CN106747020A - C100 design of mix proportion of high performance concrete and stirring means - Google Patents
C100 design of mix proportion of high performance concrete and stirring means Download PDFInfo
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- CN106747020A CN106747020A CN201710049976.1A CN201710049976A CN106747020A CN 106747020 A CN106747020 A CN 106747020A CN 201710049976 A CN201710049976 A CN 201710049976A CN 106747020 A CN106747020 A CN 106747020A
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/003—Methods for mixing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/003—Methods for mixing
- B28C5/006—Methods for mixing involving mechanical aspects
-
- 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
Abstract
A kind of C100 high performance concretes and cooperation stirring means.Traditional mix Design follows Bolomey's formula, i.e. concrete strength and ratio of mud relational expression, and in the match ratio, the ratio of mud is obtained by theoretical calculation.A kind of C100 design of mix proportion of high performance concrete and stirring means, its composition include：Coarse aggregate, fine aggregate, cement, additive, mineral admixture and mixing water, described mix-design and stirring means is divided into four steps to be carried out：（1）The match ratio preparatory stage；（2）Each composition material quality requirement of match ratio；（3）Determine the folk prescription material usage stage according to match ratio；（4）The match ratio trial mix stage.The present application relates to civil engineering compounding art, more particularly to it is applied to C100 high performance concretes and coordinates stirring means.
Description
Technical field：
The present application relates to a kind of civil engineering compounding art, more particularly to a kind of C100 high performance concretes cooperation and stirring side
Method.
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, and the match ratio sets
Meter trial process is extremely cumbersome, and success rate is very low, in the urgent need to one kind has high fluidity, high volume stability, suitable in construction
Suitable intensity and the concrete of high-durability.The concrete is by cement, mineral admixture（With flyash, ground granulated blast furnace ore deposit
Ground-slag and silicon ash etc. are representative）At least six kinds component compositions such as water, coarse aggregate and fine aggregate, additive, this is a kind of new mixed
Solidifying soil, is very different with traditional concrete.
The content of the invention：
It is an object of the invention to provide a kind of C100 high performance concretes and cooperation stirring means.
Above-mentioned purpose is realized by following technical scheme：
A kind of C100 high performance concretes, its composition includes：Coarse aggregate, fine aggregate, cement, additive, mineral admixture and mix
Water is shared, described mix-design and stirring means is divided into four steps to be carried out：（1）The match ratio preparatory stage；（2）Match ratio
Each composition material quality requirement；（3）Determine the folk prescription material usage stage according to match ratio；（4）The match ratio trial mix stage.
Described C100 high performance concretes, the described match ratio preparatory stage includes：Determine the concrete strength of trial,
C100 grades of concrete optimum intensity can be by 110MPa controls.
Described C100 high performance concretes, each composition material quality requirement of described match ratio is：A. coarse aggregate：
C100 concrete coarse aggregate nominal maximum particle diameter is not preferably greater than 16.0mm, wherein 5% is preferably less than more than 16.0mm Stones,
Broken or impact crushing rubble should be hammered into shape from continuous grading, must not crush rubble, the preferably preferred basalt of rubble masterbatch, peace using Hubei Province formula
The rocks such as mountain rock, its uniaxial compressive strength is preferably greater than 150MPa, and rubble crush values are preferably less than 3%, and elongated particles are preferably less than 2%,
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 2.80g/cm3, other are harmful miscellaneous
Matter content is less than respective standard setting；B. fine aggregate：Preferential to select II area's river sand, the modulus of fineness of sand is preferably 2.6~3.2,
Clay content is preferably less than 0.5%, and apparent density is preferably greater than 2.80 g/cm3, loose bulk density is preferably greater than 1600kg/m3If, workability
Meet construction requirement, it is also possible to from clean Machine-made Sand；C. cement：Preferentially select portland cement, 28 days rupture strengths of cement
Preferably greater than 9.0 MPa, compression strength is preferably greater than 60.0 MPa；D. additive：Preferentially select high-performance water reducing agent, representative product
It is polycarboxylate system to plant；E. mineral admixture：I grade of flyash is preferentially selected, S105 grades of ground granulated blast furnace slag is preferentially selected
The mineral admixtures such as powder, should fill SILICA FUME, and dioxide-containing silica is preferably greater than 95%；F. mixing water：Preferentially select drinking water
Mixing concrete, it is also possible to use the water at other water sources for meeting JGJ63-2006 standards.
