WATER ABSORPTION OF BRICK BY 5 HOURS BOILING TEST, TEST ON BRICKS, IS: 5454: 1976


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By the help of this blog you can determine the water absorption of brick by 5 hours boiling test easily. So please continue to the end & keep your love and support on me.

APPARATUS/EQUIPMENT REQUIRED FOR THE TEST:-
  • Ventilated drying oven with automatic control capable of maintaining a constant temperature of 110C – 115C.
  • Water tank, provided with a grid to ensure free circulation of water between masonry units and the bottom of the tank.
  • Weighing Balance to an accuracy of 0.1% of the mass of the specimen.

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Ventilated drying oven

PROCEDURE OF THE TEST :-
  1. First of all, take 10 bricks sampled in accordance with this test procedure.
  2. Dry the specimens to constant mass in the oven at a temperature of between 110 C and 115 C.
  3. Now cool the specimens to room temperature and weigh each specimen to an accuracy of 0.1% of its mass. Note down it as M1.
  4. Place the 10 specimens in a single layer in a tank of water immediately after weighing, so that the water can circulate freely on all sides of them. Leave a space of about 10 mm between bricks and the sides of the tank.
  5. Heat the water to boiling point (100C) in approximately 1 h.
  6. Boil theme for 5 hour continuously, and then quit it for cooling to room temperature by natural loss of heat for not less than 16 h or more than 19 h.
  7. Take the specimens, wipe off the surface water with a damp cloth and weigh. When wiping perforated bricks, shake them to expel water that might otherwise be left in the perforations.
  8. Weigh any one of the specimens within 2 min after its removal from the water. Note down it as M2.

Table:- Water Absorption of Brick


Bricks


M1


M2

Water Absorption (%)

Average Water Absorption (%)
1




2



3



4



5



6



7



8



9



10




CALCULATION OF WATER ABSORPTION :-
The water absorbed by each specimen 'A' is expressed as a percentage of the dry mass using the following expression.
2020/04/determination-of-water-absorption-of-brick-by-5h-boiling-test.html

Calculate the average of the water absorption’s of the 10 specimens to the nearest 0.1% and report it.

Note:- Water Absorption shall not be more than 10 percent by weight up to grade A, 12 percent by weight up to grade B and 16 percent by weight for grade C.