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    Procedure For Rapid Chloride Penetration Test: 1.1 Personnel, Material, and Equipment Requirements

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    Shyam
    This document outlines the procedure for conducting a rapid chloride penetration test according to ASTM C1202-10. It describes: 1) preparing a concrete specimen slice through cutting and conditioning; 2) mounting the specimen in a test cell filled with NaCl and NaOH solutions; 3) applying a 60V potential and recording currents over 6 hours; and 4) calculating the total charge passed to determine chloride ion penetrability based on penetration levels.

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    Procedure For Rapid Chloride Penetration Test: 1.1 Personnel, Material, and Equipment Requirements

    Uploaded by

    Shyam
    77 views3 pages
    This document outlines the procedure for conducting a rapid chloride penetration test according to ASTM C1202-10. It describes: 1) preparing a concrete specimen slice through cutting and conditioning; 2) mounting the specimen in a test cell filled with NaCl and NaOH solutions; 3) applying a 60V potential and recording currents over 6 hours; and 4) calculating the total charge passed to determine chloride ion penetrability based on penetration levels.

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    RCPT

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    This document outlines the procedure for conducting a rapid chloride penetration test according to ASTM C1202-10. It describes: 1) preparing a concrete specimen slice through cutting and conditioning; 2) mounting the specimen in a test cell filled with NaCl and NaOH solutions; 3) applying a 60V potential and recording currents over 6 hours; and 4) calculating the total charge passed to determine chloride ion penetrability based on penetration levels.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    77 views3 pages

    Procedure For Rapid Chloride Penetration Test: 1.1 Personnel, Material, and Equipment Requirements

    Uploaded by

    Shyam
    This document outlines the procedure for conducting a rapid chloride penetration test according to ASTM C1202-10. It describes: 1) preparing a concrete specimen slice through cutting and conditioning; 2) mounting the specimen in a test cell filled with NaCl and NaOH solutions; 3) applying a 60V potential and recording currents over 6 hours; and 4) calculating the total charge passed to determine chloride ion penetrability based on penetration levels.

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    Download as PDF, TXT or read online from Scribd
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    of 3

    PROCEDURE FOR RAPID CHLORIDE

    PENETRATION TEST
    (Adapted from ASTM C1202-10)

    1.1 Personnel, material, and equipment requirements:


     One person  Lab book and pencil
     Vacuum saturation apparatus  Sodium chloride solution 3% by mass in
    distilled water
     Epoxy for coating  Sodium hydroxide solution 0.3 N
     Scale, paper cups, wooden spatulas,  Voltage application and data readout
    brushes etc for coating apparatus
     Specimen cutting equipment
     Movable bed water cooled diamond
    or silicon carbide saw
     Specimen cell sealant

    1.2 Test Specimens


    1.2.1 Slices of 50 mm thickness are cut from 200 mm long, 100 mm diameter cylinders.
    1.2.2 The specimens should be moist cured for at least 28 days in accordance with C192.
    For concrete mixtures containing supplementary cementations materials, at least 56
    days of moist curing is required.
    1.3 Cut the specimen from the concrete cylinder
    Using the water cooled diamond saw, cut a (51±3 mm) slice from the cylinder with
    a cut parallel to the top of the cylinder. Top and bottom 5 mm depth of the cylinder
    is to be discarded.
    1.4 Conditioning the specimen
    1.4.1 Allow the specimen to surface dry in air for at least 1 hour.
    1.4.2 Prepare approximately 10 g of rapid setting coating and brush onto the side surface
    of the specimen. Allow coating to cure.
    1.4.3 Place the specimen in the vacuum desiccator immersed in water. Seal the desiccator
    and start the vacuum pump. Pressure should decrease to less than 50 mm Hg
    within a few minutes. Maintain vacuum for 4hours.
    1.4.4 Soak the specimen under water in the beaker for 18± 2 hours.

    Page 1 of 3
    1.5 Specimen Mounting
    1.5.1 Remove the specimen from water, blow off excess water and transfer specimen to a
    sealed container which will maintain the specimen in 95% or higher relative
    humidity.
    1.5.2 Place a circular vulcanized rubbed gasket in each of the test cell. Insert sample and
    clamp the two halves of the test cell together to seal.
    1.5.3 Fill the side of the cell containing the top surface of the specimen with 3% NaCl
    solution. Connect this side to the negative terminal of the power supply. Fill the
    other side of the cell with 0.3N NaOH solution, which should be connected to the
    positive terminal of the power supply.
    1.5.4 Make electrical connections to voltage application and data readout apparatus as
    appropriate. Turn power supply on, set to 60.0 ± 0.1 V, and record initial current
    reading. Temperature and humidity for which the durability lab is set is maintained
    throughout the test.
    1.6 Taking readings
    1.6.1 Record current at every 30 minutes continuously for 6 hours
    1.6.2 Terminate the test after 6 hours
    1.7 Removing the specimen
    Remove the specimen. Rinse cell thoroughly in tap water, strip out and discard
    residual sealant.
    1.8 Calculation
    1.8.1The following formula, based on the trapezoidal rule, is used to calculate the charge
    passed in coulombs.

    Q = charge passed (coulombs),


    Io = current (amperes) immediately after voltage is applied, and
    It = current (amperes) at t min after voltage is applied.

    1.8.2 Since the specimen diameter is other than 3.75 in. (95bmm), the value for total
    charge passed established in the previous equation is to be adjusted by multiplying
    the value by the ratio of the cross-sectional areas of the standard and the actual
    specimens. That is
    2
     3.75 
    Where: Qs = Qx ×  
     x 
    Qs = charge passed (coulombs) through a 3.75-in. (95-mm) diameter specimen,
    Qx = charge passed (coulombs) through x in. diameter specimen, and
    x = diameter (in.) of the nonstandard specimen.

    Page 2 of 3
    1.9 Interpretation of Results
    1.9.1 Based on table given below, evaluate the test results.

    TABLE 1: Chloride Ion Penetrability Based on Charge Passed


    Charge Passed (coulombs) Chloride Ion Penetrability
    >4,000 High
    2,000–4,000 Moderate
    1,000–2,000 Low
    100–1,000 Very Low
    <100 Negligible

    1.10 Reporting
    The results should be reported with the following details
    1. Source of core or cylinder, in terms of the particular location the core or cylinder
    represents,
    2. Identification number of core or cylinder and specimen,
    3. Location of specimen within core or cylinder,
    4. Type of concrete, including binder type, water cement ratio, and other relevant data
    supplied with samples
    5. Description of specimen, including presence and location of reinforcing steel, presence
    and thickness of overlay, and presence and thickness of surface treatment,
    6. Curing history of specimen; indicate moist curing, extended moist curing, or accelerated
    moist curing as defined in this test method, as applicable,
    7. Unusual specimen preparation, for example, removal of surface treatment,
    8. Test results, reported as the total charge passed over the test period and
    9. The qualitative chloride ion penetrability equivalent to the calculated charge passed (from
    Table 1).

    Page 3 of 3

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