CN107525764A - For testing cast-in-place composite construction interlayer tensile bond strength test specimen and method of testing - Google Patents
For testing cast-in-place composite construction interlayer tensile bond strength test specimen and method of testing Download PDFInfo
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- CN107525764A CN107525764A CN201710723227.2A CN201710723227A CN107525764A CN 107525764 A CN107525764 A CN 107525764A CN 201710723227 A CN201710723227 A CN 201710723227A CN 107525764 A CN107525764 A CN 107525764A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/04—Measuring adhesive force between materials, e.g. of sealing tape, of coating
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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Abstract
One kind is used to test cast-in-place composite construction interlayer tensile bond strength test specimen and method of testing, and wherein method of testing includes step 1, the making of test specimen；Step 2, three test specimens are prepared according to the method in step 1, then test specimen is symmetrically put into the center of the figure of eight fixture of cupping machine, starts testing machine and give test specimen loading, until destroying；Step 3, judge whether measured value is effective；Step 4, if judging, measured value is effective, and the intensity level of the tensile bond strength of test specimen is calculated.The present invention solves traditionally that mortar tensile bond strength testing method measuring accuracy is not high, every group of a fairly large number of technical problem of test test specimen.
Description
Technical field
It is more particularly to a kind of to be used to test cast-in-place composite construction interlayer tensile bond strength examination the invention belongs to building field
Part and method of testing.
Background technology
Because mortar is to collectively form an entirety with basic unit, as motar and materials for wall are bonded together composition one
Face wall, ground mortar and flooring, ground etc. be bonded together form one layer of terrace, thus adhesion strength be one of mortar very
Important performance, only mortar have certain cohesive force in itself, effective bonding could be realized with basic unit, and keep this for a long time
Kind stability, enables mortar and basic unit's cooperation；Otherwise, mortar is easily having tension or shear stress caused by various deformation
Under effect, hollowing occurs, the quality problems such as ftracture, come off
Mortar tensile bond strength testing method measuring principle is roughly the same at present, is coated on cube hardening basic unit block
Facing mortar, after mortar hardening in 28 days, high-strength adhesive is smeared on facing mortar, then puts upper fixture aligned position
On the adhesive, and ensure that upper fixture is not crooked, continue to conserve 24h.Then test specimen is put into cupping machine, using stretching
Method determines its tensile bond strength, but tests that are not quite similar such as the matrix block used, coating layer thickness, one-time formed quantity
Such as motar, interface processing mortar, Polymer cement materials, external heat insulation cementing and decorative mortar, putty use
70mm × 70mm × 20mm cement mortar block is as substrate masses, one test specimen of one-shot forming；And gravity flowing levelling mortar, ceramic tile glue
The matrix concrete slab of the uses such as mortar is tied, 10 test blocks of one-shot forming, some is then not added with, and this results in mortar stretch-bonded
The method of testing of intensity is chaotic, is made troubles to operator, also add the investment of instrument and equipment simultaneously, this method of testing
Influence factor is more, and data discrete is big, and destruction interface is various, and data are difficult that analysis judges, every group of adhesion strength, which needs to test, to be tried
Part is more, and workload is big, and is only suitable for testing the adhesion strength that rigidified substrate smears mortar with after, can not test cast-in-place base material and facing
The composite construction interlayer tensile bond strength formed after mortar hardening.
The content of the invention
The present invention proposes one kind and is used to test cast-in-place composite construction interlayer tensile bond strength test specimen and method of testing,
Solve traditionally not high and every group of a fairly large number of technology of test test specimen of mortar tensile bond strength testing method measuring accuracy to ask
Topic.
To achieve the above object, the present invention adopts the following technical scheme that.
One kind is used to test cast-in-place composite construction interlayer tensile bond strength test specimen, includes left draw unit and right stretching
Unit；The left draw unit and right draw unit collectively form a figure of eight entirety, and on figure of eight entirety
Short axle is symmetrical, is made wherein left draw unit pours for base material, and right draw unit is poured for facing mortar and is made；The left side
The thickness of draw unit and right draw unit is 35 ~ 40mm, and the Mosaic face of the two is vertical rectangular surfaces；Wherein, splice
The length in face is 40 ~ 55mm, and width is 35 ~ 40mm.
