Effects of graphene oxide on early-age hydration and electrical resistivity of Portland cement paste

Wengui Li; Xiangyu Li; Shu Jian Chen; Yan Ming Liu; Wen Hui Duan; Surendra P. Shah

doi:10.1016/j.conbuildmat.2017.01.066

Effects of graphene oxide on early-age hydration and electrical resistivity of Portland cement paste

Wengui Li^*, Xiangyu Li, Shu Jian Chen, Yan Ming Liu, Wen Hui Duan, Surendra P. Shah

^*Corresponding author for this work

Civil and Environmental Engineering

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

276 Scopus citations

Abstract

The effects of graphene oxide (GO) on the early-age hydration process and mechanical properties of Portland cement paste were experimentally investigated in this study. Based on an isothermal calorimeter measurement, the hydration rate of cement was observed to increase with the increase of GO content by nucleation effect. On the other hand, the electrical resistivity development of GO-cement paste was monitored using a non-contact electrical resistivity device. The result showed that electrical the resistivity of GO-cement paste was evidently higher than that of plain cement paste. However, cement paste with excessive amounts of GO exhibited a decreased electrical resistivity due to the massive ion diffusion caused by GO. Compared to plain cement paste, the GO-cement paste exhibited obviously higher compressive and flexural strengths, but the enhancements in compressive strength began to decline when the GO amount was greater than 0.04%. The microstructure characterization indicated that GO can apparently densify the cement pastes with less porosity and hydrates networking, which is consistent with the results of hydration acceleration and strength enhancement.

Original language	English (US)
Pages (from-to)	506-514
Number of pages	9
Journal	Construction and Building Materials
Volume	136
DOIs	https://doi.org/10.1016/j.conbuildmat.2017.01.066
State	Published - Apr 1 2017

Funding

The authors gratefully acknowledge the financial support of the Australian Research Council (DE150101751) and Australian Research Council Research Hub for Nanoscience Based Construction Materials Manufacturing (IH150100006). The authors are also grateful for the financial support of the National Natural Science Foundation of China (51408210) and National Engineering Laboratory for High-speed Railway Construction, Central South University, P.R. China.

Keywords

Electrical resistivity
Graphene oxide (GO)
Hydration heat
Mechanical strength
Microstructure

ASJC Scopus subject areas

Civil and Structural Engineering
Building and Construction
General Materials Science

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10.1016/j.conbuildmat.2017.01.066

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title = "Effects of graphene oxide on early-age hydration and electrical resistivity of Portland cement paste",

abstract = "The effects of graphene oxide (GO) on the early-age hydration process and mechanical properties of Portland cement paste were experimentally investigated in this study. Based on an isothermal calorimeter measurement, the hydration rate of cement was observed to increase with the increase of GO content by nucleation effect. On the other hand, the electrical resistivity development of GO-cement paste was monitored using a non-contact electrical resistivity device. The result showed that electrical the resistivity of GO-cement paste was evidently higher than that of plain cement paste. However, cement paste with excessive amounts of GO exhibited a decreased electrical resistivity due to the massive ion diffusion caused by GO. Compared to plain cement paste, the GO-cement paste exhibited obviously higher compressive and flexural strengths, but the enhancements in compressive strength began to decline when the GO amount was greater than 0.04%. The microstructure characterization indicated that GO can apparently densify the cement pastes with less porosity and hydrates networking, which is consistent with the results of hydration acceleration and strength enhancement.",

keywords = "Electrical resistivity, Graphene oxide (GO), Hydration heat, Mechanical strength, Microstructure",

author = "Wengui Li and Xiangyu Li and Chen, {Shu Jian} and Liu, {Yan Ming} and Duan, {Wen Hui} and Shah, {Surendra P.}",

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doi = "10.1016/j.conbuildmat.2017.01.066",

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AU - Li, Wengui

AU - Li, Xiangyu

AU - Chen, Shu Jian

AU - Liu, Yan Ming

AU - Duan, Wen Hui

AU - Shah, Surendra P.

PY - 2017/4/1

Y1 - 2017/4/1

N2 - The effects of graphene oxide (GO) on the early-age hydration process and mechanical properties of Portland cement paste were experimentally investigated in this study. Based on an isothermal calorimeter measurement, the hydration rate of cement was observed to increase with the increase of GO content by nucleation effect. On the other hand, the electrical resistivity development of GO-cement paste was monitored using a non-contact electrical resistivity device. The result showed that electrical the resistivity of GO-cement paste was evidently higher than that of plain cement paste. However, cement paste with excessive amounts of GO exhibited a decreased electrical resistivity due to the massive ion diffusion caused by GO. Compared to plain cement paste, the GO-cement paste exhibited obviously higher compressive and flexural strengths, but the enhancements in compressive strength began to decline when the GO amount was greater than 0.04%. The microstructure characterization indicated that GO can apparently densify the cement pastes with less porosity and hydrates networking, which is consistent with the results of hydration acceleration and strength enhancement.

AB - The effects of graphene oxide (GO) on the early-age hydration process and mechanical properties of Portland cement paste were experimentally investigated in this study. Based on an isothermal calorimeter measurement, the hydration rate of cement was observed to increase with the increase of GO content by nucleation effect. On the other hand, the electrical resistivity development of GO-cement paste was monitored using a non-contact electrical resistivity device. The result showed that electrical the resistivity of GO-cement paste was evidently higher than that of plain cement paste. However, cement paste with excessive amounts of GO exhibited a decreased electrical resistivity due to the massive ion diffusion caused by GO. Compared to plain cement paste, the GO-cement paste exhibited obviously higher compressive and flexural strengths, but the enhancements in compressive strength began to decline when the GO amount was greater than 0.04%. The microstructure characterization indicated that GO can apparently densify the cement pastes with less porosity and hydrates networking, which is consistent with the results of hydration acceleration and strength enhancement.

KW - Electrical resistivity

KW - Graphene oxide (GO)

KW - Hydration heat

KW - Mechanical strength

KW - Microstructure

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Effects of graphene oxide on early-age hydration and electrical resistivity of Portland cement paste

Abstract

Funding

Keywords

ASJC Scopus subject areas

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