Most dispatchers are pretty valuable and can suggest the most effective blend. For a big slab like ours that may have occasional auto website traffic, we purchased a three,500-lb. blend with five per cent air entrainment. The air entrainment traps microscopic bubbles that help concrete stand up to freezing temperatures. https://bookmarkspy.com/story21644305/concrete-construction-remediation-things-to-know-before-you-buy