CN204044152U - A kind of device measuring cement-based material self-constriction amount - Google Patents
A kind of device measuring cement-based material self-constriction amount Download PDFInfo
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- CN204044152U CN204044152U CN201420456554.8U CN201420456554U CN204044152U CN 204044152 U CN204044152 U CN 204044152U CN 201420456554 U CN201420456554 U CN 201420456554U CN 204044152 U CN204044152 U CN 204044152U
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Abstract
The utility model is about a kind of device measuring cement-based material self-constriction amount, relate to building material field, the cement-based material self-constriction amount solving existing cement-based material self-constriction instrument mensuration is too large with actual error, can not evaluate the stability of cement-based material exactly.The technical scheme of main employing is: the device of this mensuration cement-based material self-constriction amount comprises casing and buret, casing offers the inlet for injecting liquid in casing, for by casing liquid discharge liquid outlet and be used for opening casing tested cement-based material to be put into the hermatic door of casing; Buret is provided with scale value, and buret is arranged on the top of casing, and is communicated with box house.The utility model is mainly used in the self-constriction amount realizing measuring exactly cement-based material, to evaluate the stability of cement-based material exactly.
Description
Technical field
The utility model relates to a kind of building material field, particularly relates to a kind of volumetric method mensuration that utilizes as the device of the self-constriction amount of the cement-based materials such as concrete.
Background technology
Along with the development of society and the progress of Building technology, the requirement of the cement-based materials such as concrete is also improved constantly.High strength, the high-performance even cement-based material of very-high performance occur in succession, and the common feature of these cement-based materials is that water-cement ratio is low, cement mark is high, cement consumption is large and is mixed with the levigate active blending material of more amount.This composition then causes that the aquation of premature gelation material is fast, free water in cement-based material consumes rapidly, produces self-desiccation phenomenon, thus cause macroscopical volume to reduce while inner structure is closely knit.Above-mentioned this phenomenon is self-constriction.The self-constriction of cement-based material can cause the inside of cement-based material to produce tension, and this tension increases along with the increase of self-constriction amount, when tension exceedes the ultimate tensile strength (UTS) of cement-based material, cement-based material can produce crack, simultaneously due to effect that stress is concentrated, the crack produced can be continued expansion and be extended under the effect of stress, thus causes cement-based material structural damage.
In order to seek the crack reducing the approach of cement-based material self-constriction, the stability of reinforcement cement-based material volume and the generation of cement-based material inside can be controlled well, need to carry out periodic measurement to the self-constriction amount of cement-based material.Existing cement-based material self-contraction determinator device is mainly through measuring the change of cement-based material sample lineal measure, and weighed the self-constriction deflection of cement-based material by the change of cement based sample lineal measure, to weigh the volume stability of cement-based material further.
Utility model people finds to have larger error between the change meeting of the cement-based material sample lineal measure that above-mentioned cement-based material self-contraction determinator device measures and cement-based material actual drawdown deformation amount, therefore it can not evaluate the stability of cement-based material well.
Utility model content
In view of this, the utility model embodiment provides a kind of device fundamental purpose measuring cement-based material self-constriction amount to be to measure the self-constriction amount of cement-based material exactly, to evaluate the stability of cement-based material exactly.
For achieving the above object, the utility model mainly provides following technical scheme:
On the one hand, the utility model embodiment also provides a kind of device measuring cement-based material self-constriction amount, and this device comprises:
Casing, it offers the inlet for injecting liquid in described casing, for by described casing liquid discharge liquid outlet and be used for opening described casing tested cement-based material to be put into the hermatic door of described casing;
Buret, is provided with scale value, and described buret is arranged on the top of described casing, and is communicated with described box house.
The device of foregoing mensuration cement-based material self-constriction amount, is also provided with suspended structure in described casing, for being suspended in described casing by tested cement-based material.
The device of foregoing mensuration cement-based material self-constriction amount, described inlet is connected with input duct, and described input duct is provided with liquid flowmeter in the position near described inlet, for measuring the volume injecting liquid in casing.
