Study of Fly Ash Geopolymer and Fly Ash/Slag Geopolymer in Term of Physical and Mechanical Properties

Hui-Teng, Ng; Cheng-Yong, Heah; Abdullah, Mohd Mustafa Albakri; Yong-Sing, Ng; Bayuaji, Ridho

doi:10.36868/ejmse.2020.05.04.187

Cited by 7 publications

(3 citation statements)

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“…Furthermore, the appearance of cristobalite was due to unreacted quartz (SiO 2 ) after the decomposition of kaolinite at 900 °C [ 25 ]. The liberation of SiO 2 corresponded to the kaolinite–mullite transformation, which yields to Al–Si spinel phase [ 26 ]. This was corroborated with the elemental distribution analysis obtained using micro-XRF, as the sintered kaolin geopolymer ceramic samples showed a high intensity at the Si and Al regions at 1100 °C ( Figure 7 c).…”

Section: Resultsmentioning

confidence: 99%

The Influence of Sintering Temperature on the Pore Structure of an Alkali-Activated Kaolin-Based Geopolymer Ceramic

et al. 2022

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Geopolymer materials are used as construction materials due to their lower carbon dioxide (CO2) emissions compared with conventional cementitious materials. An example of a geopolymer material is alkali-activated kaolin, which is a viable alternative for producing high-strength ceramics. Producing high-performing kaolin ceramics using the conventional method requires a high processing temperature (over 1200 °C). However, properties such as pore size and distribution are affected at high sintering temperatures. Therefore, knowledge regarding the sintering process and related pore structures on alkali-activated kaolin geopolymer ceramic is crucial for optimizing the properties of the aforementioned materials. Pore size was analyzed using neutron tomography, while pore distribution was observed using synchrotron micro-XRF. This study elucidated the pore structure of alkali-activated kaolin at various sintering temperatures. The experiments showed the presence of open pores and closed pores in alkali-activated kaolin geopolymer ceramic samples. The distributions of the main elements within the geopolymer ceramic edifice were found with Si and Al maps, allowing for the identification of the kaolin geopolymer. The results also confirmed that increasing the sintering temperature to 1100 °C resulted in the alkali-activated kaolin geopolymer ceramic samples having large pores, with an average size of ~80 µm3 and a layered porosity distribution.

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Section: Resultsmentioning

confidence: 99%

The Influence of Sintering Temperature on the Pore Structure of an Alkali-Activated Kaolin-Based Geopolymer Ceramic

et al. 2022

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“…The density was measured as the ratio between the sample mass obtained by weighing with an electronic balance and the volume with a regular shape that is easy to calculate [21]. Using the ASTM C642-97 standard, the apparent porosity was determined by dividing the difference between wet weight and dry weight by the difference between wet weight and suspended weight of the sample [5]. Thermal conductivity was measured at room temperature using the heat-flow-meter HFM448 Lambda (SR EN 1946-3:2004).…”

Section: Methodsmentioning

confidence: 99%

“…According to [5], geopolymer concrete made with fly ash and blast furnace slag had higher strength compared to geopolymer made with fly ash due to higher bulk and blast furnace slag-geopolymer concrete density (2055-2100 kg•m -3 ) and lower apparent porosity (about 17 %) and water absorption (about 7 vol. %).…”

Section: Introductionmentioning

confidence: 99%

"Microsilica and steel dust as nano- and micro-particles addition for increasing the mechanical strength of fly ash and blast furnace slag-geopolymer concrete"

PĂUNESCU¹,

PĂUNESCU²,

VOLCEANOV³

2023

RRIC/RJCE

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The paper is a contribution to developing the manufacturing technique of fly ash and blast furnace slag-geopolymer concrete with compressive strength increased up to 73 MPa and flexural strength reaching 12.1 MPa (after 180 days of curing) by adding low amounts of nanosilica (20-50 nm) and steel dust (1-5 μm) captured from electric arc furnace exhaust gases. The originality of the work consists in combining the concrete production technique by using alumino-silicate industrial by-products (ash and slag) with the addition of nano or micro-particles in order to significantly increase the mechanical strength of geopolymer concrete.

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Exploring the Potential of Geopolymer Binders: A Study on Basic Oxygen Furnace Slag and Fly Ash Mixes

Subramanian,

Davis,

Thomas

2024

Iran J Sci Technol Trans Civ Eng

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Study of Fly Ash Geopolymer and Fly Ash/Slag Geopolymer in Term of Physical and Mechanical Properties

Cited by 7 publications

References 0 publications

The Influence of Sintering Temperature on the Pore Structure of an Alkali-Activated Kaolin-Based Geopolymer Ceramic

The Influence of Sintering Temperature on the Pore Structure of an Alkali-Activated Kaolin-Based Geopolymer Ceramic

"Microsilica and steel dust as nano- and micro-particles addition for increasing the mechanical strength of fly ash and blast furnace slag-geopolymer concrete"

Exploring the Potential of Geopolymer Binders: A Study on Basic Oxygen Furnace Slag and Fly Ash Mixes

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