Home / Standards / GB/T 27974-2011 GB/T 27974-2011 Active Methods for chemical analysis of fly ash and coal gangue in building materials 建材用粉煤灰及煤矸石化学分析方法 Standard Type GBT ICS 91.100.10 CCS Q11 Status 现行 Issue Date 2023-11-02 Implementation 2012-10-01 Responsible Dept N/A Drafting Unit N/A