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第四届全国混凝土外加剂学术交流会于1990年10月29日在青岛召开。来自全国二十四个省市自治区的建工、建材、冶金、交通、水电、铁路、解放军、煤炭、化工、石油、军工、高等院校、科研部门、出版社、政府机关、上级学会等共129个单位的197人参加了会议。混凝土外加剂是一个新兴的行业,大有发展前途。在混凝土中掺用外加剂可明显改
The 4th National Concrete Admixture Academic Exchange was held in Qingdao on October 29, 1990. From a total of 24 provinces, municipalities and autonomous regions nationwide, including construction workers, building materials, metallurgy, transportation, hydropower, railways, the PLA, coal, chemical industry, petroleum, military industry, universities, research institutes, publishing houses, government agencies, higher learning institutes, etc. 197 people from 129 units attended the meeting. Concrete admixtures are an emerging industry with promising futures. Adding admixtures in concrete can significantly change