CN111175210B - Method for rapidly sealing mortar impervious test piece - Google Patents
Method for rapidly sealing mortar impervious test piece Download PDFInfo
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- CN111175210B CN111175210B CN201911411571.3A CN201911411571A CN111175210B CN 111175210 B CN111175210 B CN 111175210B CN 201911411571 A CN201911411571 A CN 201911411571A CN 111175210 B CN111175210 B CN 111175210B
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- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 98
- 238000007789 sealing Methods 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000011248 coating agent Substances 0.000 claims abstract description 11
- 238000000576 coating method Methods 0.000 claims abstract description 11
- 238000004804 winding Methods 0.000 claims abstract description 8
- 230000001174 ascending effect Effects 0.000 claims abstract description 4
- 239000012188 paraffin wax Substances 0.000 claims description 18
- 230000007246 mechanism Effects 0.000 claims description 13
- 230000008093 supporting effect Effects 0.000 claims description 12
- 230000003487 anti-permeability effect Effects 0.000 claims description 11
- 230000000712 assembly Effects 0.000 claims description 5
- 238000000429 assembly Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000000926 separation method Methods 0.000 claims 1
- 238000009423 ventilation Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 6
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 4
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 4
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 125000003003 spiro group Chemical group 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/0806—Details, e.g. sample holders, mounting samples for testing
-
- 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
- G01N1/36—Embedding or analogous mounting of samples
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
-
- 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
- G01N1/36—Embedding or analogous mounting of samples
- G01N2001/362—Embedding or analogous mounting of samples using continuous plastic film to mount sample
-
- 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
- G01N1/36—Embedding or analogous mounting of samples
- G01N2001/366—Moulds; Demoulding
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Dispersion Chemistry (AREA)
- Fluid Mechanics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a method for rapidly sealing a mortar impervious test piece, which comprises the following steps: step one, wiping a cured mortar impervious test piece clean and airing: winding the elastic film strips on the bottom and the top of the side wall of the mortar anti-seepage test piece respectively to form graded sealing, wherein the distance between the elastic film strips on the bottom of the side wall of the mortar anti-seepage test piece and the bottom surface of the mortar anti-seepage test piece is 10mm, and the distance between the elastic film strips on the top of the side wall of the mortar anti-seepage test piece and the top surface of the mortar anti-seepage test piece is 10mm; and thirdly, pressing the mortar anti-seepage test piece into the anti-seepage test mold so that the elastic film belt blocks the water flow ascending path between the sealing test piece and the side wall of the anti-seepage test mold. The invention solves the problem that the sealing coating is not easy to uniformly coat in the prior art by using the elastic film strip sealing mortar anti-seepage test piece.
Description
Technical Field
The invention relates to the field of mortar performance detection. More particularly, the invention relates to a method for rapidly sealing a mortar impervious test piece.
Background
The anti-seepage performance of the mortar is an important index for evaluating the durability of the mortar, and is obtained through a mortar anti-seepage test, and the test is determined according to JGJ/T70-2009 of basic performance test method of building mortar.
The test method for the mortar impermeability specified by JGJ/T70-2009 is to install a group of tested mortar impermeability test pieces on a special mortar impermeability instrument after being filled into a test piece sleeve, and to pressurize water on the bottom surface of the test piece according to the specified method during the test, and to obtain the impermeability grade of the tested mortar impermeability test piece according to the observed surface leakage condition and internal penetration condition of the whole group of test pieces and the applied water pressure. The test of the impermeability of the mortar used at present adopts a truncated cone test piece with the inner diameter of an upper opening of 70mm, the inner diameter of a lower opening of 80mm and the height of 30 mm. In the experimental process, water is not allowed to permeate between the test piece and the test die, namely peripheral leakage occurs, otherwise, the experimental result is invalid. Thus sealing between the test piece and the test pattern. The sealing method generally adopted at present is as follows: "coating a layer of melted paraffin with a small amount of rosin in the side of the test piece. And then the test piece is pressed into a test mold preheated by an oven or an electric furnace by using a screw pressurizer, so that the test piece is level with the bottom of the test mold, and the pressure is relieved after the test mold is cooled. The preheating temperature of the test mold should be determined by contacting paraffin wax with the test mold, i.e. slowly melting, but not flowing. However, this sealing method has a problem that sealing coating of rosin, paraffin, and the like is not uniform, so that leakage occurs during the test to stop the test.
