الركام والرمل

نوع الركام

Coarse aggregate (crushed stone/gravel) and fine aggregate (natural or crushed sand)

الحجم الأقصى الاسمي

Typically 5–20 mm for coarse aggregate; fine aggregate to 4.75 mm

نسبة الطمي/الطين

Typically limited to ≤3% by mass for concrete-grade sand

الكثافة الظاهرية

Typically 1,400–1,700 kg/m³

المعايير

Typically graded and tested to ASTM C33 or EN 12620 equivalent standards