## 6 Conclusions  
In this study, the engineering performance regarding the setting time, flowability, bleeding rate, concretion rate, and compressive strength of alkali-activated GGBFS-zeolite powder slurry with different mix ratios were measured. The surface morphology and chemical composition of slurry concretions was analyzed using SEM and XRD. Simultaneously, the influence of various material factors and performance indicators on the slurry was quantitatively analyzed using one-factor standard deviation and GRA. The main conclusions are as follows:  
1. The setting time of alkali-activated GGBFS-zeolite powder slurry exhibits a positive correlation with the proportions of zeolite powder and CL and the water-binder ratio, while it is inversely related to the amount of NaOH. Notably, when the NaOH dosage is 1%, the slurry fails to set. With an increase in the dosage of zeolite powder and NaOH, the fluidity of the slurry is significantly enhanced. Conversely, a higher CL dosage and water-binder ratio lead to a decline in flowability and an increase in the slurry's viscosity. This insight is crucial for maximizing the workability of the grouting material under varying conditions. 2. The compressive strength of the slurry stone bodies gradually decreases with an increasing zeolite powder dosage and water-binder ratio. Conversely, an increase in the CL dosage enhances the compressive strength of the stone bodies. At the same time, the impact of NaOH doping on the compressive strength of the stone bodies initially increases, followed by a subsequent decrease. At a 5% doping level, the compressive strength of the stone bodies reaches a maximum of 17.59 MPa after 28 days. The compressive strength of this grout is compatible with silty mudstone, making it suitable for reinforcing silty mudstone slopes without the risk of secondary cracking along the material interface. 3. In the case of alkali-activated GGBFS-zeolite powder slurry, the water-binder ratio is identified as a key factor influencing performance indices. The correlation between each performance index of the grouting material and the optimal mix ratio is, in descending order, as follows: compressive strength, flowability, final setting time, initial setting time and bleeding rate. The optimal mix ratio is zeolite powder:GGBFS:calcium lignosulphonate (CL):NaOH = 30:70:5:7, with a water-binder ratio of 0.6. This mix ratio not only meets the specification requirements but also provides a cost-effective and environmentally sustainable solution, utilizing widely available industrial byproducts. Future efforts will focus on validating the optimal alkali-activated GGBFS-zeolite powder slurry ratio for practical use, alongside studies on shrinkage, durability, and adaptability to different construction environments. Additionally, life cycle assessments or CO\({}_{2}\) emission comparisons with silicate cement will be conducted to evaluate the environmental sustainability of the slurry. Conceptualization, L.W., H.F. and Q.G. ; data curation, G.Y. and J.L. ; formal analysis, L.W. and J.L. ; funding acquisition, H.F. and L.W. ; investigation, J.S. and Y.L. ; methodology, Q.G. and J.T. ; project administration, Q.G. ; resources, J.T. ; validation, L.W. and G.Y. ; visualization, G.Y. ; writing--original draft, L.W. and J.L. ; writing--review and editing, H.F., Q.G. and Y.L. All authors have read and agreed to the published version of the manuscript. This research was funded by the National Natural Science Foundation of China (Nos. 52378440, 42477143); the Natural Science Foundation of Hunan Province (No. 2023J10045); the Key Science and Technology Program in the Transportation Industry (Nos. 2022-MS1-032, 2022-MS5-125); the Project Fund Practical Innovation and Entrepreneurship Enhancement Program of Changsha University of Science and Technology, China (No. CLSJCX23009); and the Guangxi KeyResearch and Development Program (No. AB23075184). Not applicable.