CN104044200A - Molding frame used for testing mortar tensile adhesive strength and using method thereof - Google Patents
Molding frame used for testing mortar tensile adhesive strength and using method thereof Download PDFInfo
- Publication number
- CN104044200A CN104044200A CN201410167772.4A CN201410167772A CN104044200A CN 104044200 A CN104044200 A CN 104044200A CN 201410167772 A CN201410167772 A CN 201410167772A CN 104044200 A CN104044200 A CN 104044200A
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- Prior art keywords
- frame
- mortar
- shaping
- shaping frame
- pull bar
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/0094—Moulds for concrete test samples
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/04—Producing shaped prefabricated articles from the material by tamping or ramming
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/29—Producing shaped prefabricated articles from the material by profiling or strickling the material in open moulds or on moulding surfaces
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Sampling And Sample Adjustment (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a molding frame used for testing mortar tensile adhesive strength and a using method thereof and belongs to the technical field of building mortar property test. The molding frame comprises an opened side frame, a left connecting side frame, an upper connecting side frame, a buckling opening side frame and a pulling rod, wherein the side frames are mutually hinged through rotary shaft rivets; the pulling rod is arranged in the opened side frame; a buckling groove is formed in the buckling opening side frame; the pulling rod is clamped to and fixed to the buckling groove to form a square molding frame. The molding frame is simple in structure and convenient to operate, the phenomenon that the surrounding edges of a mortar test block warp upwards in the traditional de-molding process is avoided, and the secondary grinding process on the surface of the mortar test block after maintenance is eliminated, so that materials are saved, the working efficiency is improved, and meanwhile the accuracy of a testing result is guaranteed.
Description
Technical field
the invention belongs to building mortar technical field of performance test, be specifically related to a kind of shaping frame and using method thereof for the test of mortar tensile bond strength.
Background technology
Building mortar is by Binder Materials, fine aggregate and water, sometimes also mixes some admixture formulated according to a certain percentage.Conventionally mortar directly forms an entirety with basic unit, and therefore tensile bond strength is an important performance of mortar, relates at present the mortar that tensile bond strength tests and mainly comprises boundary mortar, anticracking grout and the adhesive etc. for external thermal insulation system.Carry out before the sticky strength test of mortar, important work is to make the mortar can regular moulding, according to tensile bond strength computing formula: f
at=F/A
z, in formula, F is failing load, A
zfor bond area, can find out, if A
zcontrolling bad meeting exerts an influence to the accuracy of result of the test.With reference to " building mortar basic performance tests method standard " (JGJ/T70-2009) pilot scale proved recipe law regulation, be of a size of 70mm × 70mm for the mortar shaping frame housing of measuring building mortar tensile bond strength, inside casing is of a size of 40mm × 40mm, thickness is 6mm, is fixed frame type structure.When test, shaping frame is placed in the forming surface of mortar specimen at the bottom of cement based, the mortar slurry preparing is inserted in shaping frame, plug and pound top real after, with the floating mortar of scraper surface, the demoulding gently.The shortcoming of prior art is: after each demoulding, mortar moulding test block edge can be upturned along with carrying on mould, or cause forming surface crooked, cause thus mortar specimen after maintenance in the time carrying out tensile bond strength test, the steel clamps of stretching use is difficult to mortar specimen surface bonding, need be by sand papering edge out-of-flatness part, operational sequence is loaded down with trivial details, wayward, consumptive material consumption is large, and operating efficiency is low.In addition the upper surface area unfavorable factor less than normal that has caused mortar specimen due to this kind of stripping means, makes test result true not.
summary of the invention
the present invention is directed to the problems referred to above that prior art exists, a kind of shaping frame and using method thereof for the test of mortar tensile bond strength is provided.
