摘要
由于脱硝后的粉煤灰含有氨氮物质,导致在工程应用中出现问题。为了更好的利用粉煤灰,标准GB/T 39701—2020对粉煤灰中铵离子含量提出限量,并提出了检验方法,其中蒸馏滴定法较精确,且操作方便。从粉煤灰中铵离子含量对水泥混凝土性能及环境的两个方面,对粉煤灰中铵离子含量进行限值是非常必要的,粉煤灰铵离子含量限值是否需要根据服役条件的进行分类规定值得探讨;若按粉煤灰铵离子含量的限值为不大于210 mg/kg执行,为更好的利用粉煤灰降低粉煤灰中铵离子的预处理方法则是关键技术。
As the denitrification fly ash contains ammonia nitrogen material,leading to problems in engineering applications.In order to make better use of fly ash,standard GB/T 39701—2020 limits the content of ammonium ion in fly ash,and puts forward a test method,among which distillation titration method is more accurate and easy to operate.It is very necessary to limit the content of ammonium ion in fly ash from two aspects of the performance of cement concrete and the environment.It is worth discussing whether the limit of the content of ammonium ion in fly ash should be classified according to the service conditions.If the limit of the content of ammonium ion in fly ash is no more than 210 mg/kg,the pretreatment method to reduce the ammonium ion in fly ash for better use of fly ash is the key technology.
作者
秦洪一
王智
王缘
贾丽莉
毕耀
刘川
QIN Hongyi;WANG Zhi;WANG Yuan;JIA Lili;BI Yao;LIU Chuan(College of Meterials Science and Engineering,Chongqing University,Chongqing 400000,China;China Construction West Construction Materials Research Institute Co.,Ltd.,Chengdu 610000,China;Chongqing Haishen Applied Technology Research Institute Co.,Ltd.,Chongqing 400000,China)
出处
《混凝土》
CAS
北大核心
2023年第1期25-27,共3页
Concrete
基金
国家自然科学基金(5187020786)
中建西部建设股份有限公司科技研发计划(ZJXJ-2019-12)。
关键词
脱硝
粉煤灰
铵离子含量限值
检测方法
denitration
fly ash
ammonium ion content limit
test methods
