摘要
The effects of fly ash with different mixing volume and different particle sizes on pore solution of cement-based materials were studied. The pore solution was extracted by squeezing at scheduled ages. The particle size distribution of fly ash was classified as smaller than 45 μm and 45～80 μm,and the mixing volume was classified as 10% and 20%. The concentrations of K+,Na+ and Ca2+ were measured using Inductively Coupled Plasma Emission Spectrometer (ICP),and the pH was measured by acid-base titration. The results indicate that the concentrations of various ions were prompted at the initial time of the hydration. With further hydration,ion concentrations of K+ and Na+ raise again and finally stabilized,but there is a certain decline on Ca2+ later on. It also shows that fly ash exhibited great effect on the hydration of cement,it can lower the concentration of Ca2+ and pH of the pore solution,but raise the concentrations of K+ and Na+. More importantly,ion concentrations of K+,Na+ and Ca2+ reduced with smaller particle sizes of fly ash.
The effects of fly ash with different mixing volume and different particle sizes on pore solution of cement-based materials were studied. The pore solution was extracted by squeezing at scheduled ages. The particle size distribution of fly ash was classified as smaller than 45 μm and 45～80 μm,and the mixing volume was classified as 10% and 20%. The concentrations of K＋,Na＋ and Ca2＋ were measured using Inductively Coupled Plasma Emission Spectrometer （ICP）,and the pH was measured by acid-base titration. The results indicate that the concentrations of various ions were prompted at the initial time of the hydration. With further hydration,ion concentrations of K＋ and Na＋ raise again and finally stabilized,but there is a certain decline on Ca2＋ later on. It also shows that fly ash exhibited great effect on the hydration of cement,it can lower the concentration of Ca2＋ and pH of the pore solution,but raise the concentrations of K＋ and Na＋. More importantly,ion concentrations of K＋,Na＋ and Ca2＋ reduced with smaller particle sizes of fly ash.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2010年第17期112-116,共5页
Journal of Wuhan University of Technology
基金
supported by the National Fundamental Scientific Research Project (PR China),relevant to"Basic research in Environmentally Friendly Concrete (2009CB623201)"
research Project 50802067 supported by National Natural Science Foundation of China
