复合水泥对生活污泥固化效果的研究
|
摘要
以硅酸盐水泥为机体,利用铝酸盐水泥水化速度快和二水石膏促进生成钙矾石的特点,组成三元复合水泥固化剂固化城市污泥。研究复合水泥对固化体力学性能、矿物组成和水化速率的影响。分析结果表明:固化剂的掺量不应低于20%,铝酸盐水泥和二水石膏会促进固化体水化,产物钙矾石和C-S-H凝胶起到骨架作用,保证了固化体的强度。
Portland cement is the main body. Using the characteristics of quick hydration of aluminate cement and the formation of ettringite by dihydrate gypsum. A ternary composite cement curing agent is used to cure urban sludge. The effect of composite cement on the mechanical properties,mineral composition and hydration rate of the cured body was studied. The analysis results show that the content of curing agent should not be less than 20%,aluminate cement and dihydrate gypsum will promote the hydration of the solidified body,and the product ettringite and C-S-H gel will act as a skeleton to ensure the strength of the solidified body.
Portland cement is the main body. Using the characteristics of quick hydration of aluminate cement and the formation of ettringite by dihydrate gypsum. A ternary composite cement curing agent is used to cure urban sludge. The effect of composite cement on the mechanical properties,mineral composition and hydration rate of the cured body was studied. The analysis results show that the content of curing agent should not be less than 20%,aluminate cement and dihydrate gypsum will promote the hydration of the solidified body,and the product ettringite and C-S-H gel will act as a skeleton to ensure the strength of the solidified body.
引文
[1]彭晓峰,陶涛,陈剑波,等.国际污泥研究现状初探[J].自然杂志,2002,24(4):191-194.
[2]王鹏,唐朝生,孙凯强,等.污泥处理的固化稳定化技术研究进展[J].工程地质学报,2016,24(4):649-660.
[3]张杞蓉,普晓晶.中国城市污水厂污泥处置现状研究[J].环境科学与管理,2015,40(4):86-89.
[4]Krebs W,Bachofen R,Brandl H.Growth stimulation of sulfur oxidizing bacteria for optimization of metal leaching efficiency of fly ash from municipal solid waste incineration[J].Hydrometallurgy,2001,59:283-290.
[5]王培铭,孙磊,徐玲琳,等.硅酸盐水泥与铝酸盐水泥混合体系的研究和应用[J].材料导报A:综述篇,2013,27(1):139-142.
[6]霍世金.硅酸盐水泥-铝酸盐水泥-石膏三元复合胶凝材料试验研究[D].西安:西安建筑科技大学,2007.
[2]王鹏,唐朝生,孙凯强,等.污泥处理的固化稳定化技术研究进展[J].工程地质学报,2016,24(4):649-660.
[3]张杞蓉,普晓晶.中国城市污水厂污泥处置现状研究[J].环境科学与管理,2015,40(4):86-89.
[4]Krebs W,Bachofen R,Brandl H.Growth stimulation of sulfur oxidizing bacteria for optimization of metal leaching efficiency of fly ash from municipal solid waste incineration[J].Hydrometallurgy,2001,59:283-290.
[5]王培铭,孙磊,徐玲琳,等.硅酸盐水泥与铝酸盐水泥混合体系的研究和应用[J].材料导报A:综述篇,2013,27(1):139-142.
[6]霍世金.硅酸盐水泥-铝酸盐水泥-石膏三元复合胶凝材料试验研究[D].西安:西安建筑科技大学,2007.