CN108918387A - It is a kind of for detecting the impervious test method of mortar - Google Patents
It is a kind of for detecting the impervious test method of mortar Download PDFInfo
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- CN108918387A CN108918387A CN201810805615.XA CN201810805615A CN108918387A CN 108918387 A CN108918387 A CN 108918387A CN 201810805615 A CN201810805615 A CN 201810805615A CN 108918387 A CN108918387 A CN 108918387A
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- mortar
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- impervious
- sealant
- specimen
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- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 66
- 238000010998 test method Methods 0.000 title claims abstract description 13
- 238000012360 testing method Methods 0.000 claims abstract description 60
- 239000000565 sealant Substances 0.000 claims abstract description 25
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Natural products CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000002156 mixing Methods 0.000 claims abstract description 21
- 239000000084 colloidal system Substances 0.000 claims abstract description 15
- 239000004568 cement Substances 0.000 claims abstract description 14
- 230000003487 anti-permeability effect Effects 0.000 claims abstract description 11
- 239000004590 silicone sealant Substances 0.000 claims abstract description 9
- 239000011248 coating agent Substances 0.000 claims abstract description 7
- 238000000576 coating method Methods 0.000 claims abstract description 7
- 238000001125 extrusion Methods 0.000 claims abstract description 5
- 238000001035 drying Methods 0.000 claims abstract description 4
- 125000000218 acetic acid group Chemical group C(C)(=O)* 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000002474 experimental method Methods 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000004615 ingredient Substances 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 239000003292 glue Substances 0.000 claims 1
- 230000000630 rising effect Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 2
- 239000012188 paraffin wax Substances 0.000 description 11
- 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 6
- 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 6
- 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 6
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 4
- 235000014121 butter Nutrition 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical class OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000006210 lotion Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- 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
- G01N1/38—Diluting, dispersing or mixing samples
-
- 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)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Dispersion Chemistry (AREA)
- Examining Or Testing Airtightness (AREA)
- Sealing Material Composition (AREA)
Abstract
The present invention relates to a kind of for detecting the test method of mortar anti-permeability performance, it puts the mortar block to be measured conserved into standard laboratory and carries out standing and drying processing 0.5h, the inner wall of impervious test mould is coated uniformly on mixing sealant, mix sealant with a thickness of 1~2mm.Then mortar block press machine is pressed into impervious test mould and forms mortar specimen, make have colloid extrusion in the above and below gap of mortar specimen, as gap occurs re-starting coating operation in mortar specimen.Mortar specimen bottom surface after being pressed into mortar block is parallel with the bottom surface of impervious test mould, scrapes off the colloid squeezed out in the gap of mortar specimen above and below, carries out impermeability test after placing 2h in the lab.Mixing sealant is acetic acid silicone sealant and quick hardening sulphoaluminate cement by weight 2:1 is uniformly mixed to prepare.The present invention solves the problems, such as easy leak when detection High Voltage, optimizes detection operating process, improves detection effect and accuracy.
Description
Technical field
The invention belongs to construction material technical field of performance test, are related to a kind of detection technique of mortar, and in particular to one
Kind is for detecting the impervious test method of mortar.
Background technique
The anti-permeability performance of waterproof mortar drastically influences its using effect, resists to meet requirement to waterproof mortar
Seeping performance test is particularly important.The impermeability pressure with waterproof performance mortar is generally all in 1.5MPa or more at present, according to
To mortar specimen 7d impermeability pressure requirement >=1.5MPa in GB 23440-2009 standard, when detecting mortar specimen impermeability pressure,
It needs that the painting of mortar block is first covered with one layer of rosin paraffin liquid or using butter and cement weight than 1:3 lotion is sealed,
It places into impervious test mould and is fastened.The solidification in coating of rosin paraffin liquid method is difficult coating uniformly quickly, in operation, thick
Degree is also difficult uniform.It is rigid contact between mortar specimen and impervious test mould, the ductility being pressurized after the hardening of rosin paraffin liquid is very
Difference is easy to produce gap, and the paraffin after hardening is difficult to seal up irregular gap and (is generated due to the scrambling of mortar block
Gap between impervious test mould) butter cement seal method firm time is long, 1d or more is generally required, and be extremely difficult to 1.5MPa
When it is water-tight, hydraulic pressure Gao Shihui occurs spurting water column from leak between mortar block and impervious test mould, when serious.The prior art
The bad control of paraffin temperature, the leakproofness of paraffin is poor, will leak at paraffin sealing when hydraulic pressure reaches 0.6MPa or so
Water phenomenon, condenses into solid at once after being coated on test specimen because of paraffin, fragile material has been condensed into after being put on pressuring machine,
There is no ductility after withstanding pressure, the sealing function to Anomalistic space cannot be played very well, be not able to satisfy actually detected mortar
Impervious needs.
