Foamed geopolymer: The relationship between rheological properties of geopolymer paste and pore-formation mechanism

Gu, Gonghui; Xu, Fang; Huang, Xiaoming; Ruan, Shaoqin; Peng, Chao; Lin, Juntao

doi:10.1016/j.jclepro.2020.123238

Cited by 75 publications

(12 citation statements)

References 38 publications

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“…Additionally, it opens up new areas of application such as when used as foam ceramics for construction walls or for keeping a water cooling system. Both structural and constructional areas can be addressed by geopolymer composites [74][75][76][77][78][79][80].…”

Section: Discussionmentioning

confidence: 99%

An Application Review of Fiber-Reinforced Geopolymer Composite

Samal

Blanco

2021

Fibers

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Fiber-reinforced geopolymer composites (FRGCs) were considered in terms of application in various areas, and a review is presented in this article. FRGCs are emerging as environmentally friendly materials, replacing cement in the construction industry. An alternative inorganic binder such as a geopolymer matrix promotes environmental awareness on releasing less CO2. The inorganic matrix geopolymer is considered a greener cement for FRGCs. Various types of fiber reinforcements and their role toward the improvement of tensile, flexural, impact strength, fracture toughness, and energy absorption in overall mechanical performance in FRGCs were discussed. FRGCs and their properties in mechanical response, with correlation toward microstructure evolution at room and elevated temperatures, were also discussed. Simultaneously, the durability and impact strength of FRGCs and damage area as a function of the energy absorption were presented with 3D reconstruction images. Moreover, 3D images will cover the internal volume of the FRGCs with internal porosity and fiber orientation. Hybrid fiber reinforcement adds an extra step for the application of geopolymer composites for structural applications.

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Section: Discussionmentioning

confidence: 99%

An Application Review of Fiber-Reinforced Geopolymer Composite

Samal

Blanco

2021

Fibers

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“…Performance of sodium silicate was shown in Table 2. The alkali-activator used in the experiment was obtained by NaOH-modified sodium silicate modulus to 1.2 [14,41,42]. NaOH used in the test is in the solid granular state.…”

Section: Methodsmentioning

confidence: 99%

“…The preparation procedure of fly ash-based geopolymer mortar was illustrated in Figure 2. The modulus of sodium silicate can be adjusted by adding different amounts of NaOH reagent [14,41,42]. In addition, some water was evaporated due to the heat from the mixing process of the NaOH reagent and sodium silicate, Therefore, we used an electronic balance to weigh the mass difference of the alkali-activator before and after cooling, and extra water was added to compensate the weight loss of the water.…”

Section: Preparation Procedures Of Fly Ash-based Geopolymer Mortarmentioning

confidence: 99%

Section: Preparation Procedures Of Fly Ash-based Geopolymer Mortarmentioning

confidence: 99%

“…With respect to the optimal mix ratio of the geopolymer binder in research, the water-binder ratio and binder-sand ratio were adopted as 0.35 and 0.40, respectively. The modulus of sodium silicate was adjusted to 1.2 by NaOH [14,41,42]. The solid mass of the alkali-activator is 14 wt.% to the weight of the geopolymer binder.…”

Section: Ratio Of Fly Ash-based Geopolymer Mortar With Standard Sandsmentioning

confidence: 99%

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Effect of Fine Aggregate Particle Characteristics on Mechanical Properties of Fly Ash-Based Geopolymer Mortar

Gao

et al. 2021

Minerals

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This research aimed to investigate the effect of fine aggregate particles on mechanical properties of fly ash-based geopolymer mortar. In this work, seven kinds of river sand particles were designed based on different fine aggregate characteristics. The fineness modulus was adopted to quantitatively describe the gradation of sands. The fluidity, compressive, flexural, and tensile strengths of geopolymer mortar with different sand gradations were analyzed by laboratory tests. Furthermore, the composition and morphology of fly ash-based geopolymer mortar was analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The reasonable gradation range and filling effect of sand were obtained. The results show that fluidity and compressive and flexural strengths of geopolymer mortar both improve with the increase of the fineness modulus, while specific surface area and voidage are opposite. The tensile strength of mortar largely lies on the interface properties between the geopolymer binder and fine aggregates. When the pass rate of the key sieving size 1.18 mm is 75–95%, the pass rate of the key sieving size 0.15 mm is 15–25%, the fineness modulus is 2.2–2.6 and the appropriate filling coefficient of geopolymer paste is around 1.0–1.15, the comprehensive performance of geopolymer mortar is the best. This research paper could provide a basis for the design of geopolymer mortar based on fly ash, and it is of great significance for its popularization and application.

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Thermomechanical properties of environmentally friendly slag-based geopolymer foam composites in different curing conditions

Ersoy

Çavuş

2023

Environ Sci Pollut Res

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Foamed geopolymer: The relationship between rheological properties of geopolymer paste and pore-formation mechanism

Cited by 75 publications

References 38 publications

An Application Review of Fiber-Reinforced Geopolymer Composite

An Application Review of Fiber-Reinforced Geopolymer Composite

Effect of Fine Aggregate Particle Characteristics on Mechanical Properties of Fly Ash-Based Geopolymer Mortar

Thermomechanical properties of environmentally friendly slag-based geopolymer foam composites in different curing conditions

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