CN217505866U - Steady layer of water dry shrinkage experiment measuring device of mainly used building site laboratory - Google Patents
Steady layer of water dry shrinkage experiment measuring device of mainly used building site laboratory Download PDFInfo
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- CN217505866U CN217505866U CN202123228025.1U CN202123228025U CN217505866U CN 217505866 U CN217505866 U CN 217505866U CN 202123228025 U CN202123228025 U CN 202123228025U CN 217505866 U CN217505866 U CN 217505866U
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Abstract
The utility model discloses a steady layer of water dry shrinkage experiment measuring device of mainly used building site laboratory, including base, bracing piece and measuring end, its characterized in that: the base is a thin plate, the edge of the base is fixedly connected with a supporting rod, and a measuring end is movably arranged on the supporting rod; the cantilever right-hand member detachable of measuring terminal installs on the bracing piece, left end detachable mounting amesdial, cantilever middle section upper surface mount spirit level. The bottom of the utility model is used for placing the sample to be measured and installing the supporting rod, the movable installing and measuring end on the supporting rod can be adjusted in height and locked by the teeth, thereby avoiding the displacement error or error; a level meter is installed, so that the experimental environment level is ensured, and errors are reduced; the measurement is carried out through a dial indicator, so that the measurement precision is ensured; this project organization is reasonable, small in size conveniently carries, easy dismounting, and the cost of manufacture is low, and the error is less, can satisfy the measurement requirement of building site laboratory water steady layer dry shrinkage experiment.
Description
Technical Field
The utility model belongs to steady layer of water dry shrinkage experiment measuring instrument field, concretely relates to steady layer of water dry shrinkage experiment measuring device of mainly used building site laboratory.
Background
The cement stabilized macadam foundation is short for cement stabilized macadam foundation, namely cement is adopted to solidify graded macadam, and the cement stabilized macadam is completed through compaction and maintenance. The water-stable mixing proportion is preliminarily prepared in a laboratory to determine the cement mixing amount and the coarse-fine aggregate proportion and also determine the maximum dry density. The water-stable stirring station can be adopted for mixing when the amount is large.
The cement stabilized macadam takes graded macadam as aggregate, adopts a certain amount of cementing materials and enough mortar volume to fill the gap of the aggregate, and is paved and compacted according to the embedding and extruding principle. The compactness of the mortar is close to the compactness, the strength mainly depends on the embedding, extruding and locking principles among the gravels, and simultaneously, the mortar has enough volume to fill the gaps of the aggregate. Its initial strength is high, and its strength can be quickly increased with age, and can be quickly formed into plate body, so that it has high strength, and good impermeability and frost resistance. The dosage of the water-stable cement is generally 3% -6% of the mixture, the unconfined compressive strength of 7 days can reach 1.5-4.0 mpa, and the cement is higher than other roadbed materials. After water is stable and survived, the water is not muddy when meeting rain and has a solid surface, thus being an ideal base material for high-grade pavements.
The dry shrinkage of cement concrete is an inevitable detrimental volume change of cement concrete during use. At present, in the national standard GB/T25181-2010 premixed mortar, item 12 of a shrinkage index testing method JGJ/T70-2009 building mortar basic performance testing method, a prism with the sample size of 40mm multiplied by 160mm is placed in the centers of two end faces of a test mold, and then a specified shrinkage head is placed in a vertical mortar shrinker for testing. According to the method, the test concept that the length of the sample is short and the sample is free to shrink deviates from the actual test concept, on one hand, the sample is short and has no enough deformation, so that the result cannot be measured; on the other hand, the tested data is the shrinkage rate of the sample under free shrinkage, and in practical application, the situation that wall mortar always cracks and the like in application although the test result of the sample meets the requirement of national standard is found, so that the result data obtained by the test can not reflect the practical situation and can not be used for guiding practical application. In addition, because the device for manufacturing and measuring the water stable layer drying shrinkage test piece in the construction site laboratory at present has large volume, the test piece is difficult to form and expensive, and is not suitable for being repeatedly carried.
