2020 : DEVELOPMENT OF LOCALLY TAILORED DUCTILE CONCRETE FOR ENHANCING DURABILITY PERFORMANCE OF MARITIME INFRASTRUCTURE
Data Iranata ST., MT., Ph.D
The durability problem is well-known to be one of the challenges which also can lead to significant deterioration of infrastructure. In a marine environment, structures are considerably failure because of corrosion. Corrosion, threaten reinforcement steel during the service life of the building, is chemical and electro-chemical reactions that cause metals to lose their metallic properties. Considering that the bottom of the beam is more easily cracked under normal conditions, the chloride ion can corrode the bottom longitudinal reinforcement through a crack in the bottom, the beam contacted to the marine environment is evaluated. This research is focused on the study and evaluation of corrosion protection to improve durability performance under marine environment. This study is conducted through the vary of experimental test and numerical analyses with the finite element method. A new development material of engineered cementitious composite (ECC) which can be used to improve the long-term durability attached as the patch material. To demonstrate the applicability, three series of evaluations will be included in the test program with different mixture proportions e.g. Specimen of normal concrete designated as specimen control (NC), normal concrete blended with supplementary material using Class F fly ash (SMFA) and engineered cementitious composite. The first to develop mixtures ingredient including mechanical and physical properties. Second to undertake the key durability and corrosion test and third to evaluate the structural behaviour due to different mode of failure. The research can give the improvement of durability and effectiveness of ECC, which exhibit strain-hardening and multiple-cracking behaviour under flexural loading, in retarding the corrosion of steel in reinforced concrete. The collective findings from theoretically estimated steel losses, rapid chloride permeability as well as structural flexural test, it indicates that a new development ECC beam using locally available material has a noticeably higher resistance against reinforcement corrosion.