| Author | Hoque, Sharida |
| Call Number | AIT Thesis no.ST-06-12 |
| Subject(s) | Portland cement
|
| 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 |
| Series Statement | Thesis ; no. ST-06-12 |
| Abstract | Concrete is the most widely used construction material in the world. Due to its low cost and easy availability it is exposed to various applications and environments. As a result durability of concrete is a major concern for everyone in the construction industry. The key to achieving a strong, durable concrete rests in the careful proportioning and mixing of the ingredients and its subsequent maintenance. But it is difficult to find out about the concrete constituents after the completion of casting. One option that has presented itself in the recent past to determine the in-situ quality of concrete is non destructive testing because it is well documented that all non destructive tests are more or less influenced by the variation in concrete constituents. In this thesis, two non destructive tests have been performed on laboratory specimens to find out the influence of different mix ratios and reinforcement on them. The three parameters that have been studied are: w/c, total aggregate volume and coarse aggregate volume/fine aggregate volume. Ground penetrating radar and ultrasonic pulse velocity machine have been used to find the dielectric constant and surface velocity of concrete respectively. Dielectric constant has been determined for various cover depths with an antenna of 1.5 GHz and surface velocity has been measured at six different positions with transducers of 54 kHz. The results were analyzed to find if any useful relationship exists among the parameters. The output of the results shows that it is possible to determine the w/c and total aggregate volume of concrete using radar. But a field application of ultrasonic method to find any part of mix proportion considered in this study is not possible. Results from a case study shows that equations derived from the results of this study can be used to find the w/c and total aggregate -volume of air dried concrete using ground penetrating radar |
| Year | 2006 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ST-06-12 |
| 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) | Kato, Yoshitaka; |
| Examination Committee(s) | Pichai Nimityongskul;Pennung Warnitchai; |
| Scholarship Donor(s) | AIT Fellowship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2006 |