate, and this match ratio will
The traditional ratio of mud renames as water-cement ratio；
（2）According to engineering experience, the water-cement ratio of C80~C90 high performance concretes is preferably controlled between 0.20~0.26.Specifically take
Value standard is：C80 concrete values are preferably between 0.23~0.26, and C90 concrete values are preferably between 0.20~0.23；Composition
Concrete raw material quality better, water-cement ratio can take large values；Conversely, composition concrete raw material inferior quality, water-cement ratio preferably takes small
Value.In a word, no matter composition concrete raw material quality, water-binder ratio takes smaller value, it is easier to obtain desired examination
With intensity, it is easier to meet life requirement；
（3）On the premise of material property and quality determine, according to historical data and experience, expected water-cement ratio is tentatively drafted
Size, but the water-cement ratio drafted in advance is must not exceed during trial mix；
（4）Determine the various material usages of a cubic meter of concrete by assuming that apparent density method is calculated；
（5）Each strength grade concrete selects three kinds of different cement consumption trial mix concrete, between every kind of different cement consumptions
Difference 20kg, control workability is constant, with last actual used water amount inverse water-cement ratio, certainly must be by water-cement ratio control during operation
System within expection, easily grasp, and success rate is high by this kind of way, and control water-cement ratio is the core of this way, and it is this to meet workability
The target of way.After fresh concrete workability and Slump Time losing of Large meet requirement, three kinds of different mixture ratios of packing compact forming
Make a strength test, test each age strength, trial strength requirement, and cement and other gellings were met with 28 days compression strength
Material sum cost the lowest is used as benchmark match ratio；
（6）By folk prescription raw material usage determined above, expected water-cement ratio, different match ratios 25~35 liters of coagulations of equal trial mix
Soil, is used to check concrete mix workability and intensity.
Embodiment 4：
The method of the match ratio of the C80~C90 high performance concretes according to embodiment 1 or 2 or 3, by hypothesis apparent density
Method is calculated and determines the various material usages of a cubic meter of concrete：
（1）It is assumed that C80~C90 high performance concretes apparent density is 2480 ± 50 kg/m3, fresh concrete actual measurement is apparent close
When degree and its error are within ± 2%, can not be modified, otherwise, reply apparent density is modified.
（2）Cement folk prescription consumption.Detection is combined according to actual cement strength and construction experience is drafted, C80 concrete match ratios
Than desirable 410kg~460kg；C90 concrete mixs can use 440kg~480kg.
（3）Flyash folk prescription consumption.According to match ratio use environment, position, flyash quality, user to concrete each age
The limitations affect factors such as the different requirements of phase intensity, the volume that flyash may be selected accounts for the 15%~30% of Binder Materials.
（4）Ground granulated blast furnace slag powders folk prescription consumption.According to match ratio use environment, position, ground granulated blast furnace ore deposit
Ground-slag quality, user may be selected ground granulated blast furnace slag to limitations affect factors such as the different requirements of each age strength of concrete
The volume of powder accounts for the 15%~30% of Binder Materials.
（5）The volume of SILICA FUME is preferably 5%~12%.
（6）Mineral admixture total amount is preferably between the 25%~45% of binder total amount.
（7）（3）~（5）Mineral admixture can need to mix one or several according to construction, but be also not limited to these three,
The mineral admixture of other kinds also may be selected through pass the test.
（8）Sand coarse aggregate ratio determines.Level according to sand is matched somebody with somebody, modulus of fineness, coarse aggregate maximum particle diameter, water-cement ratio, requirement of engineering, mixed
Solidifying soil transport, the different choice sand coarse aggregate ratio of mode of movement, typically can use 33%~40%.
（9）The determination of folk prescription water consumption.According to the cement consumption and water-cement ratio drafted, folk prescription water consumption is calculated.
（10）After each material usage determines above, thick, fine aggregate consumption can be calculated.
（11）The determination of high-performance water reducing agent consumption.According to the water-reducing rate of high-performance water reducing agent, the water-cement ratio drafted is applied
The slump that work, transport, pouring construction need determines its consumption.
Embodiment 5：
The method of the match ratio of the C80~C90 high performance concretes according to embodiment 1 or 2 or 3 or 4, match ratio trial mix rank
Section：
（1）During load weighted coarse aggregate, fine aggregate sequentially added into mixer, 15s is stirred, is subsequently adding 65% water,
25~35 s of stirring, addition cement and admixture, 40~60s of stirring, the water and high-performance water reducing agent of addition 25%, stirring 90~
120s, observes concrete workability while stirring, if concrete flowability is small, adds remaining 10% water；If concrete flowability
It is still small, then continuously add 0.2%~0.5%（If concrete coagulating time, outward appearance are normal, and before its intensity is not influenceed
Put, it is also possible to properly increase additive mix ratio, so that strict control water-cement ratio is without departing from desired value.）High-performance subtract
Aqua, continues to stir 90~120s, if concrete workability meets requiring, discharging carries out further work, finally appraises and decides reality
Border water consumption, appraises and decides water-cement ratio, and the water-cement ratio cannot be greater than the expected water-cement ratio drafted in advance.
