Inorganic Chemicals Industry >
Preparation of C-S-H/PCE nanocomposites and its effect on early hydration of cement
Received date: 2024-09-27
Online published: 2025-09-23
In order to solve the problems of slow development of early strength and coarsening of pore structure of traditional fly ash mixed cement mortar，polycarboxylate modified calcium silicate hydrate（C-S-H/PCE） nanocomposites were synthesized by co-precipitation method，and their structures were characterized by various microscopic testing methods.Its effects on the early mechanical properties，pore structure，hydration kinetics and hydration products of cement mortar were deeply explored.The results showed that the addition of C-S-H/PCE could effectively improve the early compressive strength of mortar，and the growth rate of compressive strength was proportional to the content of C-S-H/PCE.When curing age was increased，the growth rate of compressive strength was decreased.C-S-H/PCE could significantly reduce the porosity of mortar samples and reduce the proportion of macropores in mortar，so as to improve the compactness of cement mortar and refine the pore structure.C-S-H/PCE could promote the early hydration of cement paste and improve the early hydration degree of cement paste.The higher the content of C-S-H/PCE，the more obvious the promotion effect.C-S-H/PCE not only effectively promoted the formation of more hydration products of cement and accelerated the whole hydration process，but also this process did not change the composition of hydration products，which ensured the stability and controllability of cement performance.Future research could focus on optimizing the preparation process of C-S-H/PCE，exploring its applicability in different types of cement and admixture systems，and its influence mechanism on the long-term durability of cement-based materials.At the same time，combined with advanced computational simulation technology，the interaction mechanism between C-S-H/PCE nanocomposites and cement matrix was deeply revealed，which provided theoretical basis and technical support for the development of high-performance and long-life cement-based materials.
Key words： C-S-H; cement hydration; pore structure; hydration products
YIN Yujiao , WU Fei , ZHOU Wenqiang , HE Dianwei . Preparation of C-S-H/PCE nanocomposites and its effect on early hydration of cement[J]. Inorganic Chemicals Industry, 2025 , 57(9) : 66 -72 . DOI: 10.19964/j.issn.1006-4990.2024-0514
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