CN211426022U - Auxiliary device for molding alkali aggregate reaction mortar test piece - Google Patents
Auxiliary device for molding alkali aggregate reaction mortar test piece Download PDFInfo
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- CN211426022U CN211426022U CN201922369257.5U CN201922369257U CN211426022U CN 211426022 U CN211426022 U CN 211426022U CN 201922369257 U CN201922369257 U CN 201922369257U CN 211426022 U CN211426022 U CN 211426022U
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Abstract
The utility model discloses an auxiliary device for molding an alkali aggregate reaction mortar test piece, which comprises a die sleeve, a large material sowing device and a small material sowing device; the die sleeve is used for being placed above the test die, a plurality of through grooves are formed in the die sleeve, and the through grooves are matched with the die grooves in the corresponding test die one by one; big broadcast glassware, small broadcast glassware all include the bulge that can insert logical inslot, the length of the bulge of big broadcast glassware is greater than the length of the bulge of small broadcast glassware. The utility model aims at providing an alkali reaction mortar test piece auxiliary device for shaping that gathers materials to there is inhomogeneous, the nonstandard problem of sample when solving to lack special broadcast glassware among the prior art and leading to the test piece shaping, realize improving work efficiency, reduce the purpose of experimental error.
Description
Technical Field
The utility model relates to a building engineering material detection area, concretely relates to alkali reaction mortar test piece auxiliary device for shaping that gathers materials.
Background
With the high importance of the quality and safety of construction engineering in recent years, all entrance materials, construction parts and the like are subjected to witness sampling detection. The alkali-aggregate reaction detection of the aggregate is required for important structural parts, the aggregate which is easy to generate the alkali-aggregate reaction is avoided, and the long-term performance and durability safety of the structure are guaranteed.
According to the existing standards GB/T14684-2011, GB/T14685-2011 and JGJ52-2006, when an alkali aggregate test piece is formed, mortar which is uniformly stirred is loaded into a test mold in two layers, each layer is tamped for 40 times, and the size of the used test mold is (25 multiplied by 280) mm. However, no auxiliary device for forming the alkali aggregate reaction mortar test piece exists in the market at present, so that three problems exist when each detection center forms the alkali aggregate reaction mortar test piece: (1) because there is not special broadcast glassware, lead to accomplishing the even equivalent sample of two-layer mortar completely when the test piece shaping, every layer of sample how much all relies on the testing personnel experience, it is well known that under the same tamping work effect, closely knit degree is different after the different thickness samples are tamped to lead to the mortar test piece after the shaping inhomogeneous, influence the testing result accuracy, every layer of sample volume is all inequality when the shaping of different testing personnel, is unfavorable for the reappearance of experimental result. (2) Due to the lack of a special feeder and a die sleeve, the problems of inconvenient operation and low efficiency exist when the test piece is prepared. (3) Due to the lack of the special die sleeve, when the traditional forming method is adopted, due to the lack of the die sleeve, after the second layer of mortar is filled, due to the fact that the second layer of mortar is tamped by the tamping rod, the height of the mortar layer is lower than the depth of a test die, and the mortar layer needs to be supplemented again, so that the situation that two layers of mortar are formed in different layers according to the same standard requirement appears.
Therefore it is necessary to study an alkali aggregate reaction mortar test piece forming auxiliary device which can be used on a mortar vibration table in a matched manner, so that the working efficiency is improved, the experimental error is reduced, and the problems of uneven and irregular sampling caused by lack of a special material sowing device during test piece forming at present can be solved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an alkali reaction mortar test piece auxiliary device for shaping that gathers materials to there is inhomogeneous, the nonstandard problem of sample when solving to lack special broadcast glassware among the prior art and leading to the test piece shaping, realize improving work efficiency, reduce the purpose of experimental error.
The utility model discloses a following technical scheme realizes:
an auxiliary device for molding an alkali aggregate reaction mortar test piece comprises a die sleeve, a large feeder and a small feeder; the die sleeve is used for being placed above the test die, a plurality of through grooves are formed in the die sleeve, and the through grooves are matched with the die grooves in the corresponding test die one by one; big broadcast glassware, small broadcast glassware all include the bulge that can insert logical inslot, the length of the bulge of big broadcast glassware is greater than the length of the bulge of small broadcast glassware.
