Bulletin of the Chinese Ceramic Society, Volume. 41, Issue 12, 4154(2022)

Strength and Impermeability of Cement-Based Materials with Nano SiO2 and Styrene-Butadiene Rubber Powder Composite Modification

WANG Zhixin1,*... MEI Junpeng1,2, LI Hainan3, DONG Chong1, ZHANG Jielin1, ZHOU Lanlan1 and NIU Yinlong4 |Show fewer author(s)
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  • 1[in Chinese]
  • 2[in Chinese]
  • 3[in Chinese]
  • 4[in Chinese]
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    In this paper, the flexural strength, compressive strength, water absorption and unsteady chloride ion migration coefficient were used to investigate the effect of styrene-butadiene rubber powder (SBR)/nano SiO2 (NS) on strength and impermeability of cement-based materials. The hydration products and microstructure of cement-based materials were analyzed by XRD, DSC-TG, FTIR, SEM-EDS and MIP. Results show that complex SBR/NS significantly improves the early strength degradation of cement-based materials caused by single SBR. Both single SBR and complex SBR/NS reduce the water absorption, water absorption rate and unsteady chloride ion migration coefficient, and the effect of complex SBR/NS is better than that of single SBR. The microscopic test shows that the single SBR reduces the content of Ca(OH)2 and the number of harmful pores and more-harmful pores and increases the integrity of the structure. The complex SBR/NS further reduces the content of Ca(OH)2, promotes the hydration reaction to generate more C-S-H, improves the polymerization degree of C-S-H, decreases the most probable aperture, reduces the amount of less-harmful pores, harmful pores and more-harmful pores, lowers the Ca/Si ratio of hydration products, and thus enhances the flexural strength, and compressive strength and improves the impermeability of the sample.

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    WANG Zhixin, MEI Junpeng, LI Hainan, DONG Chong, ZHANG Jielin, ZHOU Lanlan, NIU Yinlong. Strength and Impermeability of Cement-Based Materials with Nano SiO2 and Styrene-Butadiene Rubber Powder Composite Modification[J]. Bulletin of the Chinese Ceramic Society, 2022, 41(12): 4154

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    Paper Information

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    Received: Jul. 11, 2022

    Accepted: --

    Published Online: Mar. 5, 2023

    The Author Email: Zhixin WANG (1281054652@qq.com)

    DOI:

    CSTR:32186.14.

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