[1] [1] RAJ A, SATHYAN D, MINIK M. Physical and functional characteristics of foam concrete: a review[J]. Constr Build Mater, 2019, 221: 787-799.

[2] [2] SANG G C, ZHU Y Y, YANG G, et al. Preparation and characterization of high porosity cement-based foam material[J]. Constr Build Mater, 2015, 91: 133-137.

[3] [3] ZHANG X Z, YANGQ, SHI Y Y, et al. Effects of different control methods on the mechanical and thermal properties of ultra-light foamed concrete[J]. Constr Build Mater, 2020, 262: 120082.

[5] [5] ROBAYO-SALAZAR R A, RIVERA J F, MEJADEGUTIRREZR. Alkali-activated building materials made with recycled construction and demolition wastes[J]. Constr Build Mater, 2017, 149: 130-138.

[7] [7] LUUKKONEN T, ABDOLLAHNEJAD Z, YLINIEMI J, et al. One-part alkali-activated materials: a review[J]. Cem Concr Res, 2018, 103: 21-34.

[9] [9] LIC, SUN H H, LI L T. A review: the comparison between alkali-activated slag (Si+Ca) and metakaolin (Si+Al) cements[J]. Cem Concr Res, 2010, 40(9): 1341-1349.

[10] [10] YANG K H, LEE K H, SONG J K, et al. Properties and sustainability of alkali-activated slag foamed concrete[J]. J Clean Prod, 2014, 68: 226-233.

[15] [15] XU H, VAN DEVENTER J S J. The geopolymerisation of alumino- silicate minerals[J]. Int J Miner Process, 2000, 59(3): 247-266.

[18] [18] KRIEGER I M, DOUGHERTY T J. A mechanism for non-Newtonian flow in suspensions of rigid spheres[J]. Trans Soc Rheol, 1959, 3(1): 137-152.

[20] [20] SHEW, ZHANG Y S, JONES M R. Using the ultrasonic wave transmission method to study the setting behavior of foamed concrete[J]. Constr Build Mater, 2014, 51: 62-74.

[21] [21] VOORHEES P W. The theory of Ostwald ripening[J]. J Stat Phys, 1985, 38(1): 231-252.

[22] [22] CARSON J K, LOVATT S J, TANNER D J, et al. Thermal conductivity bounds for isotropic, porous materials[J]. Int J Heat Mass Transf, 2005, 48(11): 2150-2158.