Does concrete need expansion joints?

From http://www.swimmingpoolsteve.com/page... - Steve talks about the difference between control joints and expansion joints in concrete slabs and whether you need to have them or not.

• #howto_style
• #concrete
• #concrete_slab
• #expansion
• #expansion_joint
• #control
• #control_joint
• #joint
• #bond
• #bond_break
• #bond_breaker
• #need_expansion_joints
• #need_control_joints
• #control_cracks
• #control_cracking
• #concrete_deck
• #cement
• #how_to
• #swimming_pool_steve
• #wwwswimmingpoolstevecom