BS EN
12407:2007 Natural stone test methods – Petrographic examination
BS
EN 12620:2002 Aggregates for concrete
BS
EN 932-3 Tests for general properties of aggregates. Part
3. Procedure & terminology for simplified petrographic
description
Petrographic
analysis of roofing slate (BSEN12326-2 Slate and stone products
for discontinuous roofing and cladding - test methods)
