X-Ray Diffraction Comparison Study of Binders Derived from Pure C₃S and Portland Cement Paste

Abstract

The purpose of this study is to compare binders of two different origins. The powders obtained from crushing pure C3S and hydrated cement for 28 days with w/b=0.6 and 0.5, respectively, will be subjected to heat treatment at 800°C. This work used X-ray diffraction (XRD) as a technique to characterize. According to X-ray diffraction, heat treatment resulted in the synthesis of β-C2S belite in the pure phase and two polymorphs α'-C2S and β-C2S in the cement phase. The binder regenerated from cement pastes generates C-S-H at an early stage, which can be attributed to the high reactivity of the α'-C2S polymorph.