Fly ash brick (FAB) is a building material, specifically masonry units, containing class C fly ash and water. Compressed at 28 MPa (272 atm) and cured for 24 hours in a 66 °C steam bath, then toughened with an air entrainment agent, the bricks last...
It is argued that these small compartments were built above the ceiling of the burial chamber to relieve the stress of weight that could crack the chamber's ceiling. Some 38 blocks or more, each weighing about 50 to 80 tonnes were placed on top of...