[1040] Ｍicrostructural evolution of hardened limestone calcined clay cement paste during first drying
Keywords:limestone calcined clay cement、1H NMR relaxometry、pore structur、C-(A)-S-H
The pore structures of Ordinary Portland Cement (OPC) and Limestone Calcined Clay Cement (LC3 ) were compared using 1H Nuclear Magnetic Resonance. The chemical insight into C-(A)-S-H structure have been provided by Fourier transform infared spectrometry. The results indicate that LC3 has a larger interlayer and gel pore width than OPC. A significant change in pore structure occurs when the relative humidity (RH) drops to about 33% for both OPC and LC3 . RH exerts different effects on OPC and LC3 , which can be attributed to a more loose stacking of C-(A)-S-H layers in LC3 after aluminum intake.