


Flow Diagram The flow diagram below shows the major elements of the production of this product, as it is currently modeled ... mining and grinding. Table 1: Asphalt Shingle Constituents . Constituent Kg/m2 (lb/square)* ... Granules 3.4 (70) 25 % Back surfacing (sand and talc) 1.0 (19.6) 7 % Total 14 (280) 100 % *One square is equivalent to 9.29 ...