CN106323837A - Novel testing method for anti-permeability and durability of cement concrete - Google Patents
Novel testing method for anti-permeability and durability of cement concrete Download PDFInfo
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- CN106323837A CN106323837A CN201610700912.9A CN201610700912A CN106323837A CN 106323837 A CN106323837 A CN 106323837A CN 201610700912 A CN201610700912 A CN 201610700912A CN 106323837 A CN106323837 A CN 106323837A
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- 238000012360 testing method Methods 0.000 title claims abstract description 86
- 239000004568 cement Substances 0.000 title claims abstract description 24
- 230000003487 anti-permeability effect Effects 0.000 title abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 33
- 230000035515 penetration Effects 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000013535 sea water Substances 0.000 claims abstract description 10
- 239000000243 solution Substances 0.000 claims abstract description 10
- 230000035699 permeability Effects 0.000 claims abstract description 9
- 238000002347 injection Methods 0.000 claims abstract description 4
- 239000007924 injection Substances 0.000 claims abstract description 4
- 238000010998 test method Methods 0.000 claims description 16
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 12
- 238000012423 maintenance Methods 0.000 claims description 9
- 238000002360 preparation method Methods 0.000 claims description 8
- 239000011780 sodium chloride Substances 0.000 claims description 7
- 230000008595 infiltration Effects 0.000 claims description 6
- 238000001764 infiltration Methods 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- 239000011398 Portland cement Substances 0.000 claims description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract description 5
- 238000005070 sampling Methods 0.000 abstract 2
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 10
- 239000000203 mixture Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 230000007774 longterm Effects 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000007716 flux method Methods 0.000 description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000037427 ion transport Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 239000010959 steel 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
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0076—Hardness, compressibility or resistance to crushing
- G01N2203/0087—Resistance to crushing
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Dispersion Chemistry (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a novel testing method for the anti-permeability and durability of cement concrete. The novel testing method comprises the following steps: (1) forming a test piece through a die, stripping the die after 24 hours, and maintaining for 28 days in test equipment; (2) draining water in the test equipment in advance, adding the solution into water injection holes of the test equipment for performing anti-permeability test; (3) performing the anti-permeability test by adopting an anti-permeability grading method and a permeable depth method; (4) splitting the test piece, and taking sampling points from the section; (5) determining the permeability height of each sampling point, calculating the average, and performing data processing to obtain the anti-salt permeability performance of each test piece; and (6) performing the compression strength test. Compared with the prior art, the test period can be shortened and the timeliness can be improved by adopting the novel testing method; the operating complexity of the test can be reduced; and the chloride ion penetration resistance capability of the concrete under the pressure environment of seawater can be met, and the test accuracy can be improved.
Description
Technical field
The invention belongs to cement concrete performance detection technique field, particularly to one for cement concrete anti-chlorine from
The new test method of oozing property of son and durability.
Background technology
The permeability values method of China's cement concrete water resistant is anti-penetration grade method at present, and followed specification is " common
Concrete long-term behaviour and endurance quality test method " (nation-building ministerial standard GBJ82-1985).Detection equipment is country's skill
The standard HS-40 type concrete penetrometer that art surveillance authority is assert.
And for the endurancing of the cement concrete water resistant under the environment of under briny environment and salt-soda soil, then follow
Two kinds of methods of regulation in " Standard for test methods of longterm performance and durability of ordinary concrete standard " (standard GB/T 50082):
Quickly chloride ion transport Y-factor method Y (RCM method) and electric flux method.Both approaches is desirable that testing equipment and the dress possessing complexity
Put, as test apparatus precision prescribed is high, test specimen is less, test specimen makes operation complexity and later data processes loaded down with trivial details and complicated, from
And result in both approaches test period length and seondary effect in process of the test can increase test error.Meanwhile, RCM method is wanted
Ask chemical reagent kind many and operation complexity, and electric flux method is not suitable for mixed with the good conductive material such as nitrite and steel fibre
Agent on crack resistance of concrete chloride permeability test.For Anti-Chloride Ion Penetration, both of which under given different pressures value effect
Result of the test cannot be obtained.
Therefore, need a kind of new test method at present badly, simple to operation, convenient and swift to the process of result of the test,
The cement concrete evaluation index to the anti-permeability performance of chloride ion under obtaining briny environment simultaneously.