Disclosure of Invention
It is an object of the present invention to solve at least the above problems and to provide at least the advantages to be described later.
It is still another object of the present invention to provide a method for rapidly sealing a mortar permeation resistant test piece which overcomes the problem of the prior art that the sealing coating is not easily uniformly coated by using an elastic film tape to seal the mortar permeation resistant test piece.
To achieve these objects and other advantages and in accordance with the purpose of the invention, a method for rapidly sealing a mortar anti-seepage test piece is provided, comprising the steps of:
step one, wiping a cured mortar impervious test piece clean and airing:
winding the elastic film strips on the bottom and the top of the side wall of the mortar anti-seepage test piece respectively to form graded sealing, wherein the distance between the elastic film strips on the bottom of the side wall of the mortar anti-seepage test piece and the bottom surface of the mortar anti-seepage test piece is 10mm, and the distance between the elastic film strips on the top of the side wall of the mortar anti-seepage test piece and the top surface of the mortar anti-seepage test piece is 10mm;
and thirdly, pressing the mortar anti-seepage test piece into the anti-seepage test mold so that the elastic film belt blocks the water flow ascending path between the sealing test piece and the side wall of the anti-seepage test mold.
Preferably, the elastic film tape is polytetrafluoroethylene tape.
Preferably, the elastic film strip is wrapped four times around the bottom and top of the sidewall of the anti-seepage mortar test piece, respectively.
Preferably, in the second step, before the elastic film strip is wound on the mortar impervious test piece, the elastic film strip is firstly treated, and the treatment method comprises the following steps: and (3) expanding the elastic film belt, coating paraffin on the elastic film belt, heating until the paraffin is melted, and finally winding one surface of the elastic film coated with the paraffin on the mortar impervious test piece.
Preferably, in the third step, the anti-seepage test mold includes:
a test piece sleeve which is of a cylindrical structure;
the two sets of sleeve sealing mechanisms, the interval is sunken about test piece telescopic inside wall forms two annular constant head tanks, the constant head tank with test piece sleeve coaxial setting, two sets of sleeve sealing mechanisms and two constant head tank one-to-one set up, sleeve sealing mechanism including the card locate the inflation body of constant head tank notch, two all with the regulating mouth of constant head tank bottom intercommunication, and locate in the draw-in groove and with the clamp of coaxial setting of constant head tank, the surface of inflation body with test piece telescopic inside wall flushes, two regulating mouthfuls are followed test piece telescopic axis symmetry sets up, the clamp includes that two central angles are 155 ° -175's cardboard, the radius of cardboard is slightly greater than test piece telescopic internal diameter, the both ends of cardboard all have and are equipped with the locating plate, and two locating plate one-to-ones pass two regulating mouths and stretch out outside the test piece sleeve, two locating plate spiro union of same regulating mouth department, wherein, the vertical length of cardboard is less than constant head tank notch width.
Preferably, annular stop blocks are respectively arranged on the upper side wall and the lower side wall of the positioning groove, the stop blocks are coaxially arranged with the positioning groove, the clamping plate is positioned between the two stop blocks, and the stop blocks are in contact with the expansion body;
the expansion body is hollow structure, the expansion body is located one side in the constant head tank is equipped with two sets of subassembly that admit air, and two sets of subassembly that admit air and two dog one-to-one settings, the subassembly that admit air includes that a plurality of intervals are located the air inlet on the expansion body, the intercommunication has the intake pipe on the air inlet, the free end of intake pipe passes in proper order the dog the bottom of constant head tank stretches out outside the test piece sleeve, wherein, in the same set of subassembly that admit air, a plurality of air inlets are followed the axis circumference equidistant setting of expansion body.
