Durability of MFS-Slag Concrete

By incorporation of MFS-slag in concrete mixtures at high cement and/or aggregate replacement levels, DUSC strives for:

(1) maximum residue valorisation and avoidance of waste disposal, and

(2) more durable and sustainable reinforced concrete structures, with a low carbon footprint, high service life and good recyclability.

MFS-slag based concrete (‘MFS-concrete’) is targeted which can be used as ready-mix concrete for structural applications, such as beams, columns and slabs of buildings and infrastructure.

The project deals with two different cement replacement levels. On the one hand, MFS-slag will be used as supplementary cementitious material to replace at least 25% of Ordinary Portland Cement (OPC). On the other hand, MFS-slag will be used at high (70%) OPC replacement levels by the additional use of an activator (or accelerator). These new concrete types are denoted ‘MFS-CS’ and ‘MFS-CA’, respectively.

MFS-CS is envisaged for short term commercialisation, while MFS-CA targets medium-to-long term commercialisation in view of continuously increasing market demands for eco-efficiency. In addition to the replacement of the cement, both types also apply coarse aggregate replacement.