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Table 1 Chemical composition of attapulgite and cement (\(\mathrm{wt}\)%).

From: Calcined Attapulgite Clay as Supplementary Cementing Material: Thermal Treatment, Hydration Activity and Mechanical Properties

Materials SiO2 Al2O3 Fe2O3 MgO CaO K2O P2O5 SO3 Na2Oeq f-CaO Loss
Attapulgite 55.82 9.40 4.06 12.24 1.43 0.86 0.23 0.01 15.00
Cement 22.10 4.43 3.13 2.28 62.38 2.62 0.53 0.78 2.04