CN209570596U - Cement-based material morning age self-constriction and the dry dual-purpose tester of contraction - Google Patents
Cement-based material morning age self-constriction and the dry dual-purpose tester of contraction Download PDFInfo
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- CN209570596U CN209570596U CN201821867864.3U CN201821867864U CN209570596U CN 209570596 U CN209570596 U CN 209570596U CN 201821867864 U CN201821867864 U CN 201821867864U CN 209570596 U CN209570596 U CN 209570596U
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- screw rod
- adjusting screw
- bellows
- constriction
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Abstract
The utility model proposes a kind of early age self-constriction of cement-based material and the dry dual-purpose testers of contraction comprising has main support and displacement sensor；Main support includes test block bracket and 2 pieces of perpendicular supporting plates；Displacement sensor includes sensor main body and measuring rod, and sensor main body is fixed on one piece of perpendicular supporting plate of main support, and measuring rod is pierced by from perpendicular supporting plate；It particularly further include having adjusting screw rod and bellows, the coaxial arrangement of the measuring rod of adjusting screw rod and displacement sensor, there is screw rod perforation on another piece of perpendicular supporting plate of main support, adjusting screw rod activity passes through screw rod perforation and is connected with adjusting nut, the position that adjusting nut moves adjusting screw rod is screwed, to adjust adjusting screw rod at a distance from the measuring rod of displacement sensor；Bellows is placed between adjusting screw rod and the measuring rod of displacement sensor, and the both ends of bellows, which have, to be open and closed by corking.The utility model can realize the continuous monitoring of cement-based material self-constriction, have the characteristics that it is easy to operate quickly, measure reliable and stable and accuracy it is high.
Description
Technical field
The utility model relates to field of measuring technique, are particularly used for made of the cement-based materials such as measurement cement, mortar
The shrinking percentage of test block or the device of expansion rate.
Background technique
Compared with traditional cement-based material, UHPC (ultra-high performance concrete) material have superelevation it is strong, it is anti-folding and it is impervious
The advantages that performance is good, but self-constriction deformation is big.Self-constriction can cause micro-crack, and intensity and durability is caused to decline.Therefore, just
Really the self-constriction of measurement cement-based material is extremely important.Self-constriction refers to the condition that cement-based material is exchanged in constant temperature and no moisture
Under volume macroscopic view change and occur cubic deformation.Self-constriction is divided into two parts, and the self-constriction of induction period and self-desiccation draw
The self-constriction risen is also influenced by early hydration reaction.Cement-base composite material self-watering starts shrink, therefore ideal
Test mode should be self-watering mix and stir molding after tested immediately.The method of measurement self-constriction has volumetric method and length
Method.The principle of volumetric method is exactly to weigh in encroached water after cement slurry being packed into closed elastomer bag, passes through weight change
The volume contraction of slurry is calculated, the disadvantages of the method are as follows bleeding all can after the air sucked in slurry whipping process and molding
Very big error is brought to test result, in addition, the permeability of rubber bag can also bring very big error to test result.Length
The measurement of method avoids the defect of volumetric method, but length method begins to self-constriction test after the completion of can not stirring from slurry, early
The size of phase self-constriction is unable to measure, and test result is not accurate enough.It is therefore desirable to improve.
Summary of the invention
The purpose of this utility model is to propose a kind of early age self-constriction of cement-based material and the dry dual-purpose tester of contraction,
The continuous monitoring that cement-based material self-constriction can be achieved, with easy to operate spy quick, measurement is reliable and stable and high accuracy
Point.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of early age self-constriction of cement-based material and the dry dual-purpose tester of contraction comprising there is main support and displacement to pass
Sensor；The main support includes test block bracket and 2 pieces of perpendicular supporting plates, and the both ends of the test block bracket are connected to 2 pieces of perpendicular branch
On plate；Institute's displacement sensors include sensor main body and the measuring rod that is connected on sensor main body, and sensor main body is solid
Due on one piece of perpendicular supporting plate of main support, measuring rod is pierced by from perpendicular supporting plate；It is characterized by also including have adjusting screw rod and ripple
Pipe.
The measuring rod of the adjusting screw rod and displacement sensor is coaxially disposed, and has spiral shell on another piece of perpendicular supporting plate of main support
Bar perforation, the screw rod that adjusting screw rod activity passes through main support perforate and are threaded with adjusting nut, and it is removable to screw adjusting nut
The position of dynamic adjusting screw rod, to realize adjustment adjusting screw rod at a distance from the measuring rod of displacement sensor.
