CN220305303U - Rock column method alkali activity testing arrangement - Google Patents
Rock column method alkali activity testing arrangement Download PDFInfo
- Publication number
- CN220305303U CN220305303U CN202321490209.1U CN202321490209U CN220305303U CN 220305303 U CN220305303 U CN 220305303U CN 202321490209 U CN202321490209 U CN 202321490209U CN 220305303 U CN220305303 U CN 220305303U
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- China
- Prior art keywords
- rock column
- test piece
- strip
- shaped groove
- rock
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- 238000012360 testing method Methods 0.000 title claims abstract description 54
- 239000011435 rock Substances 0.000 title claims abstract description 43
- 239000003513 alkali Substances 0.000 title claims abstract description 25
- 230000000694 effects Effects 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000002585 base Substances 0.000 claims description 7
- 239000000758 substrate Substances 0.000 claims description 5
- 229910000514 dolomite Inorganic materials 0.000 abstract description 5
- 239000010459 dolomite Substances 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 244000137852 Petrea volubilis Species 0.000 description 1
- 229910052910 alkali metal silicate Inorganic materials 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model provides a rock column alkali activity testing device, which is characterized in that a strip-shaped groove is arranged to accommodate a rock column test piece, a plurality of clamps are arranged to fix the rock column test piece accommodated in the strip-shaped groove, the end parts of measuring arms of a micrometer are arranged to be spherical, spherical ends are limited in the strip-shaped groove and respectively prop against the two ends of the rock column test piece, the length measurement of the rock column test piece is carried out by matching the groove and the clamps, the data fluctuation caused by insufficient level of the two ends of the test piece in different age periods is avoided, the problem that the two ends of the test piece with brittleness of dolomite are difficult to process to absolute level is solved, and the test result is more accurate.
Description
Technical Field
The utility model relates to the technical field of alkali activity detection of carbonate aggregates in hydro-electric engineering, in particular to a rock column method alkali activity testing device.
Background
The aggregate alkali activity reaction means that under certain conditions, concrete aggregate can react with alkali substances in cement, admixture and the like in concrete, and can cause expansion, cracking and even damage of a concrete structure. The alkali-activated reaction of aggregate is one of the important factors affecting the durability of concrete, and the damage caused by the alkali-activated reaction is difficult to repair and save, so that the economic loss is difficult to estimate.
In order to avoid the occurrence of the above situation, when the source is selected, the alkali activity of the aggregate needs to be tested, and the alkali-active aggregate is generally classified into two types: one is an aggregate containing amorphous or crystalline incomplete silica, referred to as alkali-silicate reactive aggregate; the other is a microcrystalline dolomite aggregate having a specific structural configuration, called alkali-carbonate reactive aggregate.
In the existing industry standard of the test procedure of hydraulic concrete sandstone aggregate, namely DL/T5151-2014, the alkali activity test of carbonate aggregate adopts a rock column method, a cylindrical drilling machine is used for taking one test piece from three mutually perpendicular directions, the test piece is a cylinder, the diameter is 9 mm +/-1 mm, the length is 35 mm +/-5 mm, and the surface of the test piece is prevented from deteriorating due to polishing or other certain actions during processing, so that the rate of entering the rock sample by alkali solution is influenced. And after the test pieces are numbered, a length measuring instrument is adopted to measure the reference length and the length of each age.
Because the rock column method sample is smaller, insufficient level of both ends of the sample often occurs in the sample preparation process, dolomite is brittle, the sample is easy to break in the process of fine leveling by adopting core sample fine leveling equipment, and the surface polishing is easy to cause to influence the test; the two ends of the artificial sand paper cannot be polished to be flat, and when the length is measured by a length measuring instrument, the data fluctuation is extremely large, and the influence on the measurement result is extremely large.
Disclosure of Invention
The utility model aims to provide a rock column method alkali activity testing device, which aims at solving the problem that dolomite is brittle and the two ends of a test piece are extremely difficult to process to an absolute level.
For this purpose, the above object of the present utility model is achieved by the following technical solutions:
a rock column method alkali activity testing arrangement, its characterized in that: the rock column alkali activity testing device comprises a substrate, wherein a strip-shaped groove is formed in the substrate and used for accommodating a rock column test piece;
a plurality of clamps are arranged in the grooves and are contracted or expanded through the fastening knob;
the base plate is also provided with a micrometer, the measuring arm of the micrometer is provided with a spherical end head, and the spherical end head is limited in the strip-shaped groove and respectively abuts against two ends of the rock column test piece.
The utility model can also adopt or combine the following technical proposal when adopting the technical proposal:
as a preferred technical scheme of the utility model: the micrometer is a digital display micrometer.
As a preferred technical scheme of the utility model: the end of the measuring arm of the micrometer is a spherical part with the diameter of 10 mm.
