CN112341063B - Medium-low grade machine-made sand concrete mix proportion debugging method - Google Patents
Medium-low grade machine-made sand concrete mix proportion debugging method Download PDFInfo
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- 239000004576 sand Substances 0.000 title claims abstract description 103
- 239000000203 mixture Substances 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000004568 cement Substances 0.000 claims abstract description 19
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 19
- 239000004575 stone Substances 0.000 claims description 23
- 239000010881 fly ash Substances 0.000 claims description 17
- 239000002994 raw material Substances 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 201000004569 Blindness Diseases 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
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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
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the 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
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/04—Supplying or proportioning the ingredients
- B28C7/0404—Proportioning
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/38—Concrete; Lime; Mortar; Gypsum; Bricks; Ceramics; Glass
- G01N33/383—Concrete or cement
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- 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
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- Engineering & Computer Science (AREA)
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Abstract
The method for debugging the mix proportion of the medium-low grade machine-made sand concrete is based on the existing standardized mix proportion of the river sand concrete, so that the applicable machine-made sand concrete is adjusted, the concrete production unit applying machine-made sand is convenient to produce, and the river sand concrete preparation technology is quickly transplanted to a machine-made sand concrete process; the method has simple procedure, can debug the machine-made sand concrete meeting the requirement only by 5 steps, and has strong practicability; the method locks the adjustment parameters of the machine-made sand concrete in three indexes of sand rate, water reducing agent and cement, determines the adjustment standard for each index, limits the adjustment range, and provides a simple and efficient path for the design of the mix proportion of the machine-made sand concrete; the method has better program normalization, avoids the experience and blindness of mix proportion debugging in the traditional production, and is convenient for large-scale popularization and use.
Description
Technical Field
The invention relates to the technical field of concrete mix proportion design and production, in particular to a method for debugging the mix proportion of medium-low grade machine-made sand concrete.
Background
In recent years, under the influence of environmental protection pressure and policy guidance, machine-made sand is beginning to be used in large areas in construction works as a substitute for river sand. At present, aiming at the application research of the machine-made sand in the concrete, the method mainly focuses on perfecting the production process of the machine-made sand, producing the machine-made sand with the physical property close to that of river sand, and further adopting a common concrete proportioning design method to design the machine-made sand concrete. However, in practical engineering practice, the machine-made sand is crushed, ground into round pieces, screened and washed by water to form a material with the properties close to those of river sand, and the production cost of the machine-made sand is far higher than that of the river sand. There is therefore a need for a method of conditioning the required river sand in concrete between models C20-C50 to use mechanical sand.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a method for debugging the mix proportion of medium-low grade machine-made sand concrete.
The technical scheme adopted by the invention is as follows: the method for debugging the mix proportion of the medium-low grade machine-made sand concrete comprises the following steps:
step one, adjusting performance parameters of machine-made sand to ensure that the fineness modulus is 2.4-3.2 and the crushing value is 20-50;
step two, taking the machine-made sand with well-adjusted performance parameters, setting the content of stone powder in the adopted machine-made sand as a% and the content of mud as b%, wherein the value of a is 3-10, the value of b is not more than 1.5, setting the selected raw materials in the river sand concrete as C1 parts, F1 parts, G1 parts, S1 parts, W1 parts and J1 parts according to the parts by weight, setting the strength of the river sand concrete as Q1, and setting the raw materials in C1, F1, G1, S1, W1, J1 and Q1 as known values;
setting the raw materials of machine-made sand concrete as C2 parts of cement, F2 parts of fly ash, G2 parts of broken stone, S2 parts of river sand, W2 parts of water and J2 parts of water reducing agent;
let S2= S1/(1- (a + b)%) and G2= G1+ S1-S2, giving values of S2 and G2;
step three, checking whether the obtained value of S2 can meet the formula S2/(S2+ G2) ≦ S1/(S1+ G1) × 120%, if so, entering step four, if not, enabling S2= S1 × 20% and G2= G1+ S1-S2 so as to obtain the values of S2 and G2, and then entering step four;
step four, firstly, enabling C2= C1, J2= J1, W2= W1 and F2= F1, then taking C2 parts of cement, F2 parts of fly ash, G2 parts of broken stone, S2 parts of river sand, W2 parts of water and J2 parts of water reducing agent according to the obtained values, then trial-mixing the machine-made concrete, observing slump after trial-mixing for 0.5-1h, if the slump of the trial-mixed machine-made concrete T2 is equal to the slump T1 of the original river sand concrete, keeping J2= J1 unchanged, and then entering step five; if the slump T2 of the trial-mixed machine-made concrete is smaller than the slump T1 of the original river sand concrete, J2= J1 × T1/T2, and then the step five is carried out;
step five, detecting the strength of the trial-mix machine concrete to obtain the strength of the trial-mix machine concrete Q2, wherein if Q2 is less than or equal to Q1 multiplied by 90%, C2= C1 multiplied by {1+ [ (Q1-Q2)/(2 multiplied by Q1) ] }; c2= C1 × 105% if [ (Q1-Q2)/(2 × Q1) ] > 4%; if the requirements of the above situation are not met between Q1 and Q2, then C2= C1 is kept unchanged.
