Disclosed is a method of fabricating a construction element. The method may include assembling a mold on a rotational casting machine; rotating the mold around at least two axes at a predetermined speed; providing a first portion of magnesium silico-phosphate cement (MSPC) mix, having an altered hardening rate, to the mold while rotating the mold until at least a portion of the molds walls is covered by a first layer of the MSPC mix; and rotating the mold until the MSPC mix is hardened to a predetermined degree.