bs en 12620 aggregates for concrete free download
concrete that is exposed, and the limit is set to . 0.5% accordingly.. In such circumstances the limit of masonry impurities may be increased to 9.5% by mass, and lightweight material (floating stony materials only) less than 1000 kg/m3 should also be 0.1% as allowed in BS EN 12620 'Aggregates for concrete'.Table 1 Acceptable RCA Quality