Formulation of mortars based on thermally treated sediments

Benzerzour, M.; Maherzi, Walid; Amar, Mouhamadou; Abriak, N.‐E.; Damidot, D.

doi:10.1007/s10163-017-0626-0

Cited by 25 publications

(24 citation statements)

References 28 publications

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“…It was next dried at 40 • C then grounded to <120 µm. After that the sediment was calcined by using direct calcination at 750 • C [34,35]. The chemical and mineralogical characteristics for these materials are shown in Tables 1 and 2, respectively.…”

Section: • Sedimentsmentioning

confidence: 99%

Mechanical Properties and Microstructure of Low Carbon Binders Manufactured from Calcined Canal Sediments and Ground Granulated Blast Furnace Slag (GGBS)

et al. 2021

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This research study evaluated the effects of adding Scottish canal sediment after calcination at 750 °C in combination with GGBS on hydration, strength and microstructural properties in ternary cement mixtures in order to reduce their carbon footprint (CO2) and cost. A series of physico-chemical, hydration heat, mechanic performance, mercury porosity and microstructure tests or observations was performed in order to evaluate the fresh and hardened properties. The physical and chemical characterisation of the calcined sediments revealed good pozzolanic properties that could be valorised as a potential co-product in the cement industry. The results obtained for mortars with various percentages of calcined sediment confirmed that this represents a previously unrecognised potential source of high reactivity pozzolanic materials. The evolution of the compressive strength for the different types of mortars based on the partial substitution of cement by slag and calcined sediments showed a linear increase in compressive strength for 90 days. The best compressive strengths and porosity were observed in mortars composed of 50% cement, 40% slag and 10% calcined sediment (CSS10%) after 90 days. In conclusion, the addition of calcined canal sediments as an artificial pozzolanic material could improve strength and save significant amounts of energy or greenhouse gas emissions, while potentially contributing to Scotland’s ambitious 2045 net zero target and reducing greenhouse gas emissions by 2050 in the UK and Europe.

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Section: • Sedimentsmentioning

confidence: 99%

Mechanical Properties and Microstructure of Low Carbon Binders Manufactured from Calcined Canal Sediments and Ground Granulated Blast Furnace Slag (GGBS)

et al. 2021

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“…The partial incorporation of Ca in the amorphous silicate phase can also lower the connectivity of the silicate network and as such can modify the NMR spectrum as observed. In MK, DS and DS-750 • C, the chemical shifts of 29 Si around −110 ppm illustrate a significant peak of the -Si-(O-Si) 4 structure type (Q 4 ) corresponding to quartz (sandy part in the sediments) or the Q 4 connected part of the clay minerals [19,31,39,40]. A wide band between −80 and −100 ppm corresponds to a combination of several structures of type Q 3 and Q 2 or structures incorporating Al.…”

Section: Structural Evolution Of 29si By Nmr Analysismentioning

confidence: 99%

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

et al. 2021

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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.

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“…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.…”

Section: Raw Sediment Origin and Samplingmentioning

confidence: 99%

“…The need to keep up with the rising demand, particularly for developing countries, should be coupled with the necessity to better manage carbon dioxide emissions to reduce environmental impacts. Cement production is responsible for the emission of one ton of CO 2 for each ton of produced clinker [4][5][6]. It generates a global greenhouse gas emission amount of 5 to 8% of the entire CO 2 emissions [6,7].…”

Section: Introductionmentioning

confidence: 99%

“…Laoufi et al (2016) [2] confirmed the high pozzolanic character of thermally treated Fergoug dam sediments at various temperature levels (750 • C, 850 • C, and 950 • C). Benzerzour et al (2017 and [4,19] studied the mechanical properties of a mortar in which the cement was replaced by 750 • C calcined marine French sediments. They reported that the mechanical properties of the mortar were equal to or higher than those of the control mortar.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2021

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This study investigated the potential use of Zerdezas dam Calcined Sediments (CS) and El-Hadjar Blast Furnace Slag (GGBS) from northern Algeria as a partial replacement of cement (C) in normal hardening hydraulic road binders. Two binder mix designs were optimized using a Response Surface Methodology (RSM). The first mix, 50C35GGBS15CS, consisted of 50% cement, 35% blast furnace slag, and 15% calcined sediment. The second mix, 80C10GGBS10CS, consisted of 80% cement, 10% blast furnace slag, and 10% calcined sediments. The tests of workability, setting time, volume expansion, compressive and flexural strengths, porosity, and SEM were conducted to ensure that both mixes meet the standard requirements for road construction binders. The two proposed mixes were qualified as normal hardening hydraulic road binder. The reuse of the sediments will contribute to a better disposal of dam sediments and steel industry waste and to preserve natural resources that are used for manufacturing cement. It will also contribute to the environmental impact reduction of cement clinker production by reducing greenhouse gas emissions.

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Formulation of mortars based on thermally treated sediments

Cited by 25 publications

References 28 publications

Mechanical Properties and Microstructure of Low Carbon Binders Manufactured from Calcined Canal Sediments and Ground Granulated Blast Furnace Slag (GGBS)