As a preferred technical scheme of the utility model: the clamp is located at the center of the base plate to clamp the middle area of the rock column test piece.
As a preferred technical scheme of the utility model: the inner side surface of the strip-shaped groove is a semi-cylindrical surface.
As a preferred technical scheme of the utility model: the depth of the strip-shaped groove is 5 mm.
The utility model provides a rock column alkali activity testing device, which is characterized in that a strip-shaped groove is arranged to accommodate a rock column test piece, a plurality of clamps are arranged to fix the rock column test piece accommodated in the strip-shaped groove, the end parts of measuring arms of a micrometer are arranged to be spherical, spherical ends are limited in the strip-shaped groove and respectively prop against the two ends of the rock column test piece, the length measurement of the rock column test piece is carried out by matching the groove and the clamps, the data fluctuation caused by insufficient level of the two ends of the test piece in different age periods is avoided, the problem that the two ends of the test piece with brittleness of dolomite are difficult to process to absolute level is solved, and the test result is more accurate.
Drawings
Fig. 1 is a diagram of a rock column alkali activity test device provided by the utility model.
Fig. 2 is a pictorial view of a clip.
Detailed Description
The utility model will be described in further detail with reference to the drawings and specific embodiments.
As shown in fig. 1-2, the rock column alkali activity testing device comprises a base plate 1, a strip-shaped groove 2, a digital display micrometer 4, a clamp 3 and a fastening knob 31.
The substrate 1 is made of metal material, and has a length of 400 mm, a width of 200 mm and a height of 20 mm.
The strip-shaped groove 2 is a semicircle with the diameter of 10 and mm and is positioned at the center of the upper part of the base plate 1.
The end of the measuring arm of the digital display micrometer 4 is made of spherical metal with the diameter of 10 mm, and the measuring arm is matched with the strip-shaped groove 2 to measure the length of the rock column test piece.
The clamp 3 is made of stainless steel, and the diameter of the clamp 3 can be adjusted by rotating the fastening knob 31, so that a rock column test piece can be held tightly or loosened.
When the rock column test piece is tested for length, firstly, the rock column test piece is placed in the strip-shaped groove 2 in the base plate 1, the clamp 3 is loosened through the fastening knob 31, the rock column test piece is placed in the clamp 3, the clamp 3 is positioned in the middle of the rock column test piece, the clamp 3 is fastened through the fastening knob 31, the rock column test piece is fixed in the strip-shaped groove 2, the spherical end of the measuring arm of the digital micrometer 4 is placed in the strip-shaped groove 2, the two ends of the spherical end of the measuring arm of the digital micrometer 4 are adjusted to be in contact with the rock column test piece, the length of the rock column test piece is read, and the expansion rate of the test piece is calculated according to the lengths of different ages.
The above detailed description is intended to illustrate the present utility model by way of example only and not to limit the utility model to the particular embodiments disclosed, but to limit the utility model to the precise embodiments disclosed, and any modifications, equivalents, improvements, etc. that fall within the spirit and scope of the utility model as defined by the appended claims.
Claims (6)
1. A rock column method alkali activity testing arrangement, its characterized in that: the rock column alkali activity testing device comprises a substrate, wherein a strip-shaped groove is formed in the substrate and used for accommodating a rock column test piece;
a plurality of clamps are arranged in the grooves and are contracted or expanded through the fastening knob;
the base plate is also provided with a micrometer, the measuring arm of the micrometer is provided with a spherical end head, and the spherical end head is limited in the strip-shaped groove and respectively abuts against two ends of the rock column test piece.
2. The rock column alkali activity test device according to claim 1, wherein: the micrometer is a digital display micrometer.
3. The rock column alkali activity test device according to claim 1, wherein: the end of the measuring arm of the micrometer is a spherical part with the diameter of 10 mm.
4. The rock column alkali activity test device according to claim 1, wherein: the clamp is located at the center of the base plate to clamp the middle area of the rock column test piece.
5. The rock column alkali activity test device according to claim 1, wherein: the inner side surface of the strip-shaped groove is a semi-cylindrical surface.
6. The rock column alkali activity test device according to claim 5, wherein: the depth of the strip-shaped groove is 5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321490209.1U CN220305303U (en) | 2023-06-13 | 2023-06-13 | Rock column method alkali activity testing arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321490209.1U CN220305303U (en) | 2023-06-13 | 2023-06-13 | Rock column method alkali activity testing arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220305303U true CN220305303U (en) | 2024-01-05 |
Family
ID=89375514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321490209.1U Active CN220305303U (en) | 2023-06-13 | 2023-06-13 | Rock column method alkali activity testing arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220305303U (en) |
-
2023
- 2023-06-13 CN CN202321490209.1U patent/CN220305303U/en active Active
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