Preferably, the base material of the left draw unit includes the raw material of following parts by weight：Cement：25%~30%；Sand：
50%~60%；Water：12.5~15%；Wherein cement is portland cement, Portland cement, and the grade of cement is GB175's
42.5 grades, 52.5 grades, sand uses medium coarse sand.
Preferably, the diameter of the horizontal section of the left draw unit and right draw unit is 45 ~ 60mm.
A kind of method of testing for being used to test cast-in-place composite construction interlayer tensile bond strength test specimen, including step are as follows.
Step 1, the making of test specimen；It is comprised the following steps that.
Step 1, base material and facing mortar are prepared.
Step 2, figure of eight mould is placed on horizontal bottom plate, and brushed on the madial wall of figure of eight mould
Releasing agent.
Step 3, dividing plate is inserted at the longitudinal axis positions of figure of eight mould, figure of eight mould is separated into left die unit
With right die unit, wherein the top of the dividing plate exceeds the top of figure of eight mould, the length of dividing plate and figure of eight mould
Spacing is adapted between front and back sides at longitudinal axis positions.
Step 4, the base material prepared is cast in left die unit, while facing mortar is cast in right mould tool
In unit.
Step 5, base material and facing mortar are plugged and pounded respectively, after base material and facing mortar are closely knit every
Plate detaches.
Step 6, before base material and facing mortar initial set, figure of eight mould is placed and shaken on bumper, makes basic unit
Material and facing mortar mutually bond, and form left draw unit and right draw unit respectively.
Step 7, curing in the mold is carried out to the test specimen for pouring completion, form removal natural curing is carried out extremely after design strength to be achieved
28 days.
Step 2, three test specimens are prepared according to the method in step 1, test specimen is symmetrically then put into cupping machine
Figure of eight fixture center, start testing machine and give test specimen loading, until destroy.
Step 3, judge whether measured value is effective.
Step 4, if judging, measured value is effective, and the intensity level of the tensile bond strength of test specimen is calculated.
Preferably, height of the top of the dividing plate beyond the top of figure of eight mould is 10 ~ 20mm.
Preferably, the dividing plate is plastic plate or steel plate.
Preferably, the time plugged and pounded in step 5 is 1 ~ 2min, and figure of eight mould is placed in step 6 shakes on bumper
The dynamic time is 2 ~ 3 seconds.
Preferably, the specific method of the judgement in step 3 is,
If the difference of maximum and median is not more than 20% in three measured values, and the difference of minimum value and median is not more than
20%, three measured values are effective；
If the difference in three measured values in maximum or minimum value if any one and median is more than 20%, the maximum value of difference
It is invalid；
If the difference of maximum and median is more than 20% in three measured values, and the difference of minimum value and median is more than 20%,
Three measured values are invalid, the process of repeat step one to step 3.
Preferably, the intensity level specific method of the tensile bond strength of the calculation testing piece of step 4 is,
When three measured values are effective, the average value of three measured values is taken as the intensity level of tensile bond strength；
When have in three measured values one it is invalid when, take the average value of two other effective measured value as the intensity of tensile bond strength
Value.
Compared with prior art the invention has the characteristics that and beneficial effect.
1st, the influence factor compared with traditional method of testing of the method for testing in the present invention is small, and adhesion strength destroys interface feelings
Condition is single, bond strength between layers that can be between authentic testing cast-in-place composite construction hardening latter two material.
2nd, the test material preparation in the present invention is simple, and influence factor is few, and measuring accuracy is high, and test test specimen is few, method of testing letter
Just it is quick.
3rd, the destruction situation of the test specimen in the present invention is single, can be widely applied to interlayer after the hardening of layered cast-in-situ composite construction
Tensile bond strength, had broad application prospects in the large-scale engineering construction in China.
4th, of the invention compared with existing bond strength testing method, the base material in the present invention is with facing mortar same
Made simultaneously in one mould, without making base material sample block in advance, and the bonding interface among test specimen is minimum, is broken during test
Position is in Bonding interface, and bond strength between layers that can be between the cast-in-place composite construction hardening latter two material of authentic testing influence
Factor is few, and measuring accuracy is high, and test test specimen is few, and method of testing is simple and efficient.