After the five steps, determination values of cement C2 parts, fly ash F2 parts, broken stone G2 parts, river sand S2 parts, water W2 parts and water reducing agent J2 parts are obtained.
Compared with the prior art, the invention has the following beneficial effects: the method for debugging the mix proportion of the medium-low grade machine-made sand concrete can successfully apply machine-made sand with poor crushing value, stone powder content and roundness grinding to concrete production, reduce the production cost and improve the engineering benefit; the debugging method provided by the invention is based on the existing standardized river sand concrete mixing proportion, so that the applicable machine-made sand concrete is adjusted, the concrete production unit applied by machine-made sand is convenient to produce, and the river sand concrete preparation technology is quickly transplanted to the machine-made sand concrete process; the method has simple procedure, can debug the machine-made sand concrete meeting the requirement only by 5 steps, and has strong practicability; the method locks the adjustment parameters of the machine-made sand concrete in three indexes of sand rate, water reducing agent and cement, determines the adjustment standard for each index, limits the adjustment range, and provides a simple and efficient path for the design of the mix proportion of the machine-made sand concrete; the method has better program normalization, avoids the experience and blindness of mix proportion debugging in the traditional production, and is convenient for large-scale popularization and use.
Detailed Description
The present invention is further illustrated by the following examples, which are not intended to limit the scope of the invention. The procedures, conditions, reagents and the like for carrying out the present invention are general knowledge and common general knowledge in the art except for the contents specifically mentioned below, and the present invention is not particularly limited.
Example 1
The method for debugging the mix proportion of the medium-low grade machine-made sand concrete comprises the following steps:
step one, adjusting performance parameters of machine-made sand to enable the fineness modulus to be 2.4 and the crushing value to be 20;
step two, taking the machine-made sand with the adjusted performance parameters, setting the stone powder content in the adopted machine-made sand as a% and the mud content as b%, wherein the value of a is 3, the value of b is 1.5, setting the selected raw materials in the river sand concrete as cement C1 parts, fly ash F1 parts, broken stone G1 parts, river sand S1 parts, water W1 parts and water reducing agent J1 parts according to parts by weight, setting the strength of the river sand concrete as Q1, and setting the C1, F1, G1, S1, W1, J1 and Q1 as known values;
setting the raw materials of machine-made sand concrete as C2 parts of cement, F2 parts of fly ash, G2 parts of broken stone, S2 parts of river sand, W2 parts of water and J2 parts of water reducing agent;
let S2= S1/(1- (a + b)%) and G2= G1+ S1-S2, giving values of S2 and G2;
step three, checking whether the obtained value of S2 can meet the formula S2/(S2+ G2) ≦ S1/(S1+ G1) × 120%, if so, entering step four, if not, enabling S2= S1 × 20% and G2= G1+ S1-S2 so as to obtain the values of S2 and G2, and then entering step four;
step four, firstly, enabling C2= C1, J2= J1, W2= W1 and F2= F1, then taking C2 parts of cement, F2 parts of fly ash, G2 parts of broken stone, S2 parts of river sand, W2 parts of water and J2 parts of water reducing agent according to the obtained values, then trial-mixing the machine-made concrete, observing slump after trial-mixing for 0.5h, if the slump of the trial-mixed machine-made concrete T2 is equal to the slump of the original river sand concrete T1, keeping J2= J1 unchanged, and then entering step five; if the slump T2 of the trial-mixed machine-made concrete is smaller than the slump T1 of the original river sand concrete, J2= J1 × T1/T2, and then the step five is carried out;
step five, detecting the strength of the trial-mix machine concrete to obtain the strength of the trial-mix machine concrete Q2, wherein if Q2 is less than or equal to Q1 multiplied by 90%, C2= C1 multiplied by {1+ [ (Q1-Q2)/(2 multiplied by Q1) ] }; c2= C1 × 105% if [ (Q1-Q2)/(2 × Q1) ] > 4%; if the requirement of the above situation is not met between Q1 and Q2, then C2= C1 is kept unchanged.