To lack among the prior art special use and broadcast the glassware and lead to the problem that the sample is inhomogeneous, not normal when the test piece shaping, the utility model provides an alkali reaction mortar auxiliary device for test piece shaping that gathers materials, the examination mould has a plurality of die cavities on for prior art. The utility model discloses set up the die sleeve that matches with examination mould, set up a plurality of logical grooves on the die sleeve, lead to the die cavity one-to-one on groove and the examination mould that corresponds, be promptly when the die sleeve is placed in examination mould top, lead to the groove and be relative one by one with the die cavity for every leads to groove and respectively communicates with a die cavity. Big spreading glassware, dibbler all including can insert the bulge that leads to the inslot, and the material is broadcast when big spreading glassware is used for adding the first layer mortar, and the material is broadcast when dibbler is used for adding the second floor mortar, inserts corresponding logical inslot through respective bulge to the material is broadcast to the mortar in the die cavity. For the large spreader and the small spreader, the length of the respective protruding part is fixed, so that the length of the protruding part extending into the through groove is fixed, and the initial thicknesses of the first layer of mortar and the second layer of mortar can be controlled according to the detection standard. Specifically, the length of the respective protruding part of the large feeder and the small feeder is adaptively set according to the requirement of the used detection standard on the initial thickness of the first layer mortar and the second layer mortar, which can be realized by the technical personnel in the field, and the premise that the length of the protruding part of the large feeder is larger than that of the protruding part of the small feeder is required to be satisfied. In this application, the effect of die sleeve is that the during operation provides the location respectively for broadcasting glassware greatly, the dibbler for a short time, and is preferred, broadcasts glassware greatly, dibbler for a short time only the bulge can extend to logical inslot, and remaining part can't get into logical groove.
Further, when the die sleeve is placed above the test die, the through grooves are opposite to the die grooves on the test die one by one. And mortar can be added into the corresponding die cavity through each through groove.
Furthermore, two adjacent through grooves are separated by a division bar. The division bar can be detachably connected with the die sleeve body and can also be a part of the die sleeve.
Furthermore, a connecting piece is arranged on the outer side of the die sleeve, and a mounting hole is formed in the connecting piece. The connecting piece is used for being connected with the compaction table and is connected with the compaction table in a matched mode through the mounting hole in the connecting piece.
Preferably, the mounting hole is a threaded hole and is connected with the tapping platform through a bolt.
Furthermore, the outer side of the die sleeve is also fixed with a nut, and the die sleeve also comprises a jacking screw matched with the nut. The jacking screw rod is used for being abutted to the edge of the shell of the jolt ramming table, so that the stability of the die sleeve is improved.
Preferably, the fixing nut and the connecting piece are respectively positioned at two opposite sides of the die sleeve.
Furthermore, the large feeder and the small feeder are both in a convex plate-shaped structure. The convex part is the convex part of the convex structure.
Further, the width of the protruding portion is equal to the width of the through groove. Ensure that the large and small feeders can enter the through groove just.
The test piece forming method comprises the following steps:
s1, preparing sand samples of various grades according to specified detection standards, and preparing mortar according to a standard given proportion;
s2, preparing a compaction table, and mounting a test mold and a mold sleeve on the compaction table, so that the test mold is placed below the mold sleeve, and the mold sleeve is in full contact with the test mold; filling an expansion measuring head into the test mold;
s3, filling a first layer of mortar: adding the uniformly stirred mortar into the die cavity corresponding to the test die from each through groove of the die sleeve according to the design amount, vertically erecting the mortar on the top of the die sleeve by using a large feeder, and pushing the material layer to be flat along each die cavity back and forth once;
s4, filling second-layer mortar: and adding the uniformly stirred mortar into the die cavity corresponding to the test die from each through groove of the die sleeve according to the design amount, vertically erecting a small seeding device at the top of the die sleeve, and pushing the material layer to be flat along each die cavity back and forth once.
Further, after the material layer is pushed flat in steps S3 and S4, each layer is tamped by a tamping rod for a specified number of times to obtain a mortar layer with a required thickness.
Further, the method also comprises the following steps:
s5, removing the die sleeve, taking down the test die from the compaction table, using a metal ruler which is the same as the test piece in forming, erecting at one end of the top of the test die in a vertical state, then slowly moving to the other end along the length direction of the test die in a transverse sawing action, scraping off mortar exceeding the test die part at one time, and using the same metal ruler to trowel the surface of the test piece in a horizontal state;
s6, placing the strip mold into a standard curing box, curing for a specified time, demolding, and immediately measuring the initial length of the test piece; and then, measuring the length of the benchmark and each age according to the requirement of the detection standard.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
1. the utility model relates to an alkali reaction mortar test piece auxiliary device for shaping that gathers materials can use with the existing cement mortar plain bumper of each detection center is supporting for the shaping of alkali reaction mortar test piece that gathers materials. Can show improvement work efficiency, reduce the experiment error, also can solve present because lack special broadcast glassware and lead to the test piece when shaping to have the sample inhomogeneous, problem irregular.
