CN111768817A - Method for confirming mixing proportion of high-performance concrete - Google Patents
Method for confirming mixing proportion of high-performance concrete Download PDFInfo
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- CN111768817A CN111768817A CN202010332241.1A CN202010332241A CN111768817A CN 111768817 A CN111768817 A CN 111768817A CN 202010332241 A CN202010332241 A CN 202010332241A CN 111768817 A CN111768817 A CN 111768817A
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000004574 high-performance concrete Substances 0.000 title claims abstract description 9
- 238000012360 testing method Methods 0.000 claims abstract description 43
- 239000004567 concrete Substances 0.000 claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 claims abstract description 17
- 239000000203 mixture Substances 0.000 claims abstract description 17
- 238000003756 stirring Methods 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000005086 pumping Methods 0.000 claims abstract description 4
- 238000004088 simulation Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 9
- 238000007689 inspection Methods 0.000 claims description 6
- 230000007774 longterm Effects 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 4
- 239000000654 additive Substances 0.000 abstract 1
- 230000000996 additive effect Effects 0.000 abstract 1
- 230000004907 flux Effects 0.000 abstract 1
- 238000012423 maintenance Methods 0.000 abstract 1
- 238000011056 performance test Methods 0.000 abstract 1
- 238000011020 pilot scale process Methods 0.000 abstract 1
- 238000012372 quality testing Methods 0.000 abstract 1
- 238000011160 research Methods 0.000 description 5
- 238000007493 shaping process Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000012790 confirmation Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16C—COMPUTATIONAL CHEMISTRY; CHEMOINFORMATICS; COMPUTATIONAL MATERIALS SCIENCE
- G16C60/00—Computational materials science, i.e. ICT specially adapted for investigating the physical or chemical properties of materials or phenomena associated with their design, synthesis, processing, characterisation or utilisation
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16C—COMPUTATIONAL CHEMISTRY; CHEMOINFORMATICS; COMPUTATIONAL MATERIALS SCIENCE
- G16C10/00—Computational theoretical chemistry, i.e. ICT specially adapted for theoretical aspects of quantum chemistry, molecular mechanics, molecular dynamics or the like
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- Engineering & Computer Science (AREA)
- Computing Systems (AREA)
- Theoretical Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Bioinformatics & Computational Biology (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The invention provides a method for confirming the mixing proportion of high-performance concrete, which comprises the following steps: testing the water requirement, the additive and the gas content of a standard laboratory with 30L; two basic mix ratios: according to the initial mixing proportion, a 150L analog simulation stirring system is adopted to carry out shrinkage, electric flux and working performance tests, and the initial mixing proportion is adjusted to determine a basic mixing proportion; the three-component production mixing ratio: according to the basic mix proportion, an 1800L pilot scale mixer is adopted, the size of a medium-sized component and a vibrating rod are vibrated and molded, a large mold, a small mold and a medium mold are molded simultaneously by pumping through a mixer truck transport pump truck, the natural condition maintenance with the molds is carried out for 7 days, test pieces with different strength grades are manufactured by the method, the homogeneity and the like are tested through a concrete quality testing wall and the test pieces, basic data are obtained, and the basic mix proportion is adjusted by combining the basic data to confirm the production mix proportion. The problem that the existing concrete mix proportion design is not suitable for actual production is solved, the distance between the test and the actual production and between the test and the construction is shortened, the test data are more representative, and the design mix proportion can be accurately applied to production. Belongs to the technical field of building engineering.
Description
Technical Field
The invention relates to a method for confirming the mixing proportion of high-performance concrete, belonging to the field of concrete test research.
Background
At present, in the research of concrete in a laboratory, most of mixing proportion confirmation methods adopt standard test equipment to adapt according to standards, but because the stirring mode, the forming mode, the sample volume and the like in the standard equipment and the method are greatly different from the actual production and construction of concrete, the physical and mechanical properties, the working performance, the long-term performance and the like of the concrete are obviously different, so that the mixing proportion after the laboratory confirmation is not suitable for production, and the mixing proportion is adjusted greatly in the production process.
Disclosure of Invention
The invention provides a method for confirming the mix proportion of high-performance concrete, which aims to solve the problem that the design of the existing mix proportion of the concrete is not suitable for actual production, and the distance between test and actual production and construction is shortened, so that the test data is more representative, and the design mix proportion can be accurately applied to production.
In order to solve the above problems, the method for confirming the mix proportion of the high-performance concrete is specifically as follows:
the method comprises the following steps: and stirring the powder material, the aggregate and water by a 30L standard experiment stirrer, taking the water consumption when the slump is tested to be more than 0mm and less than 1mm as the reference water consumption after stirring, and testing the compatibility and the water absorption of each material to obtain the initial mixing ratio.
