CN113063931A - Method for detecting raw materials used in concrete production - Google Patents
Method for detecting raw materials used in concrete production Download PDFInfo
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- CN113063931A CN113063931A CN202110305840.9A CN202110305840A CN113063931A CN 113063931 A CN113063931 A CN 113063931A CN 202110305840 A CN202110305840 A CN 202110305840A CN 113063931 A CN113063931 A CN 113063931A
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- 239000002994 raw material Substances 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 115
- 238000012360 testing method Methods 0.000 claims abstract description 66
- 239000000463 material Substances 0.000 claims abstract description 31
- 239000004576 sand Substances 0.000 claims abstract description 21
- 230000000740 bleeding effect Effects 0.000 claims abstract description 19
- 239000000654 additive Substances 0.000 claims abstract description 15
- 230000000996 additive effect Effects 0.000 claims abstract description 14
- 230000008859 change Effects 0.000 claims abstract description 7
- 238000012797 qualification Methods 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 35
- 239000000203 mixture Substances 0.000 claims description 28
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 19
- 239000004568 cement Substances 0.000 claims description 10
- 239000010881 fly ash Substances 0.000 claims description 10
- 238000012216 screening Methods 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 7
- 239000002893 slag Substances 0.000 claims description 4
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 229910021487 silica fume Inorganic materials 0.000 claims description 2
- 239000003638 chemical reducing agent Substances 0.000 description 21
- 239000002253 acid Substances 0.000 description 19
- 238000001514 detection method Methods 0.000 description 10
- 230000009467 reduction Effects 0.000 description 10
- 230000007306 turnover Effects 0.000 description 6
- 230000003044 adaptive effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000004134 energy conservation Methods 0.000 description 5
- 230000006872 improvement Effects 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 238000013461 design Methods 0.000 description 3
- 239000012615 aggregate Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
Classifications
-
- 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; ceramics; glass; bricks
- G01N33/383—Concrete, cement
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
Abstract
The invention discloses a method for detecting raw materials used in concrete production, which comprises the following steps of 1, preparing standard sample mortar; 2, preparing reference mortar: replacing the stones of the standard sample with sand with equal specific surface area, preparing reference mortar corresponding to the technical index of the standard sample mortar without changing other raw materials, 3, preparing test mortar: changing the type or the mixing amount of any component of the cementing material in the reference mortar, or the type or the mixing amount of the additive, or changing the type or the mixing amount of the sand, and keeping single-factor change, wherein the obtained mortar is called test mortar; 4, qualification judgment: if the test index of the test mortar meets the test index of the standard sample mortar, the changed raw material type or the changed mixing amount is qualified, otherwise, the changed raw material type or the changed mixing amount is unqualified. The method can quickly, conveniently and accurately judge the raw material fluctuation factors causing concrete bleeding and insufficient strength, generally only needs about 10 minutes, lays a foundation for solving the problem of insufficient concrete bleeding strength and providing countermeasures, and has wide application.
Description
Technical Field
The invention belongs to the technical field of concrete raw material detection, and particularly relates to a method for detecting raw materials used for concrete production.
Background
In the existing commercial concrete mixing plant, the quality common defects of bleeding and strength not meeting design requirements often occur due to fluctuation of raw materials, and the production quality of the mixing plant is seriously influenced. The design requirements of concrete bleeding and insufficient strength are influenced by a plurality of factors, and the key factor is determined to play a leading role, so that a key for solving the problem of concrete bleeding is found. The concrete raw materials mainly comprise three main types of gelled materials, aggregates and water reducing agents, a quick and convenient inspection method capable of accurately judging which gelled materials, aggregates or water reducing agents are main factors causing concrete bleeding is researched, a foundation is laid for solving the problem of raw material fluctuation of the concrete, and if the existing raw material detection is carried out according to a standard method, the period is long, at least 1-2 hours are needed, the influence of human factors is large, and the test error is large. For example, sand detection: in the production process of commercial concrete, the fineness and the MB value of the sand greatly influence the working performance of the concrete and the requirement of an additive, an MB value test and a screening test need to be carried out, meanwhile, a sampling and adaptation test also needs to be carried out, the production volume of the concrete is large, the consumed raw materials are large in volume and various in types, rapid turnover is needed, the production operation is influenced by overlong detection time of the raw materials, and the raw materials cannot represent the compatibility of the raw materials with other raw materials of the concrete only by detecting the performances of the raw materials.