Summary of the invention
The present invention provides a kind of for detecting the impervious test method of mortar, and easy leak is asked when solving to detect High Voltage
Topic, optimizing detection operating process improve detection effect and accuracy.
The technical scheme is that：For detecting the test method of mortar anti-permeability performance, the mortar to be measured that will conserve
Block puts standard laboratory into and carries out standing and drying processing 0.5h, and the inner wall of impervious test mould is coated uniformly on mixing sealant, is mixed
Close sealant with a thickness of 1~2mm.Then mortar block press machine is pressed into impervious test mould and forms mortar specimen, make mortar block
Above and below gap in have colloid extrusion, as gap occurs re-starting coating operation in mortar specimen.After being pressed into mortar block
Mortar specimen bottom surface it is parallel with the bottom surface of impervious test mould, scrape off the colloid squeezed out in the gap of mortar specimen above and below, testing
Impervious experiment is carried out after placing 2h in room.
Mixing sealant is acetic acid silicone sealant and quick hardening sulphoaluminate cement by weight 2:1 is uniformly mixed to prepare.
Impervious test mould is conical structure, and the back cut diameter of cone is 70mm, lower port diameter 80mm, is highly 30mm, uses steel plate
Or aluminium sheet is made.
Impermeability test includes the following steps：
(1) ingredient, mixing mortar are carried out by standard requirements, impervious test mould is once filled after mixing thoroughly, on a vibration table molding vibration
It is real, it is smoothed out after wiping extra slurry off, prepares 6 test specimens；
(2) 24 ± 2h of moisture-keeping maintaining in the environment of 20 ± 3 DEG C of temperature, relative humidity 90%~100%, is being put into 20 ± 2
DEG C maintenance pond in maintenance to 7d age, surface washing is clean；
(3) after dry tack free, mixing sealant is fitted into impervious test mould, can be carried out after sealant hardening to be mixed
Impervious water permeabillity test；The water pressure test is carried out according to standard requirements, is gradually boosted during test：1. hydraulic pressure since 0.2MPa,
Constant pressure 2h increases to 0.3MPa, increases hydraulic pressure 0.1MPa every 1h later；2. being forced into after 1.5MPa, constant pressure 1h is not permeable, stops
Boosting；3. do not occur the maximum pressure value to seep water as test specimen impermeability pressure using 4 in every 6 test specimens, such as to 1.5MPa when have 4
The above test specimen keeps 1h not seep water, then maximum impermeability pressure >=1.5MPa.
The present invention is according to GB 23440-2009《Inorganic leak-stopping material》, prepare normal sand and meet GB 175-2007
42.5 grades of ordinary portland cements, to belong to 6 impervious test moulds, shake table, mortar mixer, mortars impervious for frustum of a cone band down payment
Instrument and water.
The present invention utilizes acetic acid silicone sealant and quick hardening sulphoaluminate cement for detecting the impervious test method of mortar
By weight 2:1 is made the inner wall that mixing sealant is coated uniformly on impervious test mould, solves easy leak when detection High Voltage
Problem optimizes detection operating process, improves detection effect and accuracy.The present invention overcomes the prior arts cannot detect height
The deficiency of hydraulic pressure avoids high-temperature heating compared with compared with rosin paraffin method, has easy to operate, Environmental Safety, sealing
The advantages of complete and easy to clean is suitable for the experimental enviroment of 1.5MPa high pressure.
Detailed description of the invention
Fig. 1 is the mold schematic diagram for detecting mortar impermeability test；
Wherein：A-mortar specimen, b-mixing sealant, c-impervious test mould.
Specific embodiment
Below with reference to embodiment and attached drawing, the present invention is described in detail.The scope of protection of the present invention is not limited to the embodiment,
Those skilled in the art make any change within the scope of the claims and also belong to the scope of protection of the invention.
