Cement Test - Soundness

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AIM
To determine the soundness of cement by Le-Chatelier method as per
IS: 4031 (Part 3) - 1988.

APPARATUS

LE-CHATELIER'S TEST APPARATUS

  1. The apparatus for conducting the Le-Chatelier test should conform to IS:5514 - 1969
  2. Balance, whose pemissible variation at a load of 1000g should be +1.0g Water bath 
PROCEDURE 

  1. Place the mould on a glass sheet and fill it with the cement paste formed by gauging cement with 0.78 times the water required to give a paste of standard consistency (see Para 1.2).
  2. Cover the mould with another piece of glass sheet, place a small weight on this covering glass sheet and immediately submerge the whole assembly in water at a temperature of 27 ± 2oC and keep it there for 24hrs.
  3. Measure the distance separating the indicator points to the nearest 0.5mm (say d l ).
  4. Submerge the mould again in water at the temperature prescribed above. Bring the water to boiling point in 25 to 30 minutes and keep it boiling for 3hrs.
  5. Remove the mould from the water, allow it to cool and measure the distance between the indicator points (say d 2 ).
  6. (d 2 – d l) represents the expansion of cement.
REPORTING OF RESULTS

Calculate the mean of the two values to the nearest 0.5mm to represent the expansion of cement.

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