CN209911091U - A mould for preparing quick corrosion test piece of concrete reinforcement - Google Patents
A mould for preparing quick corrosion test piece of concrete reinforcement Download PDFInfo
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- CN209911091U CN209911091U CN201920723557.6U CN201920723557U CN209911091U CN 209911091 U CN209911091 U CN 209911091U CN 201920723557 U CN201920723557 U CN 201920723557U CN 209911091 U CN209911091 U CN 209911091U
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Abstract
The utility model discloses a mould for preparing quick corrosion test piece of concrete reinforcement, it includes: a mold frame for molding concrete by casting; a pair of reinforcing steel bar positioning flat plates for fixing reinforcing steel bars; a pair of plate supporting members for supporting the reinforcing bar positioning plate; the steel bar positioning flat plate mould is characterized in that a first pouring cavity is formed in the mould frame, a pair of steel bar positioning flat plates are arranged in the first pouring cavity to form a second pouring cavity, a pair of flat plate supporting pieces are arranged in the first pouring cavity to respectively support the pair of steel bar positioning flat plates, and steel bar positioning holes are formed in opposite surfaces of the pair of steel bar positioning flat plates. The utility model discloses an above-mentioned subassembly and combination make the utility model provides a mould has that the equipment is dismantled conveniently, the reinforcing bar is fixed reliable, the test piece shaping is reasonable and a great deal of advantage such as repeatedly usable.
Description
Technical Field
The utility model relates to a concrete durability test technical field, in particular to a mould for preparing quick corrosion test piece of concrete reinforcing bar.
Background
Reinforced concrete is one of the most widely used materials in modern building materials, and the large-scale application of reinforced concrete realizes the rapid development of various traffic facilities and infrastructure. However, although reinforced concrete can meet the requirements of various structures in terms of strength, the service life of the reinforced concrete in various fields is greatly limited due to the durability problem. In particular, for a reinforced concrete structure which is in a corrosive environment for a long time, the corrosion of the steel bars becomes a main cause which seriously affects the durability of the structure. After the steel bars in the concrete are corroded, the bearing capacity of the reinforced concrete structure is reduced, and serious economic loss and safety accidents are caused.
Therefore, before the reinforced concrete is used in a corrosive environment, the reinforced concrete must be studied in the relevant corrosive environment to ensure that the design and use requirements are met. Although various relevant molds exist at present, the thickness of a steel bar protective layer of a test piece prepared by the molds is too small, or the steel bar cannot be fixed at a position required by an experiment and is completely wrapped, and the size of the prepared test piece is too large, so that a dry-wet cycle corrosion test is difficult to realize; meanwhile, although a similar mold diagram is provided in the existing specifications, the mold is designed as a disposable mold, and has a defect in recycling. And there are deficiencies in convenience and reliability of assembly and disassembly, and reinforcement fixation.
Thus, the prior art has yet to be improved and enhanced.
SUMMERY OF THE UTILITY MODEL
In view of the foregoing prior art's weak point, the utility model aims to provide a mould for preparing quick corrosion test piece of concrete steel bar, it has the advantage that assembly and disassembly is convenient, the reinforcing bar is fixed reliable, the test piece shaping is reasonable and repeatedly usable.
In order to achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides a mould for preparing quick corrosion test piece of concrete reinforcement, include:
a mold frame for molding concrete by casting;
a pair of reinforcing steel bar positioning flat plates for fixing reinforcing steel bars;
a pair of plate supporting members for supporting the reinforcing bar positioning plate;
the steel bar positioning flat plate mould is characterized in that a first pouring cavity is formed in the mould frame, a pair of steel bar positioning flat plates are arranged in the first pouring cavity to form a second pouring cavity, a pair of flat plate supporting pieces are arranged in the first pouring cavity to respectively support the pair of steel bar positioning flat plates, and steel bar positioning holes are formed in opposite surfaces of the pair of steel bar positioning flat plates.
The mold for preparing the test piece for the rapid corrosion test of the concrete reinforcing steel bar comprises a bottom template, a pair of wide side templates and a pair of long side templates, wherein the pair of wide side templates are fixed on two wide side edges of the bottom template respectively, the pair of long side templates are fixed on two long side edges of the bottom template respectively, and a first pouring cavity is formed among the bottom template, the pair of wide side templates and the pair of long side templates.
In the die for preparing the test piece for the rapid corrosion test of the concrete reinforcing steel bar, two wide side edges of the bottom template are fixedly connected with a pair of wide side templates through a pair of fixing bolts respectively, and two long side edges of the bottom template are fixedly connected with a pair of long side templates through a pair of fixing bolts respectively.
