Elastic and Deformation Characteristics of MSWI Bottom Ash for Road Construction

V T Phan,T T H Nguyen

doi:10.48084/etasr.3817

V T Phan, T T H Nguyen

Open Access

https://doi.org/10.48084/etasr.3817

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Abstract

Bottom ash from Municipal Solid Waste Incineration (MSWI) is a typical granular material resulting from the incineration of domestic waste. It is mainly used in road engineering substituting traditional natural aggregates. As the characterization of the mechanical behavior is essential, the work presented in this paper pursues the study of the elastic and deformation characteristics of bottom ash, in particular Young’s modulus and Poisson’s ratio. From the consolidated-drained triaxial test data, it was possible to extract fundamental material parameters about the samples, including their Young’s modulus E0.2 and E50, its Poisson’s ratio ν, and its maximum deviatoric stress peak. These parameters were then used in computer models to predict how the bottom ash will behave in a larger-scale engineering application. Furthermore, the mechanical behavior of bottom ash related to road construction’s loading condition, especially the secant modulus, was detailed.

Highlights

Waste management has become a major preoccupation of federal and state agencies
This study aims to study the elastic and deformation characteristics of bottom ash
For large strains without localization phenomenon, it can be assumed that all the curves tend towards a horizontal asymptote. These responses indicate that the mechanical behavior of bottom ash is similar to that of dense sand [3, 15, 25, 26]

Summary

Introduction

Waste management has become a major preoccupation of federal and state agencies. It consists mainly of construction waste, fly ash and bottom ash [1,2,3,4,5,6,7,8,9,10,11]. Bottom ash from Municipal Solid Waste Incineration (MSWI) is the solid residue from the combustion of municipal waste It consists mainly of silica and alumina, limestone, lime, water, salt, heavy metals and unburned wastes [6, 12,13,14]. The triaxial testing method is described, and the basic parameters of bottom ash (elastic and volumetric parameters) are calculated. These results are discussed by analyzing and simulating the corresponding formula of Schanz and Vermeer [20]

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