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粉煤灰-脱硫灰制备免烧种植陶粒的研究 认领

Research on Preparation of Unburned Planting Ceramsite with Fly Ash and Desulfurization Ash
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摘要 以粉煤灰和脱硫灰为主要原料,通过蒸汽养护制备粉煤灰-脱硫灰免烧种植陶粒。考察了蒸养时间、蒸养温度、n(SiO2)/n(Na2O)、脱硫灰掺量和发泡剂掺量对粉煤灰-脱硫灰免烧种植陶粒性能的影响。利用XRD、SEM和EDS对陶粒的物相组成、微观形貌和微区成分进行了分析。实验结果表明:在蒸养时间8h、蒸养温度80℃、n(SiO2)/n(Na2O)=5.0、脱硫灰掺量5%、发泡剂掺量0.75%时,可制备出筒压强度为3.56MPa、吸水率为19.95%、堆积密度为931kg/m^3的种植陶粒。陶粒表面光滑,外型美观,内部孔隙结构发达,吸水能力较强,富含Si、Ca和S等元素,适合植物生长需要。 Using fly ash and desulfurization ash as the main raw materials,the fly ash-desulfurization ash unburned planting ceramsite is prepared by steam curing process.The effects of steam curing time,steam curing temperature,n(SiO2)/n(Na2O),desulfurization ash content and foaming agent content on the performance of the as prepared planting ceramsite were investigated.The phase composition,microscopic morphology and micro-domain composition of ceramsite were characterized by XRD,SEM and EDS.The results show that:when the steam curing time is 8h,the steam curing temperature is 80℃,n(SiO2)/n(Na2O)=5.0,the desulfurization ash content is 5%,and the foaming agent content is 0.75%,the planting ceramsite can be prepared with cylinder compressive strength of 3.56 MPa,while still maintaining the water absorption rate of 19.95%and the bulk density of 931kg/m^3.The planting ceramsite prepared achieves a smooth surface,beautiful appearance,developed internal pore structure,strong water absorption capacity,and is rich in elements such as Si,Ca and S,which are suitable for plant growth.
作者 周婷婷 封孝信 谢元涛 李庆龙 刘志刚 ZHOU Tingting;FENG Xiaoxin;XIE Yuantao;LI Qinglong;LIU Zhigang(College of Materials Science and Engineering,North China University of Science and Technology,Tangshan Hebei 063210,China)
出处 《水泥技术》 2020年第5期99-104,共6页 Cement Technology
关键词 种植陶粒 地聚合物 粉煤灰 脱硫灰 planting ceramsite geopolymer fly ash desulfurization ash
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