Ceramsite Foam Concrete Blocks

CNAS-tested ceramsite foam concrete blocks, grade MU5.0 / 700 / H18 (GB/T 36534-2018)

Technical Specifications

Standard	GB/T 36534-2018 (current national recommended standard)
Product code	CFB (cement binder + ceramsite aggregate + fly ash + foam)
Production grade	MU5.0 / 700 / H18 — CNAS type test passed (report available on request)
Standard size	600×240×240 mm (other sizes: L 600/390, W 100–300, H 200–300 mm)
Materials	Cement (GB 175), expanded ceramsite (40–50% by volume, GB/T 17431.1), fly ash (GB/T 1596), foam agent (JC/T 2199)
Strength grades available	MU2.5 / MU3.5 / MU5.0 / MU7.5 (cube avg 2.5–7.5 MPa; min 2.0–6.0 MPa)
Dry density grades	600 / 700 / 800 / 900 (550–950 kg/m³)
Thermal / heat storage grades	H12 – H20 (λ dry 0.12–0.20 W/(m·K); heat storage S 2.20–4.18 W/(m²·K))
Dimensional tolerance	L: ±3 mm; B: ±2 mm; H: ±2 mm
Frost resistance	Mass loss ≤ 5%; frozen strength meets grade requirement
Dry shrinkage	≤ 0.50 mm/m (standard method)
Volumetric water absorption	≤ 25%
Softening / carbonation coefficient	≥ 0.85 / ≥ 0.85
Radioactivity	Meets GB 6566 (IRa 0.1, Ir 0.4) — non-hazardous
Application	Industrial & civil building walls, thermal & acoustic insulation

Parameter	Standard requirement	Tested result	Conclusion
Specification	—	600×240×240 mm	—
Grade	—	MU5.0 / 700 / H18	—
Dry density	600–950 kg/m³	696 kg/m³ (grade 700)	Pass
Cube strength avg / min	≥5.0 / ≥4.0 MPa	6.0 / 5.9 MPa	Pass
Thermal conductivity λ dry	≤0.18 W/(m·K)	0.15 W/(m·K)	Pass
Heat storage coefficient S	≥2.80 W/(m²·K)	4.18 W/(m²·K)	Pass
Frost resistance: mass loss / frozen strength	≤5.0% / ≥4.0 MPa	1.6% / 5.4 MPa	Pass
Dry shrinkage	≤0.50 mm/m	0.37 mm/m	Pass
Volumetric water absorption	≤25%	21%	Pass
Softening coefficient	≥0.85	0.92	Pass
Radioactivity: IRa / Ir	≤1.0 / ≤1.0	0.1 / 0.4	Pass