Fig. 17: Comparison of metakaolin (MK, 95% kaolinite) and calcined clay (CC, 79% kaolinite) as full replacements for silica fume. | npj Materials Sustainability

Fig. 17: Comparison of metakaolin (MK, 95% kaolinite) and calcined clay (CC, 79% kaolinite) as full replacements for silica fume.

From: Recent advances in low-carbon ultra-high-performance concrete: materials, mechanisms, and sustainability perspectives

Fig. 17

a Compressive strength development of UHPC mixes up to 60 days. b Evolution of portlandite content in the UHPC mixes normalised per gram of cement (CSF.LS: control mix with 54% limestone, 34.5% cement, and 11.5% silica fume; UHPC_CC_B: silica fume fully replaced by MK (Burgess); UHPC_CC_I: silica fume fully replaced by CC (India)). Reproduced with permission72. Copyright 2017, Elsevier B.V.

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