CN112185485B - Design method for mixing proportion of space two-phase concrete - Google Patents

Design method for mixing proportion of space two-phase concrete Download PDF

Info

Publication number
CN112185485B
CN112185485B CN202011013563.6A CN202011013563A CN112185485B CN 112185485 B CN112185485 B CN 112185485B CN 202011013563 A CN202011013563 A CN 202011013563A CN 112185485 B CN112185485 B CN 112185485B
Authority
CN
China
Prior art keywords
strength
mortar
concrete
relation
ratio
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202011013563.6A
Other languages
Chinese (zh)
Other versions
CN112185485A (en
Inventor
杨海峰
蒋家盛
甘麟雄
杨超
邓志恒
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangxi University
Original Assignee
Guangxi University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangxi University filed Critical Guangxi University
Priority to CN202011013563.6A priority Critical patent/CN112185485B/en
Publication of CN112185485A publication Critical patent/CN112185485A/en
Application granted granted Critical
Publication of CN112185485B publication Critical patent/CN112185485B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • G—PHYSICS
    • G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16C—COMPUTATIONAL CHEMISTRY; CHEMOINFORMATICS; COMPUTATIONAL MATERIALS SCIENCE
    • G16C60/00—Computational materials science, i.e. ICT specially adapted for investigating the physical or chemical properties of materials or phenomena associated with their design, synthesis, processing, characterisation or utilisation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Abstract

The invention discloses a design method of a space two-phase concrete mix proportion, which relates to the technical field of concrete mix proportion calculation, and the method simplifies a concrete model into space-distributed coarse aggregate and mortar filled among gaps of the coarse aggregate, wherein the strength of the concrete is simplified to be composed of the space-distributed strength of the coarse aggregate and the hardening strength of a mortar body, and in the space two-phase concrete model, the concrete strength, the mortar strength and the materials have the following three relations: a coated rice relationship, a mortar strength relationship and a coarse aggregate spatial distribution strength relationship. The influence of the type of the coarse aggregate and the distribution thereof on the strength of the concrete is considered through the spatial distribution strength of the coarse aggregate, and the method is suitable for the strength design method of the concrete adopting different types of coarse aggregates.

