Foam concrete, also known as foamed concrete, foamcrete, cellular lightweight concrete or reduced density concrete, is defined as a cement based slurry, with a minimum of 20% (per volume) foam entrained into the plastic mortar.[1] As mostly no coarse aggregate is used for production of foam concrete the correct term would be called mortar instead of concrete. Sometimes it may be called as "foamed cement" or "foam cement" because of mixture of only Cement & Foam without any fine aggregate. The density of foam concrete usually varies from 150 kg/m³ to 400 kg/ m³. The density is normally controlled by substituting fully or part of the fine aggregate with foam.
| Nr. | Features | 20/80 | 30/50 | 35/501 | Investigation method |
|---|---|---|---|---|---|
| 1 | Status when water is applied | solid gray mass without particles and mechanical contamination | easy to see foam plastic pellets | ZUAT 15/VIII. 14 2000 | |
| 2 | Mixed mortar volume g/cm3 | 0.4±5% | 0.5±5% | 0.6±5% | PN-85/B-04500 |
| 3 | Consistency cm: | ||||
| Partition cone | 16±1 | 19±1 | 19±1 | PN-EN 1015-3:2000 | |
| Immersion of a tool | 19±1 | 25±1 | 26±1 | PN-EN 1015-3:2000 | |
| 4 | Linear shrinkage while thickness is 20 mm (%) | ≤0.2 | ≤0.25 | ≤0.25 | PN-85/B-04500 |
| 5 | Resistance to stifness (Mpa) | ≥0.15 | ≥0.40 | ≥0.60 | PN-85/B-04500 |
| 6 | Resistance to pressure (Mpa) | ≥0.40 | ≥1.20 | ≥1.70 | PN-85/B-04500 |
| 7 | Freezing moment (h) | ||||
| Start | ≤10 | ≤9 | ≤9 | PN-EN 196-1:1996 | |
| Finish | ≤12 | ≤12 | ≤10 | PN-EN 196-1:1996 | |
| 8 | Adhension to concrete base (Mpa) | ≥0.1 | ≥0.2 | ≥0.3 | PN-85/B-04500 |
| 9 | Resistance to blows (dry weather condition) (J) | ≥1 | ≥1 | ≥1 | PN-85/B-04500 |
| 10 | Thermal conductivity coefficient λ while declared value of the temperature is +1 C (W/m K) | ≤0.07 | ≤0.09 | ≤0.10 | PN-EN 12664:2002 |
| 11 | Resistance to fire | A2-S1 d0 | A2-S1 d0 | A2-S1 d0 | PN-EN 13501-1+A1:2010 |