shaping frame for the test of mortar tensile bond strength provided by the present invention comprises opening frame 4, left connection frame 5, upper connection frame 8, bayonet socket frame 6 and pull bar 3; Described shaping frame is square shaping frame, described opening frame 4 is positioned at the below of described square shaping frame, described upper connection frame 8 is positioned at the top of described square shaping frame, and described left connection frame 5 is positioned at the left side of described square shaping frame, and described bayonet socket frame 6 is positioned at the right side of described shaping frame; Between described opening frame 4, left connection frame 5, upper connection frame 8, bayonet socket frame 6, interlink by rotating shaft rivet 1, described pull bar 3 is arranged in described opening frame 4, in described bayonet socket frame 6, be provided with draw-in groove 2, described pull bar 3 is by being fixed and forming described square shaping frame with described draw-in groove 2.
shaping frame using method concrete steps provided by the present invention are as follows:
(1) choosing at the bottom of 10 cement based that prepare is one group;
(2) a little releasing agent is evenly coated in 10 described shaping frames inner sides, described shaping frame is placed in the forming surface of mortar specimen at the bottom of described cement based, alignd with four limits at the bottom of described cement based in four limits of described shaping frame;
(3) the mortar slurry preparing is inserted in described shaping frame, evenly plugged and pounded 15 times with tamper, more real 5 times of artificial top, slowly by 90 ° of integral-rotations, then top is real makes mortar specimen 5 times;
(4) strike off mortar surface with thin blade with 45 ° of directions, leave standstill after 5-10 min, buttress described moulding framework on the other hand, another hand slowly pulls described pull bar 3 to open described opening frame 4 towards horizontal direction laterally;
(5) described opening frame 4 is opened after 90 °, and then outwards rotates successively in the direction of the clock described left connection frame 5 and upper connection frame 8, while departing from described mortar specimen completely, completes the demoulding to All Border;
(6), by the maintenance after 13 days under standard state of described mortar specimen, be arranged on and on electronic universal tester, carry out tensile bond strength test.
mortar specimen is after maintenance finishes, need on test specimen surface, evenly coat high-strength structureal adhesives, upper fixture alignment is placed on mortar shaping test piece, ensure that fixture is not crooked, continue to carry out tensile bond strength test after maintenance 24 h, tensile bond strength test comprises the following steps:
a. the loading speed of electronic universal tester is set to (5 ± 1) mm/min, until test block destroys.Destruction face is inner for valid data and record payload values at mortar, and destruction face is invalid data at adhesive surface.In the time that the valid data in 10 test specimens are greater than or equal to 6, this group result of the test is effective.Otherwise, be invalid result of the test.
B. single test block tensile bond strength is calculated as follows:
In formula, f
atfor mortar tensile bond strength (MPa), F is failing load (N), A
zfor bond area (mm
2).
the arithmetic mean of instantaneous value that final result of the test is all valid data.
the present invention has simple structure, easy to operate, and eliminate the phenomenon that in knockout course in the past, mortar specimen edge is upturned, abandon maintenance and finished rear mortar specimen surface second processing bruting process, save material, improve operating efficiency, ensured the accuracy of test result simultaneously.
Brief description of the drawings
fig. 1 is shaping frame structural representation of the present invention.
fig. 2 is the structural representation of shaping frame opening edge of the present invention in the time opening.
fig. 3 is the structural representation of shaping frame opening frame of the present invention.
fig. 4 is the structural representation that shaping frame of the present invention connects frame.
fig. 5 is the front view of draw-in groove port in Fig. 2.
in figure: 1, rotating shaft rivet, 2, draw-in groove, 3, pull bar, 4, opening frame, 5, left connection frame, 6, bayonet socket frame, 7, rotating shaft circular hole, 8, upper connection frame.