Brief description of the drawings
Fig. 1 is the planar structure schematic diagram that test specimen is made in the step one of the present invention.
Fig. 2 is the side structure schematic diagram that test specimen is made in the step one of the present invention.
Reference：1 left draw unit, 2-right draw unit, 3-figure of eight mould, 4-bottom plate, 5-dividing plate.
Embodiment
As illustrated, this be used to test cast-in-place composite construction interlayer tensile bond strength test specimen, include Zola and stretch list
Member 1 and right draw unit 2；The left draw unit 1 and right draw unit 2 collectively form a figure of eight entirety, and on
The overall short axle of the figure of eight is symmetrical, is made wherein left draw unit 1 pours for base material, right draw unit 2 is facing mortar
Pour and be made；The thickness of the left draw unit 1 and right draw unit 2 is 35 ~ 40mm, and the Mosaic face of the two is vertical
Rectangular surfaces；Wherein, the length of Mosaic face is 40 ~ 55mm, and width is 35 ~ 40mm.
In the present embodiment, the base material of the left draw unit 1 includes the raw material of following parts by weight：Cement：27%；Sand：
58%；Water：15%；Wherein cement uses in GB175 Portland cements 42.5 grades, and sand is from the middle sand for meeting JGJ52；Wet concentration
With the water supply standard for meeting JGJ63.
Certainly in other embodiments, the cement can also use portland cement, portland cement and common silicic acid
The intensity of salt cement can be from 42.5 grades and 52.5 grades.
In the present embodiment, the diameter of the horizontal section of the left draw unit 1 and right draw unit 2 is 45 ~ 60mm.
This method of testing for being used to test cast-in-place composite construction interlayer tensile bond strength test specimen, including step are as follows.
Step 1, the making of test specimen；It is comprised the following steps that.
Step 1, base material and facing mortar are prepared.
Step 2, figure of eight mould 3 is placed on horizontal bottom plate 4, and applied on the madial wall of figure of eight mould 3
Brush releasing agent, wait to do, be standby.
Step 3, at the longitudinal axis positions of figure of eight mould 3, i.e., dividing plate is inserted at the middle part smallest cross-sectional of figure of eight mould 3
5, figure of eight mould 3 is separated into left die unit and right die unit, wherein the top of the dividing plate 5 exceeds figure of eight mould
The top of tool 3, spacing is adapted between the front and back sides at the length and the longitudinal axis positions of figure of eight mould 3 of dividing plate 5.
Step 4, the base material prepared is cast in left die unit, while facing mortar is cast in right mould tool
In unit.
Step 5, base material and facing mortar are plugged and pounded, after base material and facing mortar are closely knit, dividing plate 5
Detach, without adhesive between base material and facing mortar.
Step 6, before base material and facing mortar initial set, figure of eight mould 3 is placed and shaken on bumper, makes base
Layer material and facing mortar mutually bond, and form left draw unit 1 and right draw unit 2 respectively.
Step 7, curing in the mold is carried out to the test specimen for pouring completion, form removal natural curing is carried out extremely after design strength to be achieved
28 days.
Step 2, one group of three test specimen is prepared according to the method in step 1, then test specimen is symmetrically put into stretching examination
The center of the figure of eight fixture of machine is tested, testing machine is started and gives test specimen loading, until destroying.
Step 3, judge whether measured value is effective；Specific method is：
If the difference of maximum and median is not more than 20% in three measured values, and the difference of minimum value and median is not more than
20%, three measured values are effective；
If the difference in three measured values in maximum or minimum value if any one and median is more than 20%, the maximum value of difference
It is invalid；
If the difference of maximum and median is more than 20% in three measured values, and the difference of minimum value and median is more than 20%,
Three measured values are invalid, the process of repeat step one to step 3.
Step 4, if judging, measured value is effective, and the intensity level of the tensile bond strength of test specimen is calculated, specially when three
When measured value is effective, the average value of three measured values is taken as the intensity level of tensile bond strength；
When have in three measured values one it is invalid when, take the average value of two other effective measured value as the intensity of tensile bond strength
Value.
