Calorimetric study of the early stages of the nanosilica - tricalcium silicate hydration. Effect of temperature

Materiales de Construccion

S. Martínez-Ramírez¹  I. F. Sáez del Bosque²  M. T. Blanco-Varela² 

[1] Instituto de Ciencias de la Construcción Eduardo Torroja (IETcc-CSIC) - Instituto de Estructura de la Materia (IEM-CSIC);Instituto de Ciencias de la Construcción Eduardo Torroja (IETcc-CSIC);

关键词: calorimetry;    tricalcium silicate;    hydration;    temperature;    nanosilica;   

DOI  :  10.3989/mc.2015.06814

来源: DOAJ

【 摘 要 】

The pozzolanic reaction of nanosilica in contact with C3S was monitored via isothermal conduction calorimetry. Since that reaction is affected by heat, its variations with curing temperature (25, 40 and 65 °C) were also analysed. The findings showed that while C3S hydration was accelerated by both nSA and higher curing temperature, the former impacted the reaction more intensely. Moreover, the presence of nSA was observed to shorten the acceleration stage during C3S hydration, inducing earlier precipitation of portlandite and earlier C-S-H precipitation and nucleation.

【 授权许可】

Unknown