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 third-point 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 third-point bending test indicated that there was no delamination or crack between layers of SCM and existing structure.