Description

Design method for mixing proportion of space two-phase concrete
Technical Field
The invention relates to a concrete mix proportion calculating method, in particular to a space two-phase concrete mix proportion designing method.
Background
The traditional concrete mixing proportion design method is only based on a coated rice relation and a volume method, and the mixing proportion amount of each material of the concrete is determined according to experience, however, the coated rice relation only considers the influence of the amount of water and cement on the strength of the concrete, and does not consider the contribution and influence of the coarse aggregate type and the distribution thereof on the strength of the concrete.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a concrete mix proportion design method suitable for adopting different types of coarse aggregates, which specifically adopts the following technical scheme:
a design method of a space two-phase concrete mix proportion simplifies a concrete model into coarse aggregates which are spatially distributed and mortar filled among gaps of the coarse aggregates, the strength of the concrete is simplified to be composed of the spatial distribution strength of the coarse aggregates and the hardening strength of mortar, and the strength formula of the concrete material is as follows:
f cu,o ＝f m ×(1-γ V )+f gk ×γ V (1-1) wherein f cu,o The unit is the target strength of the concrete: MPa; f (f) m Is a measured value of 28-day cubic compressive strength of mortar material, and is singleBit MPa; f (f) gk The spatial distribution strength of the coarse aggregate is as follows: MPa; gamma ray V Gamma, the volume occupancy of coarse aggregate in concrete space per unit volume V ＝G/ρ G (1-2) being dimensionless units; G. ρ G The concrete total coarse aggregate consumption and coarse aggregate density in unit volume are respectively as follows: kg/m 3 。
Further, the method comprises the following steps:
step 1: setting target strength of concrete: f (f) cu,o ＝f cu,k +1.645×σ (1-3), where f cu,k Is the standard strength value of concrete, and is expressed in MPa; sigma is the standard deviation of the concrete strength, and the value of sigma refers to the common concrete mix proportion design rule, unit MPa;
step 2: establishing a concrete covered rice relation: f (f) cu,o ＝a 0 ×(W/C)+b 0 (1-4) wherein W/C is the water-ash dosage ratio, a 0 、b 0 Regression coefficient of actual measurement data fitting (regression correlation coefficient R 2 Preferably 0.90 or more);
step 3: establishing a mortar strength relation: the sand strength relation is a mortar strength-mortar ratio relation or a mortar strength-mortar ratio relation, and the calculation formula is as follows:
Figure GDA0002772381320000021
or->
Figure GDA0002772381320000022
The formula (1-5 a) represents the relation between the mortar strength and the mortar ratio, the formula (1-5 b) represents the relation between the mortar strength and the mortar ratio, S represents the amount of sand, and the unit is kg/m 3 ，a 1 、a 2 、b 1 、b 2 For fitting regression coefficients (regression correlation coefficient R 2 Preferably 0.90 or more);
step 4: establishing a coarse aggregate spatial distribution strength relation: the modification of the formula (1-1) can be carried out:
Figure GDA0002772381320000023
by measuring f cu,o And fm, obtaining f by inverse calculation of the formula 1-6 gk And fitting to find f gk And f cu,o The relation of (2) is:
f gk ＝a 3 ·f cu,o +b 3 (1-7) wherein f gk Is the space distribution strength of coarse aggregate, a 3 、b 3 Fitting regression coefficients (regression correlation coefficients are preferably 0.90 or more);
step 5: fitting concrete and mortar cubes and testing the strength of the concrete and mortar cubes to determine regression coefficients: a, a 0 、a 1 、a 2 、a 3 、b 0 、b 1 、b 2 、b 3 ；
Step 6: according to the set slump, the net water consumption W is determined according to the common concrete mix proportion design rule and the actual measured aggregate particle diameter, and the unit is kg/m 3 ；
Step 7: the volume method is used for calculating the mixing ratio of the consumption of each material:
Figure GDA0002772381320000031