The bellows is placed between adjusting screw rod and the measuring rod of displacement sensor, and the both ends of bellows have opening simultaneously
It is closed respectively by corking.
Prioritization scheme, the corking of bellows described in the utility model have cover and piston part, and the cover is one end tool
Have opening cylindrical housings, its be tightly placed in outside the open end of bellows, the piston part be in cover middle part cylindrical body,
In its open end for tightly inserting in bellows.
Scheme is advanced optimized, the inner wall of the screw rod perforation on the perpendicular supporting plate of main support described in the utility model, which has, to be connected
It connects screw thread and is threadedly coupled with adjusting screw rod.
Further prioritization scheme is also threaded with location nut on adjusting screw rod described in the utility model, screws
Location nut and adjusting nut to the two sides of perpendicular supporting plate can secured adjusted screw rod, with secured adjusted screw rod.
Further prioritization scheme, the test block bracket on main support described in the utility model are parallel by least 2 guide rods
Interval is constituted, and guide rod end vertically connects perpendicular supporting plate.
The utility model has following substantive distinguishing features and progress.
1, in the utility model, first is that using the deformation of length ability of bellows, by the volume of cement-based material self-constriction
Variation is converted into the length variation of bellows, realizes that cement-based material self-watering mixes and stirs the continuous monitoring for starting self-constriction, effectively
The influence avoided because of gravity, temperature change and mould constraint to test result；Second is that by adjusting screw rod and adjusting nut,
It plays and adjusts adjusting screw rod at a distance from the measuring rod of displacement sensor, realize the quick positioning of bellows, have and improve measurement
Efficiency, and ensure to start to measure as early as possible, the effect to improve accuracy of measurement.
2, the screw rod on the perpendicular supporting plate of main support is further perforated and is threadedly coupled with adjusting screw rod by the utility model, plays
The effect for radially positioning adjusting screw rod, avoids adjusting screw rod from teetertottering, further ensures that the stability of test block stress, can have
Effect improves test accuracy and stability.
3, the utility model further positions adjusting screw rod by location nut, and adjusting screw rod in test process is avoided to be touched
It touches to the movement of test block direction, test accuracy and stability can be effectively improved.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the use state diagram of the utility model.
Fig. 3 is the structural schematic diagram of the bellows of the utility model.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing.
Embodiment
Referring to figs. 1 to Fig. 3, a kind of early age self-constriction of cement-based material and the dry dual-purpose tester of contraction comprising have
Main support 1, displacement sensor 2, adjusting screw rod 3 and bellows 4.
The main support 1 includes test block bracket and 2 pieces of perpendicular supporting plates 11, and test block bracket is by 3 10 parallel interval structures of guide rod
At 10 end of guide rod vertically connects perpendicular supporting plate 11.
Institute's displacement sensors 2 include sensor main body 21 and the measuring rod 20 that is connected on sensor main body 21, are passed
Sensor main body 21 is fixed on one piece of perpendicular supporting plate 11 of main support 1, and measuring rod 20 is pierced by from perpendicular supporting plate 11.
The measuring rod 20 of the adjusting screw rod 3 and displacement sensor 2 is coaxially disposed, the perpendicular supporting plate 11 of another piece of main support 1
It above perforates with screw rod and its inner wall has connection screw thread, adjusting screw rod 3 is threadedly connected in the screw rod perforation of main support 1, adjusts
Section screw rod 3 is connected with adjusting nut 31 in the inside thread of perpendicular supporting plate 11, is connected with positioning spiral shell in the outside screw for erecting supporting plate 11
Mother 32.It screws adjusting nut 31 and moves the position of adjusting screw rod 3, to realize adjustment adjusting screw rod 3 and displacement sensor 2
The distance of measuring rod 20.Screw location nut 32 and adjusting nut 31 to the two sides of perpendicular supporting plate 11 can secured adjusted screw rod 3, with solid
Determine adjusting screw rod 3.
The bellows 4 is placed between adjusting screw rod 3 and the measuring rod 20 of displacement sensor 2, and the both ends of bellows 4 have
It is open and is closed respectively by corking 40.With specific reference to Fig. 3, the corking 40 has cover 41 and piston part 42, and the cover 41 is
One end has the cylindrical housings of opening, outside its open end for being tightly placed in bellows 4, the piston part 42 be in cover 41 in
In the cylindrical body in portion, its open end for tightly inserting in bellows 4.
