CN1916624B - Method for sealing impervious test piece in concrete - Google Patents
Method for sealing impervious test piece in concrete Download PDFInfo
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- CN1916624B CN1916624B CN2006100531256A CN200610053125A CN1916624B CN 1916624 B CN1916624 B CN 1916624B CN 2006100531256 A CN2006100531256 A CN 2006100531256A CN 200610053125 A CN200610053125 A CN 200610053125A CN 1916624 B CN1916624 B CN 1916624B
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Abstract
A method for sealing impervious test piece of concrete includes placing seal material on test piece, using pressurization unit to press test piece into test piece jacket, making said seal material be form of seal cylindrical jacket prepared by elastic waterproof material, setting thickness of seal cylindrical jacket to be uniform at each position, making height of seal cylindrical jacket be greater than test piece and internal diameter of seal cylindrical jacket be less than diameter of test piece at the same height as well as internal diameter of test piece jacket be greater than diameter oftest piece at the same height.
Description
What technical field the present invention relates to is a kind of method for sealing impervious test piece in concrete.
The background technology concrete impermeability is an important indicator estimating endurance performance of concrete, obtains by concrete impermeability test.The most frequently used impermeability test method for concrete is that the degree of measuring test specimen generation infiltration after applying definite hydraulic pressure by the concrete impervious test piece to the height that definite xsect is arranged and determine obtains its anti-penetration grade, as determined concrete impermeability test in State Standard of the People's Republic of China " normal concrete long-term behaviour and endurance quality test method " (GBJ 82-85).The impermeability test method for concrete of this standard code is one group of tested concrete impervious test piece to be packed into to be installed in behind the specimen sleeve on the special-purpose concrete impervious instrument test, in accordance with regulations method water pressurizes in the test specimen bottom surface during test, draws the anti-penetration grade of detected concrete impervious test piece by observed whole group of test specimen surface seep situation and internal penetration situation and the corresponding hydraulic pressure that is applied.This standard has been stipulated two kinds of standard shape and size to concrete impervious test piece, and a kind of is that the end face diameter is 175mm, and the bottom surface diameter is 185mm, highly is the Rotary-table test specimen of 150mm; Another kind is diameter and the right cylinder test specimen that highly is 150mm.The most Rotary-table test specimens that adopt of the concrete impermeability test of using at present.
Test findings procurement process in view of this impermeability test method for concrete, have only water to pass through the anti-permeability performance that seepage that concrete sample inside taken place is just represented concrete sample, thereby do not allow in test water between test specimen and specimen sleeve, to see through, peripheral seepage promptly takes place, otherwise can cause test findings untrue, therefore between test specimen and specimen sleeve, will seal.The method that existing this seals between test specimen and specimen sleeve is: earlier be coated with the encapsulant that last layer has melted in the side of concrete impervious test piece, be pressed in the specimen sleeve of baking oven preheating by pressue device with being about to test specimen, cooling back pressure relief is finished sealing slightly.Wherein, the seal coating of impervious test piece side is to be the mix of Main Ingredients and Appearance with butter and paraffin, and specimen sleeve need mainly be that both to have made seal coating meet heat soft or melt and combine closely with the specimen sleeve inside surface of steel through preheating, make again specimen sleeve cooling shrink between back itself and the impervious test piece join tightr, to reach the purpose of sealing.
But there are the following problems for existing encapsulating method: 1, encapsulant is not easy to be coated with and evenly causes easily side leakage taking place and end test, and must change test specimen carries out seal operation again and restart test, causes material, the energy and waste of time.2, the preheating of the coating of encapsulant and specimen sleeve makes operation very inconvenient and the seal operation time is long, inefficiency on the test specimen.3, encapsulant is the ointment form, and discarded encapsulant influences the cleaning and the environmental protection of working environment in the process of the test.
Summary of the invention is at above-mentioned deficiency, technical matters to be solved by this invention be as how better encapsulating method substitute existing encapsulating method, to eliminate peripheral leakage problems, make simultaneously encapsulating method simpler and more direct, clean.
