CN207908411U - A kind of chute type thermal expansion coefficient of concrete measuring device - Google Patents
A kind of chute type thermal expansion coefficient of concrete measuring device Download PDFInfo
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- CN207908411U CN207908411U CN201820186664.5U CN201820186664U CN207908411U CN 207908411 U CN207908411 U CN 207908411U CN 201820186664 U CN201820186664 U CN 201820186664U CN 207908411 U CN207908411 U CN 207908411U
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Abstract
A kind of chute type thermal expansion coefficient of concrete measuring device of the utility model, include experimental test case and testing element, in test box internal backplane, it is respectively arranged with two parallel vertical, horizontal slideways, one piece of fixed end template is placed at one end of test box and tank wall distance 10cm, fixed end template is securely connect by bolt with test box bottom plate；In the side of fixed end template, one piece of fixed bolster plate is arranged in side, and fixed bolster plate is secured by bolts on test box bottom plate, and slidably side template is arranged in the other side；Slidably top template is arranged in the other end, and slidably top template is vertically arranged with two pieces of side templates, and slidably top template can be slided along two end slipways；Fixed end template, fixed bolster plate, slidably side template and slidably the bottom plate of top template and test box forms semi enclosed area domain.The utility model is simple in structure, requires use environment that low, manufacturing cost is low, high certainty of measurement, user of service are easy to operate.
Description
Technical field
The measuring device more particularly to a kind of chute type that the utility model measures thermal expansion coefficient of concrete are mixed
Solidifying soil coefficient of thermal expansion measuring device.
Background technology
With the extensive use of high performance concrete, concrete bracing problem becomes increasingly conspicuous, and influences concrete cracking
Concrete early stage volume unstability caused by the main reason for performance is its self-constriction and thermally expands.Concrete heat expansion system
Number refer to unit length or volume concrete under unit temperature variation the variable quantity of length or volume, it is the main of material
One of physical characteristic parameter is generally characterized with average thermal linear expansion coefficient.The coefficient of thermal expansion of concrete is usually with equipressure
Under the conditions of unit temperature variation caused by volume change indicate.Therefore, formula α may be used in the coefficient of thermal expansion of concrete
=Δ V/ (V * Δ T) is indicated.Wherein, α is the coefficient of thermal expansion of concrete, and V is the volume of concrete block, and Δ V is concrete
The volume change of block, Δ T are the temperature change of concrete block.Thermal expansion coefficient of concrete is research concrete temperature stress hair
The important indicator of exhibition, it is to realize to measure coefficient of thermal expansion using accurate, reliable, convenient thermal expansion coefficient of concrete measuring device
The precondition correctly judged.The thermal expansion coefficient of concrete measuring device of the prior art is primarily present following two problems：One
Be can not completely simulation concrete coefficient of thermal expansion development：Enter mould to pre-hardening stage, pervious concrete in concrete
Coefficient of thermal expansion measuring device can only measure it is concrete curing after coefficient of thermal expansion, to the determination part of thermal expansion coefficient of concrete
Point missing, therefore the later stage also cannot very well simulation concrete temperature stress progress curve.Second is that off-test is torn open
Unload trouble：Existing thermal expansion coefficient of concrete measuring device needs to be crushed concrete test object therein after testing,
Can piecemeal take out, the cleaning work for later stage laboratory increases certain human cost.The utility model to be solved
Certainly the technical issues of, is to provide a kind of low manufacturing cost, high certainty of measurement, the maneuverable concrete heat expansion of engineering staff
Coefficient measuring device.
Utility model content
The purpose of this utility model is to provide a kind of chute type thermal expansion coefficient of concrete measuring device, the measuring device knot
Structure is simple, manufacturing cost is low, measurement accuracy is accurate, easy to operate, applied widely.