The test method that the present invention is used to detect mortar anti-permeability performance is, first by acetic acid silicone sealant and fast hard sulfuric acid
Salt cement is according to weight ratio 2:1 is uniformly mixed and made into mixing sealant.Accelerate hard sulfate cement in toward acetic acid silicone sealant
It when material, is uniformly sprinkled upon on colloid, is added in two portions, put on environmentally friendly acid-proof gloves and grabbed repeatedly and hold operation, make fast hard sulfate
Cement is uniformly mixed with acetic acid silicone sealant.The mortar block to be measured conserved is put into standard laboratory to carry out at standing and drying
0.5h is managed, mortar block surface Ming Shui is wiped.It is coated uniformly on the inner wall of impervious test mould c with mixing sealant b, mixes sealant
With a thickness of 1mm.Then mortar block press machine is pressed into impervious test mould and forms mortar specimen 1, make the bottom surface of mortar specimen with
The bottom surface of impervious test mould flushes.As shown in Figure 1, impervious test mould c is conical structure, the back cut diameter of cone is 70mm, under
Mouth diameter is 80mm, is highly 30mm, is surrounded with steel plate.It is required that having colloid extrusion in the gap of the above and below of mortar specimen, such as
Fruit, which has partial gap region, colloid extrusion, illustrates that colloid is not filled by full herein, and this occurs needs to re-start
Coating operation, it is ensured that the bottom surface mortar specimen a of indentation mortar block is parallel with the bottom surface of impervious test mould c.It must not tilt and be higher by, scrape
The colloid squeezed out in the gap of above and below is removed, pays attention to preventing colloid from coating in the top and bottom of mortar specimen, is coated onto accidentally if any colloid
Surface is rooted out completely with pocket knife, leaks out screed.The colloid squeezed out in the gap of mortar specimen above and below is scraped off, after processing is clean
Impervious experiment is carried out after placing 2h in the lab.
The step of impermeability test is：
(1) ingredient, mixing mortar are carried out by standard requirements, impervious test mould c is once filled after mixing thoroughly, is formed on a vibration table
Jolt ramming smoothes out after wiping extra slurry off, prepares 6 test specimens；
(2) 24 ± 2h of moisture-keeping maintaining in the environment of 20 ± 3 DEG C of temperature, relative humidity 90%~100%, is being put into 20 ± 2
DEG C maintenance pond in maintenance to 7d age, surface washing is clean；
(3) after dry tack free, mixing sealant is fitted into impervious test mould c, sealant hardening to be mixed can be resisted
Permeate water test；Hydraulic pressure is gradually boosted according to standard requirements：1. hydraulic pressure, since 0.2MPa, constant pressure 2h increases to 0.3MPa,
Increase hydraulic pressure 0.1MPa every 1h later；2. fully meeting that 1.5MPa in standard criterion is non-leakage to be wanted to ensure to mix sealant
It asks, constant pressure 1h is not permeable after test hydraulic pressure is enlarged to 1.8MPa, stops boosting；3. not seeped with 4 in every 6 test specimens
The maximum pressure value of water is test specimen impermeability pressure, such as to 1.5MPa when there are 4 or more test specimens holding 1h not seep water, then it is maximum impervious
Pressure >=1.5MPa.
After experiment, mortar block is tapped out from impervious test mould with hammer, with wallpaper knife cleaning iron mould inner wall
Colloid.
Watch 1 is to mix sealant progress sand made of sulfate cement firmly with fast with acetic acid silicone sealant using the present invention
Starch the result of anti-permeability performance detection test.It is mixed with paraffin to list the prior art convenient for comparing, in table 1 and is done with rosin resin
Sealant and the data for making sealant progress mortar anti-permeability performance detection test with butter and cement mixing.Table 1 is the result shows that originally
Invention with acetic acid silicone sealant and fast hard sulfate cement be mix sealant detection mortar anti-permeability performance test method it is excellent
In the test method of the prior art.
Table 1：The impermeability pressure (MPa) of different sealing method
| Impermeability pressure, MPa | Paraffin and rosin resin | Butter and cement | Sealant and quick-hardening cement |
| 0.5 | Non- leak | 5 pieces of leaks in 6 pieces | Non- leak |
| 0.6 | 2 pieces of leaks in 6 pieces | 5 pieces of leaks in 6 pieces | Non- leak |
| 0.7 | 4 pieces of leaks in 6 pieces | 6 pieces of whole leaks | Non- leak |
| 0.8 | 5 pieces of leaks in 6 pieces | ---- | Non- leak |
| 1.0 | 6 pieces of whole leaks | ---- | Non- leak |
| 1.5 | ---- | ---- | Non- leak |
| 1.8 | ----- | ---- | Non- leak |
Claims (4)
1. it is a kind of for detecting the test method of mortar anti-permeability performance, it is characterized in that：Put the mortar block to be measured conserved into mark
Quasi-experiment room carries out standing and drying and handles 0.5h, and the inner wall of impervious test mould c, mixing sealing are coated uniformly on mixing sealant b
Glue with a thickness of 1~2mm；Then mortar block press machine is pressed into impervious test mould and forms mortar specimen a, make mortar specimen
There is colloid extrusion in the gap of above and below, as gap occurs re-starting coating operation in mortar specimen；After being pressed into mortar block
Mortar specimen bottom surface is parallel with the bottom surface of impervious test mould, scrapes off the colloid squeezed out in the gap of test block above and below, in the lab
Impervious experiment is carried out after placing 2h.
