CN203595645U - Testing device for evaluating evaporation rate and plastic cracking of concrete surface - Google Patents
Testing device for evaluating evaporation rate and plastic cracking of concrete surface Download PDFInfo
- Publication number
- CN203595645U CN203595645U CN201320797540.8U CN201320797540U CN203595645U CN 203595645 U CN203595645 U CN 203595645U CN 201320797540 U CN201320797540 U CN 201320797540U CN 203595645 U CN203595645 U CN 203595645U
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- concrete surface
- evaporation rate
- crack
- base plate
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- 238000005336 cracking Methods 0.000 title claims abstract description 22
- 238000012360 testing method Methods 0.000 title claims abstract description 20
- 238000001704 evaporation Methods 0.000 title claims abstract description 17
- 230000008020 evaporation Effects 0.000 title claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 5
- 239000010959 steel Substances 0.000 claims abstract description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 230000006698 induction Effects 0.000 abstract 3
- 230000008602 contraction Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005549 size reduction Methods 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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Abstract
The utility model discloses a testing device for evaluating evaporation rate and plastic cracking of a concrete surface. The testing device comprises a baseplate, side templates and crack induction units, wherein the side templates are arranged on the baseplate, and form a die chamber together with the baseplate; the crack induction units are arranged in the die chamber; according to the utility model, the side templates of the die adopt four mutually independent steel templates; every two adjacent templates are connected through a hexagon socket screw; each side template is fixed with a floor through a cross-shaped bolt, so that the stiffness and leakproofness of the die can be ensured, and the die can be conveniently disassembled; the crack induction units adopt triangular devices and are moderately sealed. The testing device has the advantages that the size is small, cracks are easily generated, and the higher practical value is achieved.
Description
Technical field
The utility model belongs to concrete plastic cracking experimental technique field, particularly a kind of for evaluating the test unit of concrete surface evaporation rate and plastic cracking.
Background technology
Under high temperature drying and strong wind atmosphere, the structural concrete surface water evaporation of newly building is very fast, cause concrete surface to shrink larger, be subject to producing differential contraction stress under inner concrete restraint condition, in first few after building hour, the very low even not yet development of concrete tensile strength, very easily produces crack, and Here it is " plastic shrinkage cracking ".
Concrete plastic cracking is the important component part of the early stage cracking risk of evaluation structure thing concrete, and its achievement in research is significant to design of material and the construction and maintenance etc. of structural concrete.Therefore, need design to carry out effective evaluation and die device simple, that easily go to concrete plastic cracking.Though there is at present such device both at home and abroad, but in concrete test operation, because causing concrete surface plastic cracking, all restrictions of mould are difficult to form, and device volume is larger, operate very difficult, be difficult to the concrete material under different proportionings and curing condition to carry out the contrast test of system.Therefore be badly in need of developing effective, simple die device.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, it is a kind of for evaluating the test unit of concrete surface evaporation rate and plastic cracking that the purpose of this utility model is to provide, can concrete surface evaporation rate be tested, be made concrete easily produce plastic cracking, and simple to operate, conveniently carry out comparative study test.
To achieve these goals, the technical solution adopted in the utility model is:
For evaluating a test unit for concrete surface evaporation rate and plastic cracking, comprise base plate 2, be arranged on base plate 2 and form the side template 1 of mold and be arranged on the crack-induced device 5 in mold with base plate 2.
Described base plate 2 is square, and four side templates 1 are arranged at respectively on four limits of base plate 2, between side template 1 and base plate 2, are connected with cruciform bolt 3, between adjacent side template 1, connect with hexagon socket head cap screw 4.
Described side template 1 is outside equipped with handle.
Described crack-induced device 5 is closed hollow triangular prism structure, and bottom welding is on base plate 2.
Described base plate 2 is square, length of side 300mm, and thickness is 5mm; The height of side template 1 is 100mm, and thickness is 10mm; Crack-induced device 5 bottom length of side 300mm, its lap is welded by stainless steel steel disc, thickness 1.5mm, crack-induced device 5 xsect bottom side lengths are 50mm, height is 63.5mm.
Described crack-induced device 5 has three, equidistantly be arranged in parallel.
Between described crack-induced device 5, spacing is 50mm, and crack-induced device 5 is 25mm with side template 1 spacing.
Compared with prior art, the beneficial effects of the utility model are:
1) the more existing test mould size reduction of the utility model die size approximately 5 times, crack-induced device adopts triangle and suitably encrypts, measure thereby reach evaporation rate the object that operation is light, concrete surface easily produces plastic cracking, there is important practical value.
2) side template of mould adopts four separate steel forms, adopts hexagon socket head cap screw to connect between adjacent forms, and this device can guarantee rigidity and the leakproofness of mould, facilitates again form removal.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Fig. 2 be in Fig. 1 A-A to view.
