CN112964596A - Method for testing segregation rate of coarse aggregate - Google Patents
Method for testing segregation rate of coarse aggregate Download PDFInfo
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- CN112964596A CN112964596A CN202110237081.7A CN202110237081A CN112964596A CN 112964596 A CN112964596 A CN 112964596A CN 202110237081 A CN202110237081 A CN 202110237081A CN 112964596 A CN112964596 A CN 112964596A
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- 238000005204 segregation Methods 0.000 title claims abstract description 47
- 238000012360 testing method Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000000203 mixture Substances 0.000 claims abstract description 99
- 238000001514 detection method Methods 0.000 claims abstract description 33
- 239000004568 cement Substances 0.000 claims abstract description 23
- 239000004576 sand Substances 0.000 claims abstract description 19
- 238000005303 weighing Methods 0.000 claims abstract description 13
- 238000011049 filling Methods 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 7
- 239000000843 powder Substances 0.000 claims abstract description 7
- 239000004575 stone Substances 0.000 claims abstract description 6
- 238000012216 screening Methods 0.000 claims abstract description 4
- 238000010998 test method Methods 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 8
- 239000011398 Portland cement Substances 0.000 claims description 5
- 230000009191 jumping Effects 0.000 claims description 3
- 238000009991 scouring Methods 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 3
- 239000000654 additive Substances 0.000 claims description 2
- 230000000996 additive effect Effects 0.000 claims description 2
- 238000007580 dry-mixing Methods 0.000 claims description 2
- 230000007613 environmental effect Effects 0.000 claims description 2
- 239000012615 aggregate Substances 0.000 description 52
- 238000002156 mixing Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The invention provides a method for testing segregation rate of dry blend coarse aggregate, which comprises the following steps: s101, stirring cement, sand and stones according to the mixture ratio of the dry mixture to obtain the dry mixture; s102, weighing the stirred dry mixture, and filling a detection barrel which is divided into two sections; s103, vibrating a detection barrel filled with dry mixed materials; s104, removing the detection barrels in two sections, screening out powder and fine aggregate from the dry mixture in each section of detection barrel, and weighing the coarse aggregate on the screen to obtain the weight of the coarse aggregate of the dry mixture in the upper section and the lower section respectively; and S105, obtaining the segregation rate of the coarse aggregate. The coarse aggregate segregation rate testing method can provide a dry mixture coarse aggregate segregation rate testing method for preventing underwater foundation scour in projects such as bridges and offshore wind power, and the quality of dry mixtures can be effectively controlled.
Description
Technical Field
The invention belongs to the technical field of cement concrete materials, and particularly relates to a method for testing segregation resistance of bagged dry mixtures for underwater repair.
Background
The bagged dry mixture for the underwater foundation is prepared by uniformly mixing cement, sand and stones on land according to a certain proportion, filling the mixture into a soil engineering bag according to the weight requirement, throwing and filling the mixture into an area with the design requirement, and solidifying and hardening the mixture into a plain concrete block under water to play a role in preventing the foundation from scouring. The bagged dry mixture can adapt to various complex terrains, particularly working conditions of deep water bank protection, bottom protection and the like without filling cofferdams, and the construction process can also reduce impact damage to pile foundation anti-corrosion coatings and anode blocks during construction throwing. The manufacturing process, the hydration hardening principle and the performance of the bagged dry mixture repaired underwater have obvious differences from common concrete, the coarse aggregate can be separated from the dry mixture in the manufacturing process and the transportation of the dry mixture, the nonuniformity of the dry mixture is caused, the quality of the dry mixture is seriously influenced, and the anti-separation performance of the coarse aggregate of the dry mixture needs to be detected by a reasonable method, so that whether the quality of the dry mixture meets the quality requirement is judged.
The dry mixture is composed of cement, fine aggregate, coarse aggregate and the like. Because the dry mixture has obvious difference with the concrete that generally mixes and make, the dry mixture itself does not have cohesiveness, and the coarse aggregate easily separates out from the dry mixture component in dry mixture preparation and transportation to seriously influence the homogeneity and the quality of dry mixture. Therefore, a method for testing the segregation resistance of the dry mixture needs to be established so as to ensure the engineering quality of the dry mixture.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for testing the segregation rate of coarse aggregates, which can overcome the defect that the conventional method for detecting the segregation resistance of the scour-prevention bagged dry mixture of the underwater foundation does not exist and ensure the engineering quality of the dry mixture.