2. according to claim 1 for detecting the test method of mortar anti-permeability performance, it is characterized in that：The mixing sealant
B is acetic acid silicone sealant and quick hardening sulphoaluminate cement by weight 2:1 is uniformly mixed to prepare.
3. according to claim 1 for detecting the test method of mortar anti-permeability performance, it is characterized in that：The impervious test mould c
Back cut diameter for conical structure, cone is 70mm, lower port diameter 80mm, is highly 30mm, with steel plate or aluminium sheet system
At.
4. according to claim 1 for detecting the test method of mortar anti-permeability performance, it is characterized in that：The impermeability test packet
Include following steps：
(1) ingredient, mixing mortar are carried out by standard requirements, impervious test mould c are once filled after mixing thoroughly, forms jolt ramming on a vibration table,
It is smoothed out after wiping extra slurry off, prepares 6 test specimens；
(2) 24 ± 2h of moisture-keeping maintaining in the environment of 20 ± 3 DEG C of temperature, relative humidity 90%~100%, places into 20 ± 2 DEG C
It is to 7d age, surface washing is clean to conserve maintenance in pond；
(3) after dry tack free, mixing sealant is fitted into impervious test mould c, can be carried out after sealant hardening to be mixed impervious
Water permeabillity test；The water pressure test is carried out according to standard requirements, is gradually boosted during test：1. hydraulic pressure is since 0.2MPa, constant pressure
2h increases to 0.3MPa, increases hydraulic pressure 0.1MPa every 1h later；2. being forced into after 1.5MPa, constant pressure 1h is not permeable, stops rising
Pressure；3. do not occur the maximum pressure value to seep water as test specimen impermeability pressure using 4 in every 6 test specimens, such as to 1.5MPa when have 4 with
Upper test specimen keeps 1h not seep water, then maximum impermeability pressure >=1.5MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810805615.XA CN108918387B (en) | 2018-07-20 | 2018-07-20 | Test method for detecting impermeability of mortar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810805615.XA CN108918387B (en) | 2018-07-20 | 2018-07-20 | Test method for detecting impermeability of mortar |
Publications (2)
| Publication Number | Publication Date |
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| CN108918387A true CN108918387A (en) | 2018-11-30 |
| CN108918387B CN108918387B (en) | 2021-06-25 |
Family
ID=64414599
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109883925A (en) * | 2019-03-27 | 2019-06-14 | 武汉大学 | The coarse crack of change aperture and preparation method thereof for visualized experiment |
| CN111471427A (en) * | 2020-04-07 | 2020-07-31 | 衡水衡宝胶业有限公司 | Preparation method of TPIN bi-component sealant |
| CN112834299A (en) * | 2020-12-31 | 2021-05-25 | 中铁十八局集团有限公司 | Sealing material based on fly ash machine-made sand mortar impermeability test and use method thereof |
| IT202000016993A1 (en) * | 2020-07-13 | 2022-01-13 | Alice Berto | REINFORCED STRUCTURAL COMPONENT OR FLEXIBLE ROD |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109883925A (en) * | 2019-03-27 | 2019-06-14 | 武汉大学 | The coarse crack of change aperture and preparation method thereof for visualized experiment |
| CN109883925B (en) * | 2019-03-27 | 2024-02-13 | 武汉大学 | Variable-opening rough crack for visual experiment and manufacturing method thereof |
| CN111471427A (en) * | 2020-04-07 | 2020-07-31 | 衡水衡宝胶业有限公司 | Preparation method of TPIN bi-component sealant |
| IT202000016993A1 (en) * | 2020-07-13 | 2022-01-13 | Alice Berto | REINFORCED STRUCTURAL COMPONENT OR FLEXIBLE ROD |
| WO2022013750A1 (en) * | 2020-07-13 | 2022-01-20 | Berto Alice | Reinforced structural component or flexible tie rod |
| CN112834299A (en) * | 2020-12-31 | 2021-05-25 | 中铁十八局集团有限公司 | Sealing material based on fly ash machine-made sand mortar impermeability test and use method thereof |
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| Publication number | Publication date |
|---|---|
| CN108918387B (en) | 2021-06-25 |
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