The world is facing the challenges of global warming and climate changes. Cement industry is responsible for some of the major CO2 emissions, so it is vital to discover an alternatives to ordinary Portland cement (OPC). Geopolymer technology can offer a viable solution towards this target where 80% to 90% reduction in CO2 emission can be achieved by the substituting of (OPC) with geopolymer. The aim of this study is the development of ground granulated blast furnace slag with metakaolin (GGBFS-MK) based geopolymer concrete and examination of the possibility of its usage in the building sector as long-term structural materials. Ethylene glycol (EG) was used to create hybrid organic and inorganic geopolymer composites. The results of the research revealed that GGBFS-MK based geopolymer can be developed, and its physical/mechanical properties were shown to have a very good performance after adding (EG) in different ratios 0.5,1, 1.5, 2, 2.5 % from the total binding weight. According to varied experimental tests FTIR (Fourier transformer infra-red), XRD (X-ray diffraction), and SEM (scanning electron microscope), compressive strength and thermal resistance, the best ratio was found to be 0.5% (EG) which submits a good workability, was not easily affected by temperature changes and gives strength higher than control which gave (66.73, 69.11, 81.93) MPa while using 0.5% (EG) gave (81.12, 85.52, 116.75) MPa at 7, 28 and 90 days of curing respectively.