The device of foregoing mensuration cement-based material self-constriction amount, is connected with level(l)ing device under described bottom half; Described level(l)ing device comprises multiple horizontal adjustment screw and surveyor's staff;
Described horizontal adjustment screw is arranged on the bottom of described casing, for regulating the levelness of described casing;
Whether described surveyor's staff horizontal setting, on casing, is in horizontality to detect described casing.
The device of foregoing mensuration cement-based material self-constriction amount, the side plate that described casing has top board, base plate and is connected with described top board, base plate;
The material of the side plate of described casing is organic glass, and the material of described box bottom is steel.
The device of foregoing mensuration cement-based material self-constriction amount, described buret is kapillary, and the diameter of described kapillary is 0.05-1mm.
The device of foregoing mensuration cement-based material self-constriction amount, the open at one end away from described casing of described buret is arranged.
A kind of device measuring cement-based material self-constriction amount that the utility model embodiment proposes at least has the following advantages:
Cement-based material to be measured need be placed in casing when measuring by the device of the mensuration cement-based material self-constriction amount that the utility model embodiment provides, and injects liquid, and the liquid level of liquid is in buret in casing.By being placed in casing by the cement-based material before and after curing period, in casing, injecting the water of equivalent, according to the difference of liquid level in buret, the self-constriction amount of cement-based material during curing period can be obtained.And the self-constriction amount of cement-based material is when being its mass conservation, the phenomenon that its volume reduces, with of the prior art by measure cement-based material just measure cement-based material lineal measure change compared with (change of lineal measure can not be equal to the change of cement-based material volume, therefore its error is larger, and the self-constriction distortion of cement-based material can not be evaluated so well), the utility model embodiment can determine the self-constriction volume of cement-based material, more be close to actual amount of contraction, therefore the self-constriction amount that the device of cement-based material self-constriction amount that the present embodiment provides measures is little with actual error, the self-constriction distortion of cement-based material can be evaluated better.
Further, the buret that the device of the mensuration cement-based material self-constriction amount that the utility model embodiment provides only needs casing and is arranged on casing top just can carry out determination test, therefore its structure is simple, cost is lower.
Further, the buret in the device of the mensuration cement-based material self-constriction amount that the utility model embodiment provides adopts kapillary, and because the precision of kapillary is high, therefore it can measure the self-constriction amount of cement-based material more accurately.
Further, the device of the mensuration cement-based material self-constriction amount that the utility model embodiment provides, by arranging level(l)ing device at the bottom of case, to regulate the levelness of casing, makes casing maintenance level, in order to avoid affect the reading of liquid level in buret, and cause measurement inaccurate.
Further, cement based sample to be measured is suspended in casing by adopting suspended structure by the device of the mensuration cement-based material self-constriction amount that the utility model embodiment provides, to reduce the friction of cement based sample and casing, and cement based sample structure to be measured changed cause to produce the distortion of other types and affect the result of measurement.
Above-mentioned explanation is only the general introduction of technical solutions of the utility model, in order to better understand technological means of the present utility model, and can be implemented according to the content of instructions, coordinates accompanying drawing to be described in detail as follows below with preferred embodiment of the present utility model.
Accompanying drawing explanation
A kind of structural representation measuring the device of cement-based material self-constriction amount that Fig. 1 provides for an embodiment of the present utility model;
A kind of structural representation measuring the device of the self-constriction amount of cement-based material that Fig. 2 provides for another embodiment of the present utility model.
Embodiment
For further setting forth the utility model for the technological means reaching predetermined utility model object and take and effect, below in conjunction with accompanying drawing and preferred embodiment, to according to the embodiment of the utility model application, structure, feature and effect thereof, be described in detail as follows.In the following description, the not necessarily same embodiment that different " embodiment " or " embodiment " refers to.In addition, special characteristic, structure or feature in one or more embodiment can be combined by any suitable form.
