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The effect of a polycarboxylate ether on C3A / CaSO4·2H2O passivation monitored by optical spectroscopy

Alejandra Ramírez,Jutta Pauli,Claudia Crasselt,Sebastian Simon,Wolfram Schmidt,Ute Resch-Genger

Construction and Building Materials（2021）

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Abstract
•Analysis of cement hydration by fluorescence and diffuse reflectance spectroscopy.•The applied cyanine dye proofed itself to be a suitable and stable optical probe.•Optical visualization of the initial retardation of the hydration of C3A caused by PCE.•Monitoring the formation of metastable phases and changes in ettringite formation.•Alternative screening method for comparing the effects of different PCEs in the future.
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Key words
Polycarboxylate superplasticizer,C3A-gypsum,Hydration,Optical spectroscopy,Cyanine dye
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