Question

concrete floors are laid in small blocks•why

Answer 1

 cement floor is laid in small pieces with gaps in between to allow expansion in summer. As objects expand on heating.

If cement floor is laid without gaps then in summer floor will get cracking...

hope you like this answer....:D

Answer 2

Answer:

           A cement floor is laid in small pieces with gaps in between as objects expand on heating . So, to allow expansion in summer gaps are kept otherwise the cement floor in summer will get cracked.