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我们在上级各领导部门的大力支持下,学习了北京豆店砖瓦厂的先进经验,与厅属材料实验厂配合协作,于1964年元月份开始作试制承重空心砖的准备工作,克服了制机、成型等方面诸多困难,在7月份制坯成功,经干燥后,8月份陆续焙烧成砖。共有三种孔形,即:矩形36孔、圆形38孔和斜矩形39孔,已试制成了四万多块。大部分是室外自然干燥,用隧道窑、瓦窑焙烧,成品的抗压强度达到200号,容重为1073～1400kg/m~3,吸水率13～14%,抗冻试验-15℃冻融15次合格,规格为240×115×87mm。
With the strong support of superior leaders and departments, we learned the advanced experience of the Beijing bean store brick and tile factory and cooperated with the Office of affiliated material experiment factory. In January 1964, we began to prepare for trial-producing load-bearing hollow bricks and overcame the machine. There were many difficulties in molding, molding, etc. In July, the billet was successful. After drying, it was gradually baked into bricks in August. There are three kinds of hole shapes, namely: rectangular 36 holes, round 38 holes, and oblique rectangular 39 holes, and more than 40,000 pieces have been tested. Most of them are natural outdoor drying. They are fired in tunnel kilns and brick kilns. The compressive strength of the finished product reaches 200, the bulk density is 1073-1400 kg/m 3, the water absorption rate is 13-14%, and the frost resistance test is -15°C. Times qualified, specification is 240×115×87mm.