The invention provides a method for testing segregation rate of coarse aggregate, which comprises the following steps:
s101, stirring cement, sand and stones according to the mixture ratio of the dry mixture to obtain the dry mixture;
s102, weighing the stirred dry mixture, and filling a detection barrel which is divided into two sections;
s103, vibrating a detection barrel filled with dry mixed materials;
s104, removing the detection barrels in two sections, screening out powder and fine aggregate from the dry mixture in each section of detection barrel, and weighing the coarse aggregate on the screen to obtain the weight of the coarse aggregate of the dry mixture in the upper section and the lower section respectively;
s105, obtaining the segregation rate of the coarse aggregate, wherein the segregation rate of the coarse aggregate is calculated according to the following formula:
in the formula: f. ofmThe segregation rate of the coarse aggregate;
m1the mass of the coarse aggregate in the dry mixture of the upper section;
m2the mass of the coarse aggregate in the dry mixture at the lower section.
The method for testing the segregation rate of the coarse aggregate has the beneficial effects that: through research of a dry mixture segregation resistance test method, the dry mixture segregation resistance test method in the bag for underwater foundation repair is established, a dry mixture coarse aggregate segregation rate test method can be provided for underwater foundation repair and protection of projects such as bridges and offshore wind power, quality of the dry mixture is effectively controlled, and the technical blank in the field is filled.
Preferably, in step S101, the ambient temperature is 20 ± 2 ℃; the cement, sand and gravel are put into a 30-liter or 60-liter forced stirrer to be stirred.
Preferably, in step S101, the cement of the dry mixture is portland cement with a strength not lower than 42.5; the sand is river sand or machine-made sand with fineness modulus of 2.0-3.0; the maximum grain size of the coarse aggregate is not more than 40 mm; the stirring time is controlled to be 120-150 seconds.
Preferably, in step S102, the stirred dry mixture is weighed, and a hopper is used to fill the detection barrel and trowel the dry mixture; the cylindrical metal detection barrel with the diameter of 120-150 mm is divided into two sections, the height of each section is 200-300 mm, and the cylindrical metal detection barrel is composed of movable fasteners.
Preferably, in step S103, the detection barrel filled with dry blend is placed on a vibration table, the vibration table is started, and the vibration table is closed after vibrating for 5-20 seconds; the vibration table is a jumping vibration table, the amplitude is 10 cm-20 cm, and the vibration table vibrates for 1 time per second. .
Preferably, in step S104, the detection barrels are removed in two sections, the dry mixture in each section of detection barrel is put into a square-hole sieve with the aperture of 5 mm, powder and fine aggregate are sieved out, the coarse aggregate on the sieve is weighed, and the weight m1 and m2 of the coarse aggregate of the dry mixture in the upper section and the lower section are obtained respectively.
Preferably, each dry blend is tested for 3 segregation rates, the arithmetic mean of which is taken.
Preferably, the dry mixture is an underwater foundation bagged dry mixture and consists of cement, fine aggregate, coarse aggregate and an additive.
Drawings
FIG. 1 is a schematic flow diagram of a method according to an embodiment of the invention;
FIG. 2 is a schematic diagram showing the relationship between the cement consumption and segregation rate of dry mixes with different aggregate sizes according to the embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
The method for testing the segregation rate of the coarse aggregate is suitable for all dry mixtures at present. In this embodiment, the dry mix is packed in bags on an underwater basis. The method is particularly used for testing any dry mixture and does not limit the method.
The method for testing the segregation rate of the coarse aggregate comprises the following steps:
s101, controlling the environmental temperature of a laboratory to be 20 +/-2 ℃, and stirring cement, sand and stones in a 30L or 60L forced stirrer according to the mixing ratio of the dry mixture to obtain an underwater basic anti-scouring bagged dry mixture;
the cement of the dry mixture is ordinary portland cement with the strength not lower than 42.5, and the sand is river sand or machine-made sand with the fineness modulus of 2.0-3.0; the maximum grain size of the coarse aggregate is not more than 40 mm; the stirring time is controlled to be 120-150 seconds.
S102, weighing the stirred dry mixture, filling a detection barrel with a hopper and leveling;
the cylindrical metal detection barrel with the diameter of 120-150 mm is divided into two sections, the height of each section is 200-300 mm, and the cylindrical metal detection barrel is composed of movable fasteners.
S103, placing the detection barrel filled with the dry mixing materials on a vibration table, starting the vibration table, vibrating for 5-20 seconds and closing the vibration table;
the vibration table is a jumping vibration table, the amplitude is 10 cm-20 cm, and the vibration table vibrates for 1 time per second.
S104, removing the detection barrels in two sections, putting the dry mixture in each section of detection barrel into a square-hole sieve with the aperture of 5 mm, sieving out powder and fine aggregate, weighing the coarse aggregate on the sieve, and respectively obtaining the weights m1 and m2 of the coarse aggregate of the dry mixture in the upper section and the dry mixture in the lower section;
the square-hole sieve is a 5 mm square-hole sieve and meets the quality requirement of Standard Square-hole Sieve (GB/T6003.9).
