C_3S和C_2S对萘系高效减水剂的吸附研究  

Study of Adsorptive Behaviors of Polynaphthalene Sulfonate Superplastizer on C_3S and C_2S

作　　者：李艳君[1] 齐涛[1] 李雯婵[2] 刘通[1] 吴远超[1] 刘晓存[1] 

机构地区：[1]济南大学材料科学与工程学院,山东济南250022 [2]山东省交通科学研究所,山东济南250031

出　　处：《建筑材料学报》2011年第3期362-365,412,共5页Journal of Building Materials

摘　　要：采用紫外-可见吸收光谱法测定了萘系高效减水剂(FDN)在C_3S,C_2S颗粒表面的吸附量,并对该减水剂在这2种单矿物颗粒表面的吸附行为进行了研究.结果表明:C_3S,C_2S对FDN的极限吸附量随着时间的延长而变小;在相同的水化时间下,FDN在C_3S颗粒上的吸附量略大于在C_2S颗粒上的吸附量;当初始质量浓度ρ_0小于1020mg/L时,C_3 S,C_2S对FDN的吸附量随着时间的延长而增大,当ρ_0大于1300mg/L时,它们对FDN的吸附量随着时间的延长而减小.The amount of polynaphthalene sulfonate superplastizer（FDN） adsorbed on the surface of C3S and C2S particles was determined by ultraviolet-visible absorption spectrometry.The adsorptive behavior of polynaphtalene sulfonate superplastizer series on cement component minerals（C3S and C2S） was studied. The results show that the maximum quantity of FDN adsorbed on C3S and C2S decreases with time; the amount of FDN adsorbed on C3S particles is a little more than that on C2S for the same hydration time; and the amount of FDN adsorbed on C3S and C2S increases with time when the initial concentration ofρ0 is lower than 1 020 mg/L,while its adsorption quantity decreases with time when the initial concentration ofρ0 is high.

关 键 词：硅酸三钙 硅酸二钙 萘系高效减水剂 吸附 

分 类 号：TU528.042.2[建筑科学—建筑技术科学]