Effect of fly-ash based geopolymer coated aggregate on bituminous mixtures

doi:10.14256/jce.1678.2016

Cited by 2 publications

(3 citation statements)

References 11 publications

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“…The surface morphology and microstructure changes in all modified binders were observed and analyzed using the NOVA NANOSEM 230 equipment as shown in Fig 3 . The Scanning Electron Microscope (SEM) utilizes signals resulting from interactions between electrons and the sample to visualize and analyze various aspects, including the external morphology (texture), chemical composition, crystalline structure, and material orientation within the samples. This powerful imaging technique provides valuable insights into the microscopic properties of materials [19].…”

Section: Test Methodsmentioning

confidence: 99%

Microstructural Characteristics of Fly Ash Geopolymer Modified Asphalt Binder

Bujang,

Aman,

Mohamad Taher

et al. 2023

IJIE

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The incorporation of by-product materials, such as fly ash geopolymer, has a significant influence on the properties of asphalt binder. This results in a reduction in binder viscosity and an increase in binder stiffness. This, in turn, promotes enhanced aggregate-asphalt binder bonding. Geopolymer refers to a class of inorganic materials characterized by the formation of a long-range, covalently bonded non-crystalline skeleton. The aim of this study was to explore the potential of incorporating waste and by-product materials, specifically fly ash geopolymer additive, in order to influence the microstructure of asphalt binder. The focus was on examining how the inclusion of fly ash geopolymer could alter the internal arrangement and composition of the asphalt binder, leading to potential improvements in its properties and performance. Laboratory experiments were performed to analyze the microstructure of 60/70 and 80/100 asphalt binder samples using Scanning Electron Microscope (SEM) imaging. These samples were modified with various concentrations (3%, 5%, 7%, 9%, and 11%) of fly ash geopolymer additive. The SEM images were obtained to examine the morphological changes and assess the distribution of the fly ash geopolymer particles within the asphalt binder matrix at different additive concentrations. The NOVA NANOSEM 230 equipment was utilized to determine the morphological characteristics of the asphalt binders. The results showed notable variations in the properties of the asphalt binders modified with fly ash geopolymer compared to the unmodified control asphalt binder. The morphological evaluation revealed thorough blending of the fly ash geopolymer additive. Notably, the micrographs demonstrated a denser structure with increased percentages of fly ash geopolymer, indicating a presence of fly ash and alkaline activator promotes the rapid formation of polymerization. These findings emphasize the promising potential of fly ash geopolymer as an additive in asphalt binder. The significant effect it has on viscosity when incorporated into modified asphalt binder makes it a valuable candidate for application in the field.

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Section: Test Methodsmentioning

confidence: 99%

Microstructural Characteristics of Fly Ash Geopolymer Modified Asphalt Binder

Bujang,

Aman,

Mohamad Taher

et al. 2023

IJIE

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“…In addition, Dayal et al, [3] found that the incorporating of fly ash geopolymer affect the complex shear modulus of asphalt binder. Furthermore, the result showed that the rutting factor on modified asphalt binder also increased compare to virgin asphalt binder.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, the result showed that the rutting factor on modified asphalt binder also increased compare to virgin asphalt binder. Dayal et al, [3] also stated that the bituminous mixtures containing fly ash geopolymer show better resistance to permanent deformation, which points to their higher potential rutting resistance and longer fatigue life. Thus, the addition of fly ash geopolymer into the asphalt mixture is expected to decrease the rate of rutting due to the increase in softening point [4][5].…”

Section: Introductionmentioning

confidence: 99%

Effects of Fly Ash Geopolymer Hot Mix Asphalt Additive on the Rheological Properties of Unaged and Short-Term Aged Asphalt Binder

Hazirah Bujang,

Mohamad Yusri Aman,

Mohammad Nasir Mohamad Taher

et al. 2023

ARAM

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Asphalt pavement has the advantages of driving comfort and convenient maintenance, which has been widely applied to highway construction. However, due to the continuously increased traffic volume, it is recognized that asphalt binder and mixtures with enhanced characteristics are needed to guarantee the durability of the functional performance of transportation infrastructures. This study was carried to evaluate the effect of fly ash geopolymer additive on the rheological properties of unaged and short-term aged asphalt binder. In the respect, asphalt binder 80/100 and 60/70 penetration grade with 0, 3, 5, 7, 9 and 11% fly ash geopolymer by weight of asphalt binder were prepared. The results indicated that the addition of FAG significantly increases the stiffness (G*) and decreases the phase angle (δ) for both unaged and short-term aged modified asphalt binder compared to the control asphalt binder. This can be proved that presence of FAG significantly improved rutting parameter i.e G*/sin δ compared to control in which capable to resist rutting at higher temperature. In terms of failure temperature, highest failure temperature of 9% FAG modified asphalt binder indicated that the binder is less susceptible to be rutting at high pavement temperature for both unaged and short-term aged, respectively. Overall research conclusions are that 9% of FAG is proposed as the minimal content to be used as an additive in asphalt binder for further mixture evaluations.

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Effect of fly-ash based geopolymer coated aggregate on bituminous mixtures

Cited by 2 publications

References 11 publications

Microstructural Characteristics of Fly Ash Geopolymer Modified Asphalt Binder

Microstructural Characteristics of Fly Ash Geopolymer Modified Asphalt Binder

Effects of Fly Ash Geopolymer Hot Mix Asphalt Additive on the Rheological Properties of Unaged and Short-Term Aged Asphalt Binder

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