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由中国土木工程学会混凝土和预应力混凝土学会混凝土外加剂专业委员会和中国建材工业协会混凝土外加剂协会联合主办、青岛市十梅庵助剂厂承办的第四届全国混凝土外加剂学术交流会于1990年10月29日至11月3日在青岛市召开。来自全国各地的会议代表200多人参加了会议。
The 4th National Concrete Admixture Academic Conference hosted by the China Civil Engineering Society Concrete and Prestressed Concrete Society Concrete Admixture Professional Committee and the China National Building Materials Industry Association Concrete Admixture Association, Qingdao Shimeimei Auxiliary Plant, was established in 1990. Held in Qingdao from October 29 to November 3. More than 200 delegates from all parts of the country attended the conference.