Journal ArticleDOI
Geotechnical Properties of Fly and Bottom Ash Mixtures for Use in Highway Embankments
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In this paper, the authors collected samples of class F fly and bottom ash from two utility power plants in Indiana and tested for their mechanical properties (compaction, permeability, strength, stiffness, and compressibility).Abstract:
Class F fly ash and bottom ash are the solid residue byproducts produced by coal-burning electric utilities. They are usually disposed of together as a waste in utility disposal sites with a typical disposal rate of 80% fly ash and 20% bottom ash. Direct use of these materials in construction projects consuming large volumes of materials, such as highway embankment construction, not only provides a promising solution to the disposal problem, but also an economic alternative to the use of traditional materials. Representative samples of class F fly and bottom ash were collected from two utility power plants in Indiana and tested for their mechanical properties (compaction, permeability, strength, stiffness, and compressibility). Three mixtures of fly and bottom ash with different mixture ratios (i.e., 50, 75, and 100% fly ash content by weight) were prepared for testing. Test results indicated that ash mixtures compare favorably with conventional granular materials.read more
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Progressive utilisation prospects of coal fly ash: A review
TL;DR: The present review elucidates the role of CFA as an emerging input in delivering eco-friendly amenities and future derivatives and focuses on impending applications such as synthesis of geopolymers, silica aerogels, carbon nanotubes for electronic devices, and the separation of radioactive isotopes as well as rare earth elements from CFA.
BookDOI
Characterization of Cementitiously Stabilized Layers for Use in Pavement Design and Analysis
TL;DR: In this article, the characterization of cementitiously stabilized layers and the properties that influence pavement performance are discussed, as well as performance-related procedures for characterizing these layers and performance-prediction models for incorporation into the mechanistic-empirical pavement analysis methods.
Journal ArticleDOI
Physical, chemical, and geotechnical properties of coal fly ash: A global review
Arpita H. Bhatt,Sharon Priyadarshini,Aiswarya Acharath Mohanakrishnan,Arash Abri,Melanie L. Sattler,Sorakrich Techapaphawit +5 more
TL;DR: In this paper, the authors summarized available literature concerning physical and chemical and geotechnical properties of fly ash which affect its options for re-use and reported that fly ash more often is poorly graded than well graded; fly ash from India in particular tends to be poorly graded.
Journal ArticleDOI
Stabilization of a Clayey Soil with Fly Ash and Lime: A Micro Level Investigation
TL;DR: In this article, the improvement in the strength of a locally available cohesive soil by addition of both fly ash and lime was reported, and micro level analysis confirmed the breaking of montmorrillonite structure present in the untreated clay after stabilization.
Journal ArticleDOI
Reuse options for coal fired power plant bottom ash and fly ash
TL;DR: In this paper, the authors reviewed reuse options for coal fly ash and coal bottom ash and found that less than 30% of coal ash produced is reused, while coal ash is mainly reused in civil engineering applications such as road construction, embankments, construction materials, geo-polymer applications and in cement production.
References
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Journal ArticleDOI
The strength and dilatancy of sands
TL;DR: In this paper, the strength and dilatancy of 17 sands in axisymmetric or plane strain at different densities and confining pressures are collated, and the critical state angle of shearing resistance of soil which is shearing at constant volume is determined experimentally within a margin of about 1°, being roughly 33° for quartz and 40° for feldspar.
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Shear strength and stiffness of silty sand
TL;DR: In this article, the effects of nonplastic fines on the small-strain stiffness and shear strength of Ottawa sand were investigated. Butts et al. used Bender element tests performed in triaxial test samples allowed assessment of the effect of fine content on small-strain mechanical stiffness.
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Effects of nonplastic fines on static liquefaction of sands
Poul V. Lade,Jerry A. Yamamuro +1 more
TL;DR: In this article, a triaxiaux en compression non draines ont ete effectues on des echantillons reconstitues de sable du Nevada and d'Ottawa, avec variation systematique de la teneur en fines (particules inferieures a 0,074 mm) afin d'evaluer l'effet de la fraction fine sur le potentiel de liquefaction statique lors d'un chargement monotonique.