SMARTBLOCK® 1200: load-bearing sound-insulating block
SMARTBLOCK® 1200 is the heaviest density in the range, available from 6 to 40 cm. It has the same compressive strength as the 900 (5.5 N/mm²) and more mass: the calculated sound reduction index starts at 45 dB with just 6 cm and reaches 56 dB with 40 cm. Equivalent conductivity is 0.2289 W/mK.
1200kg/m³- Equivalent λ
- 0.2289 W/mK
- Compressive strength
- 5.50 N/mm²
- Wall U
- 2.148–0.513 W/m²K
- Calculated Rw
- 45–56 dB
- Reaction to fire
- A2-s1,d0 · EI 240
Thicknesses and wall data
Wall with 1.5 cm of traditional plaster on each side. Block height 20 cm.
| Code | Size L×W×H | Weight | Pcs/m² | U W/m²K | R m²K/W | Time lag | Rw dB | Fire | Sheet |
|---|---|---|---|---|---|---|---|---|---|
| B.06.1200 | 1000 × 60 × 200 mm | 14.4 kg | 5 | 2.148 | 0.465 | 3.4 h | 45 | — | PDF IT |
| B.10.1200 | 500 × 100 × 200 mm | 12 kg | 10 | 1.562 | 0.640 | 5.9 h | 46 | EI 90 | PDF IT |
| B.15.1200 | 500 × 150 × 200 mm | 18 kg | 10 | 1.165 | 0.859 | 9.0 h | 48 | EI 120 | PDF IT |
| B.20.1200 | 500 × 200 × 200 mm | 24 kg | 10 | 0.928 | 1.077 | 12.1 h | 50 | EI 180 | PDF IT |
| B.25.1200 | 250 × 250 × 200 mm | 15 kg | 20 | 0.772 | 1.296 | 15.2 h | 52 | EI 240 | PDF IT |
| B.33.1200 | 250 × 330 × 200 mm | 19.8 kg | 20 | 0.608 | 1.645 | 20.2 h | 55 | EI 240 | PDF IT |
| B.40.1200 | 250 × 400 × 200 mm | 24 kg | 20 | 0.513 | 1.951 | 24.5 h | 56 | EI 240 | PDF IT |
U, R, time lag and Rw: ESB catalogue 11/2022. Fire resistance classes of the range for walls up to 4 m high. Rw calculated, not measured. ESB data sheets from 2014. Where no English version exists, the Italian sheet is linked.
Uses by thickness
- 6 · 10 cmInternal partitions, external cavity walls.
- 15 · 20 cmLoad-bearing masonry in seismic zone 4 and in non-seismic areas, as well as cavity walls and partitions.
- 25 · 33 · 40 cmLoad-bearing masonry, including in seismic zones.
Specification text
Choose the item and copy the text into your bill of quantities.
Masonry built with the SMARTBLOCK® building system by ESB S.r.l., consisting of solid blocks for walls to be plastered, suitable for internal and external walls, CE-marked to EN 771-3, category II, made of cement-based concrete with a super-lightweight insulating aggregate of virgin expanded polystyrene beads of controlled density and graded size (Ø 3–6 mm), treated during production for full workability with the hydraulic binder. Item B.33.1200: nominal dimensions L 250 × W 330 × H 200 mm, tolerance D1, density 1200 kg/m³ ±10%, equivalent thermal conductivity 0.2289 W/mK, reaction to fire class A2-s1,d0 (EN 13501-1). The wall, plastered with 1.5 cm on both sides, will have a thermal transmittance U of 0.608 W/m²K and a calculated sound reduction index Rw of 55 dB. Laid with Malta Block 600 thermal mortar (EN 998-2, M2.5) with staggered joints. Including the forming of jambs and lintels, any special pieces, anchoring to the structure and reinforcement as required by the designer.
The other densities
- 300The most insulating density, for single-layer infill walls.
- 450High insulation, with more mass and a longer time lag.
- 600A balance of insulation, strength and acoustics.
- 750The first sound-insulating density: partitions and walls between units.
- 900Load-bearing from 15 cm, with thermal and sound insulation.
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