wherein ρ is C 、ρ S 、ρ G 、ρ W The density of cement, fine aggregate, coarse aggregate and water is respectively expressed in kg/m 3 ；W Z Is the total water consumption, the unit is kg/m 3 ，W Z ＝W+W f ，W f For adding water, when using common natural aggregate, W f =0, additional water is preferably considered when using coarse aggregates with a water absorption of more than 4% for one hour, W f ＝γ 1h Xh, unit kg/m 3 ；γ 1h The water absorption rate of the coarse aggregate is one hour; alpha is the gas content percentage of the concrete, and the value of alpha can be 1 when an air entraining agent or an air entraining additive is not used;
step 8: according to the relation established in the steps, establishing the following linear equation system to solve:
Figure GDA0002772381320000032
further, the step of determining the regression coefficients is:
step 1: setting at least 3 groups of different water-cement ratios according to gradients, preparing concrete cube test blocks with the size of 100mm multiplied by 100mm, performing a concrete uniaxial compression test, measuring the compressive strength of the concrete cube for 28 days, fitting and regressing the water-cement ratio in each group of data and the measured compressive strength value by adopting the formula (1-4), and obtaining a 0 、b 0 Correlation coefficient R 2 ；
Step 2: setting at least 3 groups of different mortar ratios and mortar ratios according to gradients, preparing a mortar cube test block with the size of 100mm multiplied by 100mm, performing a uniaxial compression test, measuring the compressive strength of the mortar cube for 28 days, drawing a scatter diagram by taking the numerical value of the mortar ratio or the mortar ratio as an abscissa and taking the measured compressive strength value as an ordinate, fitting and regressing by adopting a formula (1-5 a) or a formula (1-5 b) to obtain a 1 、b 1 Or a 2 、b 2 Correlation coefficient R 2 ；
If R in the relation of mortar strength and mortar ratio 2 Higher than R in relation of mortar strength and sand-lime ratio 2 Then adopting the formula (1-5 a) and a 1 、b 1 ；
If R in relation of mortar strength and sand-lime ratio 2 Higher than R in the relation of mortar strength and mortar ratio 2 Then adopting the formula (1-5 b) and a 2 、b 2 ；
Step 3: the coarse aggregate amount G used in the step 1 and the measured compressive strength f of the concrete cube cu,o And the compressive strength f of the mortar cube measured in the step 2 m Substituting into (1-6) to obtain the coarse aggregate spatial distribution strength f of the concrete gk Will f cu,o And f gk Fitting regression is performed by adopting the formula (1-6) to obtain a 3 、b 3 。
Further, in the step 3, mineral admixture is doped during preparation, and the calculated formula of the mortar strength relation is as follows: mortar strength-mortar ratio relationship:
Figure GDA0002772381320000041
or sandSlurry strength-sand-lime ratio relationship:
Figure GDA0002772381320000042
wherein J is the amount of mineral admixture, and the unit is kg/m 3 The value can be obtained by referring to the rule of design of common concrete proportion revised recently in China, or obtained empirically according to the existing research data.
In step 7, the mineral admixture is blended during the preparation, and the calculated formula of the calculated mixing ratio by using a volumetric method is as follows:
Figure GDA0002772381320000051
wherein ρ is J The density of the mineral admixture is expressed in kg/m 3 。
Further, in step 8, the linear equation set (1-9) may be rewritten in the form of a matrix, resulting in two expressions as follows:
Figure GDA0002772381320000052
or (b)
Figure GDA0002772381320000053
The beneficial effects of the invention are as follows: the method simplifies the concrete model into the space distribution coarse aggregate and mortar filled among the space distribution coarse aggregate, simplifies the concrete strength into the superposition of the space distribution strength of the coarse aggregate and the hardening strength of the mortar body, considers the contribution and influence of the coarse aggregate type and the distribution thereof to the concrete strength through the space distribution strength of the coarse aggregate, has clear physical and mechanical significance, and is suitable for the strength design method of the concrete adopting different types of coarse aggregates, including but not limited to common aggregate concrete, lightweight aggregate concrete and the like.
