I have a fragment of a white glazed brick.  I am soaking it in water, and
ultimately want to freeze it to see if the absorbed water will fracture the
brick.

1.      I don't notice any bubbles coming up.   Does brick not absorb water
in this fashion?
2.      How long should I wait?
3.      Once the water is absorbed, will freezing actually produce the
desired results?   Or should I just use a hammer?

Christopher