After the five steps, determination values of cement C2 parts, fly ash F2 parts, broken stone G2 parts, river sand S2 parts, water W2 parts and water reducing agent J2 parts are obtained.
The river sand concrete is concrete with the model number of C20-C50, and the proportion of each model is standard value, namely C1, F1, G1, S1, W1, J1 and Q1 are all determined values.
Example 2
The method for debugging the mix proportion of the medium-low grade machine-made sand concrete comprises the following steps:
step one, adjusting performance parameters of machine-made sand to enable the fineness modulus to be 2.8 and the crushing value to be 35;
step two, taking the machine-made sand with the adjusted performance parameters, setting the stone powder content in the adopted machine-made sand as a% and the mud content as b%, wherein the value of a is 7, the value of b is 1, setting the selected raw materials in the river sand concrete as cement C1 parts, fly ash F1 parts, broken stone G1 parts, river sand S1 parts, water W1 parts and a water reducing agent J1 parts according to parts by weight, setting the strength of the river sand concrete as Q1, and setting the C1, F1, G1, S1, W1, J1 and Q1 to be known values;
setting the raw materials of machine-made sand concrete as C2 parts of cement, F2 parts of fly ash, G2 parts of broken stone, S2 parts of river sand, W2 parts of water and J2 parts of water reducing agent;
let S2= S1/(1- (a + b)%) and G2= G1+ S1-S2, giving values of S2 and G2;
step three, checking whether the obtained value of S2 can meet the formula S2/(S2+ G2) ≦ S1/(S1+ G1) × 120%, if so, entering step four, if not, enabling S2= S1 × 20% and G2= G1+ S1-S2 so as to obtain the values of S2 and G2, and then entering step four;
step four, firstly, enabling C2= C1, J2= J1, W2= W1 and F2= F1, then taking C2 parts of cement, F2 parts of fly ash, G2 parts of broken stone, S2 parts of river sand, W2 parts of water and J2 parts of water reducing agent according to the obtained values, then trial-mixing the machine-made concrete, observing slump after trial-mixing for 0.8h, if the slump of the trial-mixed machine-made concrete T2 is equal to the slump of the original river sand concrete T1, keeping J2= J1 unchanged, and then entering step five; if the slump T2 of the ready-mixed machine-made concrete is smaller than the slump T1 of the original river sand concrete, J2= J1 × T1/T2, and then entering the step five;
step five, detecting the strength of the trial-mix machine concrete to obtain the strength of the trial-mix machine concrete Q2, wherein if Q2 is less than or equal to Q1 multiplied by 90%, C2= C1 multiplied by {1+ [ (Q1-Q2)/(2 multiplied by Q1) ] }; c2= C1 × 105% if [ (Q1-Q2)/(2 × Q1) ] > 4%; if the requirement of the above situation is not met between Q1 and Q2, then C2= C1 is kept unchanged.
After the five steps, determination values of cement C2 parts, fly ash F2 parts, broken stone G2 parts, river sand S2 parts, water W2 parts and water reducing agent J2 parts are obtained.
The river sand concrete is concrete with the model number of C20-C50, and the proportion of each model is standard value, namely C1, F1, G1, S1, W1, J1 and Q1 are all determined values.