Disclosure of Invention
In summary, the present invention is directed to a method for detecting raw materials used in concrete production, so as to solve the problems of the prior art that the fluctuation of raw materials causes bleeding and strength does not meet design requirements, such as the common quality problems, and the detection of the concrete production service performance is too long when the raw materials are changed.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for detecting raw materials used in concrete production comprises the following steps:
step 1, preparing standard sample mortar; the method comprises the following specific steps:
step 1.1, determining a concrete reference mixing ratio;
step 1.2, adding the concrete admixture into a container filled with water, uniformly stirring, and then adding the mixture into the concrete mixture together to enable the slump and the fluidity of the concrete mixture to be within a standard range, wherein the concrete mixture is called a standard sample;
step 1.3, screening out mortar from the standard sample in the step 1.2 through a 5mm square hole sieve, and measuring the mortar with the mortar flow time less than 5s by using a mortar flow tester to serve as the standard sample mortar;
step 2, preparing reference mortar: replacing stones in the mix proportion with sands with the same specific surface area in the reference mix proportion in the step 1.1, and preparing reference mortar corresponding to the technical indexes of standard sample mortar without changing other raw materials, wherein the technical indexes refer to slump and expansion; wherein, the sand means the average grain diameter is less than or equal to 5mm, and the pebble means the average grain diameter is more than 5 mm.
Step 3, preparing test mortar: changing the type or the mixing amount of any component of the cementing material in the reference mortar, or changing the type or the mixing amount of an additive in the reference mortar, or changing the type or the mixing amount of sand, and keeping the single-factor change, wherein the obtained mortar is called test mortar;
step 4, qualification judgment: if the test indexes of the test mortar meet the test indexes of the standard sample mortar, the changed raw material types or the mixed amount are qualified, otherwise, the changed raw material types or the mixed amount are unqualified, and the test indexes refer to the time, bleeding property and strength of fluidity.
Further, the standard sample mortar is C30, the single use amount of the cementing material is 360kg, the sand rate is 55 percent, the water consumption is 165kg, the use amount of the additive accounts for 1.6-1.8 percent of the use amount of the cementing material, and the volume weight is 2350-2450 mm.
Further, the slump of the step 1.2 is 180mm-200mm, and the slump is 550mm-600 mm.
Further, the cementing material comprises one or more of cement, slag powder, fly ash, silica fume or phosphorous slag.
The invention has the beneficial effects that:
1. the method can quickly, conveniently and accurately judge the raw material fluctuation factors causing concrete bleeding and insufficient strength, generally only needs about 10 minutes, lays a foundation for solving the problem of insufficient concrete bleeding strength and providing countermeasures, and has wide application;
2. according to the invention, through single-factor change, whether the variety or the mixing amount of the single-factor change is qualified or not can be rapidly and accurately judged, for example, (1) the variety or the mixing amount of any component of the cementing material in the reference mortar is changed without changing other components such as sand, an additive and the like, and whether the variety or the mixing amount of the component is qualified or not can be judged; (2) other components such as the cementing material, the sand and the like are not changed, and only the type or the mixing amount of the additive is changed, so that whether the change of the type or the mixing amount of the additive is suitable for the existing production material can be judged; (3) the types of the sand are changed by keeping other components such as the cementing material, the additive and the like unchanged, so that whether the change of the types of the sand is proper or not can be judged. (1) The species mentioned in (1) to (3) include variations in composition or differences in lot.