Step two: feeding raw materials from the upper end of a stirrer through an analog simulation stirrer according to an initial mixing ratio, starting the stirrer to stir concrete, placing slurry into a test trolley to test the working performance after stirring is finished, forming a medium-sized test piece by adopting a vibrating rod, testing the physical and mechanical properties by core drilling sampling, and adjusting the initial mixing ratio according to the existing data to obtain a basic mixing ratio;
step three: the concrete is prepared by an 1800L pilot mixer according to the basic mix proportion, the concrete is prepared and discharged to a mixer truck of 14 cubic meters for two hours, then the mixer truck is pumped by a pump truck of 37 meters, the pumping performance and the working performance are tested, a standard test piece, a medium test piece and a quality inspection wall are formed by discharging, the physical and mechanical properties, the long-term performance and the volume stability are tested, a database is obtained, the adjustment is carried out according to the basic mix proportion and the database index, and the production mix proportion is confirmed.
Step two, adopting an effective volume of 225L and a discharge volume of 150L of a double horizontal shaft mixer, wherein a driving motor of the mixer is a variable frequency motor, the top and the bottom of the mixer are respectively provided with an openable feed inlet and a discharge outlet, concrete discharge is tested by adopting a mobile detection trolley, the double horizontal shaft mixer comprises a car body and two parallel rails, one ends of the two rails extend to the position right below the mixer, the car body is arranged on the two rails through a travelling wheel arranged at the bottom, the upper end surface of the car body is a horizontal operation platform, and the end part of the horizontal operation platform is provided with a material receiving groove extending to the position right below the mixer;
in the foregoing metering system, the test piece includes two types: 1. the medium-sized test piece with the size of 1000mm long, 250mm wide and 400mm high is molded by adopting a detachable combined groove structure die and a vibrating rod; 2. with the actual same component steel bar structure mould model in building site, the shaping size is 2000mm long, 1500mm wide, high 60 mm's quality inspection wall, the vibrting spear shaping.
Compared with the prior art, the invention has the following advantages:
1. the material weighing mode, the stirring mode, the pouring mode, the vibrating mode and the like are matched with the actual construction as much as possible, so that the experimental research is prevented from being separated from the actual production, the feasibility and the practicability of the research result are ensured, the research on the problems found in the production can be more practical, and the actual problems are solved in time;
2. the invention can form different components such as standard test pieces, medium test pieces, quality inspection walls and the like, can test physical and mechanical properties in different modes such as compressive strength test, rebound strength test and the like, corrects a strength curve and establishes a rebound curve which accords with local raw materials and production modes.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below, and it should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.
Examples
The embodiment provides a method for confirming the mixing proportion of high-performance concrete, which comprises the following specific steps:
the method comprises the following steps: and stirring the powder material, the aggregate and water by a 30L standard experiment stirrer, taking the water consumption when the slump is tested to be more than 0mm and less than 1mm as the reference water consumption after stirring, and testing the compatibility and the water absorption of each material to obtain the initial mixing ratio.
Step two: feeding raw materials from the upper end of a stirrer through an analog simulation stirrer, starting the stirrer to stir concrete, placing slurry into a test trolley to test the working performance after stirring is finished, forming a medium-sized test piece by adopting a vibrating rod, and testing the physical and mechanical properties by core drilling sampling to obtain a basic mixing ratio;
the concrete discharge test device is characterized in that the effective volume of a double-horizontal-shaft mixer is 225L, the discharge volume is 150L, a driving motor of the mixer is a variable frequency motor, the top and the bottom of the mixer are respectively provided with an openable feed inlet and a discharge outlet, the concrete discharge is tested by adopting a mobile detection trolley, the concrete discharge test device comprises a trolley body and two parallel trolley rails, one ends of the two trolley rails extend to the position right below the mixer, the trolley body is arranged on the two trolley rails through a travelling wheel arranged at the bottom, the upper end surface of the trolley body is a horizontal operation table, and the end part of the horizontal operation table is provided with a material receiving groove extending;
step three: the concrete is prepared by an 1800L pilot plant mixer, the prepared concrete is discharged to a mixer truck of 14 cubic meters for mixing for two hours, then the concrete is pumped by a pump truck of 37 meters, the pumping performance and the working performance are tested, the standard test piece, the medium test piece and the quality inspection wall are formed by discharging, the physical and mechanical properties, the long-term performance and the volume stability are tested, a database is obtained, and the production mixing ratio is confirmed.
The test piece includes two kinds: 1. the medium-sized test piece with the size of 1000mm long, 250mm wide and 400mm high is molded by adopting a detachable combined groove structure die and a vibrating rod; 2. with the actual same component steel bar structure mould model in building site, the shaping size is 2000mm long, 1500mm wide, high 60 mm's quality inspection wall, the vibrting spear shaping.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (2)
1. A method for confirming the mixing proportion of high-performance concrete is characterized by comprising the following specific steps:
the method comprises the following steps: and stirring the powder material, the aggregate and water by a 30L standard experiment stirrer, taking the water consumption when the slump is tested to be more than 0mm and less than 1mm as the reference water consumption after stirring, and testing the compatibility and the water absorption of each material to obtain the initial mixing ratio.
