在山区建设中,由于缺乏红砖,使建筑工程的进度受到很大影响。为了解决山区建设墙体材料来源问题,我公司广大职工,遵照毛主席关于“备战、备荒、为人民”的伟大方针,在开展“工业学大庆”群众运动中,发扬“自力更生,艰苦奋斗”的革命精神,经过反复实践,研制而推广了水泥砂空心大砖。水泥砂空心大砖是由细骨料(一般用砂子,也可用煤渣、石屑等)、水泥而 In the construction of mountainous areas, due to the lack of red bricks, the progress of construction projects has been greatly affected. In order to solve the problem of the source of wall materials for mountain construction, the majority of employees of our company followed Chairman Mao’s great policy of “preparing for war, preparing for waste, and serving the people”. In carrying out the “Daqing Industrial Science” mass campaign, we promoted “self-reliance and arduous struggle”. The revolutionary spirit, after repeated practice, developed and promoted the cement sand hollow large brick. Cement sand hollow brick is made of fine aggregate (usually sand, also can use cinder, stone chips, etc.), cement and