Detailed description of the invention
shaping frame of the present invention is made up of opening frame 4, left connection frame 5, upper connection frame 8 and bayonet socket frame 6, between each frame, interlink by rotating shaft rivet 1, in order to make between frame flexible rotating around the shaft, the rotating shaft link part of frame is all designed to 1/4 circular configuration, shaping frame opening frame 4 is provided with pull bar 3 so that combination and form removal, pull bar 3 by with the bayonet socket frame 6 draw-in grooves 2 squarely shaping frame that is fixed.
adopt said structure, in the time carrying out tensile bond strength test, first shaping frame is fixed into square frame as shown in Figure 1, brushing thin layer releasing agent inside shaping frame, then be placed in the forming surface of substrate cement substrate mortar specimen, the mortar slurry mixing is slowly inserted in shaping frame, plug and pound evenly by test method, top reality is also scraped plane surface, when the demoulding, framework is held up in one have gentle hands, another hand slowly pulls pull bar to open shaping frame opening frame 4 towards horizontal direction laterally, then in the direction of the clock successively outwards the left connection frame 5 of rotational forming frame and upper connection frame 8 until each frame departs from mortar specimen completely, complete the demoulding.
the housing of described shaping frame is of a size of 70mm × 70mm, and inside casing is of a size of 40mm × 40mm, and thickness is 6mm.
described rotating shaft rivet 1 is positioned at the square area central point that adjacent two frames occur simultaneously, the long 6mm of rotating shaft rivet 1, diameter 3mm.
described drawbar height is 10mm, and the degree of depth of draw-in groove is 15mm, and pull bar diameter is corresponding to draw-in groove width.
described each frame intersection rotating part is designed to 1/4 circular configuration.
the material of described shaping frame is metal or RPVC.
the foregoing is only preferred embodiments of the present invention, the scope of the claims of the present invention is not formed to constraint, be equally applicable to the related tensile bond strength test shaping frame such as " glue powder polyphenyl granule exterior wall heat preserving system material " (JG/T 158-2013), " external wall outer insulation engineering code " (JGJ 144-2004) according to technical spirit of the present invention and method.
Claims (3)
1.
for a shaping frame for mortar tensile bond strength test, it is characterized in that this shaping frame comprises opening frame (4), left connection frame (5), upper connection frame (8), bayonet socket frame (6) and pull bar (3); Described shaping frame is square shaping frame, described opening frame (4) is positioned at the below of described square shaping frame, described upper connection frame (8) is positioned at the top of described square shaping frame, described left connection frame (5) is positioned at the left side of described square shaping frame, and described bayonet socket frame (6) is positioned at the right side of described shaping frame; Between described opening frame (4), left connection frame (5), upper connection frame (8), bayonet socket frame (6), interlink by rotating shaft rivet (1), described pull bar (3) is arranged in described opening frame (4), in described bayonet socket frame (6), be provided with draw-in groove (2), described pull bar (3) is by being fixed and forming described square shaping frame with described draw-in groove (2).
2.
shaping frame according to claim 1, the height that it is characterized in that described pull bar (3) is 10mm, and the degree of depth of described draw-in groove (2) is 15mm, and the diameter of described pull bar (3) is corresponding to the width of described draw-in groove (2).
3.
