Effect of rich-MgO from low-calcium limestone on the calcination and properties of C4A3$-C2S clinker

Yiping Qiu , Chengming Li , Yiqun Zhang , Yuan Feng , Sergei Leonovich , Piqi Zhao , Shoude Wang

Green Energy and Resources ›› 2024, Vol. 2 ›› Issue (4) : 100099

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Green Energy and Resources ›› 2024, Vol. 2 ›› Issue (4) : 100099 DOI: 10.1016/j.gerr.2024.100099
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Effect of rich-MgO from low-calcium limestone on the calcination and properties of C4A3$-C2S clinker

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Abstract

As one type of low-calcium cement, C4A3$-C2S clinker consumes less energy and can utilize rich-MgO low-calcium limestone. The effect of rich-MgO low-calcium limestone on its calcination and properties is studied by means of f-CaO, XRD Rietveld refinement, TG-DTG and Lithofacies analysis. The results show that 3%∼5% MgO can promote the absorption of f-CaO and accelerate the formation of highly active monoclinic C3S and C4AF in clinker. When the MgO content is 7% and 8%, C4A3$-C2S clinker calcined at 1380°C has excellent mechanical properties and its soundness is still qualified. This research shows that the rich-MgO low-calcium limestone can replace more than 50% of natural limestone to prepare C4A3$-C2S clinker in cement industrial production.

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MgO / C4A3$-C2S clinker / Early hydration / Compressive strength

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Yiping Qiu, Chengming Li, Yiqun Zhang, Yuan Feng, Sergei Leonovich, Piqi Zhao, Shoude Wang. Effect of rich-MgO from low-calcium limestone on the calcination and properties of C4A3$-C2S clinker. Green Energy and Resources, 2024, 2(4): 100099 DOI:10.1016/j.gerr.2024.100099

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