Nanosilica effects on composition and silicate polymerization in hardened cement paste cured under high temperature and pressure

Jung J. Kim; Muhammad K. Rahman; Abdulaziz A. Al-Majed; Mesfer M. Al-Zahrani; Mahmoud M. Reda Taha

doi:10.1016/j.cemconcomp.2013.07.002

Nanosilica effects on composition and silicate polymerization in hardened cement paste cured under high temperature and pressure

Jung J. Kim
, Muhammad K. Rahman
, Abdulaziz A. Al-Majed
, Mesfer M. Al-Zahrani
, Mahmoud M. Reda Taha^*

^*Corresponding author for this work

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

66 Scopus citations

Abstract

Cement pastes of water to cement ratio (w/c) of 0.45 with and without nanosilica are hydrated under two conditions, room condition (20 C with 0.1 MPa pressure) and an oil well condition (80 C with 10 MPa pressure) for 7 days. For the cement pastes with nanosilica, 1% and 3% of cements weights were replaced by nanosilica. The composition of the hardened cement pastes is investigated using X-ray diffraction (XRD). Nuclear magnetic resonance (NMR) experiments are used to quantify the silicate polymerization in hydrated cement paste. Microstructural phases are identified according to the corresponding mechanical property using nanoindentation. The results showed that under room curing conditions, hardened cement paste with 1% nanosilica has the highest level of calcium silicate hydrate (C-S-H) polymerization. However, under high temperature and pressure curing conditions, hardened cement paste with 3% nanosilica has the highest level of C-S-H polymerization. A new relatively stiff microstructural phase is observed in cement pastes incorporating nanosilica and cured under elevated pressure and temperature conditions. The significance of curing conditions and nanosilica content on the polymerization and stiffness of hydrated cement pastes are discussed.

Original language	English
Pages (from-to)	78-85
Number of pages	8
Journal	Cement and Concrete Composites
Volume	43
DOIs	https://doi.org/10.1016/j.cemconcomp.2013.07.002
State	Published - 2013

Bibliographical note

Funding Information:
The authors would like to acknowledge the support provided by King Abdulaziz City for Science and Technology (KACST) through the science and technology unit at King Fahd University of Petroleum and Minerals (KFUPM) for funding this work through Project #09-NAN754-04 as part of the National Science, Technology and Innovation Plan. Additional funding to the first author by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. 2011-0030842) is greatly appreciated. The corresponding author appreciates funding by National Science Foundation (NSF), USA award # 1131369.

Keywords

Microstructure
NMR
Nanoindentation
Nanosilica
XRDA

ASJC Scopus subject areas

Building and Construction
General Materials Science

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10.1016/j.cemconcomp.2013.07.002

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@article{436d98a7894545f2a9ca20fe64061b84,

title = "Nanosilica effects on composition and silicate polymerization in hardened cement paste cured under high temperature and pressure",

abstract = "Cement pastes of water to cement ratio (w/c) of 0.45 with and without nanosilica are hydrated under two conditions, room condition (20 C with 0.1 MPa pressure) and an oil well condition (80 C with 10 MPa pressure) for 7 days. For the cement pastes with nanosilica, 1\% and 3\% of cements weights were replaced by nanosilica. The composition of the hardened cement pastes is investigated using X-ray diffraction (XRD). Nuclear magnetic resonance (NMR) experiments are used to quantify the silicate polymerization in hydrated cement paste. Microstructural phases are identified according to the corresponding mechanical property using nanoindentation. The results showed that under room curing conditions, hardened cement paste with 1\% nanosilica has the highest level of calcium silicate hydrate (C-S-H) polymerization. However, under high temperature and pressure curing conditions, hardened cement paste with 3\% nanosilica has the highest level of C-S-H polymerization. A new relatively stiff microstructural phase is observed in cement pastes incorporating nanosilica and cured under elevated pressure and temperature conditions. The significance of curing conditions and nanosilica content on the polymerization and stiffness of hydrated cement pastes are discussed.",

keywords = "Microstructure, NMR, Nanoindentation, Nanosilica, XRDA",

author = "Kim, \{Jung J.\} and Rahman, \{Muhammad K.\} and Al-Majed, \{Abdulaziz A.\} and Al-Zahrani, \{Mesfer M.\} and \{Reda Taha\}, \{Mahmoud M.\}",

