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Title: A Dual-Functional Intervention Method for Sea-Sand Concrete Structure

Author(s): Ji-Hua Zhu, Zhi Wang, Wanqian Li, Hanshi Liang, Zhiwen Zeng, Mei-ni Su, Dawang Li, and Feng Xing

Publication: Symposium Paper

Volume: 330


Appears on pages(s): 219-226

Keywords: C-FRCM; corrosion; impressed current cathodic protection (ICCP); reinforced concrete; sea sand; simply supported beams; structural strengthening.

DOI: 10.14359/51711253

Date: 9/26/2018

With the rapid development of economy and infrastructure, more and more new reinforced concrete (RC) structures are being constructed every day, with the increasing demand for raw materials, such as sands, cement and aggregates. One solution to materials can cause resource shortage is to use sea sand to replace river sand. However, sea sand concrete might cause corrosion of steel re-bars in RC structures, thus resulting in structure deterioration. This study proposes a new dual-functional method to retrofit the sea-sand RC structures by using the carbon - fiber reinforced cementitious matrix (C-FRCM). The C-FRCM composite, consists of carbon fiber mesh and inorganic cementitious material, is both the anodic material in the impressed current cathodic protection process as well as the structural strengthening material. The proposed technique has been shown to be effective in retarding the corrosion of re-bars, and maintaining the loading capacity of the corroded specimens.