Manufacturing of Low-Carbon Binders Using Waste Glass and Dredged Sediments: Formulation and Performance Assessment at Laboratory Scale

Abstract

Few studies focus on the co-valorization of river dredging sediments (DS) and residual waste glass (RWG) in alkali-activated binders. This study investigates the use of DS as an aluminosilicate source by substituting a natural resource (metakaolin (MK)), while using RWG as an activator (sodium silicate source). Suitable treatments are selected to increase the potential reactivity of each residue. The DS is thermally treated at 750 °C to promote limestone and aluminosilicate clays’ activation. The RWG (amorphous, rich in silicon, and containing sodium) is used as an alkaline activator after treatment in 10 M NaOH. Structural monitoring using nuclear magnetic resonance (29NMR and 27NMR), X-ray diffraction, and leaching is conducted to achieve processing optimization. In the second stage, mortars were prepared and characterized by determining compressive strength, water absorption, mercury porosimetry and Scanning Electron Microscopy with Energy Dispersive Spectroscopy (SEM-EDS). Results obtained show the great advantage of combining RWG and DS in an alkali-activation binder. The treated RWG offers advantages when used as sodium silicate activating solution, while the substitution of MK by calcined sediments (DS-750 °C) at 10%, 20%, and 30% leads to improvements in the properties of the matrix such as an increase in compressive strength and a refinement and reduction of the pore size within the matrix.

Effect of Salt Solution Erosion on Mechanical Properties and Micropore Structure of Recycled Fine Aggregate ECC

“…The refinement of the pore structure had a positive effect on the mechanical and durability properties of the specimens [ 40 , 41 ]. When the specimen underwent erosion and erosion products were generated, there was enough space inside the specimen to store these erosion products after 20 cycles of dry–wet cycling.…”

Optimization of an Eco-Friendly Hydraulic Road Binders Comprising Clayey Dam Sediments and Ground Granulated Blast-Furnace Slag

“…Figure 3 shows that the mass loss became very negligeable (almost equal to zero) after 1 h of thermal treatment, which indicates that the various decomposition stages (loss of organic matter, dihydroxylation of clay minerals, and decarbonation of CaCO 3 ) were been completed [4,31] Therefore, the calcination was set for a duration of 1 h at a temperature of 800 • C [4] to ensure an optimal pozzolanic reactivity and to avoid the risk of recrystallization.…”

“…The durability of mixes is related to their permeability. Moreover, the strength properties and freeze-thaw resistance strongly depend on their porous system [4,31]. Table 10 shows that the porosity has decreased with the curing time.…”

Advancements in Heavy Metal Stabilization: A Comparative Study on Zinc Immobilization in Glass-Portland Cement Binders

“…Indeed, their use has proven to be beneficial in stabilizing the structure of concrete and decreasing its carbonation and chloride diffusion [ 6 , 7 ]. Ground-glass pozzolan has been used both in conventional cementitious matrixes and as a source of silicate in alkali-activated binders [ 8 , 9 , 10 , 11 ]. Nevertheless, the effect of GP on the stabilization of pollutants, such as metallic and metalloid trace elements (MMTEs), and on organic pollutants has not been reported to date.…”