CN104568532A - Mould for preparing test piece used for concrete tensile test - Google Patents
Mould for preparing test piece used for concrete tensile test Download PDFInfo
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- CN104568532A CN104568532A CN201310496706.7A CN201310496706A CN104568532A CN 104568532 A CN104568532 A CN 104568532A CN 201310496706 A CN201310496706 A CN 201310496706A CN 104568532 A CN104568532 A CN 104568532A
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- plate
- mould
- base plate
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- baseplate
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Abstract
The invention discloses a mould for preparing a test piece used for a concrete tensile test. The mould comprises a baseplate, wherein the baseplate is a rectangular plate body; lateral plates are arranged on two sides of the baseplate; an inward depression is formed in the middle of each lateral plate; the section of the depression adopts the structure of an isosceles trapezoid without a lower bottom; an isosceles trapezoid plate is arranged at the bottom end of the depression; the shape of the isosceles trapezoid plate is matched with that of the depression; the lateral plate is fixedly connected with the isosceles trapezoid plate through a plurality of triangular plates; the lateral plate, the isosceles trapezoid plate and each triangular plate are perpendicular to one another in pairs; a winged cavity is defined by the baseplate, the lateral plates arranged on two sides of the baseplate, and baffles arranged at two ends of the baseplate, that is, the two ends of the cavity are wide, and the middle of the cavity is narrow and long. Through the adoption of the mould, the test piece is prepared. Being utilized for testing the axis tensile strength and the ultimate tensile strength of concrete, the test piece clamped by a flexible clamping device has the advantages that stress distribution is uniform during the test, and test results are accurate and reliable.
Description
Technical field
The present invention relates to concrete axial tensile strength and ultimate elongation experimental technique field, be specially a kind of mould can preparing wing termination test specimen.
Background technology
Require to carry out concrete axial tensile strength and ultimate elongation test to concrete according to industry standard DL/T5150-2001 " concrete for hydraulic structure testing regulations " 4.4, specimen holder mode conventional is at present that prism test specimen buries bar connection clamping and the termination clamping of prism test specimen etc. respectively.Adopt this several method of clamping, in test findings, the fracture of test specimen termination often occurs, this is because concrete is a kind of hard brittle material, and its stress for local is concentrated and can not as metal material, be produced larger distortion by local and reduce stress localization effects.Thus once certain some generation stress on test specimen is concentrated, concrete will be caused at this cracking destruction.And these test methods existing are not owing to considering this characteristic concrete, make concrete sample be concentrate due to stress locally and destroy, and the single tension that is only subject to of not testing requirements is destroyed, measured test result is not accurate enough.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of mould preparing Analysis of Concrete Tensile test test specimen, its wing test specimen termination of preparing is after employing flexible holding device clamps, when carrying out concrete axial tensile strength and ultimate elongation experimental test, stress distribution is even, and acquired results accurately and reliably.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of mould preparing Analysis of Concrete Tensile test test specimen, comprise base plate, described base plate is rectangle plate body, the both sides of base plate are provided with side plate, cave in the inside in the middle part of side plate, the cross section of recess is an isosceles trapezoidal structure of not going to the bottom, the recess bottom of side plate is provided with equicrural ladder plate, the shape of trapezoidal plate and the matching form at depressed side board place close, side plate is fixedly connected with by multiple set square with equicrural ladder plate, and its latus inframedium, equicrural ladder plate, set square are vertical between two; This mould surrounds wide, the middle long narrow wing cavity in two ends by the side plate of base plate, both sides and the baffle plate at two ends.
The two ends of described base plate, side plate are equipped with the draw-in groove matched with Weir Plate Thickness, and baffle plate is arranged on the two ends of base plate by draw-in groove.
Described side plate is connected to base plate by equicrural ladder plate, is bolted between equicrural ladder plate and base plate.
Adopt test specimen prepared by mould provided by the invention, coordinate Analysis of Concrete Tensile to test flexible holding device again to clamp, when the test specimen prepared this mould clamps, all flexible holding device is installed at its two ends, holding force can be made to be uniformly distributed at clamping surface, reduce the phenomenon that stress is concentrated, improve the accuracy of test.Described flexible holding device comprises retained part and coupling part, comprising for being also provided with the wedged plate of fitting with test specimen to be held in the holding tank of clamping test pieces, holding tank, being provided with cushion block between holding tank and wedged plate at described retained part; Described coupling part is connected on holding tank.Described wedged plate adopts spring steel material to make, and the effect of wedged plate is in tension test process, rely on its distortion size to reduce concrete suffered stress gradually.Described cushion block adopts polytetrafluoroethylmaterial material to make.Because teflon soft or hard degree is suitable, play elastic reaction in a device, the elastic deformation of cushion block decreases the stress of concrete sample in tension test suffered by test specimen termination and concentrates.
By the wing concrete sample that mould provided by the invention is produced, then after coordinating flexible holding device to clamp, carry out concrete tensile strength and ultimate elongation test, can ensure that the data recorded are more accurate.
