The relation of the fresh concrete hydration and the content of Chloride ions.

• Main Authors: Tseng Yi-Shien, 曾煜賢
• Other Authors: Liu wen-Chin
• Format: Others
• Language: zh-TW
• Published: 1998
• Online Access: http://ndltd.ncl.edu.tw/handle/70252590242885679658

碩士 === 中正理工學院 === 軍事工程研究所 === 86 === The purpose of this study is to deal with the content of chloride ions in unsetting concrete﹐and it relation to the practical problem that arise in examination the chloride ions in fresh concrete﹐it may influence by concrete aggregate . Setting time and amoung the weight of cement per unit volume . Mix design was on a weight basis of mix ingredients to the weight of cement﹐but different weight salt was soluble in mixed water. The result of bleeding water and chloride ion in the fresh cement motar are variation at beginning of setting time in first one hour﹐but after that time﹐the examination chloride ions approach a constant value﹐it only lower a few then the value of chloride ions in mix water . That mean hydration of aluminates can’t hold chloride ions at cement just beginning hydration . As cement begin setting then mixing motar again﹐this disturbed motar was examined chloride ions again﹐which value less then undisturbed motar about 4%-18%﹐depend on concentration of ions in mixed water .