S105, calculating the segregation rate of the coarse aggregate according to the following formula:
in the formula: f. ofmThe segregation rate (%) of the coarse aggregate is accurate to 0.1 percent;
m1-mass (g) of coarse aggregate in the upper dry blend;
m2-mass (g) of coarse aggregate in the next stage of dry mix.
Each dry blend was tested for 3 segregation rates, the arithmetic mean of which was taken.
The method of the embodiment requires raw materials and equipment:
cement: strength grade 42.5 portland cement.
Fine aggregate (sand): the medium sand with the fineness modulus of 2.4 contains 0.6 percent of mud and 0.5 percent of mud blocks.
Coarse aggregate (stone): 5-10 mm, 5-25 mm and 5-31.5 mm.
Balance: an electronic balance weighing 10kg and having a sensitivity of 5g was used.
And (4) testing and screening: a square mesh screen with a nominal diameter of 5 mm.
30L concrete mixer.
Concrete shaking table.
A cylindrical metal drum with a diameter of 150 mm and a height of 400 mm.
In the following, a laboratory test is described as an example:
the temperature of the laboratory was controlled at 20. + -. 5 ℃.
And (3) stirring the dry mixture, namely adding the weighed cement, sand and aggregate into a concrete mixer respectively for stirring, wherein the stirring time is controlled to be 120-150 seconds.
Filling the dry mixture into a metal barrel: and weighing the stirred dry mixture, filling the detection barrel with a hopper, and trowelling.
Put the shaking table on the detection bucket that will fill with the dry blend, close the shaking table after the vibration 10 seconds, divide two sections to demolish and detect the bucket.
And (3) filling the dry mixture in each section of detection barrel into a square-hole sieve with the aperture of 5 mm, sieving to remove powder and fine aggregate, and weighing the coarse aggregate on the sieve to obtain the weight m1 and the weight m2 of the coarse aggregate of the dry mixture in the upper section and the lower section respectively.
And calculating the segregation rate of the dry mixture, and respectively calculating the segregation rate of the coarse aggregate of the dry mixture.
The dry mixture of this embodiment is proportioned:
materials such as 42.5 ordinary portland cement are adopted to respectively prepare dry mixtures, and the mixing ratio of the dry mixtures is shown in table 1.
TABLE 1 Dry blend ratio (kg/m)3)
The segregation test result of the coarse aggregate is as follows:
the results of the test of the segregation rate of the dry mixture coarse aggregate with different cement dosages are shown in table 2, and the relationship between the cement dosages and the segregation rate is shown in fig. 1. As can be seen from Table 2 and FIG. 1, as the cement consumption of the dry mixture increases, the segregation rate of the coarse aggregate increases continuously, and when the cement consumption reaches 300kg/m3The increase in the segregation rate is relatively large. The test results also show that the segregation rate of the coarse aggregate has a tendency to increase continuously as the particle size of the aggregate increases. Therefore, in order to control the segregation rate of the coarse aggregate of the dry mixture, the amount of cement should be properly controlled, and the particle size of the coarse aggregate should be properly controlled.
TABLE 2 segregation (%)% of dry blend coarse aggregate at different cement dosages
The foregoing is considered as illustrative of the preferred embodiments of the invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (8)
1. A method for testing segregation rate of coarse aggregate is characterized by comprising the following steps:
s101, stirring cement, sand and stones according to the mixture ratio of the dry mixture to obtain the dry mixture;
s102, weighing the stirred dry mixture, and filling a detection barrel which is divided into two sections;
s103, vibrating a detection barrel filled with dry mixed materials;
s104, removing the detection barrels in two sections, screening out powder and fine aggregate from the dry mixture in each section of detection barrel, and weighing the coarse aggregate on the screen to obtain the weight of the coarse aggregate of the dry mixture in the upper section and the lower section respectively;
s105, obtaining the segregation rate of the coarse aggregate, wherein the segregation rate of the coarse aggregate is calculated according to the following formula:
in the formula: f. ofmThe segregation rate of the coarse aggregate;
m1the mass of the coarse aggregate in the dry mixture of the upper section;
m2the mass of the coarse aggregate in the dry mixture at the lower section.
2. The coarse aggregate segregation rate test method according to claim 1,
in the step S101, the environmental temperature is 20 +/-2 ℃;
the cement, sand and gravel are put into a 30-liter or 60-liter forced stirrer to be stirred.
3. The coarse aggregate segregation rate test method according to claim 2,
in the step S101, the cement of the dry mixture is Portland cement with the strength not lower than 42.5;
the sand is river sand or machine-made sand with fineness modulus of 2.0-3.0;
the maximum grain size of the coarse aggregate is not more than 40 mm;
the stirring time is 120-150 seconds.
