TY - JOUR
T1 - Studies on early stage hydration of tricalcium silicate incorporating silica nanoparticles
T2 - Part II
AU - Singh, L. P.
AU - Bhattacharyya, S. K.
AU - Shah, S. P.
AU - Mishra, G.
AU - Sharma, U.
N1 - Funding Information:
Author (U. Sharma) is grateful to UGC, New Delhi for the Grant of Senior Research Fellowship. Author (G. Mishra) is thankful to CSIR-CBRI , Roorkee for financial support.
Publisher Copyright:
© 2015 Published by Elsevier Ltd.
PY - 2016/1/15
Y1 - 2016/1/15
N2 - The beneficial role of silica nano-particles (SNPs) during the early stage hydration of tricalcium silicate (C3S) has been investigated. ICP results show that SNPs significantly accelerate the hydration rate as well as the growth of hydrated products, by providing additional nucleating sites. XRD results also show a dominant nucleation effect of SNPs up to 10 h. While, at later stage i.e. from 15 to 24 h, the pozzolanic effect of SNPs was dominant. Further, TGA results reveal that, in SNPs incorporated samples, quantity of CH is higher (∼61% at 8 h) up to 10 h, and lower (∼32% at 24 h) from 15 to 24 h than the control, showing the nucleation and pozzolanic effect of SNPs respectively. FTIR and XRD results further reveal an accelerated formation of crystalline C-S-H (jennite and tobermorite) with SNPs. All these results i.e. accelerated hydration, crystalline C-S-H formation and lower C/S (∼1.9) lead to enhanced durability of cementitious materials.
AB - The beneficial role of silica nano-particles (SNPs) during the early stage hydration of tricalcium silicate (C3S) has been investigated. ICP results show that SNPs significantly accelerate the hydration rate as well as the growth of hydrated products, by providing additional nucleating sites. XRD results also show a dominant nucleation effect of SNPs up to 10 h. While, at later stage i.e. from 15 to 24 h, the pozzolanic effect of SNPs was dominant. Further, TGA results reveal that, in SNPs incorporated samples, quantity of CH is higher (∼61% at 8 h) up to 10 h, and lower (∼32% at 24 h) from 15 to 24 h than the control, showing the nucleation and pozzolanic effect of SNPs respectively. FTIR and XRD results further reveal an accelerated formation of crystalline C-S-H (jennite and tobermorite) with SNPs. All these results i.e. accelerated hydration, crystalline C-S-H formation and lower C/S (∼1.9) lead to enhanced durability of cementitious materials.
KW - C-S-H
KW - Hydration
KW - Silica nano-particles
KW - Tricalcium silicate
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U2 - 10.1016/j.conbuildmat.2015.05.084
DO - 10.1016/j.conbuildmat.2015.05.084
M3 - Article
AN - SCOPUS:84948569539
SN - 0950-0618
VL - 102
SP - 943
EP - 949
JO - Construction and Building Materials
JF - Construction and Building Materials
ER -