INVESTIGATION OF THE STRUCTURE OF THE SOLIDIFIED MATERIAL IN THE HARDENING PROCESS OF PORTLAND CEMENT AND SODIUM SILICATE

Abstract

We investigated the structure of solidified sodium silicate solidified with cement using Raman spectroscopy, X-ray diffraction measurements, and ²⁹Si solid MAS NMR measurements. Raman spectroscopy and NMR measurements confirmed that alite was consumed in the early stage of the reaction, and sodium silicate promoted the reaction, resulting in an intermediate phase consisting of a chain structure containing Q². Furthermore, X-ray diffraction halo analysis revealed the formation of an amorphous solid derived from tobermorite.