Summary of the invention
The defect existed based on prior art, the present invention proposes a kind of for Anti-Penetrability of Cement Concrete and durability
New test method, for detecting the Anti-Chloride Ion Penetration of the cement concrete material of different mixture ratio, it is thus achieved that evaluate and refer to
Mark.
The present invention proposes a kind of new test method for Anti-Penetrability of Cement Concrete and durability, and the method includes
Following steps:
Step 1, by test specimen by mould molding, form removal after 24 hours, maintenance 28 days in testing equipment；
Step 2, in advance the water in testing equipment is drained only, solution is added testing equipment water injection hole and carries out impervious examination
Test；
Step 3, employing seepage-resistant grade method and length of penetration method carry out the impermeability test of test specimen；
Step 4, by after test piece splitting, take sampled point at section；
Step 5, measure the permeated height of each sample point, and calculate meansigma methods, and with this calculation permeability coefficient, infiltration system
The computing formula of number is expressed as:
SK=MDm 2/2tH
In formula, SKThe relative coefficient of permeability measured for length of penetration method；
DmFor average permeated height；
H is the hydraulic pressure represented with water-column；
T is constant voltage elapsed time,
M is the water absorption rate of concrete, generally；
Draw the anti-salt penetration performance of each group of test specimen；
Step 6, carry out test specimen compressive strength test.
Maintenance in described step 1 20 DEG C, carry out under 90% relative humidities.
Test specimen in described step 1 is cement, and described cement meets P.O 42.5 Portland cement, modulus of fineness
The medium sand of 2.55, the relevant criterion of stone maximum particle diameter Dmax=25mm.
Solution in described step 2 is for manually preparing sea water, and described artificial preparation sea water is for using large-scale bucket, manually carrying
Front stirring preparation, formulated salinity 3.5%NaCl solution.
Compared with prior art, the present invention can reach following good effect:
(1) shorten the test period long, thus reduce the time cost of test, improve it ageing；(2) need not various
Complex instrument, uses the test of conventional H S-40 type concrete penetrometer, and result post processing is simple to operation；(3) experimental implementation is reduced
Complexity, (4) determine the resistance of concrete to chloride ion penetration of concrete under seawater pressure environment, can improve the accuracy of test.
Accompanying drawing explanation
Fig. 1 is the overall flow of a kind of new test method for Anti-Penetrability of Cement Concrete and durability of the present invention
Figure.
Detailed description of the invention
In order to be able to further appreciate that the summary of the invention of the present invention, feature and effect, real to the present invention below in conjunction with accompanying drawing
The mode of executing is described in further detail.
The present invention uses GBJ82-1985 " Standard for test methods of longterm performance and durability of ordinary concrete " (Minstry of Housing and Urban-Rural Development of People Republic of China (MOHURD)
Standard GBJ82-1985) in two kinds of test methods of seepage-resistant grade method and length of penetration method test；Testing equipment uses country
The standard HS-40 type concrete penetrometer that Bureau of Technical Supervision is assert, this permeameter can pressurize step by step or give and a certain determine
Osmotic pressure force value；Mixing cement concrete according to respectively assembling composition and division in a proportion, the test of comprcssive strength is " common according to GB/T50081-2002
Mechanical performance of concrete test method standard " carry out；Test specimen uses the cube mold molding of 100mm × 100mm × 100mm,
Form removal after 24 hours, 20 DEG C, maintenance under 90% relative humidities.Every kind of match ratio coagulation is determined respectively according to standard-required
Soil 3 days, 7 days, the comprcssive strength of 28 days；
Impermeability test uses two kinds of water pressure test methods of seepage-resistant grade method and length of penetration method to test:
All using a diameter of 175mm of end face, basal diameter is 185mm, and the round platform test specimen of a height of 150mm, after mould molding
Form removal after 24 hours, 20 DEG C, maintenance 28 days under 90% relative humidities.Testing equipment is HS-40 type concrete penetrometer.Examination
The mixing water testing middle employing is preparation artificial seawater, and preparation artificial seawater uses large-scale bucket, stirs preparation the most in advance, saliferous
Amount takes 3.5%NaCl solution, the salinity of basic simulated seawater.After test piece maintenance 28 days, in advance by former HS-40 pump and
Water in pressurized tank drains only, and 3.5%NaCl solution addition HS-40 water injection hole is carried out impermeability test.
