摘要
为了研究超细磷渣-水泥体系的水化过程,测试了普通磷渣、9μm、4μm和2μm超细磷渣-水泥体系的胶砂抗压强度、电阻率和水化热,并根据水化热研究了其水化动力学。结果表明:磷渣粒径越小,其活性指数越高;当磷渣粒径为2μm,掺量为30%时,28 d活性指数可达125.3%;掺入磷渣会抑制水泥的水化,但随着磷渣粒径的减小,其水化速率逐渐增加,电阻率逐渐增大;磷渣掺量越多,结晶成核与晶体生长NG阶段反应历程越长,相边界反应Ⅰ阶段反应历程越短;磷渣粒径越小,复合胶凝材料在结晶成核与晶体生长NG、相边界反应Ⅰ和扩散D过程中的反应速率常数K_(1)′、K_(2)′、K_(3)′均呈现增大的趋势,结晶成核与晶体生长过程最明显。
To study the hydration process of the superfine phosphorus slag-cement system,the compressive strength,resistivity and hydration heat of 9μm,4μm and 2μm superfine phosphorus slag-cement system were measured,and the hydration kinetics were studied.The results showed that the smaller the particle size of the phosphorus slag was,the higher the activity index was.When the particle size of phosphorus slag is 2μm and the content is 30%,the 28 d activity index reaches 125.3%.The hydration of cement was inhibited by the addition of phosphorus slag.However,as the particle size of phosphorus slag decreases,the hydration rate and resistivity gradually get improvement.When the phosphorus slag dosage is higher,the NG stage reaction process is longer,and the I stage reaction process is shorter.When the particle size of phosphorus slag is smaller,the reaction rate constants K_(1)′,K_(2)′and K_(3)′in NG,I and D all show an increasing trend,especially in NG process.
作者
肖虎成
苏英
王迎斌
马梦阳
贺行洋
曾三海
XIAO Hucheng;SU Ying;WANG Yingbin;MA Mengyang;HE Xingyang;ZENG Sanhai(School of Civil Engineering and Environmental Sciences,Hubei University of Technology,Wuhan 430068,China;Center of Advanced and Innovative Technologies,VSB-Technical University of Ostrava,70800 Ostrava-Poruba,Czech Republic)
出处
《新型建筑材料》
2021年第6期1-5,17,共6页
New Building Materials
基金
“十三五”国家重点研发计划项目(2019YFC1907100)
湖北省重点研发计划项目(2020BCA077)。
关键词
磷渣
超细化
水化动力学
phosphorus slag
ultrafine
hydration kinetics