As shown in Figure 1, an embodiment of the present utility model provides a kind of device measuring cement-based material self-constriction amount, and this device comprises casing 1 and buret 2.Wherein, casing 1 offers the inlet 11 for injecting liquid in casing 1, for by casing 1 liquid discharge liquid outlet 12 and be used for opening casing 1, cement-based material to be measured to be put into the hermatic door 13 of casing 1.Buret 2 is provided with scale value, and buret 2 is arranged on the top of casing 1, and is communicated with the inside of casing 1.
The device of the mensuration cement-based material self-constriction amount that the present embodiment provides is when carrying out mensuration cement-based material self-constriction amount, first opening the hermatic door 13 being arranged on casing 1 is placed in casing 1 by cement based sample to be measured, hermatic door 13 is closed, in casing 1, liquid (liquid injected is preferably water) is filled subsequently by the inlet 11 be arranged on casing 1, and a certain scale making the liquid level in casing 1 rise on buret 2 (also first can fill liquid in casing, instillation liquid in vector tube again, make the liquid level of this liquid corresponding with a certain scale value on buret), record this scale value, and record the total amount of liquid of injection.Afterwards, after liquid in casing is discharged by the liquid outlet 12 be arranged on casing, open hermatic door 13 cement based sample to be measured is taken out, and the curing box putting into routine carries out maintenance, until after prescribed time-limit, cement based sample to be measured is put into again the casing 1 of the device that the present embodiment provides, and in casing 1, inject the liquid with above-mentioned steps moderate, record the scale value of the liquid level in now buret 2, the self-constriction amount of cement-based material to be measured can be obtained by liquid level difference in twice buret 2.
Cement-based material self-constriction is when its mass conservation, the phenomenon that volume reduces, and cement-based material analyzer of the prior art just measures the change of cement-based material lineal measure, the change of lineal measure and the change of cement-based material volume make a big difference, and weighing cement-based material self-constriction amount (change of volume) by lineal measure change is a kind of coarse survey method.Just measure compared with cement-based material lineal measure changes with of the prior art by measuring cement-based material, the utility model embodiment can obtain the volume change of cement-based material to be measured by the change of liquid level in the buret of twice, front and back, namely the self-constriction volume of cement-based material is determined, more be close to actual amount of contraction, therefore the self-constriction amount that the device of cement-based material self-constriction amount that the present embodiment provides measures is little with actual error, the self-constriction distortion of cement-based material can be evaluated better.
Preferably, as shown in Figure 1, another embodiment of the utility model proposes a kind of device measuring cement-based material self-constriction amount, compared with above-described embodiment, suspended structure 3 is also provided with, for being suspended in casing 1 by cement based sample to be measured in casing 1 in the present embodiment.Suspended structure 3 can adopt hook.By being suspended in casing by cement based sample instead of being placed in the bottom of casing, can avoid making owing to there is friction force between casing and cement sample to be measured cement based sample structure to be measured to change the distortion causing producing other types and the result affecting measurement.
As shown in Figure 2, preferably, another embodiment of the present utility model proposes a kind of device measuring cement-based material self-constriction amount, compared with above-described embodiment, also level(l)ing device is comprised for the device measuring cement-based material self-constriction amount in the present embodiment, for making casing 1 keep horizontality, to make measurement more accurate.Particularly, level(l)ing device comprises multiple horizontal adjustment screw 4 and surveyor's staff 5.Wherein multiple horizontal adjustment screw is arranged on the bottom of casing 1, and surveyor's staff 5 is flatly placed on casing 1 (can be arranged on the top of casing, or inner bottom part, and other being convenient to the place observed).By the levelness of horizontal adjustment screw adjustable case body, and whether be in horizontality according to the reading detection casing of surveyor's staff.
Preferably, another embodiment of the present utility model proposes a kind of device measuring cement-based material self-constriction amount, and compared with above-described embodiment, the liquid outlet 12 in the present embodiment is preferably arranged on the position of the close bottom of casing 1 side.Inlet 11 is preferably arranged on the top of casing 1, and hermatic door 13 is preferably arranged on the top of casing 1.In addition, inlet 11, liquid outlet 12 are respectively arranged with the valve controlling water inlet and water outlet.
