Campus Units

Materials Science and Engineering, Industrial and Manufacturing Systems Engineering, Ames Laboratory, Civil, Construction and Environmental Engineering

Document Type

Article

Publication Version

Accepted Manuscript

Publication Date

6-2021

Journal or Book Title

Cement and Concrete Research

Volume

144

First Page

106417

DOI

10.1016/j.cemconres.2021.106417

Abstract

It has been well recognized that the benefits and effectiveness of nanoparticles in cement-based materials could not be maximized if these are not well dispersed. To address this issue, in this study, different anionic (SDS and PCE) and nonionic surfactants (Tweens and Tritons) were used to disperse nanosilica (NS) in aqueous solution and cement pore solution. The results show that the dispersibility of NS in cement pore solution was improved, and the compressive strength of the cement-NS pastes increased linearly with critical micelle concentration (CMC) of nonionic surfactants. Among all surfactants studied, Triton X-405 led the paste to the highest increase in strength (33% at 1-day and 41% at 3-days) since it had the highest CMC. TEM and EDS analysis evidenced that this strength increase might be attributed to the nucleation of outer product CSH gel and its densification with calcite nanocrystals, attributed to Triton X-405 addition.

Comments

This is a manuscript of an article published as Sargam, Yogiraj, Kejin Wang, Ayuna Tsyrenova, Fei Liu, and Shan Jiang. "Effects of anionic and nonionic surfactants on the dispersion and stability of nanoSiO2 in aqueous and cement pore solutions." Cement and Concrete Research 144 (2021): 106417. DOI: 10.1016/j.cemconres.2021.106417. Posted with permission.

Copyright Owner

Elsevier Ltd.

Language

en

File Format

application/pdf

Available for download on Tuesday, March 07, 2023

Published Version

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