Preferably, the device further comprises a supporting component, wherein the supporting component comprises through holes arranged at the bottom of the positioning groove at intervals, positioning rods are slidably arranged in the through holes, one ends of the positioning rods are positioned in the positioning groove, supporting blocks are arranged at the ends of the positioning rods, the other ends of the positioning rods are positioned outside the test piece sleeve, fixing plates are arranged at the ends of the positioning rods, and the fixing plates are in threaded connection with the test piece sleeve.
Preferably, in the same sleeve sealing mechanism, two first springs are symmetrically arranged at the bottom of the positioning groove along the central axis of the positioning groove, the two first springs are in one-to-one correspondence with the two clamping pieces, the lengths of the first springs from the two adjusting openings are equal, the free ends of the first springs are fixedly connected with the corresponding clamping plates, when the two clamping plates are fixedly connected, the first springs are in a stretching state, and when the two clamping plates are separated, the first springs are in a natural stretching state.
Preferably, the same adjusting port is arranged, the two positioning plates are provided with positioning holes, the two positioning holes are connected through a screw, one end of the screw is provided with a limiting block, the other end of the screw is provided with a nut matched with the screw so as to realize the screw connection of the two positioning plates, the screw is sleeved with a second spring, and the second spring is positioned between the two positioning plates.
Preferably, the test piece sleeve bottom coaxial is equipped with annular connecting plate, connecting plate and the base spiro union of impervious appearance, the interval is equipped with a plurality of annular sealing blocks on the top surface of impervious appearance base, sealing block with the coaxial setting of base, a plurality of annular grooves that connecting plate bottom surface interval is sunken to form, the recess with the coaxial setting of connecting plate, a plurality of recesses and a plurality of sealing block one-to-one set up so that the recess holds sealing block, wherein, the recess is covered and is equipped with first sealing washer, the sealing block is covered and is equipped with the second sealing washer.
The invention at least comprises the following beneficial effects:
according to the sealing method for the mortar water seepage-resistant test piece, the elastic film strip is used for sealing the mortar seepage-resistant test piece, so that the problem that a sealing coating is not easy to uniformly coat in the prior art is solved, and the energy consumption and the sealing material cost are saved.
And secondly, the elastic film strips are combined with paraffin for use, so that the problem of uneven paraffin coating in the prior art can be solved, and water seepage between the elastic film strips on two sides can be reduced.
Thirdly, the sealing of the mortar anti-seepage test piece can be realized by arranging the expansion body and the sleeve sealing mechanism, so that water seepage between the test piece sleeve and the mortar anti-seepage test piece in the test process is reduced.
Fourthly, through fixing two clamping plates, the clamping plates are used for abutting the expansion body to be attached to the mortar anti-seepage test piece, gaps between the mortar anti-seepage test piece and the test piece sleeve are reduced, the mortar anti-seepage test piece is pressed into the test piece sleeve in the prior art and then is sealed by means of paraffin or rosin, and the sealing effect is better.
Fifth, on the one hand can promote the contact of the impervious test piece of inflation body and mortar through aerifing in the inflation body, on the other hand can avoid the inflation body to the tank bottom expansion of locating slot through setting up the dog, improve the laminating of inflation body and impervious test piece of mortar, improve the leakproofness of test piece sleeve and impervious test piece of mortar.
Sixthly, supporting the clamping plate through the supporting component; the clamping plate is driven to move after the test is finished by arranging the first spring, so that the mortar anti-seepage test piece is conveniently taken out; the two positioning plates at the same adjusting port are fixed; the sealing block and the groove are arranged to reduce water seepage on the joint of the connecting plate and the base of the impermeability instrument.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic structural view of an anti-seepage test mold according to one embodiment of the present invention;
FIG. 2 is an enlarged view of A in FIG. 1;
FIG. 3 is a schematic structural view of an anti-seepage test mold according to one embodiment of the present invention;
FIG. 4 is a schematic structural view of an anti-seepage test mold according to one embodiment of the present invention.