In order to solve the problems, the measuring device for the water stable layer drying shrinkage experiment is mainly used for a construction site laboratory.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model designs a measuring device for a water-stable layer drying shrinkage experiment, which is mainly used in a construction site laboratory, wherein the bottom of the measuring device is used for placing a sample to be measured and installing a supporting rod, the movable installing and measuring end on the supporting rod is adjustable in height and locked by teeth, thereby avoiding the generation of errors or errors caused by displacement; a level meter is installed, so that the experimental environment level is ensured, and errors are reduced; and the measurement is carried out through a dial indicator, so that the measurement precision is ensured.
In order to achieve the technical effects, the utility model discloses a realize through following technical scheme: the utility model provides a steady layer of water dry shrinkage experiment measuring device of mainly used building site laboratory, includes base, bracing piece and measuring terminal, its characterized in that: the base is a thin plate, the edge of the base is fixedly connected with a supporting rod, and a measuring end is movably arranged on the supporting rod; the cantilever right-hand member detachable of measuring terminal installs on the bracing piece, left end detachable mounting amesdial, cantilever middle section upper surface mount spirit level.
Furthermore, the base is a rectangular or round thin plate with uniform thickness, and reinforcing ribs are arranged at the joints of the base and the supporting rods.
Furthermore, three grooves are axially arranged on the surface of the middle upper section of the supporting rod, and the distance between every two adjacent grooves is 90 degrees; the bottom of the groove is provided with a plurality of teeth.
The front side, the rear side and the right side of the right end of the cantilever are movably provided with screw rods, the tail end of each screw rod is fixedly provided with a knob, and the screw rods correspond to the grooves respectively; the front end of the screw rod is hinged with a movable rod, and the movable rod is provided with teeth.
Furthermore, a knob tightening device is arranged at the left end of the cantilever.
The beneficial effects of the utility model are that:
the utility model designs a measuring device for a water stable layer drying shrinkage experiment, which is mainly used in a construction site laboratory, the bottom of the measuring device is used for placing a sample to be measured and an installation supporting rod, the movable installation measuring end on the supporting rod can be adjusted in height and locked by teeth, thereby avoiding the displacement from generating errors or errors; a level meter is installed, so that the experimental environment level is ensured, and errors are reduced; the measurement is carried out through a dial indicator, so that the measurement precision is ensured; this project organization is reasonable, small in size conveniently carries, easy dismounting, and the cost of manufacture is low, and the error is less, can satisfy the measurement requirement of building site laboratory water steady layer dry shrinkage experiment.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a front view of the present invention;
FIG. 3 is a schematic view of the structure of the measuring end of the present invention;
FIG. 4 is a schematic view of the structure inside the groove of the present invention;
in the drawings, the reference numbers indicate the following list of parts:
1. a base; 2. a support bar; 201. a groove; 3. a measuring end; 301. a cantilever; 302. a fixing device; 303. a level gauge; 304. a knob take-up device; 305. a dial indicator; 306. a screw; 307. a movable rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Example 1
Referring to fig. 1 to 4, a measuring device for a water-stable layer drying shrinkage experiment mainly used in a construction site laboratory comprises a base 2, a support rod 2 and a measuring end 3, and is characterized in that: the base 2 is a thin plate, the edge of the base is fixedly connected with a supporting rod 2, and a measuring end 3 is movably arranged on the supporting rod 2; the right end of a cantilever 301 of the measuring end 3 is detachably mounted on the supporting rod 2, the dial indicator 305 is detachably mounted at the left end, and the level gauge 303 is mounted on the upper surface of the middle section of the cantilever 301.
The base 2 is a rectangular or circular thin plate with uniform thickness, and reinforcing ribs are arranged at the joint of the base 2 and the supporting rod 2 to keep the supporting rod 2 stable.
Three grooves 201 are axially arranged on the surface of the middle upper section of the supporting rod 2, and the distance between every two adjacent grooves 201 is 90 degrees; the bottom of the groove 201 is provided with a plurality of teeth.