Of the existing technology in order to solve the problems, such as, the technical solution adopted in the utility model is as follows：
A kind of chute type thermal expansion coefficient of concrete measuring device includes experimental test case and testing element, is testing
In case internal backplane, two parallel vertical, horizontal slideways are respectively arranged with, are put at one end of test box and tank wall distance 10cm
One piece of fixed end template is set, fixed end template is securely connect by bolt with test box bottom plate；In the side of fixed end template, one
One piece of fixed bolster plate is arranged in side, and fixed bolster plate is secured by bolts on test box bottom plate, and the other side, which is arranged one piece, to be slided
Dynamic side template, slidably side template can be along two transverse slipways slidings；One round hole is set on slidably side template；It is surveying
One piece of slidably top template is arranged in the other end for trying case, and slidably top template is vertically arranged with two pieces of side templates, slidably backform
Plate can be slided along two end slipways；One round hole is slidably set on top template；Fixed end template, fixed bolster plate, can
It slides side template and slidably the bottom plate of top template and test box forms semi enclosed area domain, for holding fresh concrete sample；
The testing element includes two stay-supported type displacement sensors, four electric furnaces and two thermocouple sensors,
It fixing the top of end template, fixed bolster plate, be respectively disposed vertically one piece of plastic top plate, plastics higher than concrete sample upper surface
Top plate and the fixation end template and fixed bolster plate of lower section distinguish strong bond, and bracing wire formula displacement sensor is placed on plastic top
On plate, the other end of two bracing wires is separately fixed at slidably top template and slidably on side template；
In one thermocouple sensor Transducers Embedded in Concrete sample, another is positioned over inside test box, makes case by electric furnace
Interior temperature increases, and the test box reserves three holes respectively on two longitudinal panels, and testing element conducting wire is existed by setting
Hole on test box side plate is connected with outer harvesting portion.
The test box is held by the six face assembly movables that copolymerized methanal plastic plate and thermal insulation material collectively constitute
Body.
The slidably side template and slidably on top template, is located at height medium position, along plate laterally setting one
Arrange the hole of a diameter of 0.5cm, heart septum 1cm in each two adjacent holes.
Two parallel longitudinal slideways are symmetrically disposed in the medium position of slidably top template.
Two horizontally-parallel slideways are symmetrically disposed in the medium position of slidably side template.
The fixation end template, fixed bolster plate, slidably side template and slidably top template height is equal.
The test method of the measuring device, includes the following steps：
（1）Each testing element is uniformly placed in test box, and conducting wire is connected by hole with outer harvesting portion；
（2）Support wooden unit is placed in slidably top template, slidably between side template bottom and tank wall, by slidably backform
Plate, slidably side template, fixed end template, side template collectively constitute a semiclosed region, and the concrete stirred evenly is added
Enter in semiclosed region, during casting concrete, by a thermocouple sensor and four fine steel rib Transducers Embedded in Concrete
In sample, wherein two fine steel ribs are put along the placed longitudinally of test box, in addition two fine steel ribs along the transverse direction of test box
It sets；
（3）Concreting finishes, will be embedded in advance it is in concrete sample, along the placed longitudinally thin steel of test box
The muscle other end penetrates the hole being set at slidably top template height medium position, meanwhile, it will be laterally disposed along test box
The fine steel rib other end penetrate the hole being set at slidably side template height medium position, fine steel rib passes through binding with template
Mode securely connect；
（4）Two guy type displacement meters are fixed, measure and record concrete sample along the initial of longitudinal and transverse two directions
Distance is denoted as X respectively0、Y0；Poured concrete sample height is measured, Z is denoted as；Meanwhile utilizing two thermocouple sensors
The initial temperature in concrete sample and test box is measured and recorded respectively, is denoted as T respectivelyh0、Tx0；Set all measurements
After element, it will be positioned over slidably top template, slidably the support wooden unit taking-up between side template bottom and tank wall, cover test
The upper panel of case, makes concrete sample expand or shrink under field conditions (factors), pushes slidably top template respectively and can
Sliding side template generates displacement on end slipway and transverse slipway；By the displacement meter of both direction to position caused by sample
The acquisition in real time of shift-in row, passes through formula（1）~（4）It calculates, obtains concrete from mould is entered to coefficient of thermal expansion before curing；
（5）After concrete sample solidification, is heated by electric furnace, cover the upper panel of test box, allow concrete
Sample continues to thermally expand；At this point, two thermocouple sensors respectively carry out the temperature in concrete sample and test box
Acquisition in real time, and the displacement occurred in two directions by the concrete sample under displacement sensor different temperatures；
Utilize formula（1）~（4）It calculates, obtains coefficient of thermal expansion at ambient temperature after concrete sample cures；
（6）Assuming that concrete sample is in TiAt a temperature of, due to thermally expanding, the displacement generated in both direction is respectively
Xi、Yi, it is assumed that the height Z of concrete sample does not change, and passes through following equation（1）~（4）Calculate the heat of concrete sample
The coefficient of expansion：
V=X0Y0Z (1)
ΔV=(Xi-X0)(Yi-Y0) Z (2)
ΔT=Ti-Th0 (3)
α=Δ V/ (V * Δ T) (4)
Wherein, α is the coefficient of thermal expansion of concrete, and V is the initial volume of concrete sample, and Δ V is concrete sample
Volume change, Δ T are the temperature change of concrete sample.
