What is air entrained concrete?
Moreover, where is air entrained concrete used?
The primary use of air-entraining concrete is for freeze-thaw resistance. The air voids provide pressure relief sites during a freeze event, allowing the water inside the concrete to freeze without inducing large internal stresses. Another related use is for deicer-scaling resistance.
One may also ask, how does air entrainment affect concrete? Air entrainment affects compressive strength of concrete and its workability. It increases the workability of concrete without much increase in water-cement ratio. When workability of concrete increases, its compressive strength decreases.
Beside this, what is the difference between air entrained and non air entrained concrete?
The strength of air-entrained concrete depends on the water/cement ratio as it does in non-air-entrained concrete. The water content for an air-entrained mix will be 3 to 5 gallons per cubic yard less than for a non-air-entrained mix having the same slump.
Why is air content in concrete important?
AIR CONTENT AND DURABILITY Entrained air greatly improves the resistance of concrete to damage resulting from freezing and thawing cycles. Microscopic air bubbles produced by admixtures called air-entraining agents relieve pressures caused by water freezing in the small voids present in hardened cement paste.