自增韧建筑石膏基制品的制备  

Preparation of Self-toughen Building Gypsum-based Products

作　　者：王春[1,2] 郭伟[2] 

机构地区：[1]江苏大学材料科学与工程学院,江苏镇江212013 [2]盐城工学院材料工程学院,江苏盐城224051

出　　处：《非金属矿》2017年第2期27-31,共5页Non-Metallic Mines

基　　金：江苏省生态建材与环保装备协同创新中心项目(CP201506);江苏省科技厅社会发展项目(BE2015659;BE2015152);江苏省墙改办项目(2016043)

摘　　要：在建筑石膏中加入镍渣、微量煤矸石和生石灰,研究了养护方式和水泥对自增韧建筑石膏基制品强度和抗冲击性能的影响,通过X射线衍射和扫描电镜分析了增韧机理。结果表明:湿热养护方式下加入水泥能大幅度提升制品的韧性,标养28 d后在95℃下湿热养护3 h,掺入15%P·O42.5,自增韧建筑石膏基制品的抗折强度可达到4.05 MPa,抗冲击性能达到10.13 k J/m^2,性能优于普通增韧制品。XRD和SEM表明制品中生成了大量针状钙矾石相、絮状凝胶,这些物质或交叉生长,或填充孔洞,提高了制品的韧性。Adding nickel slag, trace coal gangue and quicklime in building gypsum, study the effects of the conservation methods and cement on strength and impact resistance of self-toughen building gypsum-based products, analyze the toughening mechanism by X-ray diffraction and scanning electron microscopy. The results showed that： heat curing method while adding cement can greatly enhance the toughness of products, heat curing at 95 ℃ of 3 h after standard curing 28 d, add 15% P·O42.5, flexural strength of product is 4.05 MPa, impact resistance reached 10.13 kJ/m^2. XRD and SEM show that the products generated a lot of needles ettringite phase, flocculent gel, these substances or cross-grown, or fill holes to improve the toughness of products.

关 键 词：建筑石膏 镍渣 增韧 钙矾石 

分 类 号：TQ177.377[化学工程—硅酸盐工业]