Detailed Description
The present invention is described in further detail below with reference to examples to enable those skilled in the art to practice the same by referring to the description.
The invention provides a method for rapidly sealing a mortar impervious test piece, which comprises the following steps:
step one, placing the mortar anti-permeability test piece in a standard curing room for curing until a specified age after demolding, taking out the mortar anti-permeability test piece, wiping cleanly, and airing the surface of the mortar test piece:
winding the elastic film strips on the bottom and the top of the side wall of the mortar anti-seepage test piece respectively to form graded sealing, wherein the distance between the elastic film strips on the bottom of the side wall of the mortar anti-seepage test piece and the bottom surface of the mortar anti-seepage test piece is 10mm, the distance between the elastic film strips on the top of the side wall of the mortar anti-seepage test piece and the top surface of the mortar anti-seepage test piece is 10mm, and winding for 3-5 circles;
and thirdly, pressing the mortar anti-seepage test piece into an anti-seepage test mold by using a press machine so that the elastic film belt blocks the water flow ascending path between the sealing test piece and the side wall of the anti-seepage test mold, and placing the elastic film belt on an anti-seepage instrument to perform an anti-seepage test according to the method of JGJ/T70-2009 of basic performance test method of building mortar.
In the technical scheme, the mortar impervious test piece sealed by the method has good sealing effect in the circumferential direction of the mortar impervious test piece without water seepage in the test process. By adopting the technical scheme, the sealing method for the mortar water seepage-resistant test piece provided by the invention uses the elastic film tape to seal the mortar seepage-resistant test piece, thereby overcoming the problem that the sealing coating is not easy to uniformly coat in the prior art and saving the energy consumption and the cost of sealing materials.
In another embodiment, the elastic membrane tape is polytetrafluoroethylene tape. By adopting the technical scheme, the sealing effect of the mortar anti-seepage test piece is good.
In another technical scheme, the elastic film strip is respectively wound on the bottom and the top of the side wall of the anti-seepage mortar test piece for four circles. By adopting the technical scheme, the mortar impervious test piece is easy to be pressed into the impervious test die, and the sealing effect is good.
In another technical scheme, in the second step, before the elastic film strip is wound on the mortar impervious test piece, the elastic film strip is firstly treated, and the treatment method comprises the following steps: and (3) expanding the elastic film belt, coating paraffin on the elastic film belt, heating until the paraffin is melted, and finally winding one surface of the elastic film coated with the paraffin on the mortar impervious test piece. By adopting the technical scheme, the elastic film strips and the paraffin are combined for use, so that the problem of uneven paraffin coating in the prior art can be solved, and water seepage between the elastic film strips on two sides can be avoided.
