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Limestone is surprisingly affordable
Specimen of a single-leaf wall built of Bruhn Quarry second strata sawn limestone blocks of nominal dimensions 660mm long x 290mm high x 120mm laid with mortar mix consisting of sand, lime and cement in the ratio of 6:1:1 by volume.
The mass per unit area of the wall was determined as: 152 kg/m2
Nominal thickness of wall: 120mm
| One/Third-Octave Band Centre Frequency (Hz) | ||
|---|---|---|
| 100 | 125 | 160 |
| 200 | 255 | 315 |
| 400 | 500 | 630 |
| 800 | 1000 | 1250 |
| 1600 | 2000 | 2500 |
| 3150 | 4000 | 5000 |
| Airborne Sound-Transmission Loss (dB) | ||
|---|---|---|
| 32 | 32 | 31 |
| 32 | 33 | 32 |
| 35 | 36 | 39 |
| 43 | 44 | 47 |
| 50 | 52 | 54 |
| 57 | 57 | 58 |
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