Journal
CEMENT AND CONCRETE RESEARCH
Volume 119, Issue -, Pages 44-50Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.cemconres.2019.01.007
Keywords
C-S-H (B); Polycarboxylate (D); Slag cement (D); Calcined clay cement (D); Pozzolanic reaction (A)
Funding
- SCG Cement-Building Materials
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The effectiveness of a self-synthesized C-S-H-PCE nanocomposite on early strength development of slag and calcined clay blended cements (35 wt% slag or calcined clay) was studied. Addition of C-S-H-PCE was found to substantially increase mortar strength at early ages, particularly after 6-24 h of curing. Isothermal heat flow calorimetry and in-situ XRD measurements indicate that silicate hydration in cement is significantly accelerated. Most remarkably, C-S-H-PCE also speeds up the pozzolanic reaction of slag and calcined clay and stimulates the formation of hemicarbo aluminate (Hc), especially in calcined clay cement. Thus, C-S-H-PCE can foster more widespread use of CEM II/III.
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