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Effect of Emulsifier Type on the Properties of SBR-Modified Cement-Based Materials.

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Title: Effect of Emulsifier Type on the Properties of SBR-Modified Cement-Based Materials.
Authors: Xu, Anhua1,2 (AUTHOR), Wang, Laifa2,3 (AUTHOR), Zheng, Suining2,3,4 (AUTHOR), Jia, Huiting4 (AUTHOR), Wang, Xinyan1,3 (AUTHOR), Xu, Yindong1,2 (AUTHOR), Chen, Huaxin2,3,4 (AUTHOR)
Source: Polymers (20734360). May2026, Vol. 18 Issue 9, p1128. 20p.
Subjects: Styrene-butadiene rubber, Stabilizing agents, Mortar, Mechanical behavior of materials, Durability, Hydration, Microstructure, Freeze-thaw cycles
Abstract: Styrene butadiene rubber (SBR) is a commonly used polymer modifier that can improve the mechanical properties and durability of cement mortar. However, the effects of different emulsifier types on cement hydration behavior and structural evolution still need to be systematically studied. To clarify the differences among anionic, cationic, and nonionic SBR emulsions on mortar performance, three types of SBR emulsion were selected in this study. Setting time, chemically bound water, mechanical properties, chloride ion diffusion, freeze–thaw cycles, and microstructure were tested to evaluate the effects of different types and dosages on cement mortar. The results show that all three types of SBR emulsion prolong the setting time of cement paste and reduce the early hydration degree. The cationic SBR emulsion shows a more obvious effect. At 28 d, the compressive strength of mortar with 10% cationic SBR emulsion increases from 38.5 MPa to 41.2 MPa, and the flexural strength also increases. In terms of impermeability, the chloride ion diffusion coefficient decreases from 7.47 × 10−12 m2/s to 5.12 × 10−12 m2/s after adding 10% cationic SBR emulsion. After 100 freeze–thaw cycles, the compressive strength loss of ordinary mortar is 16%, while it decreases to 7.2% with 15% cationic SBR emulsion, and the mass loss is also reduced. Microstructural analysis shows that the modified mortar has a denser internal structure, improved interfacial continuity, and reduced crack development after freeze–thaw cycles. [ABSTRACT FROM AUTHOR]
Copyright of Polymers (20734360) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Effect of Emulsifier Type on the Properties of SBR-Modified Cement-Based Materials.
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  Data: <searchLink fieldCode="AR" term="%22Xu%2C+Anhua%22">Xu, Anhua</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Laifa%22">Wang, Laifa</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zheng%2C+Suining%22">Zheng, Suining</searchLink><relatesTo>2,3,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Jia%2C+Huiting%22">Jia, Huiting</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Xinyan%22">Wang, Xinyan</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xu%2C+Yindong%22">Xu, Yindong</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chen%2C+Huaxin%22">Chen, Huaxin</searchLink><relatesTo>2,3,4</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Polymers+%2820734360%29%22">Polymers (20734360)</searchLink>. May2026, Vol. 18 Issue 9, p1128. 20p.
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  Data: <searchLink fieldCode="DE" term="%22Styrene-butadiene+rubber%22">Styrene-butadiene rubber</searchLink><br /><searchLink fieldCode="DE" term="%22Stabilizing+agents%22">Stabilizing agents</searchLink><br /><searchLink fieldCode="DE" term="%22Mortar%22">Mortar</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+behavior+of+materials%22">Mechanical behavior of materials</searchLink><br /><searchLink fieldCode="DE" term="%22Durability%22">Durability</searchLink><br /><searchLink fieldCode="DE" term="%22Hydration%22">Hydration</searchLink><br /><searchLink fieldCode="DE" term="%22Microstructure%22">Microstructure</searchLink><br /><searchLink fieldCode="DE" term="%22Freeze-thaw+cycles%22">Freeze-thaw cycles</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Styrene butadiene rubber (SBR) is a commonly used polymer modifier that can improve the mechanical properties and durability of cement mortar. However, the effects of different emulsifier types on cement hydration behavior and structural evolution still need to be systematically studied. To clarify the differences among anionic, cationic, and nonionic SBR emulsions on mortar performance, three types of SBR emulsion were selected in this study. Setting time, chemically bound water, mechanical properties, chloride ion diffusion, freeze–thaw cycles, and microstructure were tested to evaluate the effects of different types and dosages on cement mortar. The results show that all three types of SBR emulsion prolong the setting time of cement paste and reduce the early hydration degree. The cationic SBR emulsion shows a more obvious effect. At 28 d, the compressive strength of mortar with 10% cationic SBR emulsion increases from 38.5 MPa to 41.2 MPa, and the flexural strength also increases. In terms of impermeability, the chloride ion diffusion coefficient decreases from 7.47 × 10−12 m2/s to 5.12 × 10−12 m2/s after adding 10% cationic SBR emulsion. After 100 freeze–thaw cycles, the compressive strength loss of ordinary mortar is 16%, while it decreases to 7.2% with 15% cationic SBR emulsion, and the mass loss is also reduced. Microstructural analysis shows that the modified mortar has a denser internal structure, improved interfacial continuity, and reduced crack development after freeze–thaw cycles. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Polymers (20734360) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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        Value: 10.3390/polym18091128
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      – Code: eng
        Text: English
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        PageCount: 20
        StartPage: 1128
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      – SubjectFull: Styrene-butadiene rubber
        Type: general
      – SubjectFull: Stabilizing agents
        Type: general
      – SubjectFull: Mortar
        Type: general
      – SubjectFull: Mechanical behavior of materials
        Type: general
      – SubjectFull: Durability
        Type: general
      – SubjectFull: Hydration
        Type: general
      – SubjectFull: Microstructure
        Type: general
      – SubjectFull: Freeze-thaw cycles
        Type: general
    Titles:
      – TitleFull: Effect of Emulsifier Type on the Properties of SBR-Modified Cement-Based Materials.
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            NameFull: Xu, Anhua
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            NameFull: Wang, Laifa
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            NameFull: Zheng, Suining
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            – D: 01
              M: 05
              Text: May2026
              Type: published
              Y: 2026
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