Preferably, another embodiment of the present utility model proposes a kind of device measuring cement-based material self-constriction amount, and compared with above-described embodiment, the liquid outlet 12 in the present embodiment is connected with fluid pipeline, and be tightly connected with fluid pipeline, fluid pipeline is provided with switch valve.Inlet 11 is connected with input duct, and is tightly connected by O-ring seal and input duct.Preferably, input duct is provided with volume capacity meter in the position near inlet 11, to record the volume injecting liquid in casing 1.
Preferably, the side plate that the casing 1 in above-described embodiment has top board and base plate and is connected with top board and base plate.Buret 2 is arranged on top board, and top board is also provided with inlet, hermatic door; Liquid outlet is arranged on side plate.Preferably, the material of the side plate of casing 1 is organic glass, and the material of casing 1 base plate is steel.In addition, the material of buret 2 is glass.
Preferably, the open at one end away from casing 1 of the buret 2 in above-described embodiment is arranged, to make the environment in casing consistent with the external world.
Preferably, the buret 2 in above-described embodiment is kapillary, and the diameter of this kapillary is 0.05mm-1mm.The diameter of kapillary is thinner, and its precision measuring the self-constriction amount of cement-based material is higher, and its precision can reach 5 μm.
Preferably, the hermatic door in above-described embodiment, inlet and liquid outlet place are respectively arranged with O-ring seal, to prevent the leaked liquid in casing.
When the device of the mensuration cement-based material self-constriction amount utilizing above-described embodiment to provide carries out the self-constriction amount measuring cement-based material, mainly comprise the steps:
1, cement-based material to be measured is built in a flexible bag, after vacuumizing, form the sample to be tested of a hermetically-sealed construction;
By cement-based material to be measured is built in the good flexible bag of a sealing in this step, vacuumize, flexible bag is sealed with cement-based material and contacts, to avoid wrapping up air in flexible bag.Thus make cement-based material when there is self-constriction distortion, flexible bag is along with cement-based material generation self-constriction distortion, and the flexible bag that hermetically-sealed construction is good in addition can be avoided the liquid comes into contact that injects in cement-based material to be measured and casing and be out of shape to the self-constriction of cement-based material to be measured and impact.Flexible bag in this step is preferably rubber bag.
2, sample to be tested is placed in casing, in casing, injects liquid from inlet, and make liquid enter in described buret, the scale value of recorded amounts intraluminal fluid position and inject the total amount of liquid in casing;
3, sample to be tested is taken out in casing, put into curing box and carry out maintenance;
In this step, after sample to be tested is taken out from casing, and the liquid in casing is discharged from liquid outlet.
4, after the curing period of regulation, sample to be tested is placed in casing, and in casing, injects liquid from inlet, and the total amount injecting liquid is consistent with the total amount that above-mentioned steps injects liquid, records the scale value of liquid level in described buret;
5, the self-shrinking value of cement-based material just can be obtained according to the difference of twice liquid level in buret.
Wherein, following formula is adopted can to calculate the self-constriction amount of cement-based material:
V＝π×(D/2)
2×(M-N)；
Wherein, M is sample to be tested scale value of liquid level in buret when being placed on before curing period in the device for measuring cement-based material self-constriction amount, N is sample to be tested scale value of liquid level in buret when being placed on after curing period in the device for measuring cement-based material self-constriction amount, V is the self-constriction volume after the curing period of regulation of cement-based material to be measured, and D is the diameter of buret.
