1 light: absolutely dry bulk density of 500-600 kg / cubic meter, 1/4 light brick wholesale ordinary concrete, brick 1/3, 1/2 hollow brick, and wood almost can float on water. Light brick can reduce the weight of buildings, greatly reduce the overall cost of the building. When the mortar joints drywall reduce light brick shortcomings, the use of red brick wall need 0.2m3 per cubic mortar, using lightweight foam concrete block walls only 0.06 m3 per cubic mortar, masonry mortar cost savings per cubic around 14 yuan .