Step two: feeding raw materials from the upper end of a stirrer through an analog simulation stirrer according to an initial mixing ratio, starting the stirrer to stir concrete, placing slurry into a test trolley to test the working performance after stirring is finished, forming a medium-sized test piece by adopting a vibrating rod, testing the physical and mechanical properties by core drilling sampling, and adjusting the initial mixing ratio according to the existing data to obtain a basic mixing ratio;
step three: the concrete is prepared by an 1800L pilot mixer according to the basic mix proportion, the concrete is prepared and discharged to a mixer truck of 14 cubic meters for two hours, then the mixer truck is pumped by a pump truck of 37 meters, the pumping performance and the working performance are tested, a standard test piece, a medium test piece and a quality inspection wall are formed by discharging, the physical and mechanical properties, the long-term performance and the volume stability are tested, a database is obtained, the adjustment is carried out according to the basic mix proportion and the database index, and the production mix proportion is confirmed.
2. The method for confirming the mix proportion of the high-performance concrete according to claim 1, wherein: in the second step, adopt two horizontal axis mixer effective volume 225L, ejection of compact volume 150L, the driving motor of mixer is inverter motor, the top and the bottom of mixer are provided with feed inlet and the discharge gate that can open the formula respectively, the concrete ejection of compact adopts portable detection platform truck to test, including automobile body and two rails that are parallel to each other, the one end of two rails extends under the mixer, the walking wheel that the automobile body set up through the bottom sets up on two rails, the up end of automobile body is horizontal operation platform, the tip of horizontal operation platform is provided with the silo that connects that extends under the mixer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010332241.1A CN111768817A (en) | 2020-04-24 | 2020-04-24 | Method for confirming mixing proportion of high-performance concrete |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010332241.1A CN111768817A (en) | 2020-04-24 | 2020-04-24 | Method for confirming mixing proportion of high-performance concrete |
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| CN111768817A true CN111768817A (en) | 2020-10-13 |
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| CN202010332241.1A Pending CN111768817A (en) | 2020-04-24 | 2020-04-24 | Method for confirming mixing proportion of high-performance concrete |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113752375A (en) * | 2021-09-15 | 2021-12-07 | 保利长大工程有限公司 | UHPC (ultra high performance polycarbonate) segment beam prefabrication method |
Citations (6)
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|---|---|---|---|---|
| JPH07227832A (en) * | 1994-02-21 | 1995-08-29 | Tokyo Electric Power Co Inc:The | Method and apparatus for quality control of concrete |
| CN106446490A (en) * | 2016-03-24 | 2017-02-22 | 中国十七冶集团有限公司 | Concrete mixing proportion design method capable of fully utilizing performance of each component material |
| CN107471402A (en) * | 2017-07-10 | 2017-12-15 | 中国建材检验认证集团贵州有限公司 | A kind of high performance concrete pilot system and test method |
| CN108229005A (en) * | 2017-12-29 | 2018-06-29 | 上海建工集团股份有限公司 | A kind of regeneration concrete of more than strength grade C50 and preparation method thereof |
| CN109553729A (en) * | 2018-11-28 | 2019-04-02 | 中国建材检验认证集团厦门宏业有限公司 | A kind of anti-chamotte mould water-reducing agent of both sexes and preparation method thereof |
| CN110451891A (en) * | 2019-08-27 | 2019-11-15 | 黑龙江盛世新宇高新技术开发有限公司 | Light high strength concrete mixing proportion design method |
-
2020
- 2020-04-24 CN CN202010332241.1A patent/CN111768817A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07227832A (en) * | 1994-02-21 | 1995-08-29 | Tokyo Electric Power Co Inc:The | Method and apparatus for quality control of concrete |
| CN106446490A (en) * | 2016-03-24 | 2017-02-22 | 中国十七冶集团有限公司 | Concrete mixing proportion design method capable of fully utilizing performance of each component material |
| CN107471402A (en) * | 2017-07-10 | 2017-12-15 | 中国建材检验认证集团贵州有限公司 | A kind of high performance concrete pilot system and test method |
| CN108229005A (en) * | 2017-12-29 | 2018-06-29 | 上海建工集团股份有限公司 | A kind of regeneration concrete of more than strength grade C50 and preparation method thereof |
| CN109553729A (en) * | 2018-11-28 | 2019-04-02 | 中国建材检验认证集团厦门宏业有限公司 | A kind of anti-chamotte mould water-reducing agent of both sexes and preparation method thereof |
| CN110451891A (en) * | 2019-08-27 | 2019-11-15 | 黑龙江盛世新宇高新技术开发有限公司 | Light high strength concrete mixing proportion design method |
Non-Patent Citations (1)
| Title |
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| 王转等: "土木工程材料检测", 北京理工大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113752375A (en) * | 2021-09-15 | 2021-12-07 | 保利长大工程有限公司 | UHPC (ultra high performance polycarbonate) segment beam prefabrication method |
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Application publication date: 20201013 |