2. The utility model relates to an alkali aggregate reaction mortar test piece auxiliary device for shaping has overcome among the prior art that each detection center can not accomplish the even equivalent sample of two-layer mortar completely when the test piece shaping, how much all rely on the measurement personnel experience for every layer of sample, and the mortar test piece compactness after leading to the shaping is inhomogeneous, influences the testing result accuracy, and every layer of sample volume is all inequality when the shaping of different measurement personnel simultaneously, is unfavorable for the reappearance of experimental result. Simultaneously through using this application, also can solve because lack professional equipment, lead to having the inconvenient problem of operation, test piece shaping inefficiency when carrying out the test piece preparation.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a schematic structural diagram of a test mold according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a die case according to an embodiment of the present invention;
FIG. 3 is a front view of a die case according to an embodiment of the present invention;
FIG. 4 is a front view of a large feeder according to an embodiment of the present invention;
fig. 5 is a front view of the small seeder according to the embodiment of the present invention.
Reference numbers and corresponding part names in the drawings:
1-die sleeve, 2-large spreader, 3-small spreader, 4-through groove, 5-bulge, 6-parting bead, 7-connecting piece, 8-mounting hole, 9-nut, 10-tightening screw.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
Example 1:
an auxiliary device for molding an alkali aggregate reaction mortar test piece comprises a die sleeve 1, a large feeder 2 and a small feeder 3; the die sleeve 1 is used for being placed above a test die, a plurality of through grooves 4 are formed in the die sleeve 1, and the through grooves 4 are matched with die grooves in the corresponding test die one by one; big glassware 2, little glassware 3 all include can insert the bulge 5 in leading to the groove 4, the length of bulge 5 of big glassware 2 is greater than the length of bulge 5 of little glassware 3. When the die sleeve 1 is placed above the test die, the through grooves 4 are opposite to the die grooves on the test die one by one.
Fig. 1 shows a structure of a conventional test mold, and fig. 2 and 3 show templates of two structures, respectively.
Example 2:
as shown in fig. 1 to 5, in the auxiliary device for molding a test piece of alkali-aggregate reaction mortar, on the basis of embodiment 1, two adjacent through grooves 4 are separated by a partition bar 6. And a connecting piece 7 is arranged on the outer side of the die sleeve 1, and a mounting hole 8 is formed in the connecting piece 7. The outer side of the die sleeve 1 is also fixed with a nut 9, and the die sleeve further comprises a jacking screw 10 matched with the nut 9. The large feeder 2 and the small feeder 3 are both in a convex plate-shaped structure. The width of the protrusion 5 is equal to the width of the through slot 4.
The die sleeve structure in this embodiment is as shown in fig. 2 or fig. 3, and is 310mm long, 100mm wide, and 35mm high (because cement mortar tries about 60mm high, and alkali aggregate reaction tries about 45mm high, under the condition that does not change current cement mortar plain bumper spliced pole, needs to increase the die sleeve height to 35mm), and the die sleeve outside should set up round rubber seal to die sleeve and trying the mould are sealed intact. The through grooves of the die sleeve are completely overlapped with the die grooves of the test die, when the die sleeve is seen from top to bottom, the wall of the die sleeve and the interior of the die are completely overlapped, and the distance between the wall of the die sleeve and the interior of the die is not more than 0.5 mm.
The large spreader is shown in fig. 4 and has a thickness of about 2 mm. The small spreader is shown in fig. 5 and has a thickness of about 1 mm. Wherein, the big feeder and the small feeder have the same shape and size except that the length of the convex part is different. When the convex parts of the large and small feeders are inserted into the through grooves, the upper body parts of the large and small feeders are propped against the upper surface of the die sleeve.
In this embodiment, through will trying the mould and arrange below the die sleeve, adjust die sleeve and try mould distance, make die sleeve and try mould abundant contact, play the effect of fixed examination mould. When the mortar is used, the large spreader is vertically erected at the top of the die sleeve, the material layer is spread flatly along each die groove in a back-and-forth mode, a mortar layer with the initial thickness controlled to be 17-18 mm can be obtained, and a first mortar layer with the thickness controlled to be 12-13 mm can be obtained after each layer of the mortar is tamped for 40 times by the tamping rod. And after the second layer of mortar is filled, obtaining a mortar layer with the initial thickness controlled to be 17-18 mm by using a small feeder according to the same operation method as the large feeder, and tamping each layer by using a tamping rod for 40 times to obtain the second layer of mortar layer with the thickness controlled to be 12-13 mm.