Detailed Description
The present invention is further illustrated by the following examples, which are intended to be purely exemplary and are not intended to limit the scope of the invention, as various equivalent modifications of the invention will become apparent to those skilled in the art after reading the present application and which fall within the limits of the appended claims.
In the embodiment of the application, the replacement mode of the stones and the sands with the same specific surface area is that 100kg of middlings can replace 800kg of stones. The test index of the test mortar in the step 3 meets the test index of the standard sample mortar, namely the flow time of the test mortar is less than or equal to 5s, the bleeding property meeting the test mortar indicates that the slurry overflows around the test mortar, if so, the bleeding property and the segregation of the mortar are indicated, if not, the bleeding property of the test mortar meets the test index of the standard sample mortar, and meanwhile, the test mortar can be reflected to have good workability), and the strength meeting the concrete strength meeting the grade of the standard sample mortar.
Example 1 (replacement cement)
A method for detecting raw materials used in concrete production comprises the following steps:
step 1, preparing standard sample mortar; the method comprises the following specific steps:
step 1.1, determining the standard mixing proportion of the C30 concrete, wherein the single-formula dosage is as follows: 360kg of cementing material, 1020kg of medium sand, 850kg of stones (with the particle size of 5-25mm), 6kg of polycarboxylic acid high-efficiency water reducing agent as an additive and 165kg of water, wherein the cementing material is 220kg of No. P.O 52.5.5 cement, and the fly ash is 140kg of F.II; when the single dosage is reduced to 25L in the test, the dosage of the single dosage is trial-prepared, namely the weight of each component is reduced to 0.25 percent of the single dosage in the same proportion.
Step 1.2, adding a polycarboxylic acid high-efficiency water reducing agent into a container containing water, uniformly stirring, and then adding the polycarboxylic acid high-efficiency water reducing agent into a concrete mixture together to ensure that the slump of the concrete mixture is 180-200 mm and the expansibility is 550-600 mm, wherein the concrete mixture is called as a standard sample;
step 1.3, screening out mortar from the standard sample in the step 1.2 through a 5mm square hole sieve, and measuring the mortar with the mortar flow time less than 5s by using a mortar flow tester to serve as the standard sample mortar;
step 2, replacing the stones in the reference mixing ratio in the step 1.1 by sands with the same specific surface area, namely, 0kg of stones and 1020+106.25 kg of middlings, reducing the adaptive single-component dosage to 5L without changing other raw materials, namely, reducing the weight of each component to 0.5 percent of the single-component dosage in the same proportion, and preparing mortar corresponding to the technical indexes of standard sample mortar, wherein the technical indexes refer to slump and expansion; the trial-matching working procedures are greatly reduced, the detection efficiency is improved, the turnover efficiency of raw materials is accelerated, the usage amount of the materials can be reduced to a certain extent, the purposes of cost reduction and efficiency improvement are achieved, and the effects of energy conservation and emission reduction can be achieved.
And 3, replacing the cement No. P.O 52.5.5 in the step 2 with P.O42.5 cement, wherein the mortar is called test mortar, if the test index of the test mortar meets the test index of the standard sample mortar, the modified raw material is qualified, otherwise, the modified raw material is unqualified, the test index refers to the fluidity time, bleeding property and strength, and the test time in the steps is 10 min.
Example 2 (replacement sand type)
A method for detecting raw materials used in concrete production comprises the following steps:
step 1, preparing standard sample mortar; the method comprises the following specific steps:
step 1.1, determining the standard mixing proportion of the C30 concrete, wherein the single-formula dosage is as follows: 360kg of cementing material, 1020kg of medium sand, 850kg of stones (with the particle size of 5-25mm), 6kg of polycarboxylic acid high-efficiency water reducing agent as an additive and 165kg of water, wherein the cementing material is 220kg of No. P.O 52.5.5 cement, and the fly ash is 140kg of F.II; when the single dosage is reduced to 25L in the test, the dosage of the single dosage is trial-prepared, namely the weight of each component is reduced to 0.25 percent of the single dosage in the same proportion.
