Application of glass fibre-reinforced high strength selfcompacting mortar for rehabilitating marine structures

Abstract

Maintenance and rehabilitation of marine structure is currently indispensable in Vietnam to prolong the service life instead of re-building with a very high cost that cannot be done in the short term. This paper focuses on the rehabilitation work of a beam structure by using glass fiber-reinforced high strength self-compacting mortar or SCM. The process was carried out by simply pouring the fresh SCM onto the surface of the beam that needs to be rehabilitated. The thirdpoint bending test has been used for the evaluation of rehabilitating effectiveness. The experimental results showed that the flexural strength of the rehabilitated beam with SCM application has improved 22% higher than that of the non-rehabilitated ones. In case of the rehabilitated beams that have cracked before, they still sustained a certain sagging and hogging moment after rehabilitation. Visual observation on the cross-section of the rehabilitated beam after the thirdpoint bending test indicated that there was no delamination or crack between layers of SCM and existing structure.