Study on Early Hydration of Cement-Bagasse Ash-Ceramic Powder Cementitious Material System
To explore the applicability of industrial waste materials such as bagasse ash and ceramic powder as supplementary cementitious materials in cement-based materials,this paper uses a simplex centroid design method to design the mix for the cement-bagasse ash-ceramic powder ternary cementitious system.The early hydration performance through setting time,hydration heat,and proton nuclear magnetic resonance is studied.The results show that both bagasse ash and ceramic powder extend the setting time of cement paste,with ceramic powder having a greater delaying effect.The hydration heat peak of cement paste shifts later with the increase of bagasse ash content,and slightly earlier with the increase of ceramic powder content.The incorporation of both bagasse ash and ceramic powder reduces the hydration heat and the degree of hydration at 72 h.The incorporation of bagasse ash and ceramic powder increases the proton NMR signal intensity,with the cement-bagasse ash combination showing a higher signal intensity.The cement-bagasse ash-ceramic powder system has good synergistic effects,and the ternary system can produce cementitious materials with setting time meeting specifications,and lower hydration heat.The experimental results provide a reference for the green application of industrial waste and the preparation of low-heat concrete.
cementbagasse ashceramic powderearly hydrationhydrogen nuclear magnetic resonancehydration degree