Step 1.2, adding a polycarboxylic acid high-efficiency water reducing agent into a container containing water, uniformly stirring, and then adding the polycarboxylic acid high-efficiency water reducing agent into a concrete mixture together to ensure that the slump of the concrete mixture is 180-200 mm and the expansibility is 550-600 mm, wherein the concrete mixture is called as a standard sample;
step 1.3, screening out mortar from the standard sample in the step 1.2 through a 5mm square hole sieve, and measuring the mortar with the mortar flow time less than 5s by using a mortar flow tester to serve as the standard sample mortar;
step 2, replacing the stones in the reference mixing ratio in the step 1.1 by sands with the same specific surface area, namely, 0kg of stones and 1020+106.25 kg of middlings, reducing the adaptive single-component dosage to 5L without changing other raw materials, namely, reducing the weight of each component to 0.5 percent of the single-component dosage in the same proportion, and preparing mortar corresponding to the technical indexes of standard sample mortar, wherein the technical indexes refer to slump and expansion; the trial-matching working procedures are greatly reduced, the detection efficiency is improved, the turnover efficiency of raw materials is accelerated, the usage amount of the materials can be reduced to a certain extent, the purposes of cost reduction and efficiency improvement are achieved, and the effects of energy conservation and emission reduction can be achieved;
and 3, replacing the lithologic sand of the limestone in the step 2 with basalt sand, wherein the mortar is called test mortar, if the test indexes of the test mortar meet the test indexes of standard sample mortar, the modified raw material is qualified, and if not, the modified raw material is unqualified, and the test indexes refer to the time, bleeding property and strength of fluidity. The testing time of the above steps is 9 min.
Example 3 (replacement of fly ash grade in cementitious Material)
A method for detecting raw materials used in concrete production comprises the following steps:
step 1, preparing standard sample mortar; the method comprises the following specific steps:
step 1.1, determining the standard mixing proportion of the C30 concrete, wherein the single-formula dosage is as follows: 360kg of cementing material, 1020kg of medium sand, 850kg of stones (with the particle size of 5-25mm), 6kg of polycarboxylic acid high-efficiency water reducing agent as an additive and 165kg of water, wherein the cementing material is 220kg of No. P.O 52.5.5 cement, and the fly ash is 140kg of F.II; when the single dosage is reduced to 25L in the test, the dosage of the single dosage is trial-prepared, namely the weight of each component is reduced to 0.25 percent of the single dosage in the same proportion.
Step 1.2, adding a polycarboxylic acid high-efficiency water reducing agent into a container containing water, uniformly stirring, and then adding the polycarboxylic acid high-efficiency water reducing agent into a concrete mixture together to ensure that the slump of the concrete mixture is 180-200 mm and the expansibility is 550-600 mm, wherein the concrete mixture is called as a standard sample;
step 1.3, screening out mortar from the standard sample in the step 1.2 through a 5mm square hole sieve, and measuring the mortar with the mortar flow time less than 5s by using a mortar flow tester to serve as the standard sample mortar;
step 2, replacing the stones in the reference mixing ratio in the step 1.1 by sands with the same specific surface area, namely, 0kg of stones and 1020+106.25 kg of middlings, reducing the adaptive single-component dosage to 5L without changing other raw materials, namely, reducing the weight of each component to 0.5 percent of the single-component dosage in the same proportion, and preparing mortar corresponding to the technical indexes of standard sample mortar, wherein the technical indexes refer to slump and expansion; the trial-matching working procedures are greatly reduced, the detection efficiency is improved, the turnover efficiency of raw materials is accelerated, the usage amount of the materials can be reduced to a certain extent, the purposes of cost reduction and efficiency improvement are achieved, and the effects of energy conservation and emission reduction can be achieved;
and 3, replacing the F.II fly ash in the step 2 with F.I fly ash, wherein the mortar is called test mortar, if the test index of the test mortar meets the test index of the standard sample mortar, the modified raw material is qualified, and if not, the modified raw material is unqualified, and the test index refers to the time, bleeding property and strength of fluidity. The testing time of the steps is 8 min.
