摘要
利用高钙粉煤灰（CFA）基地聚合物协同处置城市垃圾焚烧飞灰（MSWIFA），研究了CFA—MSWIFA复合地聚合物中MSWIFA的掺量、养护制度、反应产物及其安全性。结果表明：CFA—MSWIFA复合地聚合物中MSWIFA的掺量宜控制在10％以内；较佳的养护制度是室温薄膜包覆养护。CFA基地聚合物反应产物中，地聚合物与水化产物并存；与CFA基地聚合物相比，CFA-MSWIFA复合地聚合物体系的水化系数提高，而聚合系数降低，反应产物中水化产物的比重增加。利用CFA基地聚合物处置5％-15％MSWIFA，其重金属浸出浓度均远低于标准最高限值，安全性可靠。
In this paper, high calcium fly ash （CFA） is used to dispose Municipal Solid Waste Incineration Fly Ash （MSWIFA）. Content of MSWIFA in CFA-MSWIFA geopolymer, curing condition, reaction products, and the security of the CFA-MSWIFA geopolymer are investigated. The resuhs show that the content of the MSWIFA in the CFA-MSWIFA geopolymer should be less than 10%. Plastic film is chosen to be used for curing at room temperature. Geopolymer and hydration products coexist in CFA geopolymer and CFA-MSWIFA geopolymer. In CFA-MSWIFA geopolymer system, the hydration coefficient is increased while geopolymeric coefficient is decreased. The proportion of hydration products in CFA -MSWIFA geopolymer is larger than that in CFA geopolymer. Leaching concentrations of heavy metals are far lower than the limit values from the geopolymer with 5%-15% MSWIFA, which means the CFA-MSWIFA geopolymer has a good environmental security.
出处
《粉煤灰综合利用》
CAS
2013年第6期14-17,23,共5页
Fly Ash Comprehensive Utilization
基金
国家自然科学基金(51172164和51208370)
教育部博士点基金(20110072120046)
中央高校基本科研业务费专项资金(0500219170)
关键词
高钙粉煤灰
垃圾焚烧飞灰
地聚合物
重金属
high calcium fly ash （CFA）
municipal solid waste incineration fly ash （MSWIFA）
geopolymer
heavy metals
