Can I use 20 MPa concrete with Dincel in lieu of 40 MPa to cater for exposure to weather conditions?

Yes - Australian Standard AS 3600 requires engineers to specify a minimum of 40 MPa concrete for surfaces exposed to weather if the structure is located within 1km of the coastal zone. The reason for this is to achieve low permeability concrete and minimise the risk of concrete spalling (concrete cancer). The waterproof Dincel system provides superior protection to concrete by its permanent polymer skin which eliminates the need for higher grade concrete above 20 MPa for durability purposes.