Drawings
FIG. 1 is a schematic diagram of a theoretical model of a spatial two-phase concrete;
the concrete of fig. 2 has a covered meter relationship;
mortar strength relationship of the mortar of fig. 3, wherein: FIG. 3 (a) shows the mortar specific strength relationship, and FIG. 3 (b) shows the mortar specific strength relationship;
FIG. 4 is a graph showing the spatial distribution strength relationship of coarse aggregate of concrete.
Detailed Description
The invention will now be described in detail with reference to specific examples which will assist those skilled in the art in further understanding the invention, but which are not intended to limit the invention in any way.
In the following examples, coral and/or coral reef crushed stones were selected as aggregate to prepare concrete test blocks.
Embodiment one: trial and error to determine regression coefficients
Step 1, establishing a covered rice relation: concrete cubes with the dimensions of 100mm multiplied by 100mm are prepared according to different water cement ratios respectively, and are subjected to a concrete uniaxial compression test, and the compressive strength of the concrete cubes within 28 days is measured and recorded as follows:
TABLE 1-1 concrete mix ratio at trial stage and results
Figure GDA0002772381320000061
Figure GDA0002772381320000071
The compressive strength f is shown on the abscissa of W/C (water cement ratio) in Table 1-1 cu,o As the ordinate, a scatter diagram is drawn, and as shown in figure 2, a regression line is fitted to obtain a correlation coefficient R 2 0.99, a is taken from the regression line 0 ＝-93.33，b 0 =87.67, and substitution into formula (1-4) can be obtained: f (f) cu,o ＝-93.33×(W/C)+87.67(2-1)；
Step 2, establishing a mortar strength relation: mortar cube test blocks with the dimensions of 100mm multiplied by 100mm are prepared according to different mortar ratios respectively, a single-shaft mortar compression test is carried out, the compressive strength of a mortar material cube for 28 days is measured, and the following steps are recorded:
TABLE 1-2 mortar mix at trial formulation stage
Figure GDA0002772381320000072
S/(W+C) (mortar ratio), S/C (sand-lime ratio) in tables 1-2 are taken as abscissa, and compressive strength f is taken as m On the ordinate, a scatter diagram is drawn, regression lines are fitted and correlation coefficients are solved as shown in FIG. 3 (a) and FIG. 3 (b), R 2 0.98; from FIG. 3 (b), R 2 0.97. Since the goodness of fit in FIG. 3 (a) is high, a is taken from the regression line in FIG. 3 (a) 1 ＝-30.0，b 1 =91, and substitution into formula (1-5 a) can be obtained:
Figure GDA0002772381320000081
step 3, establishing a coarse aggregate spatial distribution strength relation:
the coarse aggregate dosage G used in the step 1 and the measured compressive strength f of the concrete cube cu,o And the compressive strength f of the mortar cube measured in the step 2 m Substituting into (1-6) to obtain the coarse aggregate spatial distribution strength f of the concrete gk At f cu， o is the abscissa, f gk Drawing a scatter diagram with ordinate, respectively fitting regression lines and obtaining correlation coefficients as shown in FIG. 4, and taking a from the regression lines 3 ＝0.84，b 3 = -15, substituting f into formula (1-7) to obtain f gk ＝0.84·f cu,o -15(2-3)。
Embodiment two:
selecting C25 concrete, i.e. f cu,k ＝25MPa。
1. Determining target intensity
The test uses a 100mm x 100mm cube test block, and when considering the size effect, calculating, the intensity of a cube converted into 150mm by 150mm should be divided by a factor of 0.95, i.e
f cu,o ＝(25+1.645×σ)/0.95＝(25+1.645×5)/0.95＝34.97MPa；
2. Referring to the existing research and early trial-and-preparation experience, according to slump and aggregate particle size requirements, under the condition that normal construction can be met, the value of the net water consumption is W=200 kg/m 3 ；
3. The cement amount C is determined, and the water consumption W=200 kg/m 3 Substituting (1-4) to obtain C=343 kg/m 3 ；
4. The following simultaneous equations are obtained by substituting the established mortar strength relation formula (2-2) and coarse aggregate space distribution strength relation formula (2-3) into the equation set of (1-9):