Fig. 3 is the utility model crack-induced device structural representation.
Embodiment
Describe embodiment of the present utility model in detail below in conjunction with drawings and Examples.
As depicted in figs. 1 and 2, as shown in Figure 1, a kind of for evaluating the die device of concrete surface evaporation rate and plastic cracking risk.Mould is of a size of 300mm × 300mm × 100mm, mainly comprises side template 1, base plate 2 and crack-induced device 5.The thickness of side template 1 is 10mm, and the thickness of base plate 2 is 5mm.Side template 1 adopts four cruciform bolts 3 to be connected with base plate 2, to improve the rigidity of mould.Between side template 1, adopt four hexagon socket head cap screws 4 to connect, this is provided with three effects: the rigidity that 1) guarantees mould; 2) leakproofness of enhancing mould; 3) be convenient to form removal.Three crack-induced devices 5 are installed in mould.Crack-induced device 5 is closed hollow triangular prism, as shown in Figure 3.Its bottom is directly welded on die bottom plate 2, and the bottom length of side is 300mm, and its lap is welded by stainless steel steel disc, and its thickness is 1.5mm; Persuader xsect bottom side length is 50mm, and height is 63.5mm.Distance between crack-induced device 5 is 50mm, and crack-induced device 5 is 25mm with the spacing of side template 1.When test, directly pack concrete into die for molding, under certain temperature and wind speed environment, concrete is subject to the effect of contraction of mould internal fissure persuader 5 to produce crack; At interval of certain hour, mould is placed and on weighing balance, weighed concrete quality and change.
Claims (7)
1. one kind for evaluating the test unit of concrete surface evaporation rate and plastic cracking, it is characterized in that, comprise base plate (2), be arranged at the upper side template (1) with base plate (2) formation mold of base plate (2) and be arranged on the crack-induced device (5) in mold.
2. according to claim 1 a kind of for evaluating the test unit of concrete surface evaporation rate and plastic cracking, it is characterized in that, described base plate (2) is square, four side templates (1) are arranged at respectively on four limits of base plate (2), between side template (1) and base plate (2), be connected with cruciform bolt (3), between adjacent side template (1), connect with hexagon socket head cap screw (4).
3. according to claim 1 a kind ofly it is characterized in that for evaluating the test unit of concrete surface evaporation rate and plastic cracking, described side template (1) is outside equipped with handle.
4. according to claim 1 a kind ofly it is characterized in that for evaluating the test unit of concrete surface evaporation rate and plastic cracking, described crack-induced device (5) is closed hollow triangular prism structure, and bottom welding is on base plate (2).
5. according to claim 4 a kind ofly it is characterized in that for evaluating the test unit of concrete surface evaporation rate and plastic cracking, described base plate (2) is square, length of side 300mm, and thickness is 5mm; The height of side template (1) is 100mm, and thickness is 10mm; Crack-induced device (5) bottom length of side 300mm, its lap is welded by stainless steel steel disc, thickness 1.5mm, crack-induced device (5) xsect bottom side length is 50mm, height is 63.5mm.
6. it is characterized in that for evaluating the test unit of concrete surface evaporation rate and plastic cracking according to a kind of described in claim 4 or 5, described crack-induced device (5) has three, equidistantly be arranged in parallel.
7. according to claim 6 a kind ofly it is characterized in that for evaluating the test unit of concrete surface evaporation rate and plastic cracking, between described crack-induced device (5), spacing is 50mm, and crack-induced device (5) is 25mm with side template (1) spacing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320797540.8U CN203595645U (en) | 2013-12-05 | 2013-12-05 | Testing device for evaluating evaporation rate and plastic cracking of concrete surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320797540.8U CN203595645U (en) | 2013-12-05 | 2013-12-05 | Testing device for evaluating evaporation rate and plastic cracking of concrete surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203595645U true CN203595645U (en) | 2014-05-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320797540.8U Expired - Lifetime CN203595645U (en) | 2013-12-05 | 2013-12-05 | Testing device for evaluating evaporation rate and plastic cracking of concrete surface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203595645U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104458551A (en) * | 2014-12-05 | 2015-03-25 | 中南大学 | Experimental structure for nondestructive testing of inner reinforcement corrosion state of concrete |
-
2013
- 2013-12-05 CN CN201320797540.8U patent/CN203595645U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104458551A (en) * | 2014-12-05 | 2015-03-25 | 中南大学 | Experimental structure for nondestructive testing of inner reinforcement corrosion state of concrete |
| CN104458551B (en) * | 2014-12-05 | 2017-06-16 | 中南大学 | A kind of experimental configuration for Non-Destructive Testing steel rust in concrete state |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140514 |
|
| CX01 | Expiry of patent term |