Adopting test specimen prepared by the present invention, when carrying out tension test, concentrating because decrease stress, position, termination would not occur test specimen destroys, but failure position occurs in middle part, effectively can improve test efficiency, saving resource.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described:
Fig. 1 is vertical view of the present invention.
Fig. 2 is structure partial detail drawing base plate of the present invention.
Fig. 3 is structure partial view side plate of the present invention.
Fig. 4 is structure partial view baffle plate of the present invention.
Embodiment
As Figure 1-Figure 4, the present invention includes base plate 1, described base plate is rectangle plate body, the both sides of base plate 1 are provided with side plate 2, cave in the inside in the middle part of side plate 2, and the cross section of recess is an isosceles trapezoidal structure of not going to the bottom, the recess bottom of side plate is provided with equicrural ladder plate 4, the shape of trapezoidal plate 4 and the matching form at depressed side board place close, and side plate 2 is fixedly connected with by multiple set square 5 with equicrural ladder plate 4, and its latus inframedium 2, equicrural ladder plate 4, set square 5 are vertical between two; This mould surrounds wide, the middle long narrow wing cavity in two ends by the side plate 2 of base plate 1, both sides and the baffle plate 3 at two ends.
The two ends of described base plate 1, side plate 2 are equipped with the draw-in groove matched with baffle plate 3 thickness, and baffle plate 3 is arranged on the two ends of base plate by draw-in groove.
Described side plate is connected to base plate 1 by equicrural ladder plate 4, is bolted between equicrural ladder plate 4 and base plate 1.
Before carrying out tension test, be applicable to the wing test specimen of flexible holding device by device preparation provided by the invention, first side plate 2 and baffle plate 3 will be arranged on base plate 1 successively, and with bolt, trapezoidal plate 4 and base plate 1 be fixed.The thin oil of one deck is smeared in two short wide, the middle long narrow wing cavity inner walls surrounded this device with machine oil and bottom.Wing cavity inner engine oil is smeared evenly closely knit with the Concrete Filled prepared, its concrete setting maintenance is made under being put into suitable environmental baseline, when concrete final set, the side plate of this device and the bolt of base plate is taken off with spanner, take side plate and baffle plate successively apart, take out shaping wing concrete sample, when wing concrete sample maintenance is to after date, with flexible holding device, ultimate elongation test is carried out to concrete sample.Thus detect the concrete test findings of this preparation.
Claims (3)
1. prepare the mould of Analysis of Concrete Tensile test test specimen for one kind, it is characterized in that: comprise base plate (1), described base plate is rectangle plate body, the both sides of base plate (1) are provided with side plate (2), cave in the inside in the middle part of side plate (2), the cross section of recess is an isosceles trapezoidal structure of not going to the bottom, the recess bottom of side plate is provided with equicrural ladder plate (4), the shape of trapezoidal plate (4) and the matching form at depressed side board place close, side plate (2) is fixedly connected with by multiple set square (5) with equicrural ladder plate (4), its latus inframedium (2), equicrural ladder plate (4), set square (5) is vertical between two, this mould surrounds wide, the middle long narrow aerofoil profile cavity in two ends by base plate (1), the side plate (2) of both sides and the baffle plate (3) at two ends.
2. the mould preparing Analysis of Concrete Tensile test test specimen according to claim 1, it is characterized in that: the two ends of described base plate (1), side plate (2) are equipped with the draw-in groove matched with baffle plate (3) thickness, and baffle plate (3) is arranged on the two ends of base plate by draw-in groove.
3. the mould preparing Analysis of Concrete Tensile test test specimen according to claim 1, is characterized in that: described side plate is connected to base plate (1) by equicrural ladder plate (4), is bolted between equicrural ladder plate (4) and base plate (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310496706.7A CN104568532A (en) | 2013-10-22 | 2013-10-22 | Mould for preparing test piece used for concrete tensile test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310496706.7A CN104568532A (en) | 2013-10-22 | 2013-10-22 | Mould for preparing test piece used for concrete tensile test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104568532A true CN104568532A (en) | 2015-04-29 |
Family
ID=53085112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310496706.7A Pending CN104568532A (en) | 2013-10-22 | 2013-10-22 | Mould for preparing test piece used for concrete tensile test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104568532A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105466745A (en) * | 2016-01-13 | 2016-04-06 | 天津大学 | Cement-based material I-type test piece restraining shrinkage test mold and method |
| CN112356242A (en) * | 2020-11-03 | 2021-02-12 | 温州融宸科技有限公司 | Detachable assembly type building mold and using method |
-
2013
- 2013-10-22 CN CN201310496706.7A patent/CN104568532A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105466745A (en) * | 2016-01-13 | 2016-04-06 | 天津大学 | Cement-based material I-type test piece restraining shrinkage test mold and method |
| CN112356242A (en) * | 2020-11-03 | 2021-02-12 | 温州融宸科技有限公司 | Detachable assembly type building mold and using method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150429 |
|
| WD01 | Invention patent application deemed withdrawn after publication |