In another technical solution, as shown in fig. 1-4, in the third step, the impermeability test mold includes:
a test piece sleeve 1 having a cylindrical structure (the test piece sleeve 1 has a certain thickness);
the two sets of sleeve sealing mechanisms are arranged coaxially with the test piece sleeve 1, the sleeve sealing mechanisms comprise an expansion body 301 clamped at the notch of the test piece sleeve 401, two regulating ports 405 communicated with the bottom of the test piece sleeve 401, and a clamp arranged in the clamping groove and coaxially arranged with the positioning groove 401, the surface of the expansion body 301 is flush with the inner side wall of the test piece sleeve 1 so as to press the mortar anti-permeability test piece into the test piece sleeve 1, the two regulating ports 405 are symmetrically arranged along the central axis of the test piece sleeve 1, the clamp comprises two clamping plates 402 with the central angles of 155-175 degrees, the radius of the clamping plate 402 is slightly larger than the inner diameter of the test piece sleeve 1, two ends of the clamping plate 402 are respectively provided with a positioning plate 403, the two positioning plates 403 penetrate through the two adjusting ports 405 in a one-to-one correspondence manner and extend out of the test piece sleeve 1, the two positioning plates 403 at the same adjusting port 405 are in threaded connection so as to fix the two clamping plates 402, wherein the vertical length of the clamping plate 402 is smaller than the width of the notch of the positioning groove 401, in the technical scheme, the expansion body 301 can be made of elastic rubber materials, the two positioning plates 403 at the same adjusting port 405 are separated before the mortar anti-permeability test piece is pressed into the test piece sleeve 1, in the use process, the two positioning plates 403 at the same adjusting port 405 are fixed after the mortar anti-permeability test piece is pressed into the test piece sleeve 1, at the moment, the clamping plate 402 is used for abutting the expansion body 301 to the elastic film strip through the effect of the clamping plate 402, the elastic film strip is pressed to fix the test piece sleeve 1 to the impermeability instrument, and almost no water seeps out from between the mortar impermeability test piece and the test piece sleeve 1 in the test process. By adopting the technical scheme, the invention can realize the sealing of the mortar anti-seepage test piece by arranging the expansion body 301 and the sleeve sealing mechanism, and water seepage between the test piece sleeve 1 and the mortar anti-seepage test piece in the test process is avoided; by fixing the two clamping plates 402, the expansion body 301 is abutted by the clamping plates 402 to be attached to the mortar anti-seepage test piece, so that gaps between the mortar anti-seepage test piece and the test piece sleeve 1 are reduced, the mortar anti-seepage test piece is pressed into the test piece sleeve 1 in the prior art and then is sealed by means of paraffin or rosin, and the sealing effect is better.
In another technical scheme, annular stop blocks 303 are respectively arranged on the upper side wall and the lower side wall of the positioning groove 401, the stop blocks 303 are coaxially arranged with the positioning groove 401, the clamping plate 402 is positioned between the two stop blocks 303, and the stop blocks 303 are contacted with the expansion body 301;
the expansion body 301 is of a hollow structure, two groups of air inlet assemblies are arranged on one side of the expansion body 301, which is located in the positioning groove 401, and are in one-to-one correspondence with the two stop blocks 303, each air inlet assembly comprises a plurality of air inlets which are arranged on the expansion body 301 at intervals, each air inlet is communicated with an air inlet pipe 302, the free end of each air inlet pipe 302 sequentially penetrates through the corresponding stop block 303 and the bottom of the corresponding positioning groove 401 to extend out of the corresponding test piece sleeve 1, and a plurality of air inlets are arranged at equal intervals along the circumferential direction of the central axis of the expansion body 301 in the same group of air inlet assemblies. By adopting the technical scheme, on one hand, the contact between the expansion body 301 and the mortar anti-seepage test piece can be promoted by inflating the expansion body 301, and on the other hand, the expansion body 301 can be prevented from expanding towards the bottom of the positioning groove 401 by arranging the stop block 303, the fit between the expansion body 301 and the mortar anti-seepage test piece is improved, and the tightness between the test piece sleeve 1 and the mortar anti-seepage test piece is improved.
In another technical scheme, the device further comprises a supporting component, wherein the supporting component comprises through holes formed in the bottom of the positioning groove 401 at intervals, positioning rods are slidably arranged in the through holes, one ends of the positioning rods are located in the positioning groove 401, supporting blocks are arranged at the ends of the positioning rods, the other ends of the positioning rods are located outside the test piece sleeve 1, fixing plates are arranged at the ends of the positioning rods, and the fixing plates are in threaded connection with the test piece sleeve 1. With this solution, the supporting effect on the card 402 is achieved by providing a supporting assembly.