After two kinds of tests of impermeability test complete, take a little at section after riving, measure the permeated height at each point, and count
Calculate meansigma methods, process the anti-salt penetration performance drawing each group of test specimen through data, as shown in Figure 1.Data herein process and use
Length of penetration method, length of penetration method is SD 105-82 " concrete for hydraulic structure testing regulations " regulation, and test is measured press liquid and penetrated mixed
The degree of depth of solidifying soil, generally uses a pressurization, and constant voltage is rived after 24 hours test specimen, measures the height that averagely seeps water, and in terms of this
Calculate infiltration coefficient.The computing formula of infiltration coefficient can be expressed as:
SK=MDm 2/2tH
In formula, SKThe relative coefficient of permeability (m/s) measured for length of penetration method；
DmFor average permeated height (m)；
H is the hydraulic pressure (m) represented with water-column；
T is constant voltage elapsed time (s),
M is the water absorption rate of concrete, generally, takes 0.03.
Ooze result of the test according to compression test result and anti-salt, draw concrete crushing strength and the relation oozing saline height
Curve, finds out optimal strength and anti-salt penetration performance test specimen.
Details are as follows for the specific embodiment of the invention:
Contrast Anti-Chloride Ion Penetration and the comprcssive strength of two groups of proportioning of cement concrete A and B.Test specimen A and B joins
Composition and division in a proportion is as shown in table 1 below.Water used is artificial preparation sea water 3.5%NaCl solution；Cement is P.O 42.5 normal silicate water
Mud；Sand is medium sand, modulus of fineness 2.55, stone maximum particle diameter Dmax=25mm, and other materials all meets relevant criterion requirement.
Table 1, proportioning of cement concrete (kg/m3)
Test specimen is poured according to the match ratio shown in table 1.Compressive strength test test specimen uses 100mm × 100mm × 100mm's
Cube mold molding, form removal after 24h, 20 DEG C, maintenance under 90% relative humidities.Determine every respectively according to standard-required
Plant match ratio concrete 3d, the comprcssive strength of 7d, 28d.
Pouring test specimen according to the match ratio shown in table 1, form removal after 24h after impermeability test mould molding, 20 DEG C, 90% is relative
Maintenance 28d under damp condition.Testing equipment is HS-40 type concrete penetrometer.
As a example by using length of penetration method.Often six round platform test specimens of group, constant voltage 24h under 3.0MPa hydraulic pressure, disconnected after riving
Face takes 10 points, measures the permeated height at each point, and calculates meansigma methods.Result of the test is as shown in table 2.
Table 2, test specimen ooze saline height (mm)
After test specimen has poured 28d, carry out compressive strength test, as shown in table 3.
Table 3, test specimen comprcssive strength (mm)
Contrast the table 2 and result of the test of table 3, A assembles the infiltration the most relatively B of composition and division in a proportion material, and to assemble the infiltration of composition and division in a proportion material high
Degree height, 33 (mm) ＞ 21 (mm)；The comprcssive strength that B assembles composition and division in a proportion material is little compared with the comprcssive strength that A assembles composition and division in a proportion material, and 55
(MPa) ＜ 65 (MPa).
Conclude that the Anti-Chloride Ion Penetration of B group material is better than A group material, but the comprcssive strength of B group material is slightly worse
In A group.
Utilize simple, intuitive of the present invention draws the concrete that wherein Anti-Chloride Ion Penetration is best, worst and general
Material.
Claims (4)
1. the new test method for Anti-Penetrability of Cement Concrete and durability, it is characterised in that the method include with
Lower step:
Step (1), by test specimen by mould molding, form removal after 24 hours, maintenance 28 days in testing equipment；
Step (2), in advance the water in testing equipment is drained only, solution is added testing equipment water injection hole and carries out impermeability test；
Step (3), employing seepage-resistant grade method and length of penetration method carry out the impermeability test of test specimen；
Step (4), by after test piece splitting, take sampled point at section；
Step (5), measure the permeated height of each sample point, and calculate meansigma methods, and with this calculation permeability coefficient, infiltration coefficient
Computing formula be expressed as:
SK=MDm 2/2tH
In formula, SKThe relative coefficient of permeability measured for length of penetration method；
DmFor average permeated height；
H is the hydraulic pressure represented with water-column；
T is constant voltage elapsed time,
M is the water absorption rate of concrete；
Draw the anti-salt penetration performance of each group of test specimen；
Step (6), carry out test specimen compressive strength test.
