河南省安阳市某大厦地下室钢筋混凝土柱及剪力墙,拆模后发现,混凝土没有强度,风干2天后,表面仍呈潮湿状态,发黄。最初怀疑所用水泥有质量问题,并将剩余水泥全部封存停用。经安阳市技术监督局的检验,排除了水泥存在质量问题的可能性。后经安阳市建筑工程质量检测中心站取样检测,初步认定是由于施工时掺加的缓凝型减水剂(木质素磺酸钠)过多所 Reinforced concrete column and shear wall in the basement of a building in Anyang City, Henan Province. After demolishing the mold, it was found that the concrete had no strength. After 2 days of air drying, the surface was still wet and yellow. Initially doubted the quality of the cement used, and all remaining cement was shut down. An inspection by the Anyang Technical Supervision Bureau ruled out the possibility of cement quality problems. After sampling and testing at the Anyang City Construction Engineering Quality Testing Center Station, it was initially determined that there was excessive use of a slow-setting water-reducing agent (sodium lignosulfonate) at the time of construction.