In another technical scheme, in the same sleeve sealing mechanism, two first springs 404 are symmetrically arranged at the bottom of the positioning groove 401 along the central axis of the positioning groove, the two first springs 404 are in one-to-one correspondence with the two clamping pieces, the lengths of the first springs 404 from the two adjusting openings 405 are equal, the free ends of the first springs 404 are fixedly connected with corresponding clamping plates 402, when the two clamping plates 402 are fixedly connected, the first springs 404 are in a stretching state, and when the two clamping plates 402 are separated, the first springs 404 are in a natural stretching state. By adopting the technical scheme, the clamping plate 402 is driven to move after the test is finished by arranging the first spring 404, so that the mortar anti-seepage test piece is conveniently taken out.
In another technical scheme, the same adjusting port 405 is provided with two positioning plates 403, the two positioning holes are connected by a screw, one end of the screw is provided with a limiting block, the other end of the screw is provided with a nut matched with the screw so as to realize the two positioning plates 403 in a threaded manner, wherein a second spring is sleeved on the screw, and the second spring is positioned between the two positioning plates 403. By adopting the technical scheme, the two positioning plates 403 at the same adjusting port 405 are fixed.
In another technical scheme, the bottom end of the test piece sleeve 1 is coaxially provided with an annular connecting plate 201, the connecting plate 201 is in threaded connection with a base 203 of an anti-permeability instrument, a plurality of annular sealing blocks 204 are arranged on the top surface of the base 203 of the anti-permeability instrument at intervals, the sealing blocks 204 are coaxially arranged with the base 203, a plurality of annular grooves 202 are formed by the interval sinking of the bottom surface of the connecting plate 201, the grooves 202 are coaxially arranged with the connecting plate 201, the grooves 202 are in one-to-one correspondence with the sealing blocks 204 so that the grooves 202 accommodate the sealing blocks 204, a first sealing ring is covered in the grooves 202, and a second sealing ring is covered on the sealing blocks 204. By adopting the technical scheme, the sealing performance of the joint of the connecting plate 201 and the impermeability instrument base 203 is realized by arranging the sealing block 204 and the groove 202.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (9)
1. The method for rapidly sealing the mortar impervious test piece is characterized by comprising the following steps of:
step one, wiping a cured mortar impervious test piece clean and airing:
winding the elastic film strips on the bottom and the top of the side wall of the mortar anti-seepage test piece respectively to form graded sealing, wherein the distance between the elastic film strips on the bottom of the side wall of the mortar anti-seepage test piece and the bottom surface of the mortar anti-seepage test piece is 10mm, and the distance between the elastic film strips on the top of the side wall of the mortar anti-seepage test piece and the top surface of the mortar anti-seepage test piece is 10mm;
step three, pressing the mortar anti-seepage test piece into an anti-seepage test mold so that the elastic film belt blocks a water flow ascending path between the sealing test piece and the side wall of the anti-seepage test mold;
the impervious test mold comprises: a test piece sleeve which is of a cylindrical structure;
the two sets of sleeve sealing mechanisms are arranged in a way that the inner side wall of the test piece sleeve is recessed at intervals up and down to form two annular positioning grooves, the positioning grooves are coaxially arranged with the test piece sleeve, the two sets of sleeve sealing mechanisms are arranged in a one-to-one correspondence manner with the two positioning grooves, each sleeve sealing mechanism comprises an expansion body clamped at the notch of the positioning groove, two adjusting ports communicated with the bottom of the positioning groove, and a clamp arranged in the positioning groove and coaxially arranged with the positioning groove, the surface of the expansion body is flush with the inner side wall of the test piece sleeve, the two adjusting ports are symmetrically arranged along the central axis of the test piece sleeve, the clamp comprises two clamping plates with the central angles of 155-175 DEG, the radius of each clamping plate is slightly larger than that of the expansion body, the two ends of each clamping plate are respectively provided with a positioning plate, each positioning plate penetrates through the two adjusting ports in a one-to-one correspondence manner and extends out of the test piece sleeve, and the two positioning plates at the same adjusting port are in a screwed manner.
