Recently, the application of green concrete as an alternative for conventional concrete has become popular worldwide. The innovative green concrete can be produced using waste materials as one of its components. Therefore, recent years witnessed a huge increase in the studies that investigate geopolymer’s fresh and hardened properties. The previous studies show that workability loss, rapid setting time and the need for heat curing are the main constraints that restrict the production of cast in place geopolymer concrete. This study aims to reach the optimum activator modulus which achieves the maximum compressive strength with acceptable workability. Nine different mixtures were blended using industrial by-products, such as Ground Granulated Blast Furnace Slag (GGBS) and Metakaolin (MK). Two main materials mixtures were used; either slag or 50/50 slag/MK. Sodium hydroxide and sodium silicate were used as an activator. The main variables were the base material (GGBS and MK), water/binder ratio (0.0, and 15.0%), and modulus of silicate (1.1, 1.3, 1.5, and 1.7). Fresh and hardened properties were examined using the flow table test, and compressive strength test, respectively. It has been observed that by increasing the modulus of silicate, the workability increased and the compressive strength decreased. Adding water decreased compressive strength significantly, as well. Based on the statistical analysis, it was concluded that the mixture of 1.7 modulus of silicate is the optimum mixture. It worth mentioning that the compressive strength of the optimum mixture after 7, 28 and 90 days of water curing were 19.6, 33.4 and 35.6 MPa, respectively, and its flowability was about 150%.

最近，绿色混凝土作为常规混凝土的替代品的应用已在世界范围内普及。可以使用废料作为其成分之一来生产创新的绿色混凝土。因此，近年来，研究地聚合物的新鲜和硬化性能的研究有了巨大的增长。先前的研究表明，可加工性损失，快速凝固时间和热固化需求是限制现浇地质聚合物混凝土生产的主要限制因素。这项研究旨在达到最佳的活化剂模量，从而以可接受的可加工性获得最大的抗压强度。使用工业副产品（如粉碎的高炉矿渣（GGBS）和偏高岭土（MK））将9种不同的混合物进行混合。使用了两种主要材料的混合物。炉渣或50/50炉渣/ MK。氢氧化钠和硅酸钠用作活化剂。主要变量是基础材料（GGBS和MK），水/粘合剂比率（0.0和15.0％）和硅酸盐模量（1.1、1.3、1.5和1.7）。分别使用流表测试和抗压强度测试检查了新鲜和硬化性能。已经观察到，通过增加硅酸盐的模量，可加工性增加并且抗压强度降低。加水也显着降低了抗压强度。根据统计分析得出结论，硅酸盐模量为1.7的混合物是最佳混合物。值得一提的是，在水固化7、28和90天后，最佳混合物的抗压强度分别为19.6、33.4和35.6 MPa，