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| Research and Production Practice of Low Alkali and High Silica Ratio Portland Cement for Nuclear Power Engineering |
| CAO Qin1, LIU Shuaiming2, ZENG Jiangbo2, ZHU Jing2, XIAO Fenglin2
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1 China National Materials Group Pingxiang Cement Co., Ltd. , Pingxiang Jiangxi 337006, China; 2 Jiangxi Anfu Southern Cement Co., Ltd. , Anfu Jiangxi 343200, China
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Abstract To meet the market demand for Portland cement in nuclear power projects and address the challenge of producing high-quality clinker from high-silica, low-calcium limestone, this study employed optimized raw materials and fuels, four-component raw meal blending, and refined calcination control techniques to produce nuclear-grade cement clinker with a silica ratio of approximately 3.50 and an alkali content below 0.40%. The resulting P·N42.5 cement exhibits the "three lows and one high" characteristics (low alkali, low heat of hydration, low dry shrinkage, and high early strength), not only meeting national standards but also providing a new pathway for the high-value utilization of low-grade limestone.
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Received: 07 September 2025
Published: 19 May 2026
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