Method for sealing impervious test piece in concrete provided by the invention earlier applies encapsulant outside test specimen, on pressue device test specimen is pressed into specimen sleeve again, and wherein said encapsulant is a sealing sleeve made from the elasticity water-resistant material; The profile of sealing sleeve is similar to test specimen, and the thickness of sealing sleeve is even everywhere, and the height of sealing sleeve is greater than the test specimen height; The internal diameter of sustained height upper seal bore cover is less than the diameter of test specimen; The internal diameter of specimen sleeve is greater than the diameter of test specimen on the sustained height.
Method for sealing impervious test piece in concrete provided by the invention, the elasticity water-resistant material of said manufacturing sealing sleeve are rubber or plastic cement or thermoplastic elastomer.
Method for sealing impervious test piece in concrete provided by the invention, the thickness of said sealing sleeve is at 0.5mm-10mm.Sealing sleeve is thin excessively, and the wearing and tearing ability between opposing test specimen and the specimen sleeve is low and can cause serviceable life not long, and the anxiety that easily causes the sealing effectiveness deficiency because of sample dimensions error or small distortion is also arranged; Sealing sleeve is blocked up, and the internal diameter of specimen sleeve need be fit to blocked up sealing sleeve and bigger, and sealing sleeve can make test specimen pass from specimen sleeve by compression like this, also will cause the waste of water-fast resilient material.
Method for sealing impervious test piece in concrete provided by the invention, the said encapsulant that outside test specimen, applies, be meant sealing sleeve is enclosed within outer process of test specimen or the process of lining in specimen sleeve, can earlier sealing sleeve be enclosed within the test specimen that test specimen will be with sealing sleeve outward more in other words and be pressed in the specimen sleeve, also can in specimen sleeve, test specimen is pressed in the specimen sleeve that is lined with sealing sleeve again the sealing sleeve lining earlier; Said test specimen is pressed into specimen sleeve, its termination pressure is 0.5Mpa-2.0Mpa, termination pressure is related to the compression degree of sealing sleeve, also just be related to the seal degree between test specimen and the specimen sleeve, relevant with desired maximum hydraulic pressure in material behavior, thickness and the impermeability test of sealing sleeve, the gentle malleability of the material of sealing sleeve is good more, the thick more termination pressure of thickness is high more, but needn't surpass desired maximum hydraulic pressure in the impermeability test, has surpassed also there is no need.
Method for sealing impervious test piece in concrete provided by the invention, it is the seal coating of Main Ingredients and Appearance that the sealing sleeve of making in order to the elasticity water-resistant material substitutes in original method with butter and paraffin, overcome original method seal coating and be not easy to be coated with of the waste that caused of all even specimen sleeve need through preheating, save baking oven equipment, simplified workflow.Use sealing sleeve to compare with the coating seal coating more to have simple to operation, high efficiency and sealing sleeve can use repeatedly, save the characteristics of cost and protection environment, also do not have the problem that has a strong impact on the working environment health as seal coating.
Description of drawings Fig. 1 is the cut-open view after the mentioned test specimen-1 of the present invention, specimen sleeve-2 and sealing sleeve-3 combination.
2, will go up earlier that the hole internal diameter is 174mm, down the hole internal diameter is 184mm, highly is that 155mm, thickness are that the rubber sleeve of 3mm is enclosed within on the concrete standard test specimen, it is 177mm that the test specimen that will be with rubber sleeve again is contained in the small end internal diameter, big end internal diameter is 187mm, highly be in the specimen sleeve of 155mm, with pressing machine test specimen is pressed in the specimen sleeve at last, termination pressure is 1.0Mpa.
3, will go up earlier that the hole internal diameter is 174.5mm, down the hole internal diameter is 184.5mm, highly is 178mm for 157mm, thickness are that the rubber sleeve of 5mm serves as a contrast at the small end internal diameter, big end internal diameter is 188mm, highly be in the specimen sleeve of 157mm, again the concrete standard test specimen is inserted in the specimen sleeve that is lined with rubber sleeve, with pressing machine test specimen is pressed in the specimen sleeve at last, termination pressure is 1.5Mpa.
