| Author | Bui, Khanh Van |
| Call Number | AIT Thesis no. ST-94-1 |
| Subject(s) | Aggregates (Building materials)
|
| Note | A thesis submitted in partial fulfillment of the requirement
for the Degree of Master of Engineering, School of Civil Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | This study is to propose a concept for designing the mix proportions of vibration-free concrete
having high durability and economic efficiency, and to give an example of mix proportions
designed according to the proposed concept. The proposed concept considers the fresh vibrationfree concrete to consist of solid and liquid phases. This study focused mainly on the solid phase
that includes fine and coarse aggregates. The proposed mix design concept for aggregate phase
bases on aggregate void-smface area theory in combination with blocking criteria that relate to
ratio between reinforcement clear spacing and average aggregate fraction diameter, and paste
properties. This study proposed the method for calculating an average distance between aggregate
particle smfaces, the void model and blocking cdterion's concept that are useful in designing the
highly durable vibration-free concrete. The computed results verified by experimental
investigations in this study indicated that the larger average distances between aggregate particle
surfaces that render the smaller inter particle stress give the better deformability and filling ability
of highly durable vibration-free concrete. The analysis and experimental investigation also showed
that for each type of fine and coarse aggregates and a certain paste volume; there is an optimum
gravel to total aggregate ratio of binary mixture that produces the maximum average distance
between aggregate particle surfaces and the best filling ability of the fresh concrete. The study
also gave the examples of mix design of highly durable vibration-free concrete having high
durability and economic efficiency, as the tested specimens were of high compressive strength and
low drying shrinkage, and since they contained lower paste volume and superplasticizer dosage in
comparison with mixtw-es prepared according a simple mix design method presented by founders
of high performance concrete (without vibration). Generally, the experimental investigation
proved that the proposed mix design concept in this study is useful in perf01ming highly
economic and durable vibration-free concrete. |
| Year | 1994 |
| Type | Thesis |
| School | School of Civil Engineering |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Structural Engineering (STE) /Former Name = Structural Engineering and Construction (ST) |
| Chairperson(s) | Aoyagi, Yukio ; Somnuk Tangtermsirikul
|
| Examination Committee(s) | Pichai Nimityongskul ;Pennung Warnitchai
|
| Scholarship Donor(s) | The Government of Thailand |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1994 |