固废磷石膏基纤维增强水泥板制备及环保性能分析  

Incorporation of Solid Waste in Fibers Cement Boards:Fabrication and Environmental Performance Analysis

作　　者：赵洲峰 裘吕超 邹君文 付军[3] 张澳 李锐杰 ZHAO Zhou-feng;QIU Lv-chao;ZOU Jun-wen;FU Jun;ZHANG Ao;LI Rui-jie(Zhejiang Electric Power Corporation Research Institute,Hangzhou 310014,China;Zhejiang Power Boiler and Pressure Vessel Inspection Co,Ltd,Hangzhou 310014,China;State Key Lab of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]国网浙江省电力有限公司电力科学研究院,杭州310014 [2]浙江省电力锅炉压力容器检验所有限公司,杭州310014 [3]武汉理工大学硅酸盐建筑材料国家重点实验室,武汉430070

出　　处：《建材世界》2024年第2期26-29,共4页The World of Building Materials

基　　金：国家自然基金(高掺量固废磷石膏绿色低碳泡沫混凝土保温板研发(GJRD2022-04)和屏蔽中子射线的磷石膏功能集料制备及其对UHPC的抗冲击、防辐射性能提升机理(52378235))。

摘　　要：研究旨在探讨利用预处理改性固废磷石膏(SWC)部分替代水泥,结合木质纤维、POM(Polyoxymethylene,聚甲醛)纤维、水泥和细砂,基于流浆法工艺制备固废磷石膏基纤维增强水泥板,进一步分析不同预处理改性磷石膏掺量(10%、20%、30%、40%)对纤维增强水泥板的物理、力学和环保性能的影响。实验结果表明,纤维增强水泥板的物理性能,如密度和吸水率,受到预处理改性磷石膏引入的影响较小。随着SWC掺量增加饱水抗折强度总体呈下降趋势,掺量在0~20%区间时影响并不明显,即便不掺入POM纤维,其3 d抗压强度仍可达到4.16MPa,满足A类和B类R1级纤维水泥板强度4 MPa的要求。加入适量POM纤维(1%)可以明显增加纤维增强水泥板强度。此外,制备过程中纤维增强水泥板CO_(2)排放量减少约20%,二氧化硫(SO_(2))和氮氧化物(NO_(x))等污染物的排放也显著减少,同时环境中可溶性磷酸盐和氟化物等污染物含量也间接降低。This study investigates the feasibility of partially substituting cement with pre-treated modified solid waste phosphogypsum,along with wood fibers,POM fibers,cement,and fine sand,to produce fiber-reinforced cement boards using the slurry method.The research analyzes the impact of different pre-treated modified phosphogypsum contents(10%,20%,30%,40%)on the mechanical and environmental performance of these boards.Results show minimal effects on physical properties like density and water absorption due to pre-treated modified phosphogypsum.While the saturated flexural strength declines with increased phosphogypsum content,the effect is insignificant within the 0~20%range.Even without POM fibers,the 3-day compressive strength meets Class A and B R1-grade fiber cement board requirements at 4.16 MPa.The addition of 1%POM fibers significantly enhance board strength.Moreover,substituting cement with pre-treated modified phosphogypsum has reduced CO_(2) emissions by about 20%,lowered pollutants like sulfur dioxide(SO_(2))and nitrogen oxides(NO_(x)),and indirectly decreased the content of soluble phosphates and fluorides in the environment.

关 键 词：预处理改性磷石膏 纤维增强水泥板 环保性能 

分 类 号：X705[环境科学与工程—环境工程] TQ172.6[化学工程—水泥工业]