Effect of C-S-H-PCE on hydration of reference cement system
The traditional early strength agent will have some influence on the performance of concrete early strength anddurability in the practical application process,so it is necessary todevelop a new type of early strength agent.Among them,new type early strength of agentna-no-C-S-H-PCE can better accelerate the early hydration of cement-based materials,which is conducive to the rapid generation of hydra-tion products.It is of great significance for thedevelopment and application of C-S-H-PCE to explore the effect of C-S-H-PCE early strength agent on the hydration of reference cement system.Based on thedissolution-precipitation theory of cement hydration,this paper studies the effect of C-S-H-PCE on the hydration stages of the reference cement system.The effects of C-S-H-PCE and nano-SiO2 on the hydration process were compared and analyzed by hydration heat test,and the setting time and compressive strength of each stage were measured.The results showed that the addition of C-S-H-PCE significantly shortened the hydration induction period,increased the maximum heat release rate of hydration,and promoted thedissolution of unhydrated particles.C-S-H-PCE shortened the initial and final setting time,and the strength of 1d and 3d was significantly improved.It can be seen from this that the action law and influence mechanism of C-S-H-PCE on the hydration of reference cement,so as to establish the relationship between hydration microstructure and macroscopic mechanical properties.
C-S-H-PCE early strength agentstandard cement systemhydration heatcondensation timecompressive strengthnano-SiO2
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