齐齐哈尔铁路局为了修建某地下工程,需要一大批性能良好的防水材料。当时了解到氯化铁防水剂防水效果、速凝作用都较好,并能提高混凝土强度。但当时货源缺乏,因此,局党委决定自力更生,自己制造。齐齐哈尔铁路三中在毛主席“五·七”指示指引下,承担了试制氯化铁防水剂的任务,并在济南化工厂等单位的协作下,试制成功并投入成批生产。经我局扩大使用,实践证明防水效果良好。氯化铁防水剂样品,曾送国家建委 In order to build an underground project, Qiqihar Railway Bureau needs a large number of good waterproof materials. At that time, it was learned that the water repellent effect of ferric chloride waterproofing agent and the quick-setting effect were all better, and the concrete strength could be improved. However, at the time, the supply was lacking. Therefore, the bureau party committee decided to rely on its own efforts to create its own. Under the guidance of Chairman Mao’s “May 7th” directive, Qiqihar Railway No. 3 Middle School undertook the task of trial-producing ferric chloride water repellent, and under the cooperation of Jinan chemical plant and other units, the trial production was successful and put into batch production. Extensive use by our bureau has proven that the waterproof effect is good. Ferric chloride water repellent sample was sent to the National Construction Commission