The micro_expansive agent is made up of fly ash, CAS and FSL(content of gypsum range). The experiment has shown that the concrete incorporating fly ash, expansive agent (CAS and FSL) for substituting a part of cement can produce delayed expansion.

• 研究了以粉煤灰、氟石膏摊平剂FSL的适宜组分组成的微膨胀剂和石膏系膨胀剂CAS替代部分水泥使混凝土产生延时膨胀的作用 ,通过控制微膨胀剂对混凝土的延时膨胀 ,使其与混凝土的温度变形相匹配 ;