Figure GDA0002772381320000091
the overwriting in the form of a matrix can be achieved:
Figure GDA0002772381320000092
substituting regression coefficient obtained in example 1 into equation (2-5), solving the above equation to obtain cement amount C, sand amount S, coarse aggregate amount G, and additional water amount W f 。
And according to the dosage of the materials, preparing concrete cube test blocks with the dimensions of 100mm multiplied by 100mm, performing a concrete uniaxial compression test, and measuring the compressive strength of the concrete cube for 28 days.
Embodiment III:
selecting C30 concrete, i.e. f cu,k ＝30MPa。
1. Determining target intensity
The test uses a 100mm x 100mm cube test block, and when considering the size effect, calculating, the intensity of a cube converted into 150mm by 150mm should be divided by a factor of 0.95, i.e
f cu,o ＝(30+1.645×σ)/0.95＝(30+1.645×5)/0.95＝40.24MPa；
2. Ginseng radixBased on the existing research and early trial experience, according to slump and aggregate particle size requirements, the value of the net water consumption is W=200 kg/m under the condition of ensuring that normal construction can be met 3 ；
3. The cement amount C is determined, and the water consumption W=200 kg/m 3 Substituting (1-4) to obtain C=343 kg/m 3 ；
4. The following simultaneous equations are obtained by substituting the established mortar strength relation formula (2-2) and coarse aggregate space distribution strength relation formula (2-3) into the equation set of (1-9):
Figure GDA0002772381320000111
the overwriting in the form of a matrix can be achieved:
Figure GDA0002772381320000112
substituting regression coefficient obtained in example 1 into equation (2-7), solving the above equation to obtain cement amount C, sand amount S, coarse aggregate amount G, and additional water amount W f 。
And according to the dosage of the materials, preparing concrete cube test blocks with the dimensions of 100mm multiplied by 100mm, performing a concrete uniaxial compression test, and measuring the compressive strength of the concrete cube for 28 days.
Embodiment four:
selecting C35 concrete, i.e. f cu,k ＝35MPa。
1. Determining target intensity
The test uses a 100mm x 100mm cube test block, and when considering the size effect, calculating, the intensity of a cube converted into 150mm by 150mm should be divided by a factor of 0.95, i.e
f cu,o ＝(35+1.645×σ)/0.95＝(35+1.645×5)/0.95＝45.5MPa；
2. By referring to the existing research and early trial experience, the slump and aggregate particle size requirements can be metIn the case of construction, the net water consumption has a value of w=200 kg/m 3 ；
3. The cement amount C is determined, and the water consumption W=200 kg/m 3 Substituting (1-4) to obtain C=343 kg/m 3 ；
4. The following simultaneous equations are obtained by substituting the established mortar strength relation formula (2-2) and coarse aggregate space distribution strength relation formula (2-3) into the equation set of (1-9):
Figure GDA0002772381320000121
the overwriting in the form of a matrix can be achieved:
Figure GDA0002772381320000131
substituting regression coefficient obtained in example 1 into formula (2-9), solving the above equation to obtain cement amount C, sand amount S, coarse aggregate amount G, and additional water amount W f 。
And according to the dosage of the materials, preparing concrete cube test blocks with the dimensions of 100mm multiplied by 100mm, performing a concrete uniaxial compression test, and measuring the compressive strength of the concrete cube for 28 days.
Fifth embodiment:
this example is the verification example of examples 2-4.
The amounts of materials used and the compressive strength values measured in examples two, three and four were counted and recorded as in tables 1 to 3:
Figure GDA0002772381320000132
as can be seen from tables 1 to 3:
1. for C25 concrete, the compressive strength is 35.7MPa and is more than 34.97MPa of target strength;
2. for C30 concrete, the compressive strength is 41.5MPa and is more than the target strength of 40.24MPa;
3. for C35 concrete, the compressive strength is 45.6MPa and is larger than the target strength of 45.5MPa.
The concrete prepared by the mixing proportion design method can meet the requirement of concrete compressive strength design.