In the present embodiment, the height that the top of the dividing plate 5 exceeds the top of figure of eight mould 3 is 10 ~ 20mm.
In the present embodiment, the dividing plate 5 is plastic plate
Certain dividing plate 5 described in other embodiments can also be steel plate either alloy sheets or iron plate.
In the present embodiment, the time plugged and pounded in step 5 is 1min.
In the present embodiment, the time shaken in step 6 on the placement of figure of eight mould 3 bumper is 2 seconds.
Content described in this specification embodiment is only enumerating to the way of realization of inventive concept, protection of the invention
Scope is not construed as being only limitted to the concrete form that embodiment is stated, protection scope of the present invention covers people in the art
Member according to present inventive concept it is conceivable that equivalent technologies mean.
Claims (9)
1. one kind is used to test cast-in-place composite construction interlayer tensile bond strength test specimen, it is characterised in that：Include Zola and stretch list
Member（1）With right draw unit（2）；The left draw unit（1）With right draw unit（2）A figure of eight entirety is collectively formed,
And the short axle overall on the figure of eight is symmetrical, wherein left draw unit（1）Pour and be made for base material, right draw unit
（2）Pour and be made for facing mortar；The left draw unit（1）With right draw unit（2）Thickness be 35 ~ 40mm, and two
The Mosaic face of person is vertical rectangular surfaces；Wherein, the length of Mosaic face is 40 ~ 55mm, and width is 35 ~ 40mm.
It is 2. according to claim 1 a kind of for testing cast-in-place composite construction interlayer tensile bond strength test specimen, its feature
It is：The left draw unit（1）Base material include the raw materials of following parts by weight：Cement：25%~30%；Sand：50%~60%；
Water：12.5~15%；Wherein cement is portland cement or position Portland cement；The grade of cement is the 42.5 of GB175
Level or 52.5 grades；Sand or coarse sand during sand uses.
It is 3. according to claim 2 a kind of for testing cast-in-place composite construction interlayer tensile bond strength test specimen, its feature
It is：The left draw unit（1）With right draw unit（2）The diameter of horizontal section be 45 ~ 60mm.
4. the method for testing for being used to test cast-in-place composite construction interlayer tensile bond strength test specimen described in a kind of claim 3,
It is characterised in that it includes step is as follows：
Step 1, the making of test specimen；It is comprised the following steps that：
Step 1, base material and facing mortar are prepared；
Step 2, by figure of eight mould（3）It is placed on horizontal bottom plate（4）On, and in figure of eight mould（3）Madial wall on
Brushing releasing agent；
Step 3, in figure of eight mould（3）Longitudinal axis positions at insert dividing plate（5）, by figure of eight mould（3）It is separated into left mould
Have unit and right die unit, wherein the dividing plate（5）Top exceed figure of eight mould（3）Top, dividing plate（5）Length
Degree and figure of eight mould（3）Spacing is adapted between front and back sides at longitudinal axis positions；
Step 4, the base material prepared is cast in left die unit, while facing mortar is cast in right die unit
In；
Step 5, base material and facing mortar are plugged and pounded respectively, dividing plate after base material and facing mortar are closely knit
（5）Detach；
Step 6, before base material and facing mortar initial set, by figure of eight mould（3）Place and shaken on bumper, make basic unit
Material and facing mortar mutually bond, and form left draw unit respectively（1）With right draw unit（2）；
Step 7, curing in the mold is carried out to the test specimen for pouring completion, form removal is carried out after design strength to be achieved；
Step 2, three test specimens are prepared according to the method in step 1, then test specimen are symmetrically put into " 8 " of cupping machine
The center of font fixture, start testing machine and give test specimen loading, until destroying；
Step 3, judge whether measured value is effective；
Step 4, if judging, measured value is effective, and the intensity level of the tensile bond strength of test specimen is calculated.
A kind of 5. test side for being used to test cast-in-place composite construction interlayer tensile bond strength test specimen according to claim 4
Method, it is characterised in that：The dividing plate（5）Top exceed figure of eight mould（3）The height at top be 10 ~ 20mm.