the using method of shaping frame described in claim 1, is characterized in that the method concrete steps are as follows:
(1) choosing at the bottom of 10 cement based that prepare is one group;
(2) a little releasing agent is evenly coated in 10 described shaping frames inner sides, described shaping frame is placed in the forming surface of mortar specimen at the bottom of described cement based, alignd with four limits at the bottom of described cement based in four limits of described shaping frame;
(3) the mortar slurry preparing is inserted in described shaping frame, evenly plugged and pounded 15 times with tamper, more real 5 times of artificial top, slowly by 90 ° of integral-rotations, then top is real makes mortar specimen 5 times;
(4) strike off mortar surface with thin blade with 45 ° of directions, leave standstill after 5-10 min, buttress described moulding framework on the other hand, another hand slowly pulls described pull bar (3) to open described opening frame (4) towards horizontal direction laterally;
(5) described opening frame (4) is opened after 90 °, and then outwards rotates successively in the direction of the clock described left connection frame (5) and upper connection frame (8), while departing from described mortar specimen completely, completes the demoulding to All Border;
(6), by the maintenance after 13 days under standard state of described mortar specimen, be arranged on and on electronic universal tester, carry out tensile bond strength test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410167772.4A CN104044200B (en) | 2014-04-24 | 2014-04-24 | Shaping frame and using method thereof for the test of mortar tensile bond strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410167772.4A CN104044200B (en) | 2014-04-24 | 2014-04-24 | Shaping frame and using method thereof for the test of mortar tensile bond strength |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104044200A true CN104044200A (en) | 2014-09-17 |
| CN104044200B CN104044200B (en) | 2016-10-05 |
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| CN201410167772.4A Active CN104044200B (en) | 2014-04-24 | 2014-04-24 | Shaping frame and using method thereof for the test of mortar tensile bond strength |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106525572A (en) * | 2016-12-09 | 2017-03-22 | 张家港市利奇塑料有限公司 | Self-adhesive test fixture |
| CN107132099A (en) * | 2017-07-11 | 2017-09-05 | 华南理工大学 | A kind of mortar tensile bond strength shaping frame structure-improved and its forming method |
| CN107192592A (en) * | 2017-07-11 | 2017-09-22 | 华南理工大学 | A kind of shaping frame and its forming method tested for mortar tensile bond strength |
| CN107186863A (en) * | 2017-07-11 | 2017-09-22 | 华南理工大学 | It is a kind of to improve the mould for making mortar bonding tensile test specimen efficiency |
| CN109269890A (en) * | 2018-10-23 | 2019-01-25 | 北京金隅砂浆有限公司 | A kind of outer heat preservation system float coat crack resistance (flexibility) test method |
| CN111024502A (en) * | 2019-12-27 | 2020-04-17 | 南通市建筑科学研究院有限公司 | Detection method for tensile property of anti-crack mortar in inorganic lightweight aggregate heat insulation system |
| CN111044449A (en) * | 2019-12-04 | 2020-04-21 | 河海大学 | Controllable forming device for binding material |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106525572A (en) * | 2016-12-09 | 2017-03-22 | 张家港市利奇塑料有限公司 | Self-adhesive test fixture |
| CN107132099A (en) * | 2017-07-11 | 2017-09-05 | 华南理工大学 | A kind of mortar tensile bond strength shaping frame structure-improved and its forming method |
| CN107192592A (en) * | 2017-07-11 | 2017-09-22 | 华南理工大学 | A kind of shaping frame and its forming method tested for mortar tensile bond strength |
| CN107186863A (en) * | 2017-07-11 | 2017-09-22 | 华南理工大学 | It is a kind of to improve the mould for making mortar bonding tensile test specimen efficiency |
| CN107186863B (en) * | 2017-07-11 | 2023-06-16 | 华南理工大学 | Mould for improving efficiency of manufacturing mortar bonding tensile test piece |
| CN107192592B (en) * | 2017-07-11 | 2023-11-17 | 华南理工大学 | Forming frame for mortar tensile bonding strength test and forming method thereof |
| CN107132099B (en) * | 2017-07-11 | 2023-11-17 | 华南理工大学 | Improved structure of mortar tensile bonding strength molding frame and molding method thereof |
| CN109269890A (en) * | 2018-10-23 | 2019-01-25 | 北京金隅砂浆有限公司 | A kind of outer heat preservation system float coat crack resistance (flexibility) test method |
| CN109269890B (en) * | 2018-10-23 | 2023-08-04 | 北京金隅砂浆有限公司 | Method for testing crack resistance of plastering layer of external heat insulation system |
| CN111044449A (en) * | 2019-12-04 | 2020-04-21 | 河海大学 | Controllable forming device for binding material |
| CN111024502A (en) * | 2019-12-27 | 2020-04-17 | 南通市建筑科学研究院有限公司 | Detection method for tensile property of anti-crack mortar in inorganic lightweight aggregate heat insulation system |
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| Publication number | Publication date |
|---|---|
| CN104044200B (en) | 2016-10-05 |
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