In the mould for preparing the test piece for the rapid corrosion test of the concrete reinforcing steel bar, two ends of each long side template are fixedly connected with a pair of wide side templates through two pairs of fixing bolts respectively.
The mould for preparing the test piece for the rapid corrosion test of the concrete reinforcing steel bar is characterized in that a pair of positioning grooves respectively used for positioning a pair of reinforcing steel bar positioning flat plates are arranged on the long side template.
The die for preparing the test piece for the rapid corrosion test of the concrete reinforcing steel bars is characterized in that a pair of positioning grooves respectively used for positioning a pair of reinforcing steel bar positioning flat plates are arranged on the bottom template.
In the mould for preparing the test piece for the rapid corrosion test of the concrete reinforcing steel bar, the depth of the reinforcing steel bar positioning hole is 1 mm.
The mould for preparing the test piece for the rapid corrosion test of the concrete reinforcing steel bar is characterized in that the mould frame is a steel mould frame.
The mould for preparing the test piece for the rapid corrosion test of the concrete reinforcing steel bar is characterized in that the flat plate support piece is a wooden flat plate support piece.
The mould for preparing the test piece for the rapid corrosion test of the concrete reinforcing steel bar is characterized in that a lifting handle is arranged on the flat plate supporting piece.
Compared with the prior art, the utility model provides a pair of a mould for preparing quick corrosion test piece of concrete reinforcement, it includes: a mold frame for molding concrete by casting; a pair of reinforcing steel bar positioning flat plates for fixing reinforcing steel bars; a pair of plate supporting members for supporting the reinforcing bar positioning plate; the steel bar positioning flat plate mould is characterized in that a first pouring cavity is formed in the mould frame, a pair of steel bar positioning flat plates are arranged in the first pouring cavity to form a second pouring cavity, a pair of flat plate supporting pieces are arranged in the first pouring cavity to respectively support the pair of steel bar positioning flat plates, and steel bar positioning holes are formed in opposite surfaces of the pair of steel bar positioning flat plates. The utility model discloses an above-mentioned subassembly and combination make the utility model provides a mould has that the equipment is dismantled conveniently, the reinforcing bar is fixed reliable, the test piece shaping is reasonable and a great deal of advantage such as repeatedly usable.
Drawings
FIG. 1 is the utility model provides a pair of a structural schematic for preparing the preferred embodiment of the quick corrosion test piece of concrete reinforcement.
Fig. 2 is the utility model provides a pair of an explosion schematic diagram for preparing the preferred embodiment of concrete reinforcement rapid corrosion test piece.
Fig. 3 is the utility model provides a pair of a bottom view for preparing the preferred embodiment of concrete reinforcement rapid corrosion test piece.
Fig. 4 is a side view of the preferred embodiment for preparing the test piece for the rapid corrosion test of the concrete reinforcing steel bar.
In the figure, 10, the mould frame; 11. a bottom template; 12. a broad-side template; 13. a long side template; 20. a steel bar positioning flat plate; 21. positioning holes for reinforcing steel bars; 30. a plate support; 31. a handle; 40. a first casting cavity; 50. a second casting cavity; 60. reinforcing steel bars; 70. and (5) fixing the bolt.
Detailed Description
The utility model provides a mould for preparing quick corrosion test piece of concrete reinforcement, it has the advantage that assembly and disassembly is convenient, the reinforcing bar is fixed reliable, the test piece shaping is reasonable and repeatedly usable. In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the following description of the present invention will refer to the accompanying drawings and illustrate embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Referring to fig. 1 and fig. 2, a schematic structural diagram and an explosion diagram of a preferred embodiment of a mold for preparing a test piece for a rapid corrosion test of a concrete reinforcement according to the present invention are respectively shown, and it can be seen that the mold includes:
a mold frame 10 for casting concrete;
a pair of reinforcing bar positioning plates 20 for fixing the reinforcing bars 60;
a pair of plate supporters 30 for supporting the reinforcing bar positioning plate 20.
The mold frame 10 is internally provided with a first pouring cavity 40, the pair of steel bar positioning flat plates 20 are arranged in the first pouring cavity 40 and form a second pouring cavity 50, the pair of flat plate supporting members 30 are arranged in the first pouring cavity 40 and respectively support the pair of steel bar positioning flat plates 20, the opposite surfaces of the pair of steel bar positioning flat plates 20 are respectively provided with a steel bar positioning hole 21, and the steel bar positioning hole 21 is positioned in the center of the steel bar positioning flat plate 20.