A kind of 6. test side for being used to test cast-in-place composite construction interlayer tensile bond strength test specimen according to claim 5
Method, it is characterised in that：The dividing plate（5）For plastic plate or steel plate.
A kind of 7. test side for being used to test cast-in-place composite construction interlayer tensile bond strength test specimen according to claim 4
Method, it is characterised in that：The time plugged and pounded in step 5 is 1 ~ 2min；Figure of eight mould in step 6（3）Place on bumper
The time of vibrations is 2 ~ 3 seconds.
A kind of 8. test side for being used to test cast-in-place composite construction interlayer tensile bond strength test specimen according to claim 4
Method, it is characterised in that：The specific method of judgement in step 3 is,
If the difference of maximum and median is not more than 20% in three measured values, and the difference of minimum value and median is not more than
20%, three measured values are effective；
If the difference in three measured values in maximum or minimum value if any one and median is more than 20%, the maximum value of difference
It is invalid；
If the difference of maximum and median is more than 20% in three measured values, and the difference of minimum value and median is more than 20%,
Three measured values are invalid, the process of repeat step one to step 3.
A kind of 9. test side for being used to test cast-in-place composite construction interlayer tensile bond strength test specimen according to claim 8
Method, it is characterised in that：The intensity level specific method of the tensile bond strength of the calculation testing piece of step 4 is,
When three measured values are effective, the average value of three measured values is taken as the intensity level of tensile bond strength；
When have in three measured values one it is invalid when, take the average value of two other effective measured value as the intensity of tensile bond strength
Value.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108444792A (en) * | 2018-06-26 | 2018-08-24 | 云南省交通规划设计研究院 | Binding performance test molding die and its test method between a kind of concrete layer |
| CN108982183A (en) * | 2018-08-07 | 2018-12-11 | 宁波联城住工科技有限公司 | A kind of preparation method and test method, mold of concrete sample |
| CN110346282A (en) * | 2019-07-09 | 2019-10-18 | 中南大学 | Interface bonding strength test device and test method between a kind of cement-based material |
| CN110421691A (en) * | 2019-08-14 | 2019-11-08 | 安徽省交通控股集团有限公司 | Bonding strength test model preparation method between Cement Concrete Deck Paving Course |
| CN110501223A (en) * | 2019-08-26 | 2019-11-26 | 湖北省工业建筑集团有限公司 | A kind of irregular aggregate test specimen, bonding tensile strength test method and device |
| CN113092365A (en) * | 2021-04-12 | 2021-07-09 | 深圳大学 | Device and method for measuring interface bonding stress |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108444792A (en) * | 2018-06-26 | 2018-08-24 | 云南省交通规划设计研究院 | Binding performance test molding die and its test method between a kind of concrete layer |
| CN108444792B (en) * | 2018-06-26 | 2024-05-03 | 云南省交通规划设计研究院股份有限公司 | Forming die for testing bonding performance between concrete layers and testing method thereof |
| CN108982183A (en) * | 2018-08-07 | 2018-12-11 | 宁波联城住工科技有限公司 | A kind of preparation method and test method, mold of concrete sample |
| CN110346282A (en) * | 2019-07-09 | 2019-10-18 | 中南大学 | Interface bonding strength test device and test method between a kind of cement-based material |
| CN110421691A (en) * | 2019-08-14 | 2019-11-08 | 安徽省交通控股集团有限公司 | Bonding strength test model preparation method between Cement Concrete Deck Paving Course |
| CN110501223A (en) * | 2019-08-26 | 2019-11-26 | 湖北省工业建筑集团有限公司 | A kind of irregular aggregate test specimen, bonding tensile strength test method and device |
| CN110501223B (en) * | 2019-08-26 | 2020-03-31 | 湖北省工业建筑集团有限公司 | Irregular aggregate test piece, and method and device for testing bonding tensile strength |
| CN113092365A (en) * | 2021-04-12 | 2021-07-09 | 深圳大学 | Device and method for measuring interface bonding stress |
| CN113092365B (en) * | 2021-04-12 | 2022-11-08 | 深圳大学 | Device and method for measuring interface bonding stress |
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