Texas Department of Transportation Fly Ash Database and the Development of Chemical Composition–Based Fly Ash Alkali-Silica Reaction Durability Index

Du, Lianxiang; Lukefahr, Elizabeth; Naranjo, Andy

doi:10.1061/(asce)mt.1943-5533.0000564

Cited by 12 publications

(1 citation statement)

References 14 publications

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“…The chemical composition-iron content-and long exposure to high boiler temperatures determine the general characteristics of fly-ash particles (Fisher et al 1976). Acosta et al (2003), Aineto et al (2005Aineto et al ( , 2006, Amonette et al (2003), Bin-Shafique et al (2002), Cheerarot and Jaturapitakkul (2004), Cousens and Stewart (2003), Yudhbir (2006), DiGioia Jr. et al (1995), Du et al (2013), Gray and Lin (1972), Kaniraj and Gayathri (2004), Kim and Prezzi (2008), Kim et al (2005), Mishra and Das (2008), Mishra and Karanam (2006), Palmer et al (2000), Pandian (2004), Prashanth et al (2001), Premchitt and Evans (1995), Reyes and Pando (2007), Senol et al (2003), Siddique et al (2007), Torrey (1978), Trivedi and Sud (2004), Trivedi and Sud (2007), Tu et al (2007), and Young (1993 . These hollow particles imply gas generation in the presence of a molten mineral; indeed, a molten phase and the concurrent release of CO 2 gas occur between 1,200°C-1,400°C during coal burning (Lin et al 1994;Song et al 2011).…”

Section: General Characteristics: Index Propertiesmentioning

confidence: 99%

Characterization and Engineering Properties of Dry and Ponded Class-F Fly Ash

Bachus

Terzariol

Pastén

et al. 2019

J. Geotech. Geoenviron. Eng.

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Characterization studies conducted on Class-F fly-ash specimens gathered from different producers in the southeastern United States confirm general trends reported for fly ash worldwide. Additional tests and detailed analyses explain the spread in specific gravity (interparticle porosity cenospheres), highlight the tendency to segregation and layering, and show marked ferromagnetism. Furthermore, data show that early diagenetic cementation-within days after wetting-hinders densification and produces a fabric that is prone to collapse. New procedures are specifically developed to diagnose and characterize early diagenesis, including (1) pH measurements as an indicator of diagenetic potential, (2) test protocols to assess early diagenesis using oedometer tests and shear-wave velocity, and (3) procedures to determine realizable unit weights as reference values for the analyses of contractive or dilative tendencies and instability. In the absence of early diagenetic cementation, dilative fly-ash behavior is expected in the upper ≈20 m under monotonic shear loading. Flow instability may follow the failure of the containment structure if the ponded ash is saturated and has experienced hindered densification.

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