Water Absorption of Brick by 5 hours Boiling Test, Test on Bricks, IS: 5454: 1976

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

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APPARATUS/EQUIPMENT REQUIRED FOR THE TEST:-

• Ventilated drying oven with automatic control capable of maintaining a constant temperature of 110^ᵒC – 115^ᵒC.
• 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.

Ventilated drying oven

IS Code for Water Absorption Test of Brick by 5 Hours Boiling Method :-

• IS: 5454: 1976

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 ^ᵒC and 115 ^ᵒC.
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 (100^ᵒC) 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.

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.