Claims (5)

1. A design method of a space two-phase concrete mixing proportion is characterized in that a concrete model is simplified into coarse aggregates which are spatially distributed and mortar filled among gaps of the coarse aggregates, the strength of the concrete is simplified to be composed of the spatially distributed strength of the coarse aggregates and the hardening strength of mortar bodies, and the strength formula of a concrete material is as follows:
f cu,o ＝f m ×(1-γ V )+f gk ×γ V (1-1) wherein f cu,o The unit is the target strength of the concrete: MPa; f (f) m The measured value of the 28-day cubic compressive strength of the mortar material is expressed in MPa; fgk the spatial distribution strength of coarse aggregate, unit: MPa; gamma ray V Gamma, the volume occupancy of coarse aggregate in concrete space per unit volume V ＝G/ρ G (1-2) being dimensionless units; G. ρ G The concrete is characterized by respectively comprising the following components in unit volume: kg/m 3 ；
The method comprises the following steps:
step 1: setting target strength of concrete: f (f) cu,o ＝f cu,k +1.645×σ (1-3), where f cu,k Is the standard strength value of concrete, and is expressed in MPa; sigma is the standard deviation of concrete strength, and the value of sigma refers to the design rule of common concrete mix proportion, and the unit is MPa;
step 2: establishing a concrete covered rice relation: f (f) cu,o ＝a 0 ×(W/C)+b 0 (1-4) wherein W/C is the water-ash dosage ratio, a 0 、b 0 Fitting regression coefficients to the measured data;
regression correlation coefficient R 2 0.90 or more;
step 3: establishing a mortar strength relation: the sand strength relation is a relation of mortar strength and mortar ratio or a relation of mortar strength and mortar ratioThe formula is:
Figure QLYQS_1
or->
Figure QLYQS_2
The formula (1-5 a) represents the relation between the mortar strength and the mortar ratio, the formula (1-5 b) represents the relation between the mortar strength and the mortar ratio, S represents the amount of sand, and the unit is kg/m 3 ，a 1 、a 2 、b 1 、b 2 Is a regression coefficient of fitting type; regression correlation coefficient R 2 0.90 or more;
step 4: establishing a coarse aggregate spatial distribution strength relation: the modification of the formula (1-1) can be carried out:
Figure QLYQS_3
by measuring f cu,o And f m F is obtained by back calculation from 1-6 gk And fitting to find f gk And f cu,o The relation of (2) is:
f gk ＝a 3 ·f cu,o +b 3 (1-7) wherein f gk Is the space distribution strength of coarse aggregate, a 3 、b 3 Fitting regression coefficients; the regression correlation coefficient is more than or equal to 0.90;
step 5: fitting concrete and mortar cubes and testing the strength of the concrete and mortar cubes to determine regression coefficients: a, a 0 、a 1 、a 2 、a 3 、b 0 、b 1 、b 2 、b 3 ；
Step 6: according to the set slump, the net water consumption W is determined according to the design rules of the common concrete mix proportion and the actual measured aggregate particle diameter, and the unit kg/m 3 ；
Step 7: the volume method is used for calculating the mixing ratio of the consumption of each material:
Figure QLYQS_4
wherein ρ is C 、ρ S 、ρ G 、ρ W The density of cement, fine aggregate, coarse aggregate and water is respectively expressed in kg/m 3 ；W Z Is the total water consumption, the unit is kg/m 3 ，W Z ＝W+W f ，W f For adding water, when using common natural aggregate, W f =0, additional water was considered when using coarse aggregates with a water absorption of more than 4% for one hour, W f ＝γ 1h Xh, unit kg/m 3 ；γ 1h The water absorption rate of the coarse aggregate is one hour; alpha is the gas content percentage of the concrete, and the value of alpha is 1 when an air entraining agent or an air entraining additive is not used;
step 8: according to the relation established in the steps, establishing the following linear equation system to solve:
Figure QLYQS_5
2. the method for designing a spatial two-phase concrete mix according to claim 1, wherein the step of determining regression coefficients is:
step 1: setting at least 3 groups of different water-cement ratios according to gradients, preparing concrete cube test blocks with the size of 100mm multiplied by 100mm, performing a concrete uniaxial compression test, measuring the compressive strength of the concrete cube for 28 days, performing fitting regression on the water-cement ratio in each group of data and the measured compressive strength value by adopting the formula (1-4), and obtaining a 0 、b 0 Correlation coefficient R 2 ；
Step 2: setting at least 3 groups of different mortar ratios and mortar ratios according to gradients, preparing a mortar cube test block with the size of 100mm multiplied by 100mm, performing a uniaxial compression test, measuring the compressive strength of the mortar cube for 28 days, drawing a scatter diagram by taking the numerical value of the mortar ratio or the mortar ratio as an abscissa and taking the measured compressive strength value as an ordinate, fitting regression by adopting (1-5 a) or (1-5 b) and obtaining a 1 、b 1 Or a 2 、b 2 Correlation coefficient R 2 ；
If R in the relation of mortar strength and mortar ratio 2 Higher than sandR in relation of slurry strength and sand-lime ratio 2 Then adopting the formula (1-5 a) and a 1 、b 1 ；
If R in relation of mortar strength and sand-lime ratio 2 Higher than R in the relation of mortar strength and mortar ratio 2 Then adopting the formula (1-5 b) and a 2 、b 2 ；
Step 3: the coarse aggregate amount G used in the step 1 and the measured compressive strength f of the concrete cube cu,o And the compressive strength f of the mortar cube measured in the step 2 m Substituting into (1-6) to obtain the coarse aggregate spatial distribution strength f of the concrete gk Will f cu，o And f gk Fitting with (1-6) to obtain a 3 、b 3 。
3. The method for designing a spatial two-phase concrete mix ratio according to claim 1, wherein in step 3, mineral admixture is added during the preparation, and the calculation formula of the mortar strength relation is as follows: mortar strength-mortar ratio relationship:
Figure QLYQS_6
or mortar strength-sand-lime ratio relationship: />
Figure QLYQS_7
Wherein J is the amount of mineral admixture, and the unit is kg/m 3 The values are either referred to the normal concrete mix design protocol or empirically based on existing research data.
4. The method for designing the mixing proportion of the space two-phase concrete according to claim 1, wherein in the step 7, mineral admixture is doped during the preparation, and the volumetric method is used as a calculation formula for calculating the mixing proportion, wherein the calculation formula is as follows:
Figure QLYQS_8
wherein ρ is J The density of the mineral admixture is expressed in kg/m 3 。
5. The method for designing the mixture ratio of the two-phase concrete in space according to claim 1, wherein in the step 8, the linear equation sets (1-9) can be rewritten in a matrix form to obtain two expressions as follows:
Figure QLYQS_9
or (b)
Figure QLYQS_10
CN202011013563.6A 2020-09-24 2020-09-24 Design method for mixing proportion of space two-phase concrete Active CN112185485B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011013563.6A CN112185485B (en) 2020-09-24 2020-09-24 Design method for mixing proportion of space two-phase concrete

