Journal
OCEAN ENGINEERING
Volume 135, Issue -, Pages 1-10Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.oceaneng.2017.02.020
Keywords
Tropical atoll environment; Ordinary Portland-cement concrete; Coral aggregate concrete; Durability; Chloride diffusion
Funding
- National Key Basic Research Development Plan of China (973 Plan) [2015CB655102]
- National Natural Science Foundation of China [51508272, 51678304]
- Open Research Funds for State Key Laboratory of High Performance Civil Engineering Materials [2015CEM001]
- Fund of the State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact (PLA University of Science and Technology) [DPMEIKF201303]
Ask authors/readers for more resources
A literature investigation and field surveys were made to explore the durability to destruction of Ordinary Portland cement Concrete (OPC) and Coral Aggregate Concrete (CAC) structures in a tropical atoll environment. The surface free Cl- concentrations (C-s) and apparent chloride diffusion coefficients (D-a) were calculated and the calculation method of D-a in a one-dimensional half-infinite-body concrete structure was explored. The results show that the complex and severe environment of tropical atolls corrodes concrete structures badly and that the reinforcement corrosion rate is high. For a concrete structure in a tropical atoll, C-s of OPC is generally smaller than that of CAC. At the same time, the D-a of concrete calculated by the least squares method is the most reliable according to Fick's second law of diffusion. The calculated results demonstrate that the value of D-a is generally smaller in OPC than in CAC. Smaller water-to-binder ratios and higher strengths cause decreases in D-a for CAC. When OPC is not available in tropical atoll projects, the water-to-binder ratio should be decreased and the strength should be enhanced in CAC, which should improve the durability of the concrete effectively and decrease the C-s and D-a of the concrete structure.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available