Foam concrete body with flame-retardant XPS insulation core (GB/T 29060-2012)
| Standard | GB/T 29060-2012 Composite Insulation Bricks & Blocks; JC/T 2556-2019 Self-insulating Foam Concrete Blocks |
|---|---|
| Structure | Foam concrete outer body + flame-retardant XPS (extruded polystyrene) insulation core — sandwich |
| Compressive strength | MU5.0 (load-bearing partition walls) |
| Bond strength | ≥156 kPa (cement mortar bond) |
| Bulk density | 700 kg/m³ |
| Heat transfer coefficient K | 0.35 W/(m²·K) — meets national 75% energy-saving standard |
| Fire resistance | A1 non-combustible; inorganic foam concrete body + flame-retardant XPS core |
| Closed pore structure | ~90% closed pores — low water absorption, moisture-proof, anti-leakage |
| Service life | Same as the building (integrated structure + insulation; no external insulation layer to peel off) |
| Construction speed | ~30% faster than traditional wall + external insulation; masonry same as ordinary blocks |
| Surface finishing | Cement-based body bonds directly with mortar — no interface agent needed |
| Fixing | Nails and expansion bolts hold well (unlike pure AAC) |
| Application | Residential & affordable housing, passive houses, prefab frame infill walls; schools, hospitals, industrial parks; severe-cold / hot-summer cold-winter zones |
| Parameter | Value |
|---|---|
| Compressive strength | MU5.0 |
| Bond (connection) strength | ≥156 kPa |
| Bulk (apparent) density | 700 kg/m³ |
| Heat transfer coefficient K | 0.35 W/(m²·K) |
| Fire rating | A1 (non-combustible) |
| Closed pores | ~90% |
Same structural wall with insulation built in — compare against ALC panels, clay bricks and AAC blocks.
| Property | ALC Panel | Clay / Shale Brick | AAC Block | Composite Self-insulating Block |
|---|---|---|---|---|
| Compressive strength (MPa) | 5 | 10 | 5 | 5 |
| Water resistance (wet season) | Damp returns | Damp returns | Damp returns | Excellent — no damp return |
| Thermal insulation | Average | Poor | Average | Meets national 75%+ energy-saving standard |
| Waterproofing | Pores partly connected, fair | Connected pores, not waterproof | Pores partly connected, fair | Independent cement-layer pores; waterproof, insulation layer even more waterproof |
| Weight | Light | Heavy | Light | Light |
| Fixing nails / bolts | Poor nail & bolt hold | Nails & bolts usable | Poor nail & bolt hold | Nails & expansion bolts usable |
| Long-term maintenance | Insulation life ≤20 yrs, high maintenance cost | Same as left | Same as left | Same life as the building; short schedule, eco-friendly, comfortable, durable finish |
| Rendering / plastering | Needs bonding agent, high water absorption, delaminates | Good | Needs bonding agent, high water absorption, delaminates | Cement-based, same material as mortar; no bonding agent needed, strong bond |
| Construction time | Waterproof + insulation layer, long schedule | Same as left | Same as left | No separate waterproof/insulation work, short schedule |
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