Early Stage Hydration Studies of Tricalcium Silicate Using Silica Nanoparticles

Author(s): Lok P Singh, Dilshad Ali and Usha Sharma
Paper category: Proceedings
Book title: Proceedings of the International Conference on Advances in Construction Materials and Systems, Vol. 1
Editor(s): Manu Santhanam, Ravindra Gettu, Radhakrishna G. Pillai, Sunitha K. Nayar
ISBN: 978-2-35158-193-3
e-ISBN: 978-2-35158-191-9
Publisher: RILEM Publications SARL
Publication year: 2017
Pages: 113-124
Total Pages: 12
Language : English

Abstract: Silica nanoparticles (SNPs) are being explored to develop nano-engineered concrete so as to achieve high performance and durability. The effect of SNPs on mechanical strength of cementitious system is well studied; however, the hydration mechanism in presence of SNPs at early stage is still not well understood. The present research is focused towards the early stage hydration mechanism and quantification of hydration products in tricalcium silicate (C3S) using SNPs. The ionic concentration in pore solution was measured by ICP and UV-Visible. The results show that in SNPs incorporated samples silicate concentration was higher at initial stage upto acceleration period and shift in acceleration period was also observed. Thermogravimetric Analysis (TGA) results revealed that SNPs show dominant nucleation effect from 4 - 8 h and pozzolanic effect from 10-24 h of hydration. These nanoparticles exhibited acceleration in the hydration rate (~75% at 8 h and ~31% at 24 h) due to the formation of additional calcium-silicate-hydrate (C-S-H) nuclei.

Online publication : 2017
Publication type : full_text
Public price (Euros) : 0.00