Example 4 (alternative admixture type)
A method for detecting raw materials used in concrete production comprises the following steps:
step 1, preparing standard sample mortar; the method comprises the following specific steps:
step 1.1, determining the standard mixing proportion of the C30 concrete, wherein the single-formula dosage is as follows: 360kg of cementing material, 1020kg of medium sand, 850kg of stones (with the particle size of 5-25mm), 6kg of polycarboxylic acid high-efficiency water reducing agent as an additive and 165kg of water, wherein the cementing material is 220kg of No. P.O 52.5.5 cement, and the fly ash is 140kg of F.II; when the single dosage is reduced to 25L in the test, the dosage of the single dosage is trial-prepared, namely the weight of each component is reduced to 0.25 percent of the single dosage in the same proportion.
Step 1.2, adding a polycarboxylic acid high-efficiency water reducing agent into a container containing water, uniformly stirring, and then adding the polycarboxylic acid high-efficiency water reducing agent into a concrete mixture together to ensure that the slump of the concrete mixture is 180-200 mm and the expansibility is 550-600 mm, wherein the concrete mixture is called as a standard sample;
step 1.3, screening out mortar from the standard sample in the step 1.2 through a 5mm square hole sieve, and measuring the mortar with the mortar flow time less than 5s by using a mortar flow tester to serve as the standard sample mortar;
step 2, replacing the stones in the reference mixing ratio in the step 1.1 by sands with the same specific surface area, namely, 0kg of stones and 1020+106.25 kg of middlings, reducing the adaptive single-component dosage to 5L without changing other raw materials, namely, reducing the weight of each component to 0.5 percent of the single-component dosage in the same proportion, and preparing mortar corresponding to the technical indexes of standard sample mortar, wherein the technical indexes refer to slump and expansion; the trial-matching working procedures are greatly reduced, the detection efficiency is improved, the turnover efficiency of raw materials is accelerated, the usage amount of the materials can be reduced to a certain extent, the purposes of cost reduction and efficiency improvement are achieved, and the effects of energy conservation and emission reduction can be achieved;
and 3, replacing the polycarboxylic acid high-efficiency water reducing agent (named by the manufacturer) in the step 2 with a polycarboxylic acid high-performance water reducing agent (named by the manufacturer, different batches of additives of the same manufacturer or different manufacturers), wherein the mortar is named as test mortar, if the test index of the test mortar meets the test index of the standard sample mortar, the modified raw material is qualified, otherwise, the modified raw material is unqualified, and the test index refers to the time, bleeding property and strength of fluidity. The testing time of the steps is 8 min.
Example 5 (modification of admixture dosage)
A method for detecting raw materials used in concrete production comprises the following steps:
step 1, preparing standard sample mortar; the method comprises the following specific steps:
step 1.1, determining the standard mixing proportion of the C30 concrete, wherein the single-formula dosage is as follows: 360kg of cementing material, 1020kg of medium sand, 850kg of stones (with the particle size of 5-25mm), 6kg of polycarboxylic acid high-efficiency water reducing agent as an additive and 165kg of water, wherein the cementing material is 220kg of No. P.O 52.5.5 cement, and the fly ash is 140kg of F.II; when the single dosage is reduced to 25L in the test, the dosage of the single dosage is trial-prepared, namely the weight of each component is reduced to 0.25 percent of the single dosage in the same proportion.
