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