The specific use steps of this embodiment are:
(a) adjusting the temperature of a laboratory to 20 +/-2 ℃, adjusting the relative humidity to be not less than 50%, preparing sand samples of various particle sizes according to the detection standard specified by a customer, such as GB/T14684-2011, and preparing mortar according to the standard given proportion.
(b) In the mortar preparation process, the common cement mortar test piece forming die sleeve on the cement mortar jolt ramming table is replaced, the die sleeve is installed, the test die is arranged below the die sleeve, the fastening bolt is rotated, the distance between the die sleeve and the test die is adjusted, and the die sleeve is in full contact with the test die.
(c) The mortar which is uniformly stirred according to the standard is directly loaded into a test mould which is provided with an expansion measuring head from a stirring pot in two layers by using a spoon, about 235g of mortar is placed in each groove when the first layer is loaded, a large-scale feed device is vertically erected at the top of a mould sleeve, the material layer is spread out along each mould groove back and forth once, the mortar layer with the initial thickness controlled to be 17-18 mm can be obtained, and the first mortar layer with the thickness controlled to be 12-13 mm can be obtained after each layer of the mortar layer is tamped for 40 times by using a tamping rod. Care should be taken to tamp the circumference of the expansion probe.
(d) And then a second layer of mortar is loaded, a small feeder is used for obtaining a mortar layer with the initial thickness controlled to be 17-18 mm according to the same operation method as the large feeder, and a second layer of mortar layer with the thickness controlled to be 12-13 mm can be obtained after each layer of mortar is tamped for 40 times by a tamping rod.
(e) And removing the die sleeve, taking down the test die from the plain bumper, using a metal straight ruler which is the same as the cement mortar test piece in forming, erecting at one end of the top of the test die at an angle of approximately 90 degrees, then slowly moving towards the other end along the length direction of the test die by a transverse sawing action, scraping off the mortar exceeding the test die part at one time, and using the same metal straight ruler to trowel the surface of the test piece in an approximately horizontal state.
(f) And after the test piece is molded, immediately placing the test piece with a mold into a standard curing box, curing for 24 +/-2 hours, demolding, and immediately measuring the initial length of the test piece. And then, measuring the length of the benchmark and each age according to the requirement of the detection standard.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. An auxiliary device for molding an alkali aggregate reaction mortar test piece is characterized by comprising a die sleeve (1), a large feeder (2) and a small feeder (3); the die sleeve (1) is used for being placed above the test die, a plurality of through grooves (4) are formed in the die sleeve (1), and the through grooves (4) are matched with die grooves in the corresponding test die one by one; big broadcast glassware (2), little broadcast glassware (3) all include bulge (5) that can insert logical groove (4), the length of bulge (5) of big broadcast glassware (2) is greater than the length of bulge (5) of little broadcast glassware (3).
2. The auxiliary device for molding the alkali-aggregate reaction mortar test piece according to claim 1, wherein the through grooves (4) are opposite to the die grooves on the test die one by one when the die sleeve (1) is placed above the test die.
3. The auxiliary device for molding the alkali-aggregate reaction mortar test piece according to claim 1, wherein two adjacent through grooves (4) are separated by a spacer (6).
4. The auxiliary device for molding the alkali-aggregate reaction mortar test piece according to claim 1, wherein a connecting piece (7) is arranged outside the die sleeve (1), and the connecting piece (7) is provided with a mounting hole (8).
5. The auxiliary device for molding the alkali-aggregate reaction mortar test piece according to claim 1, wherein a nut (9) is further fixed on the outer side of the die sleeve (1), and the auxiliary device further comprises a jacking screw rod (10) matched with the nut (9).
6. The auxiliary device for molding the alkali-aggregate reaction mortar test piece according to claim 1, wherein the large spreading device (2) and the small spreading device (3) are both in a plate-shaped structure in a shape like a Chinese character 'tu'.
7. An auxiliary device for molding alkali-aggregate reaction mortar test pieces according to claim 1, wherein the width of the bulge (5) is equal to the width of the through groove (4).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110987566A (en) * | 2019-12-25 | 2020-04-10 | 四川中核艾瑞特工程检测有限公司 | Auxiliary assembly for molding alkali aggregate reaction mortar test piece and test piece molding method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110987566A (en) * | 2019-12-25 | 2020-04-10 | 四川中核艾瑞特工程检测有限公司 | Auxiliary assembly for molding alkali aggregate reaction mortar test piece and test piece molding method |
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