Sodium Oleate and Styrene-Acrylate Copolymer Emulsion-Modified Cement Mortar: Functional Combination of Physical Barrier and Hydrophobicity
Publication: Journal of Materials in Civil Engineering
Volume 35, Issue 8
Abstract
Styrene-acrylic emulsion (SAE)-modified mortar is typically used as an impermeable cement-based material. Although high-volume SAE-modified mortar shows excellent penetration resistance performance, this property can also cause compressive strength loss. In this work, sodium oleate (SO) is used as a hydrophobic agent to enhance the antipermeability of mortar with low SAE content. The influence of the incorporation of hydrophobic agent on the mechanical properties, hydration characteristics, water absorption, and impermeable and hydrophobic properties of low content polymer emulsion-modified cement mortars was investigated. The results show that the mortar with 5% SAE and 1% SO has better impermeability, hydrophobicity, and compressive strength than a mortar with 15% SAE only, which is attributed to the physical barrier of SAE and the hydrophobicity of SO. SO works well with 5% SAE-modified mortar, and the improvements in all aspects of the performance are greater than that of the high content SAE-SO–modified mortars. However, increasing the amount of SO will not bring continuous improvement in antipermeability, as the air-entraining effects of SO increase the porosity of the matrix.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
The authors would also like to acknowledge the National Natural Science Foundation of China (52172017, 51902095), the Key Research and Development Program of Hubei Province (2021BCA153 and 2020BCA077) and the Natural Science Foundation of Hubei Province Innovation Group Project (2020CFA039), and the Scientific Research Foundation of Hubei University of Technology (GCRC2020012).
Author contributions: Jin Yang: conceptualization, methodology, validation, investigation, data curation, review and editing of the writing; Jinfu Wang: investigation, writing of the original draft; Xingyang He: supervision, conceptualization, project administration; Xiaolei Yu: investigation, data curation; Jianxiang Huang: investigation, data curation; Ying Su: methodology, validation, formal analysis; and Sang-Keun Oh: validation, conceptualization.
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Journal of Materials in Civil Engineering
Volume 35 • Issue 8 • August 2023
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© 2023 American Society of Civil Engineers.
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Received: Sep 8, 2022
Accepted: Jan 5, 2023
Published online: May 29, 2023
Published in print: Aug 1, 2023
Discussion open until: Oct 29, 2023
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