Described C100 high performance concretes, described determines that the folk prescription material usage stage is according to match ratio：（1）C100 is high
Performance concrete need to use two or more Binder Materials, it is contemplated that image is accurate, and this match ratio is grey by traditional water
Than renaming as water-cement ratio；（2）According to engineering experience, the water-cement ratio of C100 high performance concretes preferably control 0.15~0.20 it
Between, specific value standard is：Composition concrete raw material quality better, water-cement ratio can take large values；Conversely, concrete raw material quality
Poor, water-cement ratio preferably gets the small value, and in a word, no matter composition concrete raw material quality, water-binder ratio takes smaller value, more
It is readily available the trial strength of requirement, it is easier to meet life requirement；（3）In the premise that material property and quality determine
Under, according to historical data and experience, the size of expected water-cement ratio is tentatively drafted, but the glue drafted in advance is not exceeded during trial mix
Than；（4）Determine the various material usages of a cubic meter of concrete by assuming that apparent density method is calculated；（a）It is assumed that C100 high-performance is mixed
Solidifying soil apparent density is 2500 ± 50 kg/m3, when fresh concrete actual measurement apparent density and its error are within ± 2%, can not
Amendment, otherwise, reply apparent density is modified；（b）Cement folk prescription consumption.Detection is combined according to actual cement strength and is constructed
Experience is drafted, and C100 concrete mixs can use 460kg~500kg；（c）Flyash folk prescription consumption.Ring is used according to match ratio
Border, position, flyash quality, user may be selected flyash to limitations affect factors such as the different requirements of each age strength of concrete
Volume account for the 8%~15% of Binder Materials；（d）Ground granulated blast furnace slag powders folk prescription consumption, according to match ratio use environment, portion
Position, ground granulated blast furnace slag powders quality, user may be selected to limitations affect factors such as the different requirements of each age strength of concrete
The volume of ground granulated blast furnace slag powders accounts for the 15%~25% of Binder Materials；（e）The volume of SILICA FUME is preferably 8%~15%；（f）Ore deposit
Polymer blends material total amount is preferably between the 30%~40% of binder total amount；（g）（c）~（e）Mineral admixture can be according to construction need
One or several are mixed, but is also not limited to these three, the mineral admixture of other kinds also may be selected through pass the test；
（h）Sand coarse aggregate ratio determines that the level according to sand is matched somebody with somebody, modulus of fineness, coarse aggregate maximum particle diameter, water-cement ratio, requirement of engineering, concrete fortune
Defeated, mode of movement different choice sand coarse aggregate ratio, typically can use 33%~40%；（i）The determination of folk prescription water consumption, according to the cement drafted
Consumption and water-cement ratio, calculate folk prescription water consumption；（j）After each material usage determines above, thick, fine aggregate consumption can be calculated；（k）
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 constructed, transported, pouring and apply
The slump that work needs determines its consumption, and research on maximum utilized quantity is not to be exceeded 5%；（5）Each strength grade concrete selects three kinds of differences
Cement consumption trial mix concrete, differs 20kg between every kind of different cement consumptions, control workability is constant, with last actual used water
Amount inverse water-cement ratio, certainly must be by water-cement ratio control within expection during operation, and this kind of way is easily grasped, and success rate is high,
Control water-cement ratio is the core of this way, meets the target that workability is this way, and fresh concrete workability and the slump are passed through
When loss meet and require after, three kinds of different mixture ratios of packing compact forming make a strength test, and each age strength are tested, with resistance to compression in 28 days
Intensity meets trial strength requirement, and cement and other Binder Materials sum cost the lowests as benchmark match ratio；（6）Press
Folk prescription raw material usage, expected water-cement ratio determined above, different match ratios 25~35 liters of concrete of equal trial mix are used to check
Concrete mix workability and intensity.
