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Effect of BaO on mechanical and hydration characteristic of C8A6P as predominant mineral in phosphoaluminate cement

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Abstract

Phosphoaluminate cement clinker (PAC) was one type of cementitious material due to its high durability and mechanical performance. As the predominant mineral phase in PAC, the high-temperature formation and property of calcium phosphoaluminate mineral (C8A6P) were related closely with hydration and mechanical characteristic for PAC. Thus, the influence of BaO on the performance of C8A6P mineral phase was investigated carefully in this paper. It was found that BaO of 17.5–20% content could endow C8A6P mineral with predominant mechanical performance. This was due to the fact that C8A6P mineral was activated by BaO. Excessive BaO would lead to the formation of new unexpected phase BaO·Al2O3. The limited solid solubility of BaO in C8A6P mineral was 20%. The addition of BaO changed the ratio of hydration products of C2(A,P)H8 and C(A,P)H10 for C8A6P mineral.

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Acknowledgements

This work is supported by Natural Science Foundations of China (51672108), Natural NSFC-Shandong Joint Fund (No. U1806222), Key research and development plan of Shandong Province (2018GGX107009) and Horizontal scientific research of Shenzhen Gangchuang Building Materials Co., LTD (jk-807-2017). Also, supports from the 111 Project of International Corporation on Advanced Cement-based Materials (No. D17001) and the Taishan Scholars Program (No. ********) are greatly appreciated.

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Authors and Affiliations

  1. Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan, 250022, China

    Shoude Wang, Shuai Yang & Xin Cheng

  2. Shenzhen Gangchuang Building Material CO., LTD, Shenzhen, 518051, China

    Yu Liu & Xinghua Fu

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  1. Shoude Wang
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  2. Yu Liu
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Correspondence to Shoude Wang or Xin Cheng.

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Wang, S., Liu, Y., Yang, S. et al. Effect of BaO on mechanical and hydration characteristic of C8A6P as predominant mineral in phosphoaluminate cement. J Therm Anal Calorim 139, 3499–3506 (2020). https://doi.org/10.1007/s10973-019-08723-6

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  • DOI: https://doi.org/10.1007/s10973-019-08723-6

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