Example 3
The method for debugging the mix proportion of the medium-low grade machine-made sand concrete comprises the following steps:
step one, adjusting performance parameters of machine-made sand to enable the fineness modulus to be 3.2 and the crushing value to be 50;
step two, taking the machine-made sand with the adjusted performance parameters, setting the stone powder content in the adopted machine-made sand as a% and the mud content as b%, wherein the value of a is 10, the value of b is 0.5, setting the selected raw materials in the river sand concrete as cement C1 parts, fly ash F1 parts, broken stone G1 parts, river sand S1 parts, water W1 parts and water reducing agent J1 parts according to parts by weight, setting the strength of the river sand concrete as Q1, and setting the C1, F1, G1, S1, W1, J1 and Q1 as known values;
setting the raw materials of machine-made sand concrete as C2 parts of cement, F2 parts of fly ash, G2 parts of broken stone, S2 parts of river sand, W2 parts of water and J2 parts of water reducing agent;
let S2= S1/(1- (a + b)%) and G2= G1+ S1-S2, giving values of S2 and G2;
step three, checking whether the obtained value of S2 can meet the formula S2/(S2+ G2) ≦ S1/(S1+ G1) × 120%, if so, entering step four, if not, enabling S2= S1 × 20% and G2= G1+ S1-S2 so as to obtain the values of S2 and G2, and then entering step four;
step four, firstly, enabling C2= C1, J2= J1, W2= W1 and F2= F1, then taking C2 parts of cement, F2 parts of fly ash, G2 parts of broken stone, S2 parts of river sand, W2 parts of water and J2 parts of a water reducing agent according to obtained values, then trial-mixing the machine-made concrete, observing slump after trial-mixing for 1h, if the slump T2 of the trial-mixed machine-made concrete is equal to the slump T1 of the sand concrete of the original river, keeping J2= J1 unchanged, and then entering the step five; if the slump T2 of the ready-mixed machine-made concrete is smaller than the slump T1 of the original river sand concrete, J2= J1 × T1/T2, and then entering the step five;
step five, detecting the strength of the trial-mix machine concrete to obtain the strength of the trial-mix machine concrete Q2, wherein if Q2 is less than or equal to Q1 multiplied by 90%, C2= C1 multiplied by {1+ [ (Q1-Q2)/(2 multiplied by Q1) ] }; c2= C1 × 105% if [ (Q1-Q2)/(2 × Q1) ] > 4%; if the requirements of the above situation are not met between Q1 and Q2, then C2= C1 is kept unchanged.
After the five steps, determination values of cement C2 parts, fly ash F2 parts, broken stone G2 parts, river sand S2 parts, water W2 parts and water reducing agent J2 parts are obtained.
The river sand concrete is concrete with the model number of C20-C50, and the proportion of each model is standard value, namely C1, F1, G1, S1, W1, J1 and Q1 are all determined values.
Claims (1)
1. The method for debugging the mix proportion of the medium-low grade machine-made sand concrete is characterized by comprising the following steps of:
step one, adjusting performance parameters of machine-made sand to ensure that the fineness modulus is 2.4-3.2 and the crushing value is 20-50;
step two, taking the machine-made sand with well-adjusted performance parameters, setting the content of stone powder in the adopted machine-made sand as a% and the content of mud as b%, wherein the value of a is 3-10, the value of b is not more than 1.5, setting the selected raw materials in the river sand concrete as C1 parts, F1 parts, G1 parts, S1 parts, W1 parts and J1 parts according to the parts by weight, setting the strength of the river sand concrete as Q1, and setting the raw materials in C1, F1, G1, S1, W1, J1 and Q1 as known values;
setting the raw materials of machine-made sand concrete as C2 parts of cement, F2 parts of fly ash, G2 parts of broken stone, S2 parts of river sand, W2 parts of water and J2 parts of water reducing agent;
let S2= S1/(1- (a + b)%) and G2= G1+ S1-S2, giving values of S2 and G2;
step three, checking whether the obtained value of S2 can meet the formula S2/(S2+ G2) ≦ S1/(S1+ G1) × 120%, if so, entering step four, if not, enabling S2= S1 × 20% and G2= G1+ S1-S2 so as to obtain the values of S2 and G2, and then entering step four;
step four, firstly, enabling C2= C1, J2= J1, W2= W1 and F2= F1, then taking C2 parts of cement, F2 parts of fly ash, G2 parts of broken stone, S2 parts of river sand, W2 parts of water and J2 parts of water reducing agent according to the obtained values, then trial-mixing the machine-made concrete, observing slump after trial-mixing for 0.5-1h, if the slump of the trial-mixed machine-made concrete T2 is equal to the slump T1 of the original river sand concrete, keeping J2= J1 unchanged, and then entering step five; if the slump T2 of the trial-mixed machine-made concrete is smaller than the slump T1 of the original river sand concrete, J2= J1 × T1/T2, and then the step five is carried out;
step five, detecting the strength of the trial-mix machine-made concrete to obtain the strength Q2 of the trial-mix machine-made concrete, wherein if Q2 is not more than Q1 multiplied by 90%, C2= C1 multiplied by {1+ [ (Q1-Q2)/(2 multiplied by Q1) ] }; c2= C1 × 105% if [ (Q1-Q2)/(2 × Q1) ] > 4%; if the requirements of the above situation are not met between Q1 and Q2, then C2= C1 is kept unchanged.
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