CN207336327U - For testing cast-in-place composite construction interlayer tensile bond strength test specimen - Google Patents
For testing cast-in-place composite construction interlayer tensile bond strength test specimen Download PDFInfo
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- CN207336327U CN207336327U CN201721051703.2U CN201721051703U CN207336327U CN 207336327 U CN207336327 U CN 207336327U CN 201721051703 U CN201721051703 U CN 201721051703U CN 207336327 U CN207336327 U CN 207336327U
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Abstract
One kind is used to test cast-in-place composite construction interlayer tensile bond strength test specimen, includes left draw unit and right draw unit；The left draw unit and right draw unit collectively form a figure of eight entirety, and symmetrical on the short axle of figure of eight entirety, are made wherein left draw unit pours for base material, and right draw unit is poured for facing mortar and is made；The thickness of the left draw unit and right draw unit 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.The utility model 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
The utility model belongs to building field, more particularly to a kind of strong for testing cast-in-place composite construction interlayer stretch-bonded
Spend test specimen.
Background technology
Since mortar is to collectively form an entirety with basic unit, as plastering mortar 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 to be worked together with basic unit；Otherwise, mortar is easily having tension or shear stress caused by various deformation
Under effect, hollowing occurs, the quality problems such as crack, come off；
Mortar tensile bond strength testing method measuring principle is roughly the same at present, is all on cube hardening basic unit block
Facing mortar is coated, after mortar hardening in 28 days, high-strength adhesive is smeared on facing mortar, then by upper fixture to normotopia
Put on the adhesive, and ensure that upper fixture is not crooked, continue to conserve 24h.Then test specimen is put into cupping machine, using drawing
The method stretched measures its tensile bond strength, but tests the phase not to the utmost such as the matrix block used, coating layer thickness, one-time formed quantity
Used with such as plastering mortar, interface processing mortar, Polymer cement materials, external heat insulation cementing and decorative mortar, putty etc.
The cement mortar block of 70mm × 70mm × 20mm is as substrate masses, one test specimen of one-pass molding；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-pass molding, some is then not added with, and this results in mortar stretch-bonded
The test method of intensity is chaotic, makes troubles to operator, also add the investment of instrument and equipment at the same time, this test method
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, heavy workload, 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.
Utility model content
It is used to test cast-in-place composite construction interlayer tensile bond strength test specimen the utility model proposes one kind, solves to pass
System ground not high and every group of a fairly large number of technical problem of test test specimen of mortar tensile bond strength testing method measuring accuracy.
To achieve the above object, the utility model adopts the following technical solution.
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 cement mortar；The cement mortar is by following parts by weight
Raw material：Cement：25%~30%；Sand：50%~60%；Water：12.5 ~ 15% are formed；Wherein cement is portland cement, normal silicate
Cement, the grade of cement are 42.5 grades of GB175, and 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.
The utility model has the characteristics that and beneficial effect compared with prior art.
1st, the influence factor compared with traditional test method of the test method in the utility model is small, and adhesion strength destroys boundary
Face situation 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 utility model is simple, and influence factor is few, and measuring accuracy is high, and test test specimen is few, test side
Method is simple and efficient.
3rd, the destruction situation of the test specimen in the utility model is single, after can be widely applied to the hardening of layered cast-in-situ composite construction
Interlayer tensile bond strength, has broad application prospects in the large-scale engineering construction in China.
4th, the utility model is compared with existing bond strength testing method, base material and facing in the utility model
Mortar makes at the same time in same mould, and without making base material sample block in advance, and the bonding interface among test specimen is minimum, surveys
Fracture position is in Bonding interface during examination, and interlaminar bonding that can be between the cast-in-place composite construction hardening latter two material of authentic testing is strong
Degree, influence factor is few, and measuring accuracy is high, and test test specimen is few, and test method is simple and efficient.
Brief description of the drawings
The planar structure schematic diagram of test specimen is made in the step of Fig. 1 is the utility model one.
The side structure schematic diagram of test specimen is made in the step of Fig. 2 is the utility model one.
Reference numeral：1 left draw unit, 2-right draw unit, 3-figure of eight mould, 4-bottom plate, 5-partition plate.
Embodiment
As shown in the figure, 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 short axle of figure of eight entirety 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 cement mortar；The cement mortar is by following weight
The raw material of part：Cement：27%；Sand：58%；Water：15% is formed；Wherein cement uses in GB175 Portland cements 42.5 grades,
Sand selects the middle sand for meeting JGJ52；The wet concentration 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 select 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 test method 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 is applied on the madial wall of figure of eight mould 3
Brush releasing agent, waits to do, is spare.
Step 3, at the longitudinal axis positions of figure of eight mould 3, i.e., partition plate is inserted at 3 middle part smallest cross-sectional of figure of eight mould
5, figure of eight mould 3 is separated into left die unit and right die unit, wherein the top of the partition plate 5 exceeds figure of eight mould
The top of tool 3, spacing is adapted between the front and back sides at 3 longitudinal axis positions of length and figure of eight mould of partition plate 5.
Step 4, prepared base material 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, partition 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 is 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, judges 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 value is effective；
If the difference in three measured values in maximum or minimum value if any one and median is more than 20%, difference is maximum
Value 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 tensile bond strength
Intensity level.
In the present embodiment, the height that the top of the partition plate 5 exceeds the top of figure of eight mould 3 is 10 ~ 20mm.
In the present embodiment, the partition plate 5 is plastic plate, and the partition plate 5 can also be steel plate in other embodiments certainly
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 utility model design, this practicality is new
The protection domain of type is not construed as being only limitted to the concrete form that embodiment is stated, the scope of protection of the utility model covers
Those skilled in the art according to the utility model design it is conceivable that equivalent technologies mean.
Claims (3)
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 on figure of eight entirety 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 cement mortar；Wherein cement is portland cement or position ordinary silicon
Acid salt cement；The grade of cement is 42.5 grades or 52.5 grades of GB175；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.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107525764A (en) * | 2017-08-22 | 2017-12-29 | 中国建筑股份有限公司 | For testing cast-in-place composite construction interlayer tensile bond strength test specimen and method of testing |
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2017
- 2017-08-22 CN CN201721051703.2U patent/CN207336327U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107525764A (en) * | 2017-08-22 | 2017-12-29 | 中国建筑股份有限公司 | For testing cast-in-place composite construction interlayer tensile bond strength test specimen and method of testing |
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