PD CEN/TR 16443 is a technical report that describes the background to the revision on EN 450-1:2005+A1:2007, Fly ash for concrete - Part 1: Definition, specifications and conformity criteria.
PD CEN/TR 16443 on fly ash for concrete is useful for:
PD CEN/TR 16443 covers the overview of requirements in EN 450-1 and EN 450-1 and the background for modification of the requirements and test methods in EN 450-1.
PD CEN/TR 16443 outlines the background for the statistical evaluation for assessment procedure by variables and the conformity procedures have also been evaluated, especially the assessment procedure for inspection by variables.
In this background report, it is proved that wider-ranging limits and types of co-combustion materials can be safely applied in the revised EN 450-1. It is also shown that in practice some requirements in EN 450-1 have been proven to be unrealistic. Improvements have been proposed for the definition of fly ash, the loss on ignition, free calcium oxide, reactive silicon dioxide and the limits for phosphate.
CEN/TR 16443:2013