Water Absorption by Bricks (IS 3495 PART II :1992,2011)

WATER ABSORPTION OF BRICKS

OBJECTIVE

         For determination of water absorption of bricks 

REFERENCE STANDARDS

         IS : 3495 (Part-2)-1992,RA 2011

EQUIPMENT & APPARATUS

§  Balance (0-10 kg) 

§  Bricks

§  Buckets

§  Water

                         

                                                     Fig:-Showing Sample Bricks

PROCEDURE

1.      The specimen is dried in a ventilated oven at a temperature of 105 to 115⁰C; till it attains substantially constant mass. The specimen is cooled to room temperature and its weight is recorded (M₁)

2.      The dried specimen is immersed completely in clean water at a room temperature of 27±2⁰C for 24 hours.

3.      The specimen is then removed and any traces of water are wiped out with a damp cloth and the specimen is weighed. The weighing is completed 3min after the specimen has removed from water(M₂) 

                                        Table:-Water absorption of bricks 

S. No.	Dry wt, gms	Wet wt, in gms	WA in gms	% WA	Avg. % WA
1	2707.5	3132	424.5	15.68
2	2559	2995	436	17.04
3	2695	3021	326	12.1	13.19
4	2611	2907	296	11.34
5	2651	2910	259	9.77

CALCULATION

Water absorption, percent by mass after 24 hours immersion in cold water is given by the following formula

PRECAUTIONS

§  Use hand gloves while removing containers from oven after switching off the oven.

§  Thoroughly clean & dry the container before testing.

§  Special care should be taken that no outer air enters when using the balance.

§  To wear safety shoes & apron at the time of test.