Study of the Formulation and Properties of Concrete Based on Incinerator Bottom Ash Subjected to Forced Carbonation PhD Imad Eddine KANJO

Study of the Formulation and Properties of Concrete Based on Incinerator Bottom Ash Subjected to Forced Carbonation.

This research aims to investigate the formulation and properties of concrete incorporating incinerator bottom ash (IBA) that has undergone forced carbonation. The primary objective is to improve the mechanical performance, durability, and sustainability of these materials by optimizing the carbonation process. The study also seeks to enhance the valorization of IBA, a byproduct of municipal solid waste incineration, by stabilizing its composition and reducing its environmental impact.

The carbonation process is based on the reaction between calcium-containing compounds in IBA and CO₂, leading to the formation of stable carbonates. This transformation reduces the leaching potential of heavy metals while enhancing the mechanical and physicochemical properties of cementitious materials. Forced carbonation at an early stage involves exposing the material to controlled CO₂ conditions, accelerating the reaction kinetics and promoting the formation of calcium carbonate within the matrix.

The core phase of the research focuses on analyzing the carbonation mechanisms in both cementitious matrices and IBA under controlled conditions. The study aims to determine the optimal parameters—CO₂ concentration, humidity, temperature, exposure time, and material composition—to maximize CO₂ uptake and improve the material's physical and mechanical properties. Experimental work will be conducted at a laboratory scale, where mass variations will be monitored using techniques such as thermogravimetric . Advanced characterization methods, including microstructural observations and mechanical testing, will be used to assess the effects of carbonation on the performance of the treated concrete.

Beyond material performance, a comprehensive environmental assessment of the forced carbonation process will be carried out. This evaluation will quantify the carbon sequestration potential, energy consumption, and environmental benefits associated with integrating carbonated IBA into concrete. The results of this study will contribute to the development of more sustainable construction materials by promoting the reuse of industrial byproducts and reducing the carbon footprint of concrete production.

Publications

Accelerated carbonation of municipal solid waste incineration bottom ash for alternative aggregate production (https://hdl.handle.net/2268/324160)

Amélioration des propriétés physiques des mâchefers d'incinérateur d'ordures ménagères par carbonatation accélérée: conditions et propriétés (https://hdl.handle.net/2268/321048)