When a test piece for a rapid corrosion test of a concrete reinforcement is prepared, a second pouring cavity 50 is poured firstly, so that the reinforcement 60 in the second pouring cavity 50 is wrapped by concrete; and then removing the steel bar positioning flat plate 20 and the flat plate supporting piece 30, and further pouring the rest two end parts of the first pouring cavity 40, so that the two ends of the steel bars 60 are continuously wrapped by the concrete, and finally forming a concrete steel bar test piece for a rapid corrosion test.
In a specific embodiment, the mold frame 10 includes a bottom mold plate 11, a pair of wide side mold plates 12 and a pair of long side mold plates 13, the pair of wide side mold plates 12 are respectively fixed on two wide sides of the bottom mold plate 11, the pair of long side mold plates 13 are respectively fixed on two long sides of the bottom mold plate 11, and a first casting cavity 40 is formed among the bottom mold plate 11, the pair of wide side mold plates 12 and the pair of long side mold plates 13.
The mold frame 10 can be quickly assembled and disassembled by the cooperation of the bottom mold plate 11, the pair of wide side mold plates 12, and the pair of long side mold plates 13. The size of the test piece required in this embodiment is 100 × 100 × 200 (in this embodiment, the size unit is millimeter mm), the reinforcing steel bar 60 needs to be fixed in the middle of the test piece when the test piece is prepared, two ends of the reinforcing steel bar 60 cannot be exposed, and the wrapping thickness of the concrete needs to be greater than or equal to 50 mm.
Therefore, in the present embodiment, the corresponding wide-side template 12 is set to have a size of 100 × 100 × 6, the long-side template 13 is set to have a size of 100 × 212 × 6, and the bottom template 11 is set to have a size of 112 × 212 × 6; meanwhile, the size of the steel bar positioning flat plate 20 is set to 100 × 100 × 6, the diameter of the steel bar positioning hole 21 is selected to be 7mm, and in order that the steel bar 60 is not easily driven in the process of removing the steel bar positioning flat plate 20, the depth of the steel bar positioning hole 21 is selected to be 1 mm.
In a more specific embodiment, referring to fig. 3 and 4, two wide sides of the bottom form 11 are fixedly connected to a pair of wide side forms 12 through a pair of fixing bolts 70, and two long sides of the bottom form 11 are fixedly connected to a pair of long side forms 13 through a pair of fixing bolts 70. In addition, referring to fig. 4, two ends of each long side formwork 13 are fixedly connected to a pair of wide side formworks 12 through two pairs of fixing bolts 70, respectively. The fixing bolt 70 may be specifically selected as an inner hexagon bolt, and of course, other kinds of bolts may be selected.
By providing 4 pairs of fixing bolts 70 on the bottom form 11 and 2 pairs of fixing bolts 70 on each of the long side forms 13, it is possible to provide a reliable restraining force to the mold frame 10, preventing mold burst and slurry leakage when pouring and vibrating concrete. Meanwhile, when the mold is disassembled, the test piece can be smoothly demoulded only by disassembling the fixing bolts 70 on the two adjacent side molds and tapping the rest of the mold plates, so that the two processes of assembling, disassembling and pouring the mold are more convenient.
In addition, in order to make the strength of the mold meet the requirement and make the mold have higher reusability, the mold frame 10 and the steel bar positioning plate 20 are made of metal, and especially made of steel.
For the plate support 30, the dimensions are selected to be 90 × 80 × 43, and it can be made of a square block of wood, making it somewhat flexible. Because two steel bar positioning plates 20 are easy to tip over to the two ends of the mould when vibrating, the plate supporting member 30 can provide a support for preventing the plates from shifting and tipping over, and the steel bars 60 are in the position required by the experiment when the concrete is poured and vibrated. And for the convenience of putting the plate support 30 into or taking it out of the mold frame 10, the plate support 30 is further provided with a handle 31.
Preferably, in order to make the second casting cavity 50 formed by the pair of steel bar positioning plates 20 located in the middle of the first casting cavity 40, the distance between the two ends of the steel bar 60 and the side surface of the mold is ensured to be more than 50 mm. A pair of positioning grooves (also can be positioning lines or other positioning marks, not shown in the figure) for positioning a pair of steel bar positioning flat plates 20 can be arranged on both the long side formwork 13 and the bottom formwork 11, and the positioning is realized by placing the steel bar positioning flat plates 20 in the positioning grooves. Of course, in actual operation, the testing personnel can also position according to experience or measuring mode, and the utility model discloses do not limit to this.
