一、前言为了落实毛主席“备战、备荒、为人民”的伟大战略方针,适应国防建设和工农业建设快速施工的需要,自1970年开始,我所对混凝土早强剂进行了研究。前后使用了几十种化工材料,进行了成百批试验,探索有效的早强剂配方,并通过施工实践来检验所选配方的实际使用效果。根据两年多来的反复试验改进和施工实践的检验,确定了以硫酸钠为主 I. Preface In order to implement Chairman Mao’s great strategic principle of “prepare war, prepare for waste, and serve the people” and adapt to the needs of national defense construction and rapid construction of industrial and agricultural construction, we have been conducting research on concrete early strength agents since 1970. Dozens of chemical materials were used before and after, hundreds of batches of tests were conducted, effective early strength agent formulations were explored, and the actual use effects of the selected formulations were examined through construction practices. Based on the trial and error of two years of improvement and inspection of construction practices, it was determined that