| Author | Siam Suwathanangkul |
| Call Number | AIT Thesis no.ST-07-11 |
| Subject(s) | Concrete beams
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technololgy |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. ST-07-11 |
| Abstract | Corrosion of reinforcing steel is a major problem by deterioration of reinforced concrete structures. This research work simulates corrosion situation to reinforcing steel in concrete. Determine effects of reinforcement corrosion on load bearing capacity, crack pattern etc of corroded reinforced concrete structures. The experimental framework consists of rate of corrosion test specimen and total of 11 beams in three categories, reference beam, nonrepaired beam and repaired beam. In case of non-repaired and repaired beam, accelerated galvanic process is apply to inducing corrosion at main steel bars at inside, outside loading span and full span. Targeted degree of corrosion for all corroded beams is 2.5% by weight to achieving former accelerated state based on JSCE Standards. After inducing corrosion, reinforcing steel bars inside of non-repaired beam are moved out to find weight loss and repair all repaired beams by patching repair method with two different types of repairing material. polymer cementitious repair mortar and epoxy bonding paste are using to repair deteriorated beams in this research work. The experimental results show that predicted weight loss from Faraday's law are very close to actual weight loss from rate of corrosion test specimen and corroded beams also. Faraday's law can be applied to accelerated galvanic process for all corroded beams in this research work. More over, load bearing capacities of corroded concrete beams are significantly influenced by reinforcement corrosion. All of corroded control beam decreased overall capacities, such as higher deflection and decreased yielding and ultimate load capacity etc. Especially, in case of repaired beams, epoxy bonding paste has been increase load bearing capacity at higher rate and reduced overall deflection of all corroded beam. Polymer modified cementitious repair mortar has been increase load bearing capacity of corroded beam also but can not reached to load bearing capacity of normal beam. A main cause of higher load bearing capacity of corroded beams repair with epoxy is very high tensile strength of this type of repairing material. Its help on tension part of repaired beams. |
| Year | 2007 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ST-07-11 |
| 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;Raktipong Sahamitmongkol; |
| Examination Committee(s) | Pennung Warnitchai; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2007 |