Civil Engineering Reference
In-Depth Information
Figure 12.
Strength development of high strength flowing concrete in the presence of an
SMF-Type superplasticizer.
5.0
AIR-ENTRAINING AGENTS
Air-entrainment
is the process whereby many small air bubbles are
incorporated into concrete. Air-entrainment is essential for increasing the
durability of concrete exposed to freeze thaw conditions. Air-entrainment
improves workability of concrete and also decreases bleeding and segrega-
tion. Salts of wood resins, synthetic detergents, salts of sulfonated lignin,
salts of petroleum acids, salts of proteinaceous materials, fatty and resinous
