Air Voids
摘要
Air voids in cement and concrete are small pockets of air that are either intentionally incorporated using air-entraining agents or inadvertently trapped during the mixing process. These air voids play a crucial role in the durability and resilience of concrete, particularly in severe environmental conditions. The primary function of intentionally introduced air voids is to provide space for the expansion of water upon freezing, thus mitigating the risk of frost damage in cold climates. In this respect, the proper management of air content in concrete is vital for structures exposed to freeze-thaw cycles, as it significantly influences their longevity and structural integrity.