北京市房管局统管的房屋,每年因基建需要拆除的旧房数量很大。城区及近郊区房屋2700万平米中,有特旧房屋230万平米需要改建。按1980年基本建设项目计算,共拆除旧房20万平米,其中住宅为17万平米。若每年拆除旧房按20万平米计算,则拆除的碎砖将达7万立米,用以制造砌块,可建造住宅30万平米。因此,利用旧房拆除下来的碎砖,既可 The number of old houses that need to be demolished each year due to infrastructure construction is large in the houses under the control of the Beijing Housing Authority. Of the 27 million square meters of urban and suburban houses, 2.3 million square meters of old buildings are required to be reconstructed. According to the 1980 basic construction project, a total of 200,000 square meters of old houses were demolished, of which 170,000 square meters were residential. If the demolition of old houses is calculated at 200,000 square meters per year, the disassembled broken bricks will reach 70,000 cubic meters for the production of blocks, and 300,000 square meters of residential buildings can be built. Therefore, the broken bricks removed from the old house can be used