Abstract
Fresh concrete generally contains bleeding water (free water) which is considered to deteriorate the quality of reinforced concrete structures. Therefore, it is very important to clarify the behavior of free water in evaluating the behavior of bleeding and segregation, and the quality of reinforced concrete structures. Main purpose of the present study is to examine the behavior of free water in fresh concrete and in various kinds of dewatered concrete. In this report, the behavior of free water in bleeding and the dewatered mechanism are discussed, based on series of newly proposed visualization tests on the permeable form dewatering, press dewatering and vacuum processing methods as well as the bleeding.
