Recycling Stabilized Fly Ash from Municipal Solid Waste Incineration Facility in Road Hydraulic Materials

Title: Recycling Stabilized Fly Ash from Municipal Solid Waste Incineration Facility in Road Hydraulic Materials
Author(s): Mauget
Paper category : conference
Book title: International RILEM Conference on the Use of Recycled Materials in Building and Structures
Editor(s): E. Vázquez, Ch. F. Hendriks and G.M.T. Janssen
Print-ISBN: 2-912143-52-7
e-ISBN: 2912143756
Publisher: RILEM Publications SARL
Publication year: 2004
Pages: 446 - 454
Total Pages: 9
Nb references: 3
Language: English

Abstract: In France, purification of gazes produced by incineration of household waste generates
more than 300 000 tons a year of solid residues. Considered as ultimate and hazardous waste
they must therefore be stored in a specific so-called Class I confined landfill after stabilization
with hydraulic binders. The cost of this solution incites some companies to investigate
different processes to entrap the potential toxic substances, such as heavy metals, available
in municipal solid waste incineration fly ashes (MSWFA) to make their storage cheaper or
even their re-use possible.
This paper presents some results obtained within the project Revasol leaded by Solvay
company which has developed such a process, NOVOSOL®, for minerals residues
stabilization. After a brief description of the process, which mainly consists in a washing step,
followed by the addition of phosphoric acid and a thermal treatment, the paper presents a
laboratory study where so-treated MSWFA were introduced as replacement of fine particles
in well-graded hydraulic materials dedicated to road bedding courses. The interest on the
mechanical point of view of such a replacement is confirmed on two 30-meter long road
sections incorporating graded-aggregate treated with an hydraulic binder, one with treated
MSWFA and the second without.

Online publication: 2004-09-29
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143756.050