Advantage and advantageous effect are possessed by the utility model：
A kind of chute type thermal expansion coefficient of concrete measuring device of the utility model is simple in structure, to use environment requirement
It is low, manufacturing cost is low, high certainty of measurement, user of service are easy to operate.To the real time measure to thermal expansion coefficient of concrete, from
It is middle to select the concrete mix optimized, concrete that also be with simulation concrete under different phase, condition of different temperatures
Temperature stress development controls the generation of distress in concrete to the maximum extent, to realize the purpose for improving concrete durability,
With good promotional value.
Description of the drawings
Fig. 1 is a kind of vertical view of chute type thermal expansion coefficient of concrete measuring device of the utility model；
Fig. 2 is a kind of elevation of chute type thermal expansion coefficient of concrete measuring device of the utility model.
In figure：End template, 5 fixed bolster plates, 6 are fixed slidably in 1 test box panel, 2 end slipways, 3 transverse slipways, 4
Slidably top template, 8 concrete samples, 9 stay-supported type displacement sensors, 10 electric furnaces, 11 thermocouple sensors, 12 modelings of side template, 7
Expect top plate, 13 fine steel ribs, 14 support wooden units, 15 electric furnace conducting wire holes, 16 thermocouple sensor conducting wire holes, 17 stay-supported displacements
Sensor conductor hole.
Specific implementation mode
The utility model is described in further detail below in conjunction with the accompanying drawings：
As shown in Figure 1：A kind of thermal expansion coefficient of concrete measuring device, by experimental test case and the common structure of testing element
At.The test box is that one kind can assembled movable container body.Six pieces of test box panels 1 are by copolymerized methanal plastic plate and thermal insulation material
It collectively forms.In test box internal backplane, longitudinally disposed two parallel end slipways 2, transversely setting two is parallel
Transverse slipway 3.On along longitudinal direction, in one end of test box, one piece of fixed end template 4, fixed bottom are placed with tank wall distance 10cm
Template is securely connect by bolt with test box bottom plate.In the side of fixed end template 4, perpendicular to the side of this fixation end template 4
Upwards, one piece of fixed bolster plate 5 is arranged in side, and fixed bolster plate is secured by bolts on test box bottom plate.And the other side is set
One piece of slidably side template 6 is set, slidably side template 6 can be slided along two transverse slipways 3 for be set to test box bottom plate for this
It is dynamic.Herein slidably on side template 6, it is located at height medium position, the hole of a diameter of 0.5cm of a row is laterally set along plate,
Heart septum 1cm in each two adjacent holes.It is perpendicular with side template 5,6 in the other end of test box along the longitudinal direction of test box
On direction, one piece of slidably top template 7 is set, and slidably top template 7 can be along two longitudinal directions for being set to test box bottom plate for this
It is slided on slideway 2.Herein slidably on top template 7, it is located at height medium position, along plate, laterally one row of setting is a diameter of
The hole of 0.5cm, heart septum 1cm in each two adjacent holes.The bottom plate of above-mentioned four pieces of templates and test box forms semi enclosed area
Domain, for holding fresh concrete sample 8.The testing element includes stay-supported type displacement sensor, electric furnace and thermocouple
Sensor is disposed vertically one piece of plastic top plate 12, plastic top at the top of fixed end template 4, higher than 8 upper surface of concrete sample
The fixation end template strong bond of plate and lower section, on this plastic top plate 12 place one draw Linear displacement transducer 9, bracing wire it is another
One end is fixed on slidably top template 7, the length variation generated in the longitudinal direction for measuring concrete sample.Equally, solid
Determine the top of side template 5, be disposed vertically another piece of plastic top plate 12 higher than 8 upper surface of concrete sample, on this fixed plastics top
On plate 12, a stay-supported type displacement sensor 9 is also placed, the other end of bracing wire is fixed on slidably side template 6, mixed for measuring
The length variation that solidifying soil sample generates in the horizontal.Two stay-supported type displacement sensors 9 are individually positioned in plastic top plate
12 edge so that the initial length of initial and concrete sample of bracing wire is equal.
