[7] [7] DAVIDOVITS J. Geopolymers: ignorganic polymeric new materials［J］. Therm Anal, 1991, 37(8):1633-1656．

[8] [8] JINDAL B B. Investigations on the properties of geopolymer mortar and concrete with mineral admixtures: a review［J］. Construction and Building Materials, 2019, 227: 116644.

[11] [11] LEONG H Y, ONG D E L, SANJAYAN J G, et al. Suitability of Sarawak and Gladstone fly ash to produce geopolymers: a physical, chemical, mechanical, mineralogical and microstructural analysis［J］. Ceramics International, 2016, 42(8): 9613-9620.

[14] [14] LIU Z, WANG J X, JIANG Q K, et al. A green route to sustainable alkali-activated materials by heat and chemical activation of lithium slag［J］. Journal of Cleaner Production, 2019, 225: 1184-1193.

[15] [15] PACHECO-TORGAL F, JALALI S. Nanotechnology: advantages and drawbacks in the field of construction and building materials［J］. Construction and Building Materials, 2011, 25(2): 582-590.

[16] [16] DUAN P, YAN C J, LUO W J, et al. Effects of adding nano-TiO2 on compressive strength, drying shrinkage, carbonation and microstructure of fluidized bed fly ash based geopolymer paste［J］. Construction and Building Materials, 2016, 106: 115-125.

[17] [17] TIMAKUL P, RATTANAPRASIT W, AUNGKAVATTANA P. Enhancement of compressive strength and thermal shock resistance of fly ash-based geopolymer composites［J］. Construction and Building Materials, 2016, 121: 653-658.

[18] [18] YANG L Y, JIA Z J, ZHANG Y M, et al. Effects of nano-TiO2 on strength, shrinkage and microstructure of alkali activated slag pastes［J］. Cement and Concrete Composites, 2015, 57: 1-7.

[20] [20] FANG Y H, LU Z L, WANG Z L. FT-IR study on early-age hydration of alkali-activated slag cement［J］. Key Engineering Materials, 2011, 492: 429-432.