Effect of Chemical Activation Methods on Volcanic Slag-Cement Composite Binder
TAN Yanbin1,2, LI Linxiang1,2, YANG Zhenzhen3, XING Zida4, LIN Xinkai4, GE Xin1,2, YANG Lu1,2, YUAN Qiang3,*
1 China Academy of Railway Sciences Corporation Limited, Beijing 100081, China 2 National Key Laboratory of High-speed Railway Track System, Beijing 100081, China 3 School of Civil Engineering, Central South University, Changsha 410083, China 4 Dundee International Institute, Central South University, Changsha 410083, China
Abstract: The utilization of chemical activation method can enhance the applicability of natural volcanicash produced by waste slags as mineral admixtures in engineering applications. By employing the strength activity index method, a comparative analysis was conducted on the effects of various chemical activators on activation, and the impacts of activator type and dosage on setting time, rheological properties, and pore structure of pulverized pozzolan-cement composite binder were investigated. Results indicate that chemical activators have a more pronounced influence on strength enhancement during intermediate to late ages, with Li2SO4, Na2SO4, and TEA exhibiting superior performance in activating natural volcanic slags up to 18%. Chemical activators accelerate slurry setting while increasing plastic viscosity for newly mixed slurries. They also reduce porosity within composite binder while refining pores size distribution without affecting hydration product types.
谭盐宾, 李林香, 杨珍珍, 邢梓达, 林炘恺, 葛昕, 杨鲁, 元强. 化学活化方法对磨细火山岩弃渣-水泥复合胶凝体系的影响[J]. 材料导报, 2024, 38(22): 24030103-7.
TAN Yanbin, LI Linxiang, YANG Zhenzhen, XING Zida, LIN Xinkai, GE Xin, YANG Lu, YUAN Qiang. Effect of Chemical Activation Methods on Volcanic Slag-Cement Composite Binder. Materials Reports, 2024, 38(22): 24030103-7.
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2024, Vol. 38 