In concrete sample 8, it is embedded to 4 fine steel ribs 13 in advance.Wherein, 2 fine steel ribs are put along the longitudinal direction of test box
It sets, and across the hole being reserved on slidably top template 7, binds and connect with it.Another 2 fine steel ribs along test box transverse direction
It places, and across the hole being reserved on slidably side template 6, binds and connect with it.
Inside test box, 4 electric furnaces 10 and 1 thermocouple sensor 11 are placed, another thermocouple sensor 11 is pre-
In first Transducers Embedded in Concrete sample 8.2 thermocouple sensors 11 can measure the temperature of the temperature inside the box and concrete sample respectively.
As shown in Fig. 2, a kind of thermal expansion coefficient of concrete measuring device elevation of the utility model, the two of test box
On block longitudinal panel, it is reserved with electric furnace conducting wire hole 15, thermocouple sensor conducting wire hole 16 and stay-supported displacement respectively and passes
Sensor conducting wire hole 17.The conducting wire of above-mentioned each testing element is connected by hole 15,16,17 with outer harvesting portion.
Two parallel longitudinal slideways 2, are symmetrically disposed in the medium position of slidably top template 7.
Two horizontally-parallel slideways 3, should be symmetrically disposed in the medium position of slidably side template 6.
The fixation end template 4, fixed bolster plate 5, slidably side template 6 and slidably 7 height of top template is equal, and
A hemi-closure space is surrounded jointly.
The test method of the concrete heat dilatometry device, including following measuring process：
（1）First by addition to test box top surface other five panels 1 and each plate for being set to inside test box pacify
It installs complete.Each testing element is uniformly placed in the case, and conducting wire is connected by hole 15~17 with outer harvesting portion；
（2）Before casting concrete sample 8, need first in slidably top template 7 and the slidably bottom of side template 6,
By way of placing support wooden unit 14 between tank wall at it, prevent it from generating initial displacement, and with fixed end template, side
The semi-enclosed region that template is together to form.Then, the concrete stirred evenly is added thereto, in casting concrete
During, it will be in the 13 Transducers Embedded in Concrete sample of fine steel rib of 1 thermocouple sensor 11 and 4 a diameter of 8mm.Wherein, 2
Fine steel rib is along the placed longitudinally of test box, and another 2 fine steel ribs are along the laterally disposed of test box.
（3）Concreting finishes, will be embedded in advance it is in concrete sample 8, along placed longitudinally thin of test box
13 other end of reinforcing bar penetrates the hole being set at slidably 7 height medium position of top template, meanwhile, it will be along test box transverse direction
13 other end of fine steel rib of placement penetrates the hole being set at slidably 6 height medium position of side template, fine steel rib and template
It is securely connected by way of binding, relative displacement cannot be generated between the two.
（4）Two guy type displacement meters 9 are fixed immediately, measure and record concrete sample 8 along longitudinal and transverse two sides
To initial distance, be denoted as X respectively0、Y0.Poured concrete sample height is measured, Z is denoted as.Meanwhile utilizing 2 thermocouples
Sensor 11 measures and records the initial temperature in concrete sample 8 and test box respectively, is denoted as T respectivelyh0、Tx0.It waits setting
After all measuring cells, and by be positioned over before slidably top template 7, slidably 6 bottom of side template between tank wall
It supports wooden unit 14 to take out, covers the upper panel of test box, concrete sample 8 is made to expand or shrink under field conditions (factors),
Slidably top template 7 is pushed respectively and slidably side template 6 generates displacement on end slipway 2 and transverse slipway 3.In this process
In, displacement caused by sample is acquired in real time by the displacement meter 9 of both direction, passes through formula（1）~（4）Meter
It calculates, concrete can be obtained from mould is entered to coefficient of thermal expansion before curing.
（5）It after the solidification of concrete sample 8, is heated by electric furnace 10, covers the upper panel of test box so that is mixed
Solidifying soil sample 8 continues to thermally expand.At this point, 2 thermocouple sensors 11 are respectively to the temperature in concrete sample 8 and test box
Degree is acquired in real time, and measures what the concrete sample 8 under different temperatures occurred in two directions by displacement sensor 9
Displacement.Utilize formula（1）~（4）Calculating, thermal expansion system at ambient temperature after concrete sample 8 cures can be obtained
Number.