In the embodiment, through the matching of the above components, a small concrete reinforcement dry-wet cycle rapid corrosion test specimen with the size of 100 × 100 × 200 can be prepared, and the advantages of the mold are as follows:
(1) in the aspect of manufacturing the mould, the five side templates are fixed by 8 groups of fixing bolts 70, so that enough constraint force can be provided, and mould explosion and slurry leakage during pouring and vibrating are prevented;
(2) in the aspect of steel bar positioning, the two steel bar positioning flat plates 20 realize the positioning and fixing of the steel bars 60 positioned in the middle of the test piece through the steel bar positioning holes 21, and simultaneously provide the support of the steel bar positioning flat plates 20 through the flat plate support parts; when the middle section of the vibration is poured, the reinforcing steel bar 60 can be prevented from shifting and leaking slurry, and when the concrete at the remaining two ends of the first pouring cavity 40 is poured, the fixing part can be conveniently and reliably detached without influencing the relative displacement between the reinforcing steel bar 60 and the concrete;
(3) in the aspect of test piece removal, when the test piece reaches the age, the two adjacent side modules are removed, and the test piece in the die can be smoothly demoulded by tapping;
(4) the test piece manufactured by the die meets the requirements of the concrete reinforcement rapid corrosion test.
The utility model provides a mould is more convenient and reliable in the aspect of assembly and disassembly, fixed reinforcing bar, test piece shaping for other moulds, and the repeatability of mould is also higher simultaneously. Therefore, the utility model provides a mould is under the simulation sea water/fresh water environment, and the quick corrosion test of concrete reinforcement provides the new installation of the small-size test piece of preparation.
And, for better understanding the utility model discloses, please combine fig. 1-4, the utility model provides a concrete operation steps of a mould for preparing quick corrosion test piece of concrete reinforcement is as follows:
(1) assembling the mold frame 10: and each side die and the bottom die are fixed on the bottom die through 4 groups of inner hexagon bolts respectively, and then each side die is fixed in pairs through the other 4 groups of inner hexagon bolts, so that the reliable constraint force is improved, and the slurry leakage or die explosion is prevented when concrete pouring is vibrated.
(2) Inserting the two reinforcing steel bar 60 fixing flat plates into the die frame 10, and clamping the reinforcing steel bars 60 into the reinforcing steel bar positioning holes 21 in the middle of the two reinforcing steel bar fixing flat plates 20; the two slab supporting members 30 are inserted into spaces at both ends of the first casting cavity 40 to support the two reinforcing steel bar fixing slabs 20, thereby preventing the reinforcing steel bars 60 from deviating from the fixing positions during casting and vibrating and preventing the reinforcing steel bar fixing slabs 20 from tipping over to both sides; before pouring the middle section, the positions of the two fixed steel bar flat plates 20 are adjusted, so that the distance from the two ends of the steel bar 60 to the side face of the mould is 50 mm.
(3) Pouring the middle section of the test piece with concrete (namely pouring the concrete into the second pouring cavity 50) in two layers, then placing the test piece on a vibrating table for vibrating for 10-20s, and placing the mould for about 15 minutes until the concrete begins to harden (before initial setting).
(4) Slightly lifting the supporting parts at the two sides, then overturning the fixed flat plates at the two sides towards the two ends of the mould, and slightly taking out the fixed flat plates to ensure that the reinforcing steel bars 60 are not driven when the flat plates are taken out; filling the cement mortar with a rich proportion into the left two-end spaces of the first pouring cavity for multiple times by using a file, pouring while inserting and tamping without broken edges, and tightly wrapping the two ends of the reinforcing steel bar 60; and finally, lifting the two ends respectively by hands, vibrating lightly for compacting, and trowelling by a flat shovel.
(5) In order to ensure the integrity of the test piece during the form removal, the form removal is started after two days of maintenance; when the mold is disassembled, the two adjacent side molds of the mold frame 10 are firstly disassembled, and the other two side molds and the bottom mold are tapped by a hammer, so that the test piece can be smoothly demolded, and the complete edges and corners of the test piece are ensured.
(6) And finally, applying the obtained test piece to a rapid corrosion test of the concrete reinforcing steel bar.
