Effect of high temperature on the mechanical properties of hierarchical porous cenosphere/geopolymer composite foams

Abstract

Geopolymer, a type of inorganic amorphous aluminosilicate polymer, is prepared by mixing aluminosilicate materials (such as fly ash, metakaolin, slag, etc) from alkaline activation reaction. [1][2][3][4] Recently, geopolymer foams have gained increasing interest since they exhibit low density, low CO 2 emissions, high mechanical strength and thermal stability, etc. Moreover, geopolymer shows good chemical resistance like ceramic foam. [5][6][7] Geopolymer foams can be produced by various methods such as sacrificial template method, adding pore-forming agent and direct-foaming method. [8][9][10] Attributing to its unique structure of closed cells, geopolymer foam with typical component can be applied in fire resistance

Development and Characterization of Lightweight Geopolymer Composite Reinforced with Hybrid Carbon and Steel Fibers

“…Concrete, including the geopolymer one, is considered light when its dry density is within the range of 800–2000 kg/m 3 [ 20 , 21 ]. Examples of aggregates that can be used to obtain geopolymeric materials with relatively high strength and low density are microspheres [ 22 , 23 , 24 , 25 , 26 , 27 ], vermiculite [ 28 , 29 ], granulated foam glass [ 30 , 31 , 32 ], expanded polystyrene (Styrofoam) [ 29 , 33 ], pumice [ 34 , 35 ], perlite [ 36 , 37 , 38 ], and other expanded materials, e.g., clay or glass [ 39 , 40 , 41 ].…”

“…Additionally, the microspheres have the ability to dampen vibrations and do not have any harmful effects on living organisms. Due to their numerous and sought-after properties, microspheres can be used as a light filler, improving the thermal insulation properties of mortars and concretes [ 22 , 23 , 24 , 27 ].…”

Taguchi- Grey relational analysis for Optimizing the Compressive Strength and Porosity of Metakaolin-Based Geopolymer

“…The synthesis of highly porous geopolymer generally involves the addition of blowing agents to the geopolymer paste, such as hydrogen peroxide (H2O2), metallic powders (aluminum and zinc). The addition of these agents in the geopolymer synthesis process affects the polymerization kinetics as well as the rheology of the produced paste [8][9][10][11][12][13][14][15][16][17].…”