The production of Ordinary Portland Cement (OPC/CEM I) contributes around 7–8% to total global CO2e emissions. This research investigates the reduced heat of hydration in a sprayed concrete (SC) containing a high proportion of Ground Granulated Blast Furnace Slag (GGBS) as a cement replacement to reduce the embodied carbon by around 60%. Two spraying trials were conducted, one with CEM I and another with 70% GGBS and 30% CEM I (CEM IIIB). During the trials, temperature evolution was monitored using thermocouples. Cores extracted from the sprayed panels were used to compare the strength of the two mixes. Results showed that the temperature evolution of 70% GGBS concrete was lower than the CEM I concrete, therefore making it less susceptible to thermal cracking and subsequent related durability issues. The strength of the 70% GGBS concrete was also higher than the CEM I at all testing ages. These preliminary outcomes indicate that the GGBS has a significant potential as an alternative, low embodied carbon binder offering high strength and durability properties.