Studies on early stage hydration of tricalcium silicate incorporating silica nanoparticles: Part I

L. P. Singh; S. K. Bhattacharyya; S. P. Shah; G. Mishra; S. Ahalawat; U. Sharma

doi:10.1016/j.conbuildmat.2014.08.046

Studies on early stage hydration of tricalcium silicate incorporating silica nanoparticles: Part I

L. P. Singh^*, S. K. Bhattacharyya, S. P. Shah, G. Mishra, S. Ahalawat, U. Sharma

^*Corresponding author for this work

Civil and Environmental Engineering

Research output: Contribution to journal › Article › peer-review

107 Scopus citations

Abstract

Hydration of tricalcium silicate (C₃S) in presence of nano silica at early stage has been investigated and formation of addition calcium silicate hydrate (C-S-H) has been quantitatively estimated. Prepared C₃S was hydrated in the presence of powder nanosilica (30-70 nm) using w/b ratio 0.4 for paste study and 5.0 for aqueous phase study. Results of ICP and XRD showed that the stage of supersaturation of Ca²⁺ is delayed by 30 min and formation of secondary/additional C-S-H starts at the early stages of C₃S hydration in the presence of nano silica. This additional C-S-H is responsible for higher dissolution of C₃S as observed by FTIR. SEM/EDX results show the formation of denser C-S-H with low C/S ratio in the presence of nano silica, whereas TG analysis revealed the formation of additional C-S-H (∼50%) in nano silica incorporated C₃S system which is accountable for the higher specific surface area as obtained by N₂-adsorption.

Original language	English (US)
Pages (from-to)	278-286
Number of pages	9
Journal	Construction and Building Materials
Volume	74
DOIs	https://doi.org/10.1016/j.conbuildmat.2014.08.046
State	Published - Jan 15 2015

Funding

Author (Usha Sharma) is grateful to University Grant Commission, New Delhi for grant of Junior Research Fellowship.

Keywords

C-S-H
Hydration
Nano silica
Tricalcium silicate

ASJC Scopus subject areas

Civil and Structural Engineering
Building and Construction
General Materials Science

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10.1016/j.conbuildmat.2014.08.046

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title = "Studies on early stage hydration of tricalcium silicate incorporating silica nanoparticles: Part I",

abstract = "Hydration of tricalcium silicate (C3S) in presence of nano silica at early stage has been investigated and formation of addition calcium silicate hydrate (C-S-H) has been quantitatively estimated. Prepared C3S was hydrated in the presence of powder nanosilica (30-70 nm) using w/b ratio 0.4 for paste study and 5.0 for aqueous phase study. Results of ICP and XRD showed that the stage of supersaturation of Ca2+ is delayed by 30 min and formation of secondary/additional C-S-H starts at the early stages of C3S hydration in the presence of nano silica. This additional C-S-H is responsible for higher dissolution of C3S as observed by FTIR. SEM/EDX results show the formation of denser C-S-H with low C/S ratio in the presence of nano silica, whereas TG analysis revealed the formation of additional C-S-H (∼50%) in nano silica incorporated C3S system which is accountable for the higher specific surface area as obtained by N2-adsorption.",

keywords = "C-S-H, Hydration, Nano silica, Tricalcium silicate",

author = "Singh, {L. P.} and Bhattacharyya, {S. K.} and Shah, {S. P.} and G. Mishra and S. Ahalawat and U. Sharma",

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doi = "10.1016/j.conbuildmat.2014.08.046",

language = "English (US)",

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T2 - Part I

AU - Singh, L. P.

AU - Bhattacharyya, S. K.

AU - Shah, S. P.

AU - Mishra, G.

AU - Ahalawat, S.

AU - Sharma, U.

PY - 2015/1/15

Y1 - 2015/1/15

N2 - Hydration of tricalcium silicate (C3S) in presence of nano silica at early stage has been investigated and formation of addition calcium silicate hydrate (C-S-H) has been quantitatively estimated. Prepared C3S was hydrated in the presence of powder nanosilica (30-70 nm) using w/b ratio 0.4 for paste study and 5.0 for aqueous phase study. Results of ICP and XRD showed that the stage of supersaturation of Ca2+ is delayed by 30 min and formation of secondary/additional C-S-H starts at the early stages of C3S hydration in the presence of nano silica. This additional C-S-H is responsible for higher dissolution of C3S as observed by FTIR. SEM/EDX results show the formation of denser C-S-H with low C/S ratio in the presence of nano silica, whereas TG analysis revealed the formation of additional C-S-H (∼50%) in nano silica incorporated C3S system which is accountable for the higher specific surface area as obtained by N2-adsorption.

AB - Hydration of tricalcium silicate (C3S) in presence of nano silica at early stage has been investigated and formation of addition calcium silicate hydrate (C-S-H) has been quantitatively estimated. Prepared C3S was hydrated in the presence of powder nanosilica (30-70 nm) using w/b ratio 0.4 for paste study and 5.0 for aqueous phase study. Results of ICP and XRD showed that the stage of supersaturation of Ca2+ is delayed by 30 min and formation of secondary/additional C-S-H starts at the early stages of C3S hydration in the presence of nano silica. This additional C-S-H is responsible for higher dissolution of C3S as observed by FTIR. SEM/EDX results show the formation of denser C-S-H with low C/S ratio in the presence of nano silica, whereas TG analysis revealed the formation of additional C-S-H (∼50%) in nano silica incorporated C3S system which is accountable for the higher specific surface area as obtained by N2-adsorption.

KW - C-S-H

KW - Hydration

KW - Nano silica

KW - Tricalcium silicate

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Studies on early stage hydration of tricalcium silicate incorporating silica nanoparticles: Part I

Abstract

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Keywords

ASJC Scopus subject areas

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