Journal
CEMENT AND CONCRETE RESEARCH
Volume 140, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.cemconres.2020.106292
Keywords
Engineered cementitious composite (ECC); Strain-hardening cementitious composite (SHCC); Seawater; Sea-sand; Non-corrosive reinforcement; Crack characteristics; Crack assessment; Probabilistic modeling
Funding
- Innovation Technology Fund of the Hong Kong Government [ITS/077/18FX]
- Hong Kong Research Grants Council [T22-502/18-R]
- Hong Kong Polytechnic University [1-BBWE, YW4K]
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This study assesses and models the crack characteristics of Seawater sea-sand Engineered Cementitious Composites (SS-ECC), exploring the influence of sea-sand size, fiber length, and fiber dosage. Proposed methods, including a five-dimensional representation and a probabilistic model, facilitate the design of SS-ECC in marine and coastal structures by considering crack characteristics and mechanical properties comprehensively.
Seawater sea-sand Engineered Cementitious Composites (SS-ECC) is a new version of ECC for marine constructions facing the scarcity of freshwater and river/manufactured sand. This study aims to assess and model the crack characteristics of SS-ECC, which are critical for its applications with non-corrosive reinforcements. The influence of sea-sand size, fiber length and fiber dosage on the crack characteristics of SS-ECC was explored. A five-dimensional representation was proposed to assess the overall performance of SS-ECC, by comprehensively considering both the crack characteristics (i.e., crack width and its variation) and the mechanical properties (i.e., compressive and tensile properties). A probabilistic model was also proposed to describe the stochastic nature and evolution of crack width, and it can be used to estimate the critical tensile strain on SS-ECC for a given crack-width limit and cumulative probability. The findings and proposed methods can facilitate the design of SS-ECC in marine and coastal structures.
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