Pietra Serena

Pietra serena is a grey sandstone. It is also known as Macigno <em>stone</em>. <ul class="dati-generali"> <li class="field-carico_di_rottura_a_compressione"><span class="label-det">Compression tensile strength: </span><span class="value-det">1170 kg/cm²</span></li> <li class="field-carico_di_rottura_dopo_cicli_gelivita"><span class="label-det">Tensile strength after freeze-thaw cycles: </span><span class="value-det">926 kg/cm²</span></li> <li class="field-coefficiente_imbibizione_acqua"><span class="label-det">Water imbibition coefficient: </span><span class="value-det">0,000600</span></li> <li class="field-usura_per_attrito"><span class="label-det">Frictional wear: </span><span class="value-det">7,30 mm</span></li> <li class="field-peso_per_unita_di_volume"><span class="label-det">Mass by unit of volume: </span><span class="value-det">2562 kg/m³</span></li> </ul>