Step 1.2, adding a polycarboxylic acid high-efficiency water reducing agent into a container containing water, uniformly stirring, and then adding the polycarboxylic acid high-efficiency water reducing agent into a concrete mixture together to ensure that the slump of the concrete mixture is 180-200 mm and the expansibility is 550-600 mm, wherein the concrete mixture is called as a standard sample;
step 1.3, screening out mortar from the standard sample in the step 1.2 through a 5mm square hole sieve, and measuring the mortar with the mortar flow time less than 5s by using a mortar flow tester to serve as the standard sample mortar;
step 2, replacing the stones in the reference mixing ratio in the step 1.1 by sands with the same specific surface area, namely, 0kg of stones and 1020+106.25 kg of middlings, reducing the adaptive single-component dosage to 5L without changing other raw materials, namely, reducing the weight of each component to 0.5 percent of the single-component dosage in the same proportion, and preparing mortar corresponding to the technical indexes of standard sample mortar, wherein the technical indexes refer to slump and expansion; the trial-matching working procedures are greatly reduced, the detection efficiency is improved, the turnover efficiency of raw materials is accelerated, the usage amount of the materials can be reduced to a certain extent, the purposes of cost reduction and efficiency improvement are achieved, and the effects of energy conservation and emission reduction can be achieved;
and 3, replacing 6kg of the polycarboxylic acid high-efficiency water reducing agent in the step 2 with 8kg of polycarboxylic acid high-efficiency water reducing agent, wherein the mortar is called test mortar, if the test index of the test mortar meets the test index of the standard sample mortar, the modified raw material is qualified, and if not, the modified raw material is unqualified, and the test index refers to the time, bleeding property and strength of fluidity. The testing time of the steps is 8 min.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (4)
1. A method for detecting raw materials used in concrete production is characterized by comprising the following steps:
step 1, preparing standard sample mortar; the method comprises the following specific steps:
step 1.1, determining a concrete reference mixing ratio;
step 1.2, adding the concrete admixture into a container filled with water, uniformly stirring, and then adding the mixture into the concrete mixture together to enable the slump and the fluidity of the concrete mixture to be within a standard range, wherein the concrete mixture is called a standard sample;
step 1.3, screening out mortar from the standard sample in the step 1.2 through a 5mm square hole sieve, and measuring the mortar with the mortar flow time less than 5s by using a mortar flow tester to serve as the standard sample mortar;
step 2, preparing reference mortar: replacing stones in the mix proportion with sands with the same specific surface area in the reference mix proportion in the step 1.1, and preparing reference mortar corresponding to the technical indexes of standard sample mortar without changing other raw materials, wherein the technical indexes refer to slump and expansion;
step 3, preparing test mortar: changing the type or the mixing amount of any component of the cementing material in the reference mortar, or changing the type or the mixing amount of an additive in the reference mortar, or changing the type or the mixing amount of sand, and keeping the single-factor change, wherein the obtained mortar is called test mortar;
step 4, qualification judgment: if the test indexes of the test mortar meet the test indexes of the standard sample mortar, the changed raw material types or the mixed amount are qualified, otherwise, the changed raw material types or the mixed amount are unqualified, and the test indexes refer to the time, bleeding property and strength of fluidity.
2. The method as claimed in claim 1, wherein the standard mortar is C30, the single dosage of the cementing material is 360kg, the sand rate is 55%, the water consumption is 165kg, the dosage of the admixture accounts for 1.6-1.8% of the dosage of the cementing material, and the volume weight is 2350-2450 mm.
3. The method for testing raw materials for concrete production according to claim 1, wherein the slump of step 1.2 is 180mm to 200mm and the slump is 550mm to 600 mm.
4. The method for detecting raw materials used in concrete production according to claim 1, wherein the cementing material comprises one or more of cement, slag powder, fly ash, silica fume or phosphorous slag.
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| CN113945454A (en) * | 2021-09-15 | 2022-01-18 | 广州粤建三和软件股份有限公司 | Concrete and raw material quality management method, device and equipment |
| CN114689808A (en) * | 2022-05-30 | 2022-07-01 | 珠江水利委员会珠江水利科学研究院 | Hydraulic engineering material detection and calculation method |
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| CN113945454A (en) * | 2021-09-15 | 2022-01-18 | 广州粤建三和软件股份有限公司 | Concrete and raw material quality management method, device and equipment |
| CN114689808A (en) * | 2022-05-30 | 2022-07-01 | 珠江水利委员会珠江水利科学研究院 | Hydraulic engineering material detection and calculation method |
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