Using the present embodiment analyzer when, the corking 40 open at one end of bellows 4 is extracted, cement-based material is poured into
In bellows 4, after filling, corking 40 is got back into the open end of bellows, then bellows 4 is placed on main support 1 as early as possible
Between adjusting screw rod 3 and the measuring rod 20 of displacement sensor 2；Later, mobile bellows 4 and adjusting screw rod 3, make adjusting screw rod 3
Push up one end to bellows 4, the other end top of bellows 4 then screws 32 He of location nut to the measuring rod 20 of displacement sensor 2
After fixing the position of adjusting screw rod 3, displacement sensor 2 is returned to zero, starts to carry out to the two sides of perpendicular supporting plate 11 for adjusting nut 31
Test measures the length variation that bellows 4 occurs with the self-constriction of cement-based material by displacement sensor 2, realizes
Measurement to cement-based material self-constriction, have the characteristics that it is easy to operate quickly, measure reliable and stable and accuracy it is high, so as to standard
Really measure and analyze the volume stability and durability of cement-based material.
Claims (5)
1. cement-based material morning age self-constriction and the dry dual-purpose tester of contraction comprising have main support (1) and displacement sensing
Device (2)；The main support (1) includes test block bracket and 2 pieces of perpendicular supporting plates (11), and the both ends of the test block bracket are connected to
On 2 pieces of perpendicular supporting plates (11)；Institute's displacement sensors (2) include sensor main body (21) and are connected on sensor main body (21)
Measuring rod (20), sensor main body (21) is fixed on one piece of perpendicular supporting plate (11) of main support (1), measuring rod (20) Cong Shuzhi
Plate (11) is pierced by；It is characterized by also including have adjusting screw rod (3) and bellows (4)；
The measuring rod (20) of the adjusting screw rod (3) and displacement sensor (2) is coaxially disposed, the perpendicular branch of another piece of main support (1)
There is screw rod perforation, the screw rod that adjusting screw rod (3) activity passes through main support (1) perforates and is threaded with adjusting on plate (11)
Nut (31) screws adjusting nut (31) and moves the position of adjusting screw rod (3), to realize adjustment adjusting screw rod (3) and position
The distance of the measuring rod (20) of displacement sensor (2)；
The bellows (4) is placed between adjusting screw rod (3) and the measuring rod (20) of displacement sensor (2), and the two of bellows (4)
End has opening and is closed respectively by corking (40).
2. the early age self-constriction of cement-based material according to claim 1 and the dry dual-purpose tester of contraction, feature exist
In: the corking (40) of the bellows (4) has cover (41) and piston part (42), and the cover (41) is that one end has opening
Outside cylindrical housings, its open end for being tightly placed in bellows (4), the piston part (42) is the cylinder at the middle part in cover (41)
In body, its open end for tightly inserting in bellows (4).
3. the early age self-constriction of cement-based material according to claim 1 or 2 and the dry dual-purpose tester of contraction, feature
Be: the inner wall of screw rod on the perpendicular supporting plate (11) of the main support (1) perforation have connection screw thread and with adjusting screw rod (3)
It is threadedly coupled.
4. the early age self-constriction of cement-based material according to claim 1 or 2 and the dry dual-purpose tester of contraction, feature
It is: is also threaded with location nut (32) on the adjusting screw rod (3), screws location nut (32) and adjusting nut (31)
To perpendicular supporting plate (11) two sides can secured adjusted screw rod (3), with secured adjusted screw rod (3).
5. the early age self-constriction of cement-based material according to claim 1 or 2 and the dry dual-purpose tester of contraction, feature
Be: the test block bracket on the main support (1) is made of at least 2 guide rod (10) parallel intervals, and guide rod (10) end vertically connects
Connect perpendicular supporting plate (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821867864.3U CN209570596U (en) | 2018-11-14 | 2018-11-14 | Cement-based material morning age self-constriction and the dry dual-purpose tester of contraction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821867864.3U CN209570596U (en) | 2018-11-14 | 2018-11-14 | Cement-based material morning age self-constriction and the dry dual-purpose tester of contraction |
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| Publication Number | Publication Date |
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| CN209570596U true CN209570596U (en) | 2019-11-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821867864.3U Active CN209570596U (en) | 2018-11-14 | 2018-11-14 | Cement-based material morning age self-constriction and the dry dual-purpose tester of contraction |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111855974A (en) * | 2020-07-30 | 2020-10-30 | 安徽理工大学 | Measuring device for self-shrinkage of cement mortar test piece |
-
2018
- 2018-11-14 CN CN201821867864.3U patent/CN209570596U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111855974A (en) * | 2020-07-30 | 2020-10-30 | 安徽理工大学 | Measuring device for self-shrinkage of cement mortar test piece |
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