ASTM C1202 PDF
ASTM C Rapid Chloride Permeability Test. T E C H N I C A L. B U L L E T I N T B – 0 1 0 0. Concrete. Introduction. This test method was originally developed. This test method (ASTM C ) covers the determination of the electrical conductance of concrete to provide a rapid indication of its resistance to the. This standard is issued under the fixed designation C; the number immediately 1 This test method is under the jurisdiction of ASTM Committee C09 on.
|Published (Last):||12 September 2015|
|PDF File Size:||12.90 Mb|
|ePub File Size:||11.48 Mb|
|Price:||Free* [*Free Regsitration Required]|
Work Item s – proposed revisions of this aastm. As was discussed on page 90, different ranges of bulk electrical conductivity correspond to different ranges of charge passed in accordance with ASTM C A separate program is used for this test. This includes specimens with actual diameters ranging from 95 to mm.
The cell is sealed by tightening the four corner bolts, which squeezes the gaskets against the specimen.
As discussed on page 88, electrical conductivity is related to the diffusion coefficient. Correlations to Chloride Diffusion Coefficient As was discussed on page 88, there is a theoretical relationship between the chloride diffusion coefficient and electrical conductivity.
An electrical potential of 60 VDC is applied across the cell. When using c11202 test for determining acceptability of concrete mixtures, statistically-based criteria and test age for prequalification, or for acceptance based on jobsite samples, should be stated in project specifications. The cells are turned off. The cells are supplied with PRB gaskets, unless otherwise specified.
c120 The voltage is set to 60 V and the v1202 are turned on. The chloride diffusion coefficient can be determined directly by profile grinding pg. For specimens with diameters less than 95 mm, particular care must be taken in coating and mounting the specimens to ensure that the conductive solutions are able to contact the entire end areas during the test. Specimens from 5 concrete mixtures were subjected to 59 days of standard curing and then subjected to 16 months of immersion in the NaCl solution.
Link to Active This link will always route to the current Active version of the standard. After the test d1202 completed, the specimen is split, and the chloride ion penetration is measured by spraying the split surface with a 0. From the penetration depth and test conditions, the chloride ion migration coefficient is calculated.
Testing up to 8 cells simultaneously Voltage settings of 5 to 60 VDC in 5 V increments Programmable testing time as required Temperature measurement and recording Cyclic testing option for effect of curing duration Measure concrete conductivity at 60 VDC in 1 min Predicted 6-h Coulomb value every 5 min Documentation of each test result A complete system composed of coring and slicing equipment, vacuum desiccator, vacuum pump, watertight test cells, microprocessor power supply, and software are presented below.
In most cases the electrical conductance results have shown good correlation with chloride ponding tests, such as AASHTO T, on companion slabs cast from the same concrete mixtures Refs 1- 5.
The following gaskets are available for different specimen diameters:. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations c2102 to use.
Also shown is the relationship between the charge passed and the 5-minute electrical conductivity measured by the ASTM C test.
Customized labels can be attached to each test for complete project documentation. Powered by WordPress Theme Designed by: The following gaskets are available for different specimen diameters: The bulk electrical conductivity is calculated using Eq.
A 30 VDC potential is applied across the specimen, and the initial current is measured. Referenced Documents purchase separately The documents listed below are referenced within the subject standard aztm are not provided as part of the standard. At the conclusion of the test, the specimen is split in half, the surface is sprayed with a 0. First the cells are set atm for a voltage of 30 V, the cells are turned on and the initial current is recorded.
Proove’it | GERMANN
Test results are corrected for a standard specimen diameter of 95 mm. When this method is used for mixture qualification and acceptance testing, it is imperative that the curing procedures and the age at time of testing be clearly specified. The average chloride penetration, the applied voltage, average temperature of the sodium hydroxide solution, test duration, and specimen thickness are used to calculate the non-steady-state migration coefficient.
The last plot lower right also shows the theoretical relationship. Based on the initial current, the operator selects the test voltage and test duration in accordance with recommendations in NT Build The anticipated exposure conditions and time before a structure will be put into service should be considered. By measuring the current passing through a saturated concrete specimen and determining the bulk conductivity in accordance with ASTM C The area under the curve of current versus time is determined, which represents the total charge or Coulombs passed across the specimen.
Examples of such correlations are discussed in Refs 1- 5. The more permeable is the concrete, the more negative ions will migrate through the specimen, and a higher current will be measured. The results from this test on some such concretes indicate low resistance to chloride ion penetration, while day chloride ponding tests on companion slabs show a higher resistance.
A complete system composed of coring and slicing equipment, vacuum desiccator, vacuum pump, watertight test cells, microprocessor power supply, and software are presented below. The following plots show the correlations between various test results. The PR cell is the standard cell.
Historical Version s – view previous versions of standard. As was discussed on page 88, there is a theoretical relationship between the chloride diffusion coefficient and electrical conductivity. It is important to maintain a constant temperature in the solutions in the reservoirs.
The PR verification unit is used to verify that the microprocessor controlled power supply is working properly.