Home / Standards / GB/T 39701-2020 GB/T 39701-2020 Active Limit and test method of ammonium ion content in fly ash 粉煤灰中铵离子含量的限量及检验方法 Standard Type GBT ICS 91.100.10 CCS Q11 Status 现行 Issue Date 2020-12-14 Implementation 2021-11-01 Responsible Dept 中国建筑材料联合会 Drafting Unit N/A