To sum up, the utility model provides a mould for preparing concrete reinforcement rapid corrosion test piece, it includes: a mold frame for molding concrete by casting; a pair of reinforcing steel bar positioning flat plates for fixing reinforcing steel bars; a pair of plate supporting members for supporting the reinforcing bar positioning plate; the steel bar positioning flat plate mould is characterized in that a first pouring cavity is formed in the mould frame, a pair of steel bar positioning flat plates are arranged in the first pouring cavity to form a second pouring cavity, a pair of flat plate supporting pieces are arranged in the first pouring cavity to respectively support the pair of steel bar positioning flat plates, and steel bar positioning holes are formed in opposite surfaces of the pair of steel bar positioning flat plates. The utility model discloses an above-mentioned subassembly and combination make the utility model provides a mould has that the equipment is dismantled conveniently, the reinforcing bar is fixed reliable, the test piece shaping is reasonable and a great deal of advantage such as repeatedly usable.
It should be understood that equivalent alterations and modifications can be made by those skilled in the art according to the technical solution of the present invention and the inventive concept thereof, and all such alterations and modifications should fall within the scope of the appended claims.
Claims (10)
1. The utility model provides a mould for preparing quick corrosion test piece of concrete reinforcement which characterized in that includes:
a mold frame for molding concrete by casting;
a pair of reinforcing steel bar positioning flat plates for fixing reinforcing steel bars;
a pair of plate supporting members for supporting the reinforcing bar positioning plate;
the steel bar positioning flat plate mould is characterized in that a first pouring cavity is formed in the mould frame, a pair of steel bar positioning flat plates are arranged in the first pouring cavity to form a second pouring cavity, a pair of flat plate supporting pieces are arranged in the first pouring cavity to respectively support the pair of steel bar positioning flat plates, and steel bar positioning holes are formed in opposite surfaces of the pair of steel bar positioning flat plates.
2. The mold for preparing a test piece for a rapid corrosion test of a concrete reinforcing bar according to claim 1, wherein the mold frame comprises a bottom mold plate, a pair of wide side mold plates and a pair of long side mold plates, the pair of wide side mold plates are respectively fixed on two wide side edges of the bottom mold plate, the pair of long side mold plates are respectively fixed on two long side edges of the bottom mold plate, and a first pouring cavity is formed among the bottom mold plate, the pair of wide side mold plates and the pair of long side mold plates.
3. The mold for preparing a test piece for a rapid corrosion test of a concrete reinforcing steel bar according to claim 2, wherein two wide sides of the bottom mold plate are fixedly connected with a pair of wide side mold plates through a pair of fixing bolts respectively, and two long sides of the bottom mold plate are fixedly connected with a pair of long side mold plates through a pair of fixing bolts respectively.
4. The mold for preparing a test piece for a rapid corrosion test of a concrete reinforcing bar according to claim 2, wherein both ends of each long side template are fixedly connected with a pair of wide side templates respectively through two pairs of fixing bolts.
5. The mold for preparing a concrete reinforcing steel rapid corrosion test specimen according to claim 2, wherein the long side mold plate is provided with a pair of positioning grooves for positioning a pair of reinforcing steel positioning flat plates, respectively.
6. The mold for preparing a test piece for the rapid corrosion test of the concrete steel bar according to claim 2, wherein a pair of positioning grooves for positioning a pair of steel bar positioning flat plates respectively is arranged on the bottom template.
7. The mold for preparing a test piece for a rapid corrosion test of a concrete reinforcing steel bar according to claim 1, wherein the depth of the reinforcing steel bar positioning hole is 1 mm.
8. The mold for preparing a test piece for a rapid corrosion test of a concrete reinforcing bar according to claim 1, wherein the mold frame is a steel mold frame.
9. The mold for preparing a test piece for a rapid corrosion test of a concrete reinforcing bar according to claim 1, wherein the plate supporting member is a wooden plate supporting member.
10. The mold for preparing a test piece for a rapid corrosion test of a concrete reinforcing bar according to claim 1, wherein a handle is provided on the flat plate support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920723557.6U CN209911091U (en) | 2019-05-20 | 2019-05-20 | A mould for preparing quick corrosion test piece of concrete reinforcement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920723557.6U CN209911091U (en) | 2019-05-20 | 2019-05-20 | A mould for preparing quick corrosion test piece of concrete reinforcement |
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| Publication Number | Publication Date |
|---|---|
| CN209911091U true CN209911091U (en) | 2020-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920723557.6U Active CN209911091U (en) | 2019-05-20 | 2019-05-20 | A mould for preparing quick corrosion test piece of concrete reinforcement |
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|---|---|
| CN (1) | CN209911091U (en) |
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2019
- 2019-05-20 CN CN201920723557.6U patent/CN209911091U/en active Active
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