Variation of Air Content in the Construction Process and Functions of Air Voids in Concrete

Abstract

This paper presents part of the interim report of the Technical Committee on Functions and Techniques for Controlling of Air Voids in Concrete, which conducts activities for a comprehensive survey of the functions and effects of air voids in concrete, and techniques for the control and management of air voids, through both a survey of the existing literature and experimental study. This paper provides in particular an organized survey of the current state of knowledge regarding the effect of concrete component materials and concreting methods on the air-void system of fresh concrete and hardened concrete. Further, it presents the findings of an experimental study on the effects of transportation and vibration compaction on the air content of fresh concrete.