根据调查 ,2 0 0 0年度北京市建筑砌块 (含轻集料混凝土空心砌块、加气混凝土砌块和普通混凝土空心砌块 )应用情况简述如下 :一、砌块企业概况1 截止 2 0 0 0年底 ,全市拥有建筑砌块生产企业 86个 ,其中轻集料混凝土砌块企业 72个 (其中陶粒砌块企业 70个 ,炉渣砌块企业 2个 ) According to the survey, the application of Beijing building block (including light aggregate concrete hollow block, aerated concrete block and ordinary concrete hollow block) in 2000 is as follows: I. Overview of Block Enterprise 1 Deadline 2 By the end of 2004, the city had 86 building block manufacturing enterprises, of which 72 were light aggregate concrete blocks (70 were ceramsite blocks and 2 were slag block blocks)