（6）Assuming that concrete sample 8 is in TiAt a temperature of, due to thermally expanding, the displacement point of the generation in both direction
It Wei not Xi、Yi（Assuming that the height Z of concrete sample does not change）, then pass through following equation（1）~（4）Coagulation can be calculated
The coefficient of thermal expansion of soil sample 8
V=X0Y0Z (1)
ΔV=(Xi-X0)(Yi-Y0) Z (2)
ΔT=Ti-Th0 (3)
α=Δ V/ (V * Δ T) (4)
Wherein, α is the coefficient of thermal expansion of concrete sample, and V is the initial volume of concrete sample, and Δ V tries for concrete
The volume change of sample, Δ T are the temperature change of concrete sample.
Specific implementation mode described in the utility model does not constitute the limitation to the application range, every in structure of the present invention
Within the spirit and principle of think of, all any modification, equivalent and improvement that one of skill in the art can make etc. should all wrap
Containing within protection scope of the present invention.
Claims (6)
1. a kind of chute type thermal expansion coefficient of concrete measuring device, it is characterised in that：Include experimental test case and test member
Part is respectively arranged with two parallel vertical, horizontal slideways in test box internal backplane, one end of test box and tank wall away from
From one piece of fixed end template is placed at 10cm, fixed end template is securely connect by bolt with test box bottom plate；In fixed bed die
One piece of fixed bolster plate is arranged in the side of plate, side, and fixed bolster plate is secured by bolts on test box bottom plate, and the other side is set
One piece of slidably side template is set, slidably side template can be slided along two transverse slipways；One is arranged on slidably side template
Round hole；In the other end of test box, one piece of slidably top template is set, slidably top template is vertically arranged with two pieces of side templates,
Slidably top template can be slided along two end slipways；One round hole is slidably set on top template；Fixed end template, fixation
The bottom plate of side template, slidably side template and slidably top template and test box formed semi enclosed area domain, for hold newly mix it is mixed
Solidifying soil test test specimen；
The testing element includes two stay-supported type displacement sensors, four electric furnaces and two thermocouple sensors, solid
Determine end template, fixed bolster plate top, one piece of plastic top plate, plastic top plate are respectively disposed vertically higher than concrete sample upper surface
Distinguish strong bond with the fixation end template and fixed bolster plate of lower section, bracing wire formula displacement sensor is placed on plastic top plate
On, the other end of two bracing wires is separately fixed at slidably top template and slidably on side template；
In one thermocouple sensor Transducers Embedded in Concrete sample, another is positioned over inside test box, is made by electric furnace warm in case
Degree increases, and the test box reserves three holes respectively on two longitudinal panels, and testing element conducting wire is being tested by setting
Hole on case side plate is connected with outer harvesting portion.
2. a kind of chute type thermal expansion coefficient of concrete measuring device according to claim 1, it is characterised in that：Described
Test box is the six face assembly movable container bodies collectively constituted by copolymerized methanal plastic plate and thermal insulation material.
3. a kind of chute type thermal expansion coefficient of concrete measuring device according to claim 1, it is characterised in that：Described
Slidably side template and slidably on top template, be located at height medium position, along the lateral a diameter of 0.5cm of one row of setting of plate
Hole, heart septum 1cm in each two adjacent holes.
4. a kind of chute type thermal expansion coefficient of concrete measuring device according to claim 1, it is characterised in that：Described
Two parallel longitudinal slideways are symmetrically disposed in the medium position of slidably top template.
5. a kind of chute type thermal expansion coefficient of concrete measuring device according to claim 1, it is characterised in that：Described
Two horizontally-parallel slideways are symmetrically disposed in the medium position of slidably side template.
6. a kind of chute type thermal expansion coefficient of concrete measuring device according to claim 1, it is characterised in that：Described
Fixed end template, fixed bolster plate, slidably side template and slidably top template height is equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820186664.5U CN207908411U (en) | 2018-02-02 | 2018-02-02 | A kind of chute type thermal expansion coefficient of concrete measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820186664.5U CN207908411U (en) | 2018-02-02 | 2018-02-02 | A kind of chute type thermal expansion coefficient of concrete measuring device |
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| Publication Number | Publication Date |
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| CN207908411U true CN207908411U (en) | 2018-09-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108181347A (en) * | 2018-02-02 | 2018-06-19 | 沈阳建筑大学 | A kind of chute type thermal expansion coefficient of concrete measuring device and measuring method |
-
2018
- 2018-02-02 CN CN201820186664.5U patent/CN207908411U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108181347A (en) * | 2018-02-02 | 2018-06-19 | 沈阳建筑大学 | A kind of chute type thermal expansion coefficient of concrete measuring device and measuring method |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180925 Termination date: 20220202 |