In this experimental study, the rheological properties of cement-sodium silicate (C-SS) mixtures prepared at different ratios were investigated. The experiments were carried out by adding 3% to 6% cement by mass of the total volume to 30%, 50%, and 70% sodium silicate/solution (SS/S) mixing at 25 °C. The samples prepared for the rheological property determination experiments were mixed at a constant speed of 100 rpm. In the gelation experiments, two different cements, ordinary Portland cement (OPC) and ultra-fine cement (UFC) were used as reactants. Sodium silicate, also known as water glass, was used in the experiments in liquid form, and its modulus was 3. The Blaine value of OPC was 350 m2/kg, whereas that of UFC was 900 m2/kg. UFC-sodium silicate mixtures have faster gelation times than OPC-sodium silicate mixtures due to their high Blaine values. For both cements, the gelation time was shortened as the cement ratio increased, and the gelation time was extended as the sodium silicate ratio increased. The syneresis percentages decreased as the cement ratio increased, whereas the sodium silicate ratio increased up to 50% and decreased after 50%. Viscosity values increased with increasing sodium silicate ratio and cement amount. In this experimental study, gelation reactions could be achieved as a result of sodium silicate-cement reactions using lower cement ratios than those reported in the literature. Another unique aspect of the study is that cement can also be used as a reactant to prepare silicate grouts. The rheological properties of these mixtures, which can be used as alternative grout materials were determined.
Deveci et al. (Fri,) studied this question.