The front side, the rear side and the right side of the right end of the cantilever 301 are movably provided with screw rods 306, the tail ends of the screw rods 306 are fixedly provided with knobs, and the screw rods 306 correspond to the grooves 201 respectively; the front end of the screw 306 is hinged with a movable rod 307, teeth are arranged on the movable rod 307 and matched with the teeth in the groove 201, the movable rod 307 and the support rod 2 cannot generate relative displacement during locking, and errors or even errors caused by the displacement are avoided.
The left end of the cantilever 301 is provided with a knob loosening and tightening device 304 for detachably mounting a dial indicator 305.
Example 2
The utility model designs a measuring device for a water stable layer drying shrinkage experiment, which is mainly used in a construction site laboratory, the bottom of the measuring device is used for placing a sample to be measured and an installation supporting rod 2, a movable installation measuring end 3 is arranged on the supporting rod 2, the height of the measuring device can be adjusted, and the measuring device is locked by teeth, thereby avoiding the generation of errors or errors caused by displacement; a level meter 303 is arranged, so that the experimental environment level is ensured, and the error is reduced; the measurement is carried out through a dial indicator 305, and the measurement precision is ensured; this project organization is reasonable, small in size conveniently carries, easy dismounting, and the cost of manufacture is low, and the error is less, can satisfy the measurement requirement of building site laboratory water steady layer dry shrinkage experiment.
Example 3
The using method comprises the following steps: when in use, the device is placed on a horizontal plane and leveled through the level meter 303; placing the collected sample in the center of the base 2; placing a plate above the sample due to the unevenness of the surface of the sample; adjusting the height of the measuring end 3 to a proper position and locking the position; the dial gauge 305 data is observed periodically and recorded.
In the description of the present specification, reference to the description of "one embodiment," "an example," "a specific example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.
Claims (5)
1. The utility model provides a steady layer of water dry shrinkage experiment measuring device of mainly used building site laboratory, includes base, bracing piece and measuring end, its characterized in that: the base is a thin plate, the edge of the base is fixedly connected with a supporting rod, and a measuring end is movably arranged on the supporting rod; the cantilever right-hand member detachable of measuring terminal installs on the bracing piece, left end detachable mounting amesdial, cantilever middle section upper surface mount spirit level.
2. The device for measuring the water stability layer drying shrinkage experiment mainly used in a construction site laboratory according to claim 1, wherein the base is a rectangular or circular thin plate with uniform thickness, and reinforcing ribs are arranged at the joints of the base and the supporting rods.
3. The measurement device for the water stable layer drying shrinkage experiment mainly used in a construction site laboratory according to claim 1, wherein three grooves are axially formed on the surface of the middle upper section of the support rod, and the distance between every two adjacent grooves is 90 degrees; the bottom of the groove is provided with a plurality of teeth.
4. The measurement device for the water stability layer drying shrinkage experiment mainly used in the construction site laboratory according to claim 1, wherein the right end of the cantilever is provided with a fixing device, the front side, the rear side and the right side of the fixing device are respectively provided with a movable mounting screw rod, the tail end of the screw rod is fixedly provided with a knob, and the screw rods respectively correspond to the grooves; the front end of the screw rod is hinged with a movable rod, and the movable rod is provided with teeth.
5. The device for measuring the water-stable layer drying shrinkage experiment mainly used in a construction site laboratory according to claim 4, wherein a knob tensioner is arranged at the left end of the cantilever.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123228025.1U CN217505866U (en) | 2021-12-21 | 2021-12-21 | Steady layer of water dry shrinkage experiment measuring device of mainly used building site laboratory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123228025.1U CN217505866U (en) | 2021-12-21 | 2021-12-21 | Steady layer of water dry shrinkage experiment measuring device of mainly used building site laboratory |
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| CN217505866U true CN217505866U (en) | 2022-09-27 |
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| CN202123228025.1U Active CN217505866U (en) | 2021-12-21 | 2021-12-21 | Steady layer of water dry shrinkage experiment measuring device of mainly used building site laboratory |
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| CN (1) | CN217505866U (en) |
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2021
- 2021-12-21 CN CN202123228025.1U patent/CN217505866U/en active Active
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