The stirring means of described C100 high performance concretes, described match ratio trial mix stage, the stirring of its concrete ratio
Technique is：（1）During load weighted coarse aggregate, fine aggregate sequentially added into mixer, 15s is stirred, be subsequently adding 65%
Water, stirs 25~35 s, adds cement and admixture, stirs 40~60s, adds 25% water and high-performance water reducing agent, stirring 90
~120s, observes concrete workability while stirring, if concrete flowability is small, adds remaining 10% water；If concrete flows
Property is still small, then continuously add 0.2%~0.5% high-performance water reducing agent（If concrete coagulating time, outward appearance are normal, and
On the premise of not influenceing its intensity, it is also possible to properly increase additive mix ratio, so that strict control water-cement ratio is without departing from pre-
Time value）, continue 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 not
Meet and require, then need to consider the consistency problem of high-performance water reducing agent and cement first, secondly consider with other Binder Materials with
High-performance water reducing agent consistency problem or the quality problems gathered materials（Surface characteristics and clean level etc.）；Conversely, the use being computed
Water shows a small surplus and the workability of concrete fully meets construction needs, and this is optimal result；（3）Stirring is examined after finishing
Survey the workability of fresh concrete, meet be put into after requiring in lidded container static a period of time detection concrete slump through when
Loss, this index finally appraises and decides water-cement ratio after meeting requirement；（4）By the time interval determination of stirring, transport and Construction control
Slump Time losing of Large meet require after, determine concrete apparent density, the density with hypothesis apparent density error be less than
Each material usage of match ratio can not be adjusted when 2%, conversely, the error need to correct adjustment each material of match ratio when being more than or equal to 2% using
Amount, finally appraises and decides 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, relative humidity is conserved to the demoulding in the environment more than 95%, and the test specimen of the demoulding is placed on into 20 ± 2 DEG C, and relative humidity is more than
Maintenance tests each age strength to the age for needing in 95% moisture health-preserving chamber；（6）Other two kinds of match ratios of cement consumption
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 is contrasted, selected
Workable is taken, intensity is high, integrated cost reckling is used as benchmark match ratio.
Described C100 design of mix proportion of high performance concrete and stirring means, the equipment for being used are forced for Double-horizontal-shaft concrete
Mixer, and ensure during described match ratio trial mix, it is ensured that actual water-cement ratio is not more than expected water-cement ratio.
Beneficial effects of the present invention：
1. C100 high performance concretes of the invention, intensity is high, and composition material is wide in variety, and intensity effect factor is more, many strong
In degree influence factor, the ratio of mud holds pride of place, therefore, when mix-design is carried out to this kind of concrete, if using theory
Calculate the determination ratio of mud and be then difficult to make.
C100 high performance concretes of the invention, are that conventional concrete mixing proportion design method is overturned, its core body
The determination system experience of the present ratio of mud drafts value, and rather than calculated value, in other words, the ratio of mud of high performance concrete is not theoretical
Calculate, concrete mix is nor only by calculating and design the simple problem that can just solve, but pass through in practice
On the basis of testing accumulation and constantly summarizing, an expected ratio of mud is drafted in advance, the value is must not exceed during trial, be combined with and be directed to
Property, it is directive it is a series of it is rigorous experiment and obtain practicality conclusion.
C100 high performance concretes of the invention, the mix Design process carried out as core is simply bright
, success rate is very high, and cost performance is of great satisfaction.
C100 high performance concretes of the invention, prove through a large amount of engineering practices, and the present invention is novel, with very strong operation
Property and practicality.
