2026-10-21
MU5.0/700/H18, tested λ 0.15 W/(m·K), heat storage S 4.18. A load-bearing block that also insulates — CNAS certified.
Across the Gulf, air conditioning is the single biggest draw on the grid in summer — in the hottest months it can be half of peak demand. The cheapest kilowatt to save is the one a wall stops turning into heat. That is why insulation blocks with real load-bearing strength are gaining ground over cladding-plus-insulation systems.
Ceramsite is expanded clay — raw clay is sintered in a rotary kiln at around 1200°C until it bloats into a hard, ceramic, closed-cell granule. It is light because of the air pockets, and strong because the surface is vitrified. Mixed with cement and foam, it produces a block that carries load and insulates at the same time.
The load-bearing point matters. Our ceramsite foam concrete block is graded MU5.0 / 700 / H18 (GB/T 36534-2018); tested cube strength averaged 6.0 MPa, minimum 5.9 MPa. That is structural-wall territory, not a filler product — it can form the bearing leaf of a low-rise wall and take floor and roof loads directly.
On insulation, the dry thermal conductivity is 0.15 W/(m·K) — tested, not quoted. That is roughly 10x better than dense concrete and in the same range as many dedicated insulation materials. A 240 mm ceramsite wall works as a single-leaf insulated wall without an external foam layer.
The less obvious number is the heat storage coefficient: 4.18 W/(m²·K) tested, against a requirement of ≥2.80. High S means the wall absorbs heat during the day and releases it slowly at night instead of letting it spike the room temperature — it smooths the temperature curve and cuts the number of air-conditioning start-ups, which is where electricity actually gets wasted.
Weight stays low: dry density 696 kg/m³. Compared with clay brick at 1,600–2,000 kg/m³, a ceramsite wall cuts foundation and frame loads, and a mason lays more blocks per day.
Gulf coastal projects sit in heat, humidity and occasional rain. The CNAS test sheet covers the checks that matter here: frost resistance (mass loss 1.6%, frozen strength 5.4 MPa), dry shrinkage 0.37 mm/m, water absorption 21%, softening coefficient 0.92, and radioactivity well inside limits. All pass.
Data: MU5.0/700/H18, 600×240×240 mm, λ 0.15 W/(m·K), S 4.18. Shipped FCL from Ningbo with CNAS test reports. If your consultant is comparing insulation systems, send them this sheet — the numbers are on the table.
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