Recovery of consistency of concrete using water-reducing admixtures | |
| Author | Vishwanath, Bhedasgaonkar Bhalchandra |
| Call Number | AIT Thesis no. ST-79-05 |
| Subject(s) | Concrete--Testing Concrete--Additives |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | The main purpose of this work is to examine the possibility of using water-reducing admixtures for recovering the consistency of concrete that is lost over a period of time. Two conventional and three super water-reducing admixtures, available commercially, were used for this purpose. They were added in the form in which they were supplied at a certain elapsed time, mainly at 60 min, to regain the consistency lost during that time. Their ability of consistency recovery was tested by changing their dosages widely. The effects of this method on properties of concrete such as consistency, air content, setting time and compressive strength were examined. Degree of consistency loss of various mixtures was also examined over a period of one hour. Following are the main findings : 1) Some kinds of conventional water-reducing admixtures are suitable for recovering the consistency, but careful testing of the performance of these admixtures in concrete is necessary, since some of them exhibit drastic setting retardation and/or air entrainment. 2) Super water-reducing admixtures can be successfully used to restore the consistency to initial level without any harmful effects on concrete pro parties. They greatly improve the properties of fresh concrete. |
| Year | 1979 |
| Type | Thesis |
| School | School of Engineering and Technology |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Structural Engineering (STE) /Former Name = Structural Engineering and Construction (ST) |
| Chairperson(s) | Yamamoto, Yasuhiko ; Pichai Nimityongskul |
| Examination Committee(s) | Kawaguchi, Masahiro |
| Scholarship Donor(s) | The Royal Netherlands Government |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1979 |