4. The coarse aggregate segregation rate test method according to claim 3,
step S102, weighing the stirred dry mixture, filling the detection barrel with a hopper and leveling;
the cylindrical metal detection barrel with the diameter of 120-150 mm is divided into two sections, the height of each section is 200-300 mm, and the cylindrical metal detection barrel is composed of movable fasteners.
5. The coarse aggregate segregation rate test method according to claim 4,
in the step S103, placing the detection barrel filled with dry mixing materials on a vibration table, starting the vibration table, vibrating for 5-20 seconds and closing the vibration table;
the vibration table is a jumping vibration table, the amplitude is 10 cm-20 cm, and the vibration table vibrates for 1 time per second.
6. The coarse aggregate segregation rate test method according to claim 5,
and S104, removing the detection barrels in two sections, filling the dry mixture in each section of detection barrel into a square-hole sieve with the aperture of 5 mm, removing powder and fine aggregate by sieving, and weighing the coarse aggregate on the sieve to obtain the weight m1 and the weight m2 of the coarse aggregate of the dry mixture in the upper section and the dry mixture in the lower section respectively.
7. The coarse aggregate segregation rate test method according to claim 6,
each dry blend was tested for 3 coarse aggregate segregation rates, the arithmetic mean of which was taken.
8. The coarse aggregate segregation rate test method according to claim 7,
an anti-scouring bagged dry mixture for an underwater foundation consists of cement, fine aggregate, coarse aggregate and an additive.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003106973A (en) * | 2001-09-28 | 2003-04-09 | Fujita Corp | Testing method for evaluating segregation resistance of concrete |
| CN201016975Y (en) * | 2007-03-16 | 2008-02-06 | 中南大学 | Self-dense concrete mixture stability testing device |
| CN102680666A (en) * | 2012-05-06 | 2012-09-19 | 山西省交通科学研究院 | Method for evaluating disintegration degree of road cement concrete |
| CN102967519A (en) * | 2012-11-14 | 2013-03-13 | 宁波职业技术学院 | Device and method for detecting homogeneity of lightweight aggregate concrete |
| CN106442945A (en) * | 2016-09-05 | 2017-02-22 | 中交第四航务工程局有限公司 | Test method for evaluating layering condition of fresh concrete on site and influence of layering on hardened concrete |
| CN108982820A (en) * | 2018-07-19 | 2018-12-11 | 北京工业大学 | A kind of device and method of construction site detection concrete disintegration rate and stability |
| CN109884285A (en) * | 2019-03-06 | 2019-06-14 | 山东省交通科学研究院 | A kind of test method for Under Concrete isolation degree of vibrating |
| CN211014289U (en) * | 2017-12-11 | 2020-07-14 | 内蒙古工业大学 | Lightweight aggregate concrete layering degree measuring cylinder |
-
2021
- 2021-03-03 CN CN202110237081.7A patent/CN112964596A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003106973A (en) * | 2001-09-28 | 2003-04-09 | Fujita Corp | Testing method for evaluating segregation resistance of concrete |
| CN201016975Y (en) * | 2007-03-16 | 2008-02-06 | 中南大学 | Self-dense concrete mixture stability testing device |
| CN102680666A (en) * | 2012-05-06 | 2012-09-19 | 山西省交通科学研究院 | Method for evaluating disintegration degree of road cement concrete |
| CN102967519A (en) * | 2012-11-14 | 2013-03-13 | 宁波职业技术学院 | Device and method for detecting homogeneity of lightweight aggregate concrete |
| CN106442945A (en) * | 2016-09-05 | 2017-02-22 | 中交第四航务工程局有限公司 | Test method for evaluating layering condition of fresh concrete on site and influence of layering on hardened concrete |
| CN211014289U (en) * | 2017-12-11 | 2020-07-14 | 内蒙古工业大学 | Lightweight aggregate concrete layering degree measuring cylinder |
| CN108982820A (en) * | 2018-07-19 | 2018-12-11 | 北京工业大学 | A kind of device and method of construction site detection concrete disintegration rate and stability |
| CN109884285A (en) * | 2019-03-06 | 2019-06-14 | 山东省交通科学研究院 | A kind of test method for Under Concrete isolation degree of vibrating |
Non-Patent Citations (4)
| Title |
|---|
| 张云国等: "自密实轻骨料混凝土抗离析性控制与试验方法", 《大连理工大学学报》 * |
| 张勇 等: "自密实混凝土稳定性评价方法研究进展", 《混凝土》 * |
| 李渝军等: "泵送高强轻骨料混凝土的抗离析性能", 《混凝土》 * |
| 李渝军等: "泵送高强轻骨料混凝土的抗离析性能的试验研究", 《四川建筑科学研究》 * |
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