摘要
采用初、终凝时间,抗压强度试验,对不同磷石膏掺量下经550℃热处理得到的水泥浆脱水相的再水化硬化性能进行了研究。采用XRD、SEM等测试手段测定了矿物组成及微观结构。结果表明:磷石膏的加入使得浆体凝结时间延长,显著地改善了其工作性能;同时,随着磷石膏掺量的增加,抗压强度呈上升趋势,并在掺量为8%时达到最大值。微观测试表明:磷石膏-水泥浆脱水相复合胶凝材料体系的主要水化产物是钙矾石、CSH凝胶等,且钙钒石和CSH凝胶相互交织形成密实的网状结构。
The effects of phosphogypsum on rehydration characteristics of dehydrated cement paste subjected to high temperatures（550 ℃） were evaluated.A series of experiments like initial and final setting times and compressive strength were employed.And test methods like XRD and SEM were adopted in detecting the mineral composition and microstructure.The results showed that the setting times were prolonged and the workability was improved obviously with the addition of phosphogypsum.Meanwhile,the compressive strength showed increasing trend with the increase of phosphogypsum,and reached the maximum at 8% ratio.On the other hand,rehydration products of dehydrated cement paste with phosphogypsum mainly consisted of ettringite and CSH,and they interlaced to form a network structure.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2010年第14期26-29,共4页
Journal of Wuhan University of Technology
基金
国家"973"计划前期研究专项项目(2006CB708608)
关键词
水泥浆脱水相
磷石膏
再水化
钙钒石
dehydrated cement paste
phosphogypsum
rehydration
ettringite
