Perlite Concrete Mix

Question: I downloaded your publication “Overview of Perlite Concrete” and plan to make test batches from your table of 11 mix designs on page two. The sixth column is labeled “Admix (A&B)” with superscript A assigned to “Air Entrainment” and superscript B assigned to ‘Pozzolith 300-N (fl.ox.).” I do not understand the numbers regarding air entrainment. The first row, for …