A kind of new test method for Anti-Penetrability of Cement Concrete and durability, its feature
Be, the maintenance in described step (1) 20 DEG C, carry out under 90% relative humidities.
A kind of new test method for Anti-Penetrability of Cement Concrete and durability, its feature
Being, the test specimen in described step (1) is cement, and described cement meets P.O 42.5 Portland cement, modulus of fineness
The medium sand of 2.55, the relevant criterion of stone maximum particle diameter Dmax=25mm.
A kind of new test method for Anti-Penetrability of Cement Concrete and durability, its feature
Being, the solution in described step (2) is for manually preparing sea water, and described artificial preparation sea water is for using large-scale bucket, manually carrying
Front stirring preparation, formulated salinity 3.5%NaCl solution.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610700912.9A CN106323837A (en) | 2016-08-19 | 2016-08-19 | Novel testing method for anti-permeability and durability of cement concrete |
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|---|---|---|---|
| CN201610700912.9A CN106323837A (en) | 2016-08-19 | 2016-08-19 | Novel testing method for anti-permeability and durability of cement concrete |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107356732A (en) * | 2017-09-09 | 2017-11-17 | 芜湖市方圆工程质量检验有限责任公司 | A kind of side amount method of concrete surface layer moisture distribution |
| CN108036985A (en) * | 2017-12-27 | 2018-05-15 | 刘睿洋 | A kind of fracture grouting slurry arteries and veins makes and infiltration coefficient detection device and method |
| CN109060486A (en) * | 2018-10-17 | 2018-12-21 | 河南理工大学 | A kind of concrete plasticity phase difference stress damage test material preparation method |
| CN110308083A (en) * | 2019-07-19 | 2019-10-08 | 长江水利委员会长江科学院 | A kind of test method suitable for low-intensity plastic concrete relative coefficient of permeability |
| CN112014292A (en) * | 2020-08-26 | 2020-12-01 | 广东丰业电力器材有限公司 | Method for testing concrete impermeability |
| CN118520259A (en) * | 2024-07-22 | 2024-08-20 | 湖南湘力检测有限公司 | Rapid detection method for impervious performance of concrete |
| CN118520259B (en) * | 2024-07-22 | 2024-10-18 | 湖南湘力检测有限公司 | Rapid detection method for impervious performance of concrete |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107356732A (en) * | 2017-09-09 | 2017-11-17 | 芜湖市方圆工程质量检验有限责任公司 | A kind of side amount method of concrete surface layer moisture distribution |
| CN108036985A (en) * | 2017-12-27 | 2018-05-15 | 刘睿洋 | A kind of fracture grouting slurry arteries and veins makes and infiltration coefficient detection device and method |
| CN108036985B (en) * | 2017-12-27 | 2023-08-11 | 刘睿洋 | Device and method for manufacturing split grouting slurry vein and detecting permeability coefficient |
| CN109060486A (en) * | 2018-10-17 | 2018-12-21 | 河南理工大学 | A kind of concrete plasticity phase difference stress damage test material preparation method |
| CN110308083A (en) * | 2019-07-19 | 2019-10-08 | 长江水利委员会长江科学院 | A kind of test method suitable for low-intensity plastic concrete relative coefficient of permeability |
| CN110308083B (en) * | 2019-07-19 | 2024-05-17 | 长江水利委员会长江科学院 | Test method suitable for relative permeability coefficient of low-strength plastic concrete |
| CN112014292A (en) * | 2020-08-26 | 2020-12-01 | 广东丰业电力器材有限公司 | Method for testing concrete impermeability |
| CN118520259A (en) * | 2024-07-22 | 2024-08-20 | 湖南湘力检测有限公司 | Rapid detection method for impervious performance of concrete |
| CN118520259B (en) * | 2024-07-22 | 2024-10-18 | 湖南湘力检测有限公司 | Rapid detection method for impervious performance of concrete |
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Application publication date: 20170111 |