Investigation of concrete from Solsvik field station : 4 concrete cores investigated after 16 years of submerged exposure

Abstract

Four concretes from the Solsvik field station all submerged in seawater for 16 years have been investigated. Concretes with 3 different binders were included: Portland cement with 9 % SF, cement with 20 % fly Ash and 4 % SF and cement with 30 % slag and 5 % SF. In addition, a concrete containing light weight aggregate was included. The aim of this study was to investigate how different binders and LWA influence the chloride ingress, focusing on phase changes near the concrete surface. The chloride profiles appeared to be relatively similar for the 3 different binders, while the LWA concrete shows higher chloride concentration near the surface and lower ingress depth compared to the other concretes. One remarkable observation is that the centres of the concrete cores are not fully saturated despite 16 years of submersion. Investigation of concrete from Solsvik field station.

Varige konstruksjoner består, i tillegg til et overordnet implementeringsprosjekt, av fire prosjekter: Prosjekt 1: Tilstandsutvikling bruer Prosjekt 2: Tilstandsutvikling tunneler Prosjekt 3: Fremtidens bruer Prosjekt 4: Fremtidens tunneler