Research Article
Reducing Railway Noise with Porous Sound-Absorbing Concrete Slabs
Table 1
Parameters of P.O52.5 cement.
| 80 μm sieve residue (%) | Setting time (min) |
Flexural strength (Mpa)—ISO 679:1989 |
Compression strength (Mpa)—ISO 679:1989 | Stability | Initial setting time | Final setting time | 3 d | 28 d | 3 d | 28 d |
| 1.5 | 139 | 205 | 4.5 | 7.8 | 25.1 | 55.5 | Qualified |
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