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011013563.6A CN112185485B (en) 2020-09-24 2020-09-24 Design method for mixing proportion of space two-phase concrete

Publications (2)

Publication Number Publication Date
CN112185485A CN112185485A (en) 2021-01-05
CN112185485B true CN112185485B (en) 2023-07-07

Family

ID=73956094

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011013563.6A Active CN112185485B (en) 2020-09-24 2020-09-24 Design method for mixing proportion of space two-phase concrete

Country Status (1)

Country Link
CN (1) CN112185485B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104318069A (en) * 2014-09-30 2015-01-28 郑州大学 Method for determining recycled aggregate and concrete proportioning ratio
CN105622014A (en) * 2015-12-28 2016-06-01 郑州大学 Multi-strength regeneration brick aggregate fiber concrete and preparing method thereof
CN105844007A (en) * 2016-03-21 2016-08-10 深圳大学 Concrete mix proportion design method based on dual indexes including strength and chloride ion permeability
CN106777535A (en) * 2016-11-25 2017-05-31 深圳大学 Alkali-activated carbonatite mixture ratio design of recycled aggregate concrete method and system
CN111646741A (en) * 2020-06-28 2020-09-11 宁波新力建材科技有限公司 Iron ore special concrete and preparation method thereof

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7658797B2 (en) * 2005-03-22 2010-02-09 Nova Chemicals Inc. Lightweight concrete compositions

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104318069A (en) * 2014-09-30 2015-01-28 郑州大学 Method for determining recycled aggregate and concrete proportioning ratio
CN105622014A (en) * 2015-12-28 2016-06-01 郑州大学 Multi-strength regeneration brick aggregate fiber concrete and preparing method thereof
CN105844007A (en) * 2016-03-21 2016-08-10 深圳大学 Concrete mix proportion design method based on dual indexes including strength and chloride ion permeability
CN106777535A (en) * 2016-11-25 2017-05-31 深圳大学 Alkali-activated carbonatite mixture ratio design of recycled aggregate concrete method and system
CN111646741A (en) * 2020-06-28 2020-09-11 宁波新力建材科技有限公司 Iron ore special concrete and preparation method thereof

Also Published As

Publication number Publication date
CN112185485A (en) 2021-01-05

Similar Documents

Publication Publication Date Title
CN111205036B (en) High-strength lightweight concrete and preparation method thereof
CN100534743C (en) Confecting method of modern concrete and the mixing proportion thereof
CN111848026A (en) Alkali-activated nano-reinforced early-strength type ultrahigh-performance concrete and preparation method thereof
CN115028419B (en) Design method for self-compacting concrete mix proportion
CN109665769B (en) Super early-strength high-performance concrete and preparation method thereof
Xu et al. Effect of FA and GGBFS on compressive strength, rheology, and printing properties of cement-based 3D printing material
CN104926176B (en) Enhancing composition, enhancing pumping admixture for pumping admixture and its preparation method and application
Wang et al. Optimization of mix proportion of basic magnesium sulfate cement-based high-strength coral concrete
CN107827416A (en) A kind of high intensity radiation proof pumpable concrete and preparation method thereof
CN115376618A (en) Concrete mix proportion full-calculation design method based on quantitative analysis
CN110922122A (en) Low-hydration-heat high-strength volume concrete and preparation method thereof
CN114117793A (en) Large-volume concrete mix proportion design method based on hydration heat of mineral admixture
CN112185485B (en) Design method for mixing proportion of space two-phase concrete
CN112142398B (en) Quantitative design method for mix proportion of machine-made sand self-compacting concrete based on aggregate particle shape
CN110372320B (en) Phosphate cement mortar proportioning method
Kastornykh et al. Modified concrete mixes for monolithic construction
CN112851222B (en) Machine-made sand self-compacting concrete mix proportion design method based on establishment of optimal flowing system
Long et al. A study on the strength surplus coefficient of cement
CN117383898B (en) Full-solid waste concrete mixing proportion design method
JPH03261638A (en) Hydraulic cement
JPH0676235B2 (en) Hydraulic cement composition
Alkhaly et al. The Design of Reactive Powder Concrete (RPC) Mixtures Using Aceh Quartzite Powder
CN114822727A (en) Large-flow-state multi-component cement-based pumped concrete mix proportion design method
Aytekin et al. Effect of limestone powder fineness and substitution ratio on the rheological properties of cementitious systems
Siddiqui Influence of fluidity on reliability of SCC produced using local Saudi materials

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant