CN115376618A - Concrete mix proportion full-calculation design method based on quantitative analysis - Google Patents
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Abstract
The invention discloses a concrete mix proportion fully-calculated design method based on quantitative analysis, which comprises the steps of determining design indexes; confirming the type and the blending proportion of the mineral admixture and the blending proportion of the water reducing agent; confirming the value of the standard deviation of the configured concrete strength grade value; testing and detecting the property parameters of the raw materials; calculating the concrete configuration strength; calculating the 28d compressive strength of the cementing material; calculating the water-cement ratio of the concrete; calculating the water consumption of concrete; calculating the usage amount of the rubber material; calculating the use amount of the fly ash; calculating the usage amount of the mineral powder; calculating the cement consumption; calculating the using amount of the water reducing agent; calculating the sand rate; calculating the usage of coarse aggregate and fine aggregate; calculating the actual water consumption; the concrete mixing proportion can reflect the concrete influence of the thickness degree of the produced sand, the particle size change of the pebbles and the slump index change on the sand rate and the water consumption of the concrete mixing proportion quantitatively, and the concrete mixing proportion meeting the requirements of strength and working performance can be designed quickly and accurately according to the partial performance of raw materials.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a concrete mix proportion fully-calculation design method based on quantitative analysis.
Background
The concrete is artificial stone which is prepared by taking cement as a main cementing material, mixing sand, stones, chemical additives and mineral admixtures as necessary, adding a certain amount of water according to a proper proportion, uniformly stirring, compacting, forming, curing and hardening. The concrete mixing proportion refers to the specific dosage relation among various component materials (cement, fly ash, mineral powder, sand, stone, water reducing agent and the like) in the concrete.
The existing common concrete mix proportion is designed according to JGJ55-2011 design rule of common concrete mix proportion, and the design method mainly has the following problems and defects: firstly, the water consumption, in JGJ55, the concrete mixing proportion water consumption with the water-glue ratio within 0.4-0.8 is obtained by a table look-up method, the method cannot be applied to the mixing proportion with the low water-glue ratio, and the design limitation is obvious. In addition, when the fineness of the sand changes, the JGJ55 only provides an adjusting method for increasing water by 5-10kg for coarse sand and reducing water by 5-10kg for fine sand, and the specification defines coarse sand and fine sand according to the fineness modulus range of the sand, the definition range is too wide, even in the range of coarse sand (or fine sand), if the fineness modulus of the sand changes, a proper water consumption can be found by repeated tests only depending on the experience of designers, so that the test times are greatly increased and the labor cost is increased; secondly, the sand rate in JGJ55 also adopts a table look-up method, and only the sand rate specific value taking method under four conditions of the water-glue ratio of 0.40, 0.50, 0.60 and 0.70 is adopted, and the given sand rate is an interval range, and the sand rate value range is overlarge, but in actual production, even if different sand rates are in the same interval range, the working performance and the material cost of the concrete can have huge differences, a large number of experiments are usually required by skilled technicians, the times and the effects of the experiments depend on the experience of the technicians seriously, and the results obtained by the experiments of different technicians are also different from each other.
It can be seen that the current design methods of common concrete are all designed according to the above industry standards, wherein the sand rate and water consumption are obtained according to the above qualitative analysis and experience modes, and have certain guiding significance in a certain range, but cannot cope with the current situation that the mix proportion needs to be adjusted in time due to frequent changes of raw materials; therefore, a design method for fully calculating the mix proportion of the common concrete, which can quantitatively reflect the concrete influence of the thickness degree of the produced sand, the particle size change of the stones and the slump index change on the sand rate and the water consumption of the mix proportion of the concrete, and can quickly and accurately design the mix proportion of the concrete according to the requirements of strength and working performance according to partial performances of raw materials, is urgently needed.
Disclosure of Invention
Aiming at the defects or improvement requirements of the prior art, the invention provides a concrete mix proportion total calculation design method based on quantitative analysis, the calculation of sand rate and water consumption is changed from original qualitative analysis into quantitative analysis, the influence of the change of specific properties of raw materials on the concrete sand rate can be accurately expressed under different water-cement ratios, the actual mix proportion of concrete in different materials can be calculated more quickly and accurately, and the cost and quality control are more in line with the actual application requirements of the concrete mix proportion; the total calculation process of the sand rate and the water consumption introduces the slump design index of the concrete, the working performance of the concrete is similar to the consumption and the property of raw materials, the working performance of the concrete can be accurately controlled while the strength of the concrete is controlled, and the influence of material change on the concrete renting performance can be quickly coped with in the actual production; the experience dependence on concrete designers is greatly reduced in the whole calculation process, and the accurate mix proportion suitable for different raw materials can be quickly and accurately calculated aiming at the current situations that the raw materials in the existing concrete market are scarce and the material performance is different day by day, so that the test times and the test period are greatly reduced, and the efficiency of the design of the mix proportion of the concrete is improved; the method can quantitatively reflect the concrete influence of the thickness degree of the produced sand, the particle size change of the stones and the slump index change on the sand rate and the water consumption of the concrete mixing ratio, and can realize that the concrete mixing ratio meeting the requirements of strength and working performance can be quickly and accurately designed according to the partial performances of raw materials.
In order to achieve the aim, the invention provides a concrete mixing proportion fully-calculation design method based on quantitative analysis, which comprises the following steps:
s1: clear design indexes are as follows: the method comprises the steps of configuring concrete strength grade, design slump and concrete gas content;
s2: confirming the type and the blending proportion of the mineral admixture and the blending proportion of the water reducing agent; the mineral admixture comprises fly ash and mineral powder; the mixing amount of the fly ash is a, and the influence coefficient of the fly ash is gamma f (ii) a The mixing amount of the mineral powder is b, and the influence coefficient of the mineral powder is gamma k (ii) a The mixing amount of the water reducing agent is beta, and the solid content of the water reducing agent is beta α The water reducing rate of the water reducing agent is beta β ；
S3: confirming the value of the standard deviation of the configured concrete strength grade value;
s4: testing, detecting and obtaining the property parameters of the raw materials, including the maximum grain diameter of the coarse aggregate, the fineness modulus of the fine aggregate, the 28d compressive strength value of the cement, the apparent density of the fly ash, the apparent density of the mineral powder, the apparent density of the coarse aggregate, the apparent density of the fine aggregate, the apparent density of the water reducing agent and the density of water;
s5: obtaining the concrete configuration strength according to the concrete strength grade and the standard deviation value of the concrete strength grade value;
s6: calculating the 28d compressive strength of the cementing material according to the 28d compressive strength value of the cement, the influence coefficient of the fly ash and the influence coefficient of the mineral powder;
s7: calculating the water-cement ratio of the concrete according to the 28d compressive strength and the concrete configuration strength of the cementing material; calculating the water consumption of the concrete according to the maximum particle size of the coarse aggregate, the fineness modulus of the fine aggregate, the slump and the slump; calculating the using amount of the glue material according to the using amount of the water for the concrete;
s8: calculating the use amount of the fly ash, the use amount of the mineral powder, the use amount of the cement and the use amount of the water reducing agent according to the use amount of the glue material;
s9: calculating the sand rate according to the maximum particle size of the coarse aggregate, the fineness modulus of the fine aggregate and the slump;
s10: calculating the usage amount of the coarse aggregate and the usage amount of the fine aggregate according to the sand rate, the usage amount of the cement, the usage amount of the fly ash, the usage amount of the concrete, the usage amount of the water reducing agent, the apparent density of the cement, the apparent density of the fly ash, the apparent density of the coarse aggregate, the apparent density of the fine aggregate, the apparent density of the water reducing agent, the density of water and the air content of the concrete;
s11: and calculating the actual water consumption according to the water consumption of the concrete, the water reducing agent consumption and the solid content of the water reducing agent.
Further, step S4 further includes: if the 28d compressive strength value of the cement is not measured, calculating according to the formula (1)
f ce ＝γ c *f ce.g (1)，
Wherein f is ce The 28d compressive strength value of the cement; gamma ray c Is a margin coefficient of the cement strength grade value, f ce.g And the value is the cement strength grade value.
Further, step S5 includes calculating the concrete placement strength according to equation (2):
f cu.o ≥f cu.k +1.645*δ (2)，
wherein f is cu.o Configuring strength for the concrete; f. of cu.k The concrete strength grade is obtained; and delta is the value of the standard deviation of the concrete strength grade value.
Further, step S6 also includes calculating the 28d compressive strength of the cement according to formula (3):
f b ＝γ f *γ k *f ce (3)，
wherein, f b The 28d compressive strength of the cement; gamma ray f Is the influence coefficient of the fly ash; gamma ray k The influence coefficient of the mineral powder; f. of ce The cement compressive strength value is 28 d.
Further, step S7 further includes calculating the water-cement ratio of the concrete according to equation (4):
wherein: W/B is the water-cement ratio of the concrete; f. of b Is a gel materialThe 28d compressive strength of the material; f. of cu.o Configuring strength for concrete; alpha is alpha a 、α b The regression coefficient of the coarse aggregate is obtained; if the coarse aggregate is crushed stone, alpha a And alpha b The values are 0.53 and 0.20 respectively; if the coarse aggregate is pebble, alpha a And alpha b The values are 0.49 and 0.13 respectively.
Further, step S7 includes calculating the water consumption of the concrete according to equation (5):
W＝(A1-B1*ln(D max )-C1*μ f +D1*h)*(1-β β ) (5)，
wherein: w is the water consumption of the concrete; a1, B1, C1 and D1 are constants; d max Is the maximum particle diameter of the coarse aggregate, mu f Is the fineness modulus of the fine aggregate; h is slump; beta is a beta β The water reducing rate of the water reducing agent is obtained;
the amount of the rubber material B is calculated according to the formula (6):
wherein B is the consumption of the adhesive material; w is the water consumption of the concrete; W/B is the water-cement ratio of the concrete.
Further, step S8 includes calculating the usage amount of the fly ash according to equation (7):
F＝B*a (7)，
wherein F is the using amount of the fly ash; b is the consumption of the rubber material; a is the blending amount of the fly ash;
the usage K of the mineral powder is calculated according to the formula (8):
K＝B*b (8)，
wherein K is the using amount of the mineral powder; b is the dosage of the adhesive material; b is the mixing amount of mineral powder
The cement amount is calculated according to formula (9):
C＝B-F-K (9)，
wherein C is the dosage of cement; b is the consumption of the rubber material; f is the using amount of the fly ash; k is the using amount of the mineral powder;
the amount of water reducing agent is calculated according to formula (10):
α＝B*β (10)，
wherein alpha is the dosage of the water reducing agent; b is the consumption of the rubber material; beta is the mixing amount of the water reducing agent.
Further, step S9 further includes: the sand ratio was calculated according to equation (11):
β s ＝A2-B2*ln(D max )+C2*(W/B)+D2*h-E*μ f (11)，
wherein: beta is a s The sand rate is calculated; a2, B2, C2, D2 and E are constants; W/B is the water-cement ratio of the concrete; d max Is the maximum particle diameter of the coarse aggregate, mu f Is the fineness modulus of the fine aggregate; h is slump; e is a constant value.
Further, step S10 further includes: the coarse aggregate amount G and the fine aggregate amount S are calculated comprehensively according to the formulas (12) and (13):
wherein: g is the dosage of the coarse aggregate; s is the amount of fine aggregate; beta is a beta s The sand rate; c is the cement dosage; f is the using amount of the fly ash; k is the using amount of the mineral powder; w is the water consumption of the concrete; alpha is the dosage of the water reducing agent; ρ is a unit of a gradient c Is the apparent density, rho, of the cement f Is apparent density, rho, of fly ash k Apparent density, rho, of the ore powder s Apparent density, rho, of fine aggregate G Apparent density, rho, of coarse aggregate α Is the apparent density, rho, of the water reducing agent W Is the density of water; and chi is the gas content of the concrete.
Further, step S11 further includes: the actual water consumption is calculated according to equation (14):
W fruit of Chinese wolfberry ＝W-α*(1-β α ) (14)，
Wherein, W Fruit of Chinese wolfberry The actual water consumption is achieved; w is the water consumption of the concrete; alpha is the dosage of the water reducing agent; beta is a beta α Is the solid content of the water reducing agent.
In general, compared with the prior art, the above technical solutions conceived by the present invention can achieve the following beneficial effects:
(1) According to the concrete mix proportion fully-calculation design method based on quantitative analysis, the calculation of the sand rate and the water consumption is converted from the original qualitative analysis into the quantitative analysis, the influence of the change of the specific property of the raw material on the concrete sand rate can be accurately expressed under different water-cement ratios, the actual mix proportion of concrete in different materials can be calculated more quickly and accurately, and the cost and quality control are more in line with the actual application requirement of the concrete mix proportion; the total calculation process of the sand rate and the water consumption introduces the slump design index of the concrete, the working performance of the concrete is similar to the consumption and the property of raw materials, the working performance of the concrete can be accurately controlled while the strength of the concrete is controlled, and the influence of material change on the concrete public rental performance can be quickly dealt with in the actual production; compared with the traditional design method, the total calculation method leads the concrete mixing proportion design to be from semi-quantitative to full-quantitative and from experience to scientific; the concrete mixing proportion design method has the advantages that concrete influences on the sand rate and the water consumption of the concrete mixing proportion caused by the thickness degree of sand, the particle size change of stones and the slump index change can be reflected quantitatively, and compared with the traditional mixing proportion design, the concrete mixing proportion meeting the requirements of strength and working performance can be designed quickly and accurately according to partial performances of raw materials by a total calculation method.
(2) According to the concrete mix proportion fully-calculation design method based on quantitative analysis, experience dependence on concrete designers is greatly reduced in the fully-calculation process, the accurate mix proportion suitable for different raw materials can be quickly and accurately calculated aiming at the current situations that the raw materials in the existing concrete market are scarce and the material performance is changed day by day, the test times and the test period are greatly reduced, and the efficiency of concrete mix proportion design is improved.
Drawings
Fig. 1 is a schematic flow chart of a concrete mix proportion fully-calculation design method based on quantitative analysis according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention. In addition, the technical features involved in the respective embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in FIG. 1, the invention provides a concrete mix proportion fully-calculating design method based on quantitative analysis, which comprises the following specific design steps:
s1: clear design indexes are as follows: comprising configuring a concrete strength grade f cu.k Design slump h (mm), concrete gas content chi (%);
s2: confirming the types and the doping proportion of the mineral admixture and the doping proportion of the water reducing agent: wherein the mineral admixture comprises fly ash and mineral powder; the doping amount of the fly ash is a, and the influence coefficient of the fly ash is gamma f (ii) a The mixing amount of the mineral powder is b and the influence coefficient of the mineral powder is gamma k (ii) a The mixing amount of the water reducing agent is beta (%), and the solid content of the water reducing agent is beta α (%) and the water reducing rate of the water reducing agent is beta β (％)；
S3: confirming a value delta (MPa) of a standard deviation of the configured concrete strength grade value;
s4: testing and obtaining the property parameters of the raw materials (the raw materials should meet the relevant national standards of building materials), including the maximum particle size D of the coarse aggregate max (mm), fineness modulus of fine aggregate μ f 28d compressive strength value f of cement ce (MPa); apparent density of cement rho c Apparent density rho of fly ash f Apparent density rho of mineral powder k Apparent density of coarse aggregate rho G Apparent density of fine aggregate rho s Apparent density rho of water reducing agent α And density of water ρ W ；
If f is ce No measured value, calculated according to the formula (1)
f ce ＝γ c *f ce.g (1)，
Wherein, γ c Is cementMargin coefficient of intensity grade value, f ce.g The value is the cement strength grade value;
s5: obtaining the concrete configuration strength according to the concrete strength grade and the standard deviation value of the concrete strength grade value; concrete placement strength f cu.o Calculated according to equation (2):
f cu.o ≥f cu.k +1.645*δ (2)，
wherein f is cu.o Configuring strength for concrete; f. of cu.k The concrete strength grade is obtained; delta is the value of the standard deviation of the concrete strength grade value;
s6: calculating the 28d compressive strength of the cementing material according to the 28d compressive strength value of the cement, the influence coefficient of the fly ash and the influence coefficient of the mineral powder; the 28d compressive strength of the cementing material can be measured and taken; the 28d compressive strength of the cement is calculated according to formula (3):
f b ＝γ f *γ k *f ce (3)，
wherein, f b The 28d compressive strength of the cement; gamma ray f Is the influence coefficient of the fly ash; gamma ray k The influence coefficient of the mineral powder; f. of ce The 28d compressive strength value of the cement;
s7: calculating the water-cement ratio of the concrete according to the 28d compressive strength and the concrete configuration strength of the cementing material; calculating the water consumption of the concrete according to the maximum particle size of the coarse aggregate, the fineness modulus of the fine aggregate, the slump and the slump; calculating the using amount of the glue material according to the water using amount of the concrete;
the water-cement ratio of the concrete is calculated according to the formula (4):
wherein: W/B is the water-cement ratio of concrete; w is the water consumption (unit is kg) of the concrete; b is the dosage of the rubber material (unit is kg); f. of b The 28d compressive strength of the cement; f. of cu.o Configuring strength for the concrete; alpha (alpha) ("alpha") a 、α b The regression coefficient of the coarse aggregate is obtained; if the coarse aggregate is crushed stone, alpha a And alpha b The values are 0.53 and 0.20 respectively; if the coarse aggregate is pebble, alpha a And alpha b The values are 0.49 and 0.13 respectively;
the concrete water consumption is calculated according to the formula (5):
W＝(A1-B1*ln(D max )-C1*μ f +D1*h)*(1-β β ) (5)，
wherein: w is the water consumption of the concrete; a1, B1, C1 and D1 are constants; d max Is the maximum particle diameter (unit is mm) of the coarse aggregate, mu f Is the fineness modulus of the fine aggregate; h is slump (in mm); beta is a beta β The water reducing rate (%) of the water reducing agent;
the amount of the adhesive material is calculated according to the formula (6):
wherein B is the consumption of the adhesive material; w is the water consumption of the concrete; W/B is the water-cement ratio of concrete;
s8: calculating the use amount of the fly ash, the use amount of the mineral powder, the use amount of the cement and the use amount of the water reducing agent according to the use amount of the adhesive material; the fly ash dosage F is calculated according to the formula (7):
F＝B*a (7)，
wherein F is the usage amount (unit is kg) of the fly ash; b is the dosage of the rubber material (unit is kg); a is the blending amount of the fly ash;
the usage amount of the mineral powder is calculated according to the formula (8):
K＝B*b (8)，
wherein K is the usage amount (unit is kg) of mineral powder; b is the dosage of the rubber material (unit is kg); b is the mixing amount of the mineral powder;
the cement amount is calculated according to formula (9):
C＝B-F-K (9)，
wherein C is the cement dosage (unit is kg); b is the dosage of the rubber material (unit is kg); f is the using amount (unit is kg) of the fly ash; k is the using amount (unit is kg) of the mineral powder;
the amount of the water reducing agent is calculated according to the formula (10)
α＝B*β (10)，
Wherein alpha is the dosage of the water reducing agent; b is the dosage of the rubber material (unit is kg); beta is the mixing amount of the water reducing agent;
s9: calculating the sand ratio from the maximum particle diameter of the coarse aggregate, the fineness modulus of the fine aggregate, and the slump value according to formula (11):
β s ＝A2-B2*ln(D max )+C2*(W/B)+D2*h-E*μ f (11)，
wherein: beta is a s The sand rate; a2, B2, C2, D2 and E are constants; W/B is the water-cement ratio of the concrete; d max Is the maximum particle diameter (in mm) of the coarse aggregate, mu f The fineness modulus of the fine aggregate; h is slump (in mm); e is a constant value;
s10: calculating the usage amount of the coarse aggregate and the usage amount of the fine aggregate according to the sand rate, the usage amount of the cement, the usage amount of the fly ash, the usage amount of the concrete, the usage amount of the water reducing agent, the apparent density of the cement, the apparent density of the fly ash, the apparent density of the coarse aggregate, the apparent density of the fine aggregate, the apparent density of the water reducing agent, the density of water and the air content of the concrete; the coarse aggregate amount and the fine aggregate amount are comprehensively calculated according to the formula (12) and the formula (13):
wherein: g is the dosage of the coarse aggregate (unit is kg); s is the dosage of the fine aggregate (unit is kg); beta is a s The sand rate; c is the cement dosage (unit is kg); f is the using amount (unit is kg) of the fly ash; k is the usage amount (unit is kg) of mineral powder; w is the water consumption (unit is kg) of the concrete; alpha is the dosage of the water reducing agent; rho c Is the apparent density, rho, of the cement f Is apparent density, rho, of fly ash k Apparent density, rho, of the ore powder s Apparent density, rho, of fine aggregate G Apparent density, rho, of coarse aggregate α Is the apparent density, rho, of the water reducing agent W Is the density of water; chi is the gas content of the concrete;
s11: calculating actual water consumption according to the water consumption of the concrete, the consumption of the water reducing agent and the solid content of the water reducing agent; the actual water consumption is calculated according to equation (14):
W fruit of Chinese wolfberry ＝W-α*(1-β α ) (14)，
Wherein: w Fruit of Chinese wolfberry The actual water consumption is achieved; w is the water consumption (unit is kg) of concrete; alpha is the dosage of the water reducing agent; beta is a beta α Is the solid content of the water reducing agent.
The practical effect after the implementation of the invention shows that:
by collecting partial property parameters of a certain commercial concrete raw material, the concrete mixing proportion with the slump of 190mm, the strength grade of C30-C50 and the gas content of 1% is designed by adopting the full calculation process of the invention, and the concrete mixing proportion parameters are as follows:
properties of the collected raw material fractions (as shown in table 1):
TABLE 1 collected raw material part Properties
The mix ratios calculated using the present invention (as shown in table 2) were:
TABLE 2 concrete mix proportions calculated using the present invention
Actual strength and performance of the calculated mix ratios of the present invention (as shown in table 3):
TABLE 3 evaluation of actual strength and workability of the calculated concrete mix proportions of the present invention
As can be seen from the above table, the strength of each grade of concrete calculated by the method meets the design requirements, and each index of the working performance of the fresh concrete meets the design and construction requirements; the concrete mixing proportion can be designed quickly and accurately according to the partial performances of raw materials, and concrete mixing proportion meeting the requirements of strength and working performance can be designed.
The invention provides a working principle of a concrete mix proportion fully-calculation design method based on quantitative analysis, which comprises the following steps:
the calculation of the sand rate and the water consumption is changed from the original qualitative analysis into the quantitative analysis, the influence of the change of the specific property of the raw material on the concrete sand rate can be accurately expressed under different water-gel ratios, the actual mix proportion of concrete in different materials can be calculated more quickly and accurately, and the cost and quality control better meet the actual application requirement of the concrete mix proportion; the total calculation process of the sand rate and the water consumption introduces the slump design index of the concrete, the working performance of the concrete is similar to the consumption and the property of raw materials, the working performance of the concrete can be accurately controlled while the strength of the concrete is controlled, and the influence of material change on the concrete public rental performance can be quickly dealt with in the actual production; the full calculation process greatly reduces the experience dependence on concrete designers, can quickly and accurately calculate the accurate mix proportion suitable for different raw materials aiming at the current situations that the raw materials of the existing concrete market are scarce and the material performance is changed day by day, greatly reduces the test times and the test period, and improves the efficiency of the design of the mix proportion of the concrete; the method can quantitatively reflect the concrete influence of the thickness degree of the produced sand, the particle size change of the pebbles and the slump index change on the sand rate and the water consumption of the concrete mixing ratio, and can realize that the concrete mixing ratio meeting the requirements of strength and working performance can be quickly and accurately designed according to the partial performance of the raw materials.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A concrete mix proportion fully-calculation design method based on quantitative analysis is characterized by comprising the following steps:
s1: clear design indexes: the method comprises the steps of configuring concrete strength grade, design slump and concrete gas content;
s2: confirming the type and the blending proportion of the mineral admixture and the blending proportion of the water reducing agent; the types of the mineral admixture comprise fly ash and mineral powder; the mixing amount of the fly ash is a, and the influence coefficient of the fly ash is gamma f (ii) a The mixing amount of the mineral powder is b, and the influence coefficient of the mineral powder is gamma k (ii) a The mixing amount of the water reducing agent is beta, and the solid content of the water reducing agent is beta α The water reducing rate of the water reducing agent is beta β ；
S3: confirming the value of the standard deviation of the configured concrete strength grade value;
s4: testing, detecting and obtaining raw material property parameters, including the maximum particle size of the coarse aggregate, the fineness modulus of the fine aggregate, the 28d compressive strength value of the cement, the apparent density of the fly ash, the apparent density of the mineral powder, the apparent density of the coarse aggregate, the apparent density of the fine aggregate, the apparent density of the water reducing agent and the density of water;
s5: obtaining the concrete configuration strength according to the concrete strength grade and the standard deviation value of the concrete strength grade value;
s6: calculating the 28d compressive strength of the cementing material according to the 28d compressive strength value of the cement, the influence coefficient of the fly ash and the influence coefficient of the mineral powder;
s7: calculating the water-cement ratio of the concrete according to the 28d compressive strength and the concrete configuration strength of the cementing material; calculating the water consumption of the concrete according to the maximum particle size of the coarse aggregate, the fineness modulus of the fine aggregate, the slump and the slump; calculating the using amount of the glue material according to the water using amount of the concrete;
s8: calculating the use amount of the fly ash, the use amount of the mineral powder, the use amount of the cement and the use amount of the water reducing agent according to the use amount of the glue material;
s9: calculating the sand rate according to the maximum particle size of the coarse aggregate, the fineness modulus of the fine aggregate and the slump;
s10: calculating the usage amount of the coarse aggregate and the usage amount of the fine aggregate according to the sand rate, the usage amount of the cement, the usage amount of the fly ash, the usage amount of the concrete, the usage amount of the water reducing agent, the apparent density of the cement, the apparent density of the fly ash, the apparent density of the coarse aggregate, the apparent density of the fine aggregate, the apparent density of the water reducing agent, the density of water and the gas content of the concrete;
s11: and calculating the actual water consumption according to the water consumption of the concrete, the water reducing agent consumption and the solid content of the water reducing agent.
2. The concrete mix proportion fully-calculation design method based on quantitative analysis as claimed in claim 1, wherein step S4 further comprises: if the 28d compressive strength value of the cement is not measured, calculating according to the formula (1)
f ce ＝γ c *f ce.g (1)，
Wherein, f ce The 28d compressive strength value of the cement; gamma ray c Is a margin coefficient of the cement strength grade value, f ce.g And the value is the cement strength grade value.
3. The concrete mix proportion fully-calculation design method based on quantitative analysis as claimed in claim 2, wherein step S5 further comprises calculating the concrete allocation strength according to formula (2):
f cu.o ≥f cu.k +1.645*δ (2)，
wherein f is cu.o Configuring strength for concrete; f. of cu.k The concrete strength grade is adopted; delta is the value of the standard deviation of the concrete strength grade value。
4. The concrete mix proportion fully-calculation design method based on quantitative analysis according to any one of claims 1-3, wherein step S6 further comprises calculating the 28d compressive strength of the cementing material according to formula (3):
f b ＝γ f *γ k *f ce (3)，
wherein, f b The 28d compressive strength of the cement; gamma ray f Is the influence coefficient of the fly ash; gamma ray k The influence coefficient of the mineral powder; f. of ce The cement compressive strength value is 28 d.
5. The concrete mix proportion fully-calculation design method based on quantitative analysis as claimed in claim 4, wherein step S7 further comprises calculating the concrete water-cement ratio according to formula (4):
wherein: W/B is the water-cement ratio of the concrete; w is the water consumption of the concrete; b is the dosage of the adhesive material; f. of b The 28d compressive strength of the cement; f. of cu.o Configuring strength for concrete; alpha is alpha a 、α b The regression coefficient of the coarse aggregate is obtained; if the coarse aggregate is crushed stone, alpha a And alpha b The values are 0.53 and 0.20 respectively; if the coarse aggregate is pebble, alpha a And alpha b The values are 0.49 and 0.13 respectively.
6. The concrete mix proportion fully-calculation design method based on quantitative analysis according to claim 5, wherein the step S7 further comprises calculating the water consumption of the concrete according to the formula (5):
W＝(A1-B1*ln(D max )-C1*μ f +D1*h)*(1-β β ) (5)，
wherein: w is the water consumption of the concrete; a1, B1, C1 and D1 are constants; d max Is the maximum particle diameter of the coarse aggregate, mu f The fineness modulus of the fine aggregate; h is slump; beta is a β Is slump;
the amount of the rubber material is calculated according to the formula (6):
wherein B is the consumption of the adhesive material; w is the water consumption of the concrete; W/B is the water-cement ratio of the concrete.
7. The concrete mix proportion fully-calculation design method based on quantitative analysis as claimed in claim 6, wherein step S8 further comprises calculating the fly ash dosage according to formula (7):
F＝B*a (7)，
wherein F is the using amount of the fly ash; b is the consumption of the rubber material; a is the blending amount of the fly ash;
the usage K of the mineral powder is calculated according to the formula (8):
K＝B*b (8)，
wherein K is the using amount of the mineral powder; b is the consumption of the rubber material; b is the mixing amount of mineral powder
The cement amount is calculated according to formula (9):
C＝B-F-K (9)，
wherein C is the cement dosage; b is the consumption of the rubber material; f is the using amount of the fly ash; k is the using amount of the mineral powder;
the amount of water reducing agent is calculated according to formula (10):
α＝B*β (10)，
wherein alpha is the dosage of the water reducing agent; b is the dosage of the adhesive material; beta is the mixing amount of the water reducing agent.
8. The concrete mix proportion fully-calculation design method based on quantitative analysis as claimed in claim 7, wherein step S9 further comprises: the sand ratio was calculated according to equation (11):
β s ＝A2-B2*ln(D max )+C2*(W/B)+D2*h-E*μ f (11)，
wherein: beta is a s The sand rate; a2, B2, C2, D2 and E are constants; W/B is the water-cement ratio of concrete; d max Is the maximum particle diameter of the coarse aggregate, mu f Is the fineness modulus of the fine aggregate; h is slump; e is a constant value.
9. The concrete mix proportion fully-calculation design method based on quantitative analysis according to claim 8, wherein the step S10 further comprises: the coarse aggregate amount G and the fine aggregate amount S are comprehensively calculated according to the formula (12) and the formula (13):
wherein: g is the dosage of coarse aggregate; s is the amount of fine aggregate; beta is a s The sand rate; c is the cement dosage; f is the using amount of the fly ash; k is the using amount of the mineral powder; w is the water consumption of the concrete; alpha is the dosage of the water reducing agent; rho c Apparent density, rho, of cement f Is apparent density, rho, of fly ash k Apparent density, rho, of the ore powder s Apparent density, rho, of fine aggregate G Apparent density, rho, of coarse aggregate α Is the apparent density, rho, of the water reducing agent W Is the density of water; and chi is the gas content of the concrete.
10. The concrete mix proportion fully-calculation design method based on quantitative analysis according to claim 9, wherein the step S11 further comprises: the actual water consumption is calculated according to equation (14):
W fruit of Chinese wolfberry ＝W-α*(1-β α ) (14)，
Wherein, W Fruit of Chinese wolfberry The actual water consumption is achieved; w isWater consumption of concrete; alpha is the dosage of the water reducing agent; beta is a α Is the solid content of the water reducing agent.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116434894A (en) * | 2023-06-12 | 2023-07-14 | 合肥工业大学 | Mixing proportion design method and manufacturing method of steel slag replaced fine aggregate concrete |
| CN116953210A (en) * | 2023-08-09 | 2023-10-27 | 重庆茂侨科技有限公司 | Concrete compressive strength prediction method based on four factors |
| CN117637075A (en) * | 2023-12-13 | 2024-03-01 | 中交第二航务工程局有限公司 | Concrete mix proportion design method based on big data |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116434894A (en) * | 2023-06-12 | 2023-07-14 | 合肥工业大学 | Mixing proportion design method and manufacturing method of steel slag replaced fine aggregate concrete |
| CN116434894B (en) * | 2023-06-12 | 2023-08-11 | 合肥工业大学 | Mixing proportion design method and manufacturing method of steel slag replaced fine aggregate concrete |
| CN116953210A (en) * | 2023-08-09 | 2023-10-27 | 重庆茂侨科技有限公司 | Concrete compressive strength prediction method based on four factors |
| CN116953210B (en) * | 2023-08-09 | 2024-03-19 | 重庆茂侨科技有限公司 | Concrete compressive strength prediction method based on four factors |
| CN117637075A (en) * | 2023-12-13 | 2024-03-01 | 中交第二航务工程局有限公司 | Concrete mix proportion design method based on big data |
| CN117637075B (en) * | 2023-12-13 | 2024-05-14 | 中交第二航务工程局有限公司 | Concrete mix proportion design method based on big data |
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