（2）If concrete workability is unsatisfactory for requiring, need to consider that high-performance water reducing agent is asked with the compatibility of cement first
Topic, secondly considers and other Binder Materials and high-performance water reducing agent consistency problem or the quality problems gathered materials（Surface characteristics and
Clean level etc.）；Conversely, the water consumption being computed show a small surplus and the workability of concrete fully meet construction needs, this is
Optimal result.
（3）Stirring detects the workability of fresh concrete after finishing, meet and be put into static one section in lidded container after requiring
Time detecting concrete slump gradual loss, this index finally appraises and decides water-cement ratio after meeting requirement.
（4）After meeting requirement by the Slump Time losing of Large of the time interval determination of stirring, transport and Construction control, determine
The apparent density of concrete, the density can not adjust each material usage of match ratio with when assuming apparent density error less than 2%, instead
It, the error need to correct adjustment each material usage of match ratio when being more than or equal to 2%, finally appraise and decide the apparent density of the match ratio.
（5）Packing compact forming concrete sample, is covered with plastic foil, is placed on 20 ± 2 DEG C, ring of the relative humidity more than 95%
Conserved in border to the demoulding, the test specimen of the demoulding be placed on 20 ± 2 DEG C, relative humidity conserved in the moisture health-preserving chamber more than 95% to
The age of needs, test each age strength.
（6）Other two kinds of match ratios of cement consumption are also tested by the above process, and each age strength is all completed
Afterwards, three 28 days age strengths of composition and division in a proportion are assembled contrasted, choose Workable, intensity is high, integrated cost reckling is used as benchmark
Match ratio.
Claims (4)
1. a kind of C80~C90 high performance concretes, it is characterized in that：The method comprises the following steps：Match ratio preparatory stage and examination
Determination with intensity：
（1）C80 grades of concrete optimum intensity can be by 88MPa controls；
（2）C90 grades of concrete optimum intensity can be by 99MPa controls；
Each composition material quality requirement of match ratio：
（1）Coarse aggregate：C80~C90 concrete coarse aggregate nominal maximum particle diameter is not preferably greater than 16.0mm, and the two should preferentially be selected
Continuous grading hammer breaks or impact crushing crusher machine rubble, must not crush rubble using jaw crusher.Rubble masterbatch is preferably preferably profound
The rocks such as Wu Yan, andesite, limestone, its uniaxial compressive strength is preferably greater than 130MPa, and rubble crush values are preferably less than 3%, gill shape
Content is preferably less than 2%, and clay content is not preferably greater than 0%, and content of stone powder is not preferably greater than 0.5%, and rubble apparent density is preferably greater than 2.78g/
Cm3, other objectionable impurities contents are less than respective standard setting.
(2) fine aggregate：Preferential to select II area's river sand, the modulus of fineness of sand is preferably 2.6~3.2, and clay content is preferably less than 1.0%, apparent
Density is preferably greater than 2.78 g/cm3, and loose bulk density is preferably greater than 1550kg/m3.If workability meets construction requirement, it is also possible to
From clean Machine-made Sand.
(3) cement：Portland cement preferentially is selected, high to early strength requirement or high content mineral admixtures coagulations
Soil, can select portland cement.28 days rupture strengths of cement are preferably greater than 8.5 MPa, and compression strength is preferably greater than 55.0 MPa.
(4) additive：Preferential to select high-performance water reducing agent or high efficiency water reducing agent, representative kind is polycarboxylate system.
(5) mineral admixture：Preferentially select I grade of flyash（Common engineering, inessential engineering also can select II grade of flyash）, it is excellent
First from mineral admixtures such as S95 grades of ground granulated blast furnace slag powders, SILICA FUME can be filled if necessary, dioxide-containing silica is preferably big
In 95%.
(6) mixing water：It is preferential to select drinking water mixing concrete, it is also possible to using meeting other water sources of JGJ63-2006
Water.
2. C80~C90 high performance concretes according to claim 1, it is characterized in that：Match ratio determines folk prescription material usage
Stage：
（1）C80~C90 high performance concretes need to use two or more Binder Materials, it is contemplated that image is accurate, and this match ratio will
The traditional ratio of mud renames as water-cement ratio；
（2）According to engineering experience, the water-cement ratio of C80~C90 high performance concretes is preferably controlled between 0.20~0.26.Specifically take
Value standard is：C80 concrete values are preferably between 0.23~0.26, and C90 concrete values are preferably between 0.20~0.23；Composition
Concrete raw material quality better, water-cement ratio can take large values；Conversely, composition concrete raw material inferior quality, water-cement ratio preferably takes small
Value.In a word, no matter composition concrete raw material quality, water-binder ratio takes smaller value, it is easier to obtain desired examination
With intensity, it is easier to meet life requirement；
（3）On the premise of material property and quality determine, according to historical data and experience, expected water-cement ratio is tentatively drafted
Size, but the water-cement ratio drafted in advance is must not exceed during trial mix；
（4）Determine the various material usages of a cubic meter of concrete by assuming that apparent density method is calculated；
（5）Each strength grade concrete selects three kinds of different cement consumption trial mix concrete, between every kind of different cement consumptions
Difference 20kg, control workability is constant, with last actual used water amount inverse water-cement ratio, certainly must be by water-cement ratio control during operation
System within expection, easily grasp, and success rate is high by this kind of way, and control water-cement ratio is the core of this way, and it is this to meet workability
The target of way.After fresh concrete workability and Slump Time losing of Large meet requirement, three kinds of different mixture ratios of packing compact forming
Make a strength test, test each age strength, trial strength requirement, and cement and other gellings were met with 28 days compression strength
Material sum cost the lowest is used as benchmark match ratio；
（6）By folk prescription raw material usage determined above, expected water-cement ratio, different match ratios 25~35 liters of coagulations of equal trial mix
Soil, is used to check concrete mix workability and intensity.
3. C80~C90 high performance concretes according to claim 1 and 2, it is characterized in that：Based on apparent density method is assumed
Calculate and determine the various material usages of a cubic meter of concrete：
（1）It is assumed that C80~C90 high performance concretes apparent density is 2480 ± 50 kg/m3, fresh concrete actual measurement is apparent close
When degree and its error are within ± 2%, can not be modified, otherwise, reply apparent density is modified.
（2）Cement folk prescription consumption.Detection is combined according to actual cement strength and construction experience is drafted, C80 concrete mixs can
Take 410kg~460kg；C90 concrete mixs can use 440kg~480kg.
（3）Flyash folk prescription consumption.It is strong to concrete each age according to match ratio use environment, position, flyash quality, user
The limitations affect factors such as the different requirements of degree, the volume that flyash may be selected accounts for the 15%~30% of Binder Materials.
（4）Ground granulated blast furnace slag powders folk prescription consumption.According to match ratio use environment, position, ground granulated blast furnace slag powders
Quality, user may be selected ground granulated blast furnace slag powders to limitations affect factors such as the different requirements of each age strength of concrete
Volume accounts for the 15%~30% of Binder Materials.
（5）The volume of SILICA FUME is preferably 5%~12%.
（6）Mineral admixture total amount is preferably between the 25%~45% of binder total amount.
（7）（3）~（5）Mineral admixture can need to mix one or several according to construction, but be also not limited to these three, through examination
Test the qualified mineral admixture that other kinds also may be selected.
（8）Sand coarse aggregate ratio determines.Level according to sand is matched somebody with somebody, modulus of fineness, coarse aggregate maximum particle diameter, water-cement ratio, requirement of engineering, concrete
Transport, the different choice sand coarse aggregate ratio of mode of movement, typically can use 33%~40%.
（9）The determination of folk prescription water consumption.According to the cement consumption and water-cement ratio drafted, folk prescription water consumption is calculated.
（10）After each material usage determines above, thick, fine aggregate consumption can be calculated.
（11）The determination of high-performance water reducing agent consumption.According to the water-reducing rate of high-performance water reducing agent, the water-cement ratio drafted, construction, fortune
The slump that defeated, pouring construction needs determines its consumption.
4. the fitting method of the C80~C90 high performance concretes according to claim 1 or 2 or 3, it is characterized in that：Match ratio
The trial mix stage：
（1）During load weighted coarse aggregate, fine aggregate sequentially added into mixer, 15s is stirred, is subsequently adding 65% water,
25~35 s of stirring, addition cement and admixture, 40~60s of stirring, the water and high-performance water reducing agent of addition 25%, stirring 90~
120s, observes concrete workability while stirring, if concrete flowability is small, adds remaining 10% water；If concrete flowability
It is still small, then continuously add 0.2%~0.5%（If concrete coagulating time, outward appearance are normal, and before its intensity is not influenceed
Put, it is also possible to properly increase additive mix ratio, so that strict control water-cement ratio is without departing from desired value.）High-performance subtract
Aqua, continues to stir 90~120s, if concrete workability meets requiring, discharging carries out further work, finally appraises and decides reality
Border water consumption, appraises and decides water-cement ratio, and the water-cement ratio cannot be greater than the expected water-cement ratio drafted in advance.
（2）If concrete workability is unsatisfactory for requiring, need to consider the consistency problem of high-performance water reducing agent and cement first, its
Secondary consideration and other Binder Materials and high-performance water reducing agent consistency problem or the quality problems gathered materials（Surface characteristics and clean journey
Degree etc.）；Conversely, the water consumption being computed show a small surplus and the workability of concrete fully meet construction needs, this is most preferable
Result.
（3）Stirring detects the workability of fresh concrete after finishing, to meet and be put into static a period of time in lidded container after requiring
Detection concrete slump gradual loss, this index finally appraises and decides water-cement ratio after meeting requirement.
（4）After meeting requirement by the Slump Time losing of Large of the time interval determination of stirring, transport and Construction control, determine mixed
The apparent density of soil is coagulated, the density can not adjust each material usage of match ratio with when assuming apparent density error less than 2%, conversely,
The error need to correct adjustment each material usage of match ratio when being more than or equal to 2%, finally appraise and decide the apparent density of the match ratio.
（5）Packing compact forming concrete sample, is covered with plastic foil, is placed on 20 ± 2 DEG C, in environment of the relative humidity more than 95%
The test specimen of the demoulding is placed on 20 ± 2 DEG C by maintenance to the demoulding, and maintenance extremely needs in moisture health-preserving chamber of the relative humidity more than 95%
Age, test each age strength.
（6）Other two kinds of match ratios of cement consumption are also tested by the above process, after each age strength is all completed, three
Assemble 28 days age strengths of composition and division in a proportion to be contrasted, choose Workable, intensity is high, integrated cost reckling coordinates as benchmark
Than.
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| CN107500658A (en) * | 2017-09-23 | 2017-12-22 | 四川省三台县波特兰商品砼有限公司 | A kind of matching method of closely knit concrete |
| CN108218322A (en) * | 2018-02-07 | 2018-06-29 | 昆山申昆联合混凝土有限公司 | A kind of C80 high cast exempt vibration self close-grained tests and its construction technology |
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| CN115906316A (en) * | 2022-11-21 | 2023-04-04 | 江苏科技大学 | Core-shell carrier design and preparation method without negative mechanical influence on matrix |
| CN117383898A (en) * | 2023-12-12 | 2024-01-12 | 河北省建筑科学研究院有限公司 | Full-solid waste concrete mixing proportion design method |
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| CN107500658A (en) * | 2017-09-23 | 2017-12-22 | 四川省三台县波特兰商品砼有限公司 | A kind of matching method of closely knit concrete |
| CN107500658B (en) * | 2017-09-23 | 2021-04-06 | 四川省三台县波特兰商品砼有限公司 | Proportioning method of dense concrete |
| CN108218322A (en) * | 2018-02-07 | 2018-06-29 | 昆山申昆联合混凝土有限公司 | A kind of C80 high cast exempt vibration self close-grained tests and its construction technology |
| CN108218322B (en) * | 2018-02-07 | 2020-10-16 | 昆山申昆联合混凝土有限公司 | C80 high-cast vibration-free self-compacting concrete and construction process thereof |
| CN108529966A (en) * | 2018-04-20 | 2018-09-14 | 中建五局土木工程有限公司 | Seepage control and crack resistance pump concrete component design method and pouring molding method |
| CN110342886A (en) * | 2019-08-06 | 2019-10-18 | 中国建筑材料科学研究总院有限公司 | A kind of high-strength machine-made sand concrete and preparation method thereof |
| CN111999202A (en) * | 2020-08-24 | 2020-11-27 | 河海大学 | Device and method for rapidly testing water-cement ratio of fresh concrete |
| CN115906316A (en) * | 2022-11-21 | 2023-04-04 | 江苏科技大学 | Core-shell carrier design and preparation method without negative mechanical influence on matrix |
| CN115906316B (en) * | 2022-11-21 | 2023-09-22 | 江苏科技大学 | Design and preparation method of core-shell carrier without negative mechanical influence on matrix |
| CN117383898A (en) * | 2023-12-12 | 2024-01-12 | 河北省建筑科学研究院有限公司 | Full-solid waste concrete mixing proportion design method |
| CN117383898B (en) * | 2023-12-12 | 2024-02-20 | 河北省建筑科学研究院有限公司 | Full-solid waste concrete mixing proportion design method |
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