To sum up, cement-based material to be measured need be placed in casing when measuring by the device of the mensuration cement-based material self-constriction amount that the utility model embodiment provides, and injects liquid, and the liquid level of liquid is in buret in casing.By being placed in casing by the cement-based material before and after curing period, in casing, injecting the water of equivalent, according to the difference of liquid level in buret, the self-constriction amount of cement-based material during curing period can be obtained.And the self-constriction amount of cement-based material is when its mass conservation, the phenomenon that its volume reduces, with of the prior art by measure cement-based material just measure cement-based material lineal measure change compared with (change of lineal measure can not be equal to the change of cement-based material volume, therefore its error is larger, and the self-constriction distortion of cement-based material can not be evaluated so well), the utility model embodiment can determine the self-constriction volume of cement-based material, more be close to actual amount of contraction, therefore the self-constriction amount that the device of cement-based material self-constriction amount that the present embodiment provides measures is little with actual error, the self-constriction distortion of cement-based material can be evaluated better.
The above, it is only preferred embodiment of the present utility model, not any pro forma restriction is done to the utility model, the any simple modification done above embodiment according to technical spirit of the present utility model, equivalent variations and modification, all still belong in the scope of technical solutions of the utility model.
Claims (7)
1. measure a device for cement-based material self-constriction amount, it is characterized in that, this device comprises:
Casing, it offers the inlet for injecting liquid in described casing, for by described casing liquid discharge liquid outlet and be used for opening described casing tested cement-based material to be put into the hermatic door of described casing;
Buret, is provided with scale value, and described buret is arranged on the top of described casing, and is communicated with described box house.
2. device according to claim 1, is characterized in that, is also provided with suspended structure in described casing, for being suspended in described casing by tested cement-based material.
3. device according to claim 1, is characterized in that, described inlet is connected with input duct, and described input duct is provided with liquid flowmeter in the position near described inlet, for measuring the volume injecting liquid in described casing.
4. device according to claim 1, is characterized in that, is connected with level(l)ing device under described bottom half; Described level(l)ing device comprises multiple horizontal adjustment screw and surveyor's staff;
Described horizontal adjustment screw is arranged on the bottom of described casing, for regulating the levelness of described casing;
Whether described surveyor's staff horizontal setting, on casing, is in horizontality to detect described casing.
5. device according to claim 1, is characterized in that, the side plate that described casing has top board, base plate and is connected with described top board, base plate;
The material of the side plate of described casing is organic glass, and the material of described box bottom is steel.
6. device according to claim 1, is characterized in that, described buret is kapillary, and the diameter of described kapillary is 0.05-1mm.
7. the device according to any one of claim 1-6, is characterized in that, the open at one end away from described casing of described buret is arranged.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104155433A (en) * | 2014-08-13 | 2014-11-19 | 中国建筑材料科学研究总院 | Device and method for determining self-shrinkage of cement-based material |
| CN105424887A (en) * | 2015-12-09 | 2016-03-23 | 中国石油天然气股份有限公司 | Method for measuring expansion rate of inorganic water shutoff agent and device thereof |
-
2014
- 2014-08-13 CN CN201420456554.8U patent/CN204044152U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104155433A (en) * | 2014-08-13 | 2014-11-19 | 中国建筑材料科学研究总院 | Device and method for determining self-shrinkage of cement-based material |
| CN104155433B (en) * | 2014-08-13 | 2016-05-04 | 中国建筑材料科学研究总院 | A kind of device and method of measuring cement-based material self-constriction amount |
| CN105424887A (en) * | 2015-12-09 | 2016-03-23 | 中国石油天然气股份有限公司 | Method for measuring expansion rate of inorganic water shutoff agent and device thereof |
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Address after: 100024 No. 1, East Lane, Chaoyang District, Beijing, Guanzhuang Patentee after: CHINA BUILDING MATERIALS ACADMEY Address before: 100024 No. 1, East Lane, Chaoyang District, Beijing, Guanzhuang Patentee before: CHINA BUILDING MATERIALS ACADEMY |
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Effective date of registration: 20190624 Address after: 100024 No. 1, East Lane, Chaoyang District, Beijing, Guanzhuang Patentee after: Beijing Zhongyanyi Engineering Technology Development Center Co.,Ltd. Address before: 100024 No. 1, East Lane, Chaoyang District, Beijing, Guanzhuang Patentee before: CHINA BUILDING MATERIALS ACADMEY |
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