Specific embodiment：
Embodiment 1：
A kind of C100 high performance concretes, its composition includes：Coarse aggregate, fine aggregate, cement, additive, mineral admixture and mix
Water is shared, described mix-design and stirring means is divided into four steps to be carried out：（1）The match ratio preparatory stage；（2）Match ratio
Each composition material quality requirement；（3）Determine the folk prescription material usage stage according to match ratio；（4）The match ratio trial mix stage.
Embodiment 2：
C100 high performance concretes according to embodiment 1, the described match ratio preparatory stage includes：Determine the coagulation of trial
Native intensity, C100 grades of concrete optimum intensity can be by 110MPa controls.
Embodiment 3：
C100 high performance concretes according to embodiment 1, each composition material quality requirement of described match ratio is：A. it is thick
Gather materials：C100 concrete coarse aggregate nominal maximum particle diameter is not preferably greater than 16.0mm, wherein preferably small more than 16.0mm Stones
In 5%, broken or impact crushing rubble should be hammered into shape from continuous grading, rubble, the preferably preferred Black Warrior of rubble masterbatch must not be crushed using Hubei Province formula
The rocks such as rock, andesite, its uniaxial compressive strength is preferably greater than 150MPa, and rubble crush values are preferably less than 3%, and elongated particles are preferably small
In 2%, 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 2.80g/cm3, other have
Evil impurity content is less than respective standard setting；B. fine aggregate：It is preferential to select II area's river sand, the modulus of fineness of sand is preferably 2.6~
3.2, clay content is preferably less than 0.5%, and apparent density is preferably greater than 2.80 g/cm3, loose bulk density is preferably greater than 1600kg/m3If, and
Easy sexual satisfaction construction requirement, it is also possible to from clean Machine-made Sand；C. cement：Preferentially select portland cement, 28 days anti-foldings of cement
Intensity is preferably greater than 9.0 MPa, and compression strength is preferably greater than 60.0 MPa；D. additive：High-performance water reducing agent preferentially is selected, is represented
Property kind be polycarboxylate system；E. mineral admixture：I grade of flyash is preferentially selected, S105 grades of ground granulated blast furnace is preferentially selected
The mineral admixtures such as slag powders, should fill SILICA FUME, and dioxide-containing silica is preferably greater than 95%；F. mixing water：It is preferential to select drink
With water mixing concrete, it is also possible to use the water at other water sources for meeting JGJ63-2006 standards.
Embodiment 4：
C100 high performance concretes according to embodiment 1, described determines that the folk prescription material usage stage is according to match ratio：
（1）C100 high performance concretes need to use two or more Binder Materials, it is contemplated that image is accurate, and this match ratio is by traditional sense
On the ratio of mud rename as water-cement ratio；（2）According to engineering experience, the water-cement ratio of C100 high performance concretes preferably controls 0.15~
Between 0.20, specific value standard is：Composition concrete raw material quality better, water-cement ratio can take large values；Conversely, concrete former material
Material inferior quality, water-cement ratio preferably gets the small value, in a word, no matter composition concrete raw material quality, water-binder ratio take compared with
Small value, it is easier to obtain desired trial strength, it is easier to meet life requirement；（3）Determine in material property and quality
On the premise of, according to historical data and experience, the size of expected water-cement ratio is tentatively drafted, but do not exceeded during trial mix and draft in advance
Water-cement ratio；（4）Determine the various material usages of a cubic meter of concrete by assuming that apparent density method is calculated；（a）It is assumed that C100 is high
Performance concrete apparent density is 2500 ± 50 kg/m3, fresh concrete actual measurement apparent density is with its error within ± 2%
When, can not correct, otherwise, reply apparent density is modified；（b）Cement folk prescription consumption, combines according to actual cement strength and examines
Survey and construction experience is drafted, C100 concrete mixs can use 460kg~500kg；（c）Flyash folk prescription consumption, according to cooperation
It is optional than use environment, position, flyash quality, user to limitations affect factors such as each age strength difference requirements of concrete
The volume for selecting flyash accounts for the 8%~15% of Binder Materials；（d）Ground granulated blast furnace slag powders folk prescription consumption, makes according to match ratio
With environment, position, ground granulated blast furnace slag powders quality, user it is different to each age strength of concrete require etc. limitations affect because
Element, the volume that ground granulated blast furnace slag powders may be selected accounts for the 15%~25% of Binder Materials；（e）The volume of SILICA FUME is preferably 8%~
15%；（f）Mineral admixture total amount is preferably between the 30%~40% of binder total amount；（g）（c）~（e）Mineral admixture can root
Need to mix one or several according to construction, but be also not limited to these three, the mineral of other kinds also may be selected through pass the test
Admixture；（h）Sand coarse aggregate ratio determines that the level according to sand matches 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%；（i）The determination of folk prescription water consumption, according to drafting
Cement consumption and water-cement ratio, calculate folk prescription water consumption；（j）After each material usage determines above, thick, fine aggregate can be calculated and used
Amount；（k）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, transport,
The slump that pouring construction needs determines its consumption, and research on maximum utilized quantity is not to be exceeded 5%；（5）Each strength grade concrete selection three
Different cement consumption trial mix concrete are planted, 20kg is differed between every kind of different cement consumptions, control workability is constant, with last real
Border water consumption inverse water-cement ratio, certainly must be by water-cement ratio control within expection during operation, and this kind of way is easily grasped, success
Rate is high, and control water-cement ratio is the core of this way, meets the target that workability is this way, fresh concrete workability and slump
After degree gradual loss meets requirement, three kinds of different mixture ratios of packing compact forming make a strength test, and each age strength are tested, with 28 days
Compression strength meets trial strength requirement, and cement and other Binder Materials sum cost the lowests as benchmark match ratio；
（6）By folk prescription raw material usage determined above, expected water-cement ratio, different match ratios 25~35 liters of concrete of equal trial mix are used
To check concrete mix workability and intensity.
Embodiment 5：
C100 high performance concrete stirring means according to embodiment 1, described match ratio trial mix stage, its concrete ratio
Stirring technique is：（1）During load weighted coarse aggregate, fine aggregate sequentially added into mixer, 15s is stirred, be subsequently adding
65% water, stirs 25~35 s, adds cement and admixture, stirs 40~60s, adds 25% water and high-performance water reducing agent,
90~120s of stirring, observes concrete workability while stirring, if concrete flowability is small, adds remaining 10% water；If coagulation
Native mobility is still small, then continuously add 0.2%~0.5% high-performance water reducing agent（If concrete coagulating time, outward appearance are just
Often, and on the premise of its intensity is not influenceed, it is also possible to properly increase additive mix ratio, so as to strict control water-cement ratio not
Surpass the expectation value）, continue to stir 90~120s, if concrete workability meets requiring, discharging carries out further work, finally
Actual used water amount is appraised and decided, water-cement ratio is appraised and decided, the water-cement ratio cannot be greater than the expected water-cement ratio drafted in advance；（2）If concrete and
Easy property is unsatisfactory for requiring, then needs to consider the consistency problem of high-performance water reducing agent and cement first, secondly considers and other gellings
Material and high-performance water reducing agent consistency problem or the quality problems gathered materials（Surface characteristics and clean level etc.）；Conversely, through meter
The water consumption of calculation shows a small surplus and the workability of concrete fully meets construction needs, and this is optimal result；（3）Stir
The workability of fresh concrete is detected after finishing, is met and be put into after requiring static a period of time detection Control Measures for Concrete Slump in lidded container
Degree gradual loss, this index finally appraises and decides water-cement ratio after meeting requirement；（4）Between the time by stirring, transport and Construction control
After the Slump Time losing of Large of measure meets requirement, the apparent density of concrete is determined, the density is missed with hypothesis apparent density
Each material usage of match ratio can not be adjusted when difference is less than 2%, conversely, it is each that adjustment match ratio need to be corrected when the error is more than or equal to 2%
Material usage, finally appraises and decides 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, relative humidity is conserved to the demoulding in the environment more than 95%, and the test specimen of the demoulding is placed on into 20 ± 2 DEG C, relative humidity
Maintenance tests each age strength to the age for needing in moisture health-preserving chamber more than 95%；（6）Other two kinds of cement consumptions are matched somebody with somebody
Composition and division in a proportion is 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 carry out it is right
Than, Workable is chosen, intensity is high, integrated cost reckling is used as benchmark match ratio.
Embodiment 6：
C100 high performance concrete stirring means according to embodiment 1 or 2 or 3 or 4 or 5, the equipment for being used is dual horizontal
Axle concrete forced stirrer, and ensure during described match ratio trial mix, it is ensured that actual water-cement ratio is not more than expected glue
Than.
Claims (5)
1. a kind of C100 high performance concretes, its composition includes：Coarse aggregate, fine aggregate, cement, additive, mineral admixture and
Mixing water, it is characterized in that：Described mix-design and stirring means is divided into four steps to be carried out：（1）Match ratio prepares rank
Section；（2）Each composition material quality requirement of match ratio；（3）Determine the folk prescription material usage stage according to match ratio；（4）Match ratio trial mix
Stage, the described match ratio preparatory stage includes：Determine the concrete strength of trial, C100 grades of concrete optimum intensity can be pressed
110MPa is controlled.
2. C100 high performance concretes according to claim 1, it is characterized in that：Each composition material quality of described match ratio
It is required that being：A. coarse aggregate：C100 concrete coarse aggregate nominal maximum particle diameter is not preferably greater than 16.0mm, wherein more than 16.0mm
Stone is preferably less than 5%, should be broken or impact crushing rubble from continuous grading hammer, must not crush rubble using Hubei Province formula, and rubble is female
The rocks such as material preferably preferred basalt, andesite, its uniaxial compressive strength is preferably greater than 150MPa, and rubble crush values are preferably less than 3%, pin
Sheet 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
2.80g/cm3, other objectionable impurities contents are less than respective standard setting；B. fine aggregate：It is preferential to select II area's river sand, sand
Modulus of fineness is preferably 2.6~3.2, and clay content is preferably less than 0.5%, and apparent density is preferably greater than 2.80 g/cm3, loose bulk density is preferably big
In 1600kg/m3If workability meets construction requirement, it is also possible to from clean Machine-made Sand；C. cement：Preferentially select silicic acid
Salt cement, 28 days rupture strengths of cement are preferably greater than 9.0 MPa, and compression strength is preferably greater than 60.0 MPa；D. additive：Preferential choosing
With high-performance water reducing agent, representative kind is polycarboxylate system；E. mineral admixture：Preferentially select I grade of flyash, preferential choosing
With mineral admixtures such as S105 grades of ground granulated blast furnace slag powders, SILICA FUME should be filled, dioxide-containing silica is preferably greater than 95%；F.
Mixing water：It is preferential to select drinking water mixing concrete, it is also possible to use the water at other water sources for meeting JGJ63-2006 standards.
3. C100 high performance concretes according to claim 1 and 2, it is characterized in that：Described determines folk prescription according to match ratio
The material usage stage is：（1）C100 high performance concretes need to use two or more Binder Materials, it is contemplated that image is accurate, this
The traditional ratio of mud is renamed as water-cement ratio by match ratio；（2）According to engineering experience, the glue of C100 high performance concretes
Than preferably controlling between 0.15~0.20, specific value standard is：Composition concrete raw material quality better, water-cement ratio is desirable big
Value；Conversely, concrete raw material inferior quality, water-cement ratio preferably gets the small value, in a word, no matter composition concrete raw material quality is such as
What, water-binder ratio takes smaller value, it is easier to obtain desired trial strength, it is easier to meet life requirement；（3）In original
On the premise of material property and quality determine, according to historical data and experience, the size of expected water-cement ratio, but trial mix are tentatively drafted
When do not exceed the water-cement ratio drafted in advance；（4）Determine the various materials of a cubic meter of concrete by assuming that apparent density method is calculated
Consumption；（a）It is assumed that C100 high performance concretes apparent density is 2500 ± 50 kg/m3, fresh concrete actual measurement apparent density with
When its error is within ± 2%, can not correct, otherwise, reply apparent density is modified；（b）Cement folk prescription consumption.According to water
Mud actual strength combines detection and construction experience is drafted, and C100 concrete mixs can use 460kg~500kg；（c）Flyash list
Square consumption.According to match ratio use environment, position, flyash quality, user to limits such as the different requirements of each age strength of concrete
Influence factor processed, the volume that flyash may be selected accounts for the 8%~15% of Binder Materials；（d）Ground granulated blast furnace slag powders folk prescription is used
Amount is different to each age strength of concrete according to match ratio use environment, position, ground granulated blast furnace slag powders quality, user
It is required that etc. limitations affect factor, the volume that ground granulated blast furnace slag powders may be selected accounts for the 15%~25% of Binder Materials；（e）Micro- silicon
The volume of powder is preferably 8%~15%；（f）Mineral admixture total amount is preferably between the 30%~40% of binder total amount；（g）（c）~
（e）Mineral admixture can need to mix one or several according to construction, but be also not limited to these three, also optional through pass the test
Select the mineral admixture of other kinds；（h）Sand coarse aggregate ratio determines that the level according to sand is matched somebody with somebody, modulus of fineness, coarse aggregate maximum particle diameter, water
Glue typically can use 33%~40% than, the different choice sand coarse aggregate ratio of requirement of engineering, concrete transportation, mode of movement；（i）Folk prescription water
The determination of amount, according to the cement consumption and water-cement ratio drafted, calculates folk prescription water consumption；（j）After each material usage determines above,
Thick, fine aggregate consumption can be calculated；（k）The determination of high-performance water reducing agent consumption, according to the water-reducing rate of high-performance water reducing agent, drafts
Water-cement ratio, the slump that construction, transport, pouring construction need determines its consumption, and research on maximum utilized quantity is not to be exceeded 5%；（5）Each is strong
Degree grade concrete selects three kinds of different cement consumption trial mix concrete, and 20kg is differed between every kind of different cement consumptions, controls
Workability is constant, with last actual used water amount inverse water-cement ratio, must be controlled within expection water-cement ratio during operation certainly,
This kind of way is easily grasped, and success rate is high, and control water-cement ratio is the core of this way, meets the target that workability is this way, newly
After mixed concrete workability and Slump Time losing of Large meet requirement, three kinds of different mixture ratios of packing compact forming make a strength test,
Each age strength is tested, trial strength requirement, and cement and other Binder Materials sum costs were met with 28 days compression strength
The lowest is used as benchmark match ratio；（6）By folk prescription raw material usage determined above, expected water-cement ratio, different match ratios is equal
25~35 liters of concrete of trial mix, are used to check concrete mix workability and intensity.
4. cooperation, stirring means of a kind of one of claim 1-3 described C100 high performance concretes, it is characterized in that：It is described
The match ratio trial mix stage, its concrete ratio stirring technique is：（1）Load weighted coarse aggregate, fine aggregate are sequentially added
Enter in mixer, stir 15s, be subsequently adding 65% water, stir 25~35 s, add cement and admixture, stir 40~60s,
25% water and high-performance water reducing agent is added, 90~120s is stirred, concrete workability is observed while stirring, if concrete flows
Property is small, then add remaining 10% water；If concrete flowability is still small, 0.2%~0.5% high-performance water reducing agent is continuously added（Such as
Fruit concrete coagulating time, outward appearance are normal, and on the premise of its intensity is not influenceed, it is also possible to properly increase additive admixture
Ratio, so that strict control water-cement ratio is without departing from desired value）, continue to stir 90~120s, if concrete workability meets requiring,
Then discharging carries out further work, finally appraises and decides actual used water amount, appraises and decides water-cement ratio, and the water-cement ratio cannot be greater than what is drafted in advance
Expected water-cement ratio；（2）If concrete workability is unsatisfactory for requiring, need to consider the compatibility of high-performance water reducing agent and cement first
Problem, secondly considers and other Binder Materials and high-performance water reducing agent consistency problem or the quality problems gathered materials（Surface characteristics
With clean level etc.）；Conversely, the water consumption being computed show a small surplus and the workability of concrete fully meet construction needs, this
It is optimal result；（3）Stirring detects the workability of fresh concrete after finishing, meet and be put into after requiring quiet in lidded container
Only a period of time detection concrete slump gradual loss, finally water-cement ratio is appraised and decided after the satisfaction requirement of this index；（4）By stirring
Mix, transport and Construction control time interval determination Slump Time losing of Large meet require after, determine concrete it is apparent close
Degree, the density with assume that when apparent density error is less than 2% each material usage of match ratio can not be adjusted, conversely, the error more than etc.
Adjustment each material usage of match ratio need to be corrected when 2%, the apparent density of the match ratio is finally appraised and decided；（5）Packing compact forming concrete
Test specimen, is covered with plastic foil, is placed on 20 ± 2 DEG C, and relative humidity is conserved to the demoulding in the environment more than 95%, by the examination of the demoulding
Part is placed on 20 ± 2 DEG C, and maintenance tests each age strength to the age for needing in moisture health-preserving chamber of the relative humidity more than 95%；
（6）Other two kinds of match ratios of cement consumption are also tested by the above process, and after each age strength is all completed, three assemble
28 days age strengths of composition and division in a proportion are contrasted, and choose Workable, and intensity is high, integrated cost reckling is used as benchmark match ratio.
5. cooperation, stirring means of C100 high performance concretes according to claim 4, it is characterized in that：What is used sets
Standby is Double-horizontal-shaft concrete forced stirrer, and is ensured during described match ratio trial mix, it is ensured that actual water-cement ratio is not more than pre-
The water-cement ratio of phase.
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Cited By (7)
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| 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 |
| CN108818924A (en) * | 2018-06-07 | 2018-11-16 | 中铁二局第工程有限公司 | A kind of preparation method mixing sand concrete |
| CN110451891A (en) * | 2019-08-27 | 2019-11-15 | 黑龙江盛世新宇高新技术开发有限公司 | Light high strength concrete mixing proportion design method |
| CN111735938A (en) * | 2020-08-03 | 2020-10-02 | 赖志标 | Premixed concrete quality monitoring and early warning method and system |
| CN112341095A (en) * | 2020-11-19 | 2021-02-09 | 中建八局第三建设有限公司 | High-strength consolidation body cementing material mixing proportion design method |
| CN114505953A (en) * | 2022-01-19 | 2022-05-17 | 中交公路长大桥建设国家工程研究中心有限公司 | Method for industrially producing ultra-high performance concrete |
| CN115519670A (en) * | 2022-10-20 | 2022-12-27 | 大庆长垣能源科技有限公司 | Preparation process of tough-elastic cement slurry for gas storage well cementation |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108818924A (en) * | 2018-06-07 | 2018-11-16 | 中铁二局第工程有限公司 | A kind of preparation method mixing sand concrete |
| CN110451891A (en) * | 2019-08-27 | 2019-11-15 | 黑龙江盛世新宇高新技术开发有限公司 | Light high strength concrete mixing proportion design method |
| CN111735938A (en) * | 2020-08-03 | 2020-10-02 | 赖志标 | Premixed concrete quality monitoring and early warning method and system |
| CN112341095A (en) * | 2020-11-19 | 2021-02-09 | 中建八局第三建设有限公司 | High-strength consolidation body cementing material mixing proportion design method |
| CN114505953A (en) * | 2022-01-19 | 2022-05-17 | 中交公路长大桥建设国家工程研究中心有限公司 | Method for industrially producing ultra-high performance concrete |
| CN115519670A (en) * | 2022-10-20 | 2022-12-27 | 大庆长垣能源科技有限公司 | Preparation process of tough-elastic cement slurry for gas storage well cementation |
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