Table 4: Average percentage of coarse aggregates in 10 concrete cores Quartzite* 61.8% Acid to Intermediate Volcanics* 13.7% Quartz wacke / Greywacke* 13.3% Chert* 3.9% Metadolerite 2.8% Limestones 2.1% Basalt 1.6% Quartz Mica Schist 0.8% Total Reactive Constituents 93.5 The minerals / rock types with asterisk sign are potentially reactive in terms of ASR.