The expansion body is of a hollow structure, and two groups of air inlet assemblies are arranged on one side of the expansion body, which is positioned in the positioning groove;
when the inflatable body is used, after the positioning plate is fixed, ventilation is carried out in the inflatable body through the air inlet assembly;
in the same group of sleeve sealing mechanism, the constant head tank bottom is equipped with two first springs along its axis symmetry, and two first springs and two clamping pieces one-to-one setting, the length of first spring distance two regulation mouths equals, the free end of first spring and the cardboard rigid coupling that corresponds thereof, when two cardboard fixed connection, first spring is in tensile state, when two cardboard separation, first spring is in natural elongation state.
2. The method of rapidly sealing a mortar permeation resistant test piece according to claim 1, wherein the elastic film tape is a polytetrafluoroethylene tape.
3. The method of rapidly sealing a mortar permeation resistant test piece according to claim 1, wherein the elastic film tape is wound four times around the bottom and top of the sidewall of the permeation resistant mortar test piece, respectively.
4. The method for rapidly sealing a mortar permeation resistant test piece according to claim 1, wherein in the second step, before the elastic film tape is wound on the mortar permeation resistant test piece, the method is as follows: and (3) expanding the elastic film belt, coating paraffin on the elastic film belt, heating until the paraffin is melted, and finally winding one surface of the elastic film coated with the paraffin on the mortar impervious test piece.
5. The method of rapidly sealing a mortar permeation resistant test piece according to claim 1, wherein a vertical length of the clamping plate is less than a width of the detent notch.
6. The method for rapidly sealing a mortar impervious test piece according to claim 1, wherein annular stop blocks are respectively arranged on the upper side wall and the lower side wall of the positioning groove, the stop blocks are coaxially arranged with the positioning groove, the clamping plate is positioned between the two stop blocks, and the stop blocks are in contact with the expansion body;
the two sets of the air inlet assemblies are arranged in one-to-one correspondence with the two check blocks, the air inlet assemblies comprise a plurality of air inlets which are arranged on the expansion body at intervals, the air inlets are communicated with an air inlet pipe, the free ends of the air inlet pipe sequentially penetrate through the check blocks and the bottoms of the positioning grooves to extend out of the test piece sleeve, and a plurality of air inlets are arranged at equal intervals along the circumference of the central axis of the expansion body in the same air inlet assembly.
7. The method of rapidly sealing a mortar anti-permeability test piece according to claim 1, further comprising a supporting component comprising through holes arranged at the bottom of the positioning groove at intervals, wherein positioning rods are slidably arranged in the through holes, one ends of the positioning rods are positioned in the positioning groove, the ends are provided with supporting blocks, the other ends are positioned outside the test piece sleeve, the ends are provided with fixing plates, and the fixing plates are in threaded connection with the test piece sleeve.
8. The method for rapidly sealing a mortar anti-seepage test piece according to claim 1, wherein at the same adjusting port, two positioning plates are provided with positioning holes, the two positioning holes are connected through a screw, one end of the screw is provided with a limiting block, the other end of the screw is provided with a nut matched with the screw so as to realize the threaded connection of the two positioning plates, and a second spring is sleeved on the screw and is positioned between the two positioning plates.
9. The method for rapidly sealing a mortar anti-permeability test piece according to claim 1, wherein an annular connecting plate is coaxially arranged at the bottom end of the test piece sleeve, the connecting plate is in threaded connection with a base of an anti-permeability instrument, a plurality of annular sealing blocks are arranged on the top surface of the base of the anti-permeability instrument at intervals, the sealing blocks are coaxially arranged with the base, a plurality of annular grooves are formed by the interval sinking of the bottom surface of the connecting plate, the grooves are coaxially arranged with the connecting plate, the grooves are in one-to-one correspondence with the sealing blocks so that the grooves accommodate the sealing blocks, a first sealing ring is covered in the grooves, and a second sealing ring is covered on the sealing blocks.
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