4, will go up earlier that the hole internal diameter is 174.5mm, down the hole internal diameter is 184.5mm, highly is that 160mm, thickness are that the rubber sleeve of 10mm is enclosed within on the concrete standard test specimen, it is 180mm that the test specimen that will be with rubber sleeve again is contained in the small end internal diameter, big end internal diameter is 190mm, highly be in the specimen sleeve of 160mm, with pressing machine test specimen is pressed in the specimen sleeve at last, termination pressure is 2.0Mpa.
Claims (5)
1. method for sealing impervious test piece in concrete applies encapsulant earlier outside test specimen, on pressue device test specimen is pressed into specimen sleeve again, it is characterized in that said encapsulant is a sealing sleeve made from the elasticity water-resistant material; The profile of sealing sleeve is similar to test specimen, and the thickness of sealing sleeve is even everywhere, and the height of sealing sleeve is greater than the test specimen height; The internal diameter of sustained height upper seal bore cover is less than the diameter of test specimen; The internal diameter of specimen sleeve is greater than the diameter of test specimen on the sustained height.
2. method for sealing impervious test piece in concrete as claimed in claim 1, the elasticity water-resistant material that it is characterized in that said manufacturing sealing sleeve are rubber or plastic cement or thermoplastic elastomer.
3. method for sealing impervious test piece in concrete as claimed in claim 1 or 2, the thickness that it is characterized in that said sealing sleeve is at 0.5mm-10mm.
4. method for sealing impervious test piece in concrete as claimed in claim 1 or 2 is characterized in that said test specimen being pressed into specimen sleeve, and its termination pressure is 0.5Mpa-2.0Mpa.
5. method for sealing impervious test piece in concrete as claimed in claim 3 is characterized in that said test specimen being pressed into specimen sleeve, and its termination pressure is 0.5Mpa-2.0Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100531256A CN1916624B (en) | 2006-08-18 | 2006-08-18 | Method for sealing impervious test piece in concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100531256A CN1916624B (en) | 2006-08-18 | 2006-08-18 | Method for sealing impervious test piece in concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1916624A CN1916624A (en) | 2007-02-21 |
| CN1916624B true CN1916624B (en) | 2010-07-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100531256A Expired - Fee Related CN1916624B (en) | 2006-08-18 | 2006-08-18 | Method for sealing impervious test piece in concrete |
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| Country | Link |
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| CN (1) | CN1916624B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806702B (en) * | 2010-03-02 | 2011-04-27 | 王明贵 | Method for testing concrete impermeability |
| CN104977235A (en) * | 2015-07-14 | 2015-10-14 | 中震(北京)工程检测有限公司 | Method for concrete impermeability test adopting rubber sleeve seal |
| CN107677583B (en) * | 2017-11-02 | 2020-06-19 | 南京工程学院 | Piston type hydraulic pressure automatic clamping rubber sealing concrete impermeability test device |
| CN109211752A (en) * | 2018-09-06 | 2019-01-15 | 中交武汉港湾工程设计研究院有限公司 | A kind of method of fast sealing concrete impervious test piece |
| CN109540616A (en) * | 2018-11-12 | 2019-03-29 | 上海凯顿百森建筑材料科技发展有限公司 | A kind of production method of mortar impervious test piece |
| CN110398443B (en) * | 2019-08-16 | 2020-04-03 | 东莞市交港建材有限公司 | Concrete impermeability test structure and test method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4427603C1 (en) * | 1994-08-04 | 1995-07-27 | Norbert Heinker | Seal around pipe passing through concrete wall in ground water areas |
| CN1181502A (en) * | 1997-11-07 | 1998-05-13 | 清华大学 | Method for fast determining anti-permeability of concrete |
-
2006
- 2006-08-18 CN CN2006100531256A patent/CN1916624B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4427603C1 (en) * | 1994-08-04 | 1995-07-27 | Norbert Heinker | Seal around pipe passing through concrete wall in ground water areas |
| CN1181502A (en) * | 1997-11-07 | 1998-05-13 | 清华大学 | Method for fast determining anti-permeability of concrete |
Non-Patent Citations (1)
| Title |
|---|
| 周永忠.水工混凝土抗渗试验方法的改进.人民珠江.2003,23,24. * |
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| Publication number | Publication date |
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| CN1916624A (en) | 2007-02-21 |
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Granted publication date: 20100714 |