## 1 Introduction
[9] prepared geopolymers for mine road construction from open-pit mine pavement aggregate, slag and fly ash and studied their weathering behavior; the results showed that with the slag and alkali activator admixture incremental price, the weathering resistance is enhanced, and the strength meets the requirements of the mine roads. [PERSON] et al. [10] used fly ash and granulated blast furnace slag to prepare geopolymer for pavement subgrade construction and investigated its road performance, which showed that the UCS of geopolymer-stabilized soils reached 5.1 MPa under the optimal proportioning and good resistance to freezing and thawing. [PERSON] et al. [11] used waste incineration slag to prepare a geopolymer for stabilizing waste incineration slag-gravel mixes. The results showed that the strength of the mixes without natural debris met the criteria for pavement subgrade when the dosage of the geopolymer was 12-14%. In addition, the geopolymer significantly reduced the leaching of harmful heavy metals. [PERSON] et al. [12] used rubberwood fly ash to prepare a geopolymer for the preparation of geopolymer-stabilized marginal laterite subgrade material and tested its mechanical properties. The results showed that the UCS and ITS (indirect tensile strength) of this base material were optimized when the dosage of the geopolymer was 30% and the ratio of sodium silicate to sodium hydroxide was 7:3. [PERSON] et al. [13] studied the influencing factors of the UCS of a geopolymer, and the results indicated that 48 h of thermal curing did not significantly affect the UCS of geopolymers. [PERSON] et al. [14] explored the effect of different silane coupling agents and dosage metakaolin-based geopolymers on waterproof performance. The results show that any silane coupling agent has the right amount of doping to improve the water resistance and contact angle of the capillary. [PERSON] et al. [15] studied the feasibility of using a geopolymer prepared by jarofix to solidify soil. The results show that jarofix can prepare a geopolymer to solidify soil, and when the content of jarofix is 15%, it can be used for Indian road subbase and subgrade construction. [PERSON] et al. (2016) explored the feasibility of adding eggshell ash and rice husk ash to a geopolymer to solidify laterite for road subgrade construction. The results show that this geopolymer stabilization method has the potential to replace cement stabilization. [PERSON] et al. (2017) used a metakaolin-based geopolymer and open-graded aggregate concrete to make up for the lack of asphalt and ordinary Portland cement for load-bearing water storage pavement. The results show that mixing open-graded aggregates with geopolymers produces the desired CGOA when the proportions are right. [PERSON] et al. (2018) used a geopolymer to stabilize low-plastic soil. The results show that this kind of geopolymer has the potential to stabilize low-plastic soil, and this kind of geopolymer can reduce the pavement thickness when it is used in the design of low-traffic roads. [PERSON] et al. (2019) explored the implication of PE fiber and an asphalt emulsifier on the rheological-strength-ductility of geopolymers. The results show that the plasticity of the geopolymer composites is improved due to adding the PE fiber, the strength increases with the raising asphalt emulsifier dosage, and the asphalt emulsifier can balance the ductility and rheological properties. [PERSON] et al. (2019) used the life cycle assessment method to explore the impacts of the use of geopolymers in roads on the environment. By comparing four kinds of road base stabilization materials, it is concluded that the use of geopolymers in road engineering has a positive impact on global warming. [PERSON] et al. (2018) used fly ash and red mud to make a geopolymer and verified its feasibility for road subgrade construction through laboratory tests. The results indicate that the highest UCS of a geopolymer can reach 2.7 MPa, can meet the strength requirements, and can be used as roadbed materials. [PERSON] et al.