note = "Funding Information: The authors would like to acknowledge the support provided by King Abdulaziz City for Science and Technology (KACST) through the science and technology unit at King Fahd University of Petroleum and Minerals (KFUPM) for funding this work through Project \#09-NAN754-04 as part of the National Science, Technology and Innovation Plan. Additional funding to the first author by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. 2011-0030842) is greatly appreciated. The corresponding author appreciates funding by National Science Foundation (NSF), USA award \# 1131369.",

year = "2013",

doi = "10.1016/j.cemconcomp.2013.07.002",

language = "English",

volume = "43",

pages = "78--85",

journal = "Cement and Concrete Composites",

issn = "0958-9465",

publisher = "Elsevier Ltd.",

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TY - JOUR

T1 - Nanosilica effects on composition and silicate polymerization in hardened cement paste cured under high temperature and pressure

AU - Kim, Jung J.

AU - Rahman, Muhammad K.

AU - Al-Majed, Abdulaziz A.

AU - Al-Zahrani, Mesfer M.

AU - Reda Taha, Mahmoud M.

N1 - Funding Information: The authors would like to acknowledge the support provided by King Abdulaziz City for Science and Technology (KACST) through the science and technology unit at King Fahd University of Petroleum and Minerals (KFUPM) for funding this work through Project #09-NAN754-04 as part of the National Science, Technology and Innovation Plan. Additional funding to the first author by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. 2011-0030842) is greatly appreciated. The corresponding author appreciates funding by National Science Foundation (NSF), USA award # 1131369.

PY - 2013

Y1 - 2013

N2 - Cement pastes of water to cement ratio (w/c) of 0.45 with and without nanosilica are hydrated under two conditions, room condition (20 C with 0.1 MPa pressure) and an oil well condition (80 C with 10 MPa pressure) for 7 days. For the cement pastes with nanosilica, 1% and 3% of cements weights were replaced by nanosilica. The composition of the hardened cement pastes is investigated using X-ray diffraction (XRD). Nuclear magnetic resonance (NMR) experiments are used to quantify the silicate polymerization in hydrated cement paste. Microstructural phases are identified according to the corresponding mechanical property using nanoindentation. The results showed that under room curing conditions, hardened cement paste with 1% nanosilica has the highest level of calcium silicate hydrate (C-S-H) polymerization. However, under high temperature and pressure curing conditions, hardened cement paste with 3% nanosilica has the highest level of C-S-H polymerization. A new relatively stiff microstructural phase is observed in cement pastes incorporating nanosilica and cured under elevated pressure and temperature conditions. The significance of curing conditions and nanosilica content on the polymerization and stiffness of hydrated cement pastes are discussed.

AB - Cement pastes of water to cement ratio (w/c) of 0.45 with and without nanosilica are hydrated under two conditions, room condition (20 C with 0.1 MPa pressure) and an oil well condition (80 C with 10 MPa pressure) for 7 days. For the cement pastes with nanosilica, 1% and 3% of cements weights were replaced by nanosilica. The composition of the hardened cement pastes is investigated using X-ray diffraction (XRD). Nuclear magnetic resonance (NMR) experiments are used to quantify the silicate polymerization in hydrated cement paste. Microstructural phases are identified according to the corresponding mechanical property using nanoindentation. The results showed that under room curing conditions, hardened cement paste with 1% nanosilica has the highest level of calcium silicate hydrate (C-S-H) polymerization. However, under high temperature and pressure curing conditions, hardened cement paste with 3% nanosilica has the highest level of C-S-H polymerization. A new relatively stiff microstructural phase is observed in cement pastes incorporating nanosilica and cured under elevated pressure and temperature conditions. The significance of curing conditions and nanosilica content on the polymerization and stiffness of hydrated cement pastes are discussed.

KW - Microstructure

KW - NMR

KW - Nanoindentation

KW - Nanosilica

KW - XRDA

UR - https://www.scopus.com/pages/publications/84881493333

U2 - 10.1016/j.cemconcomp.2013.07.002

DO - 10.1016/j.cemconcomp.2013.07.002

M3 - Article

AN - SCOPUS:84881493333

SN - 0958-9465

VL - 43

SP - 78

EP - 85

JO - Cement and Concrete Composites

JF - Cement and Concrete Composites

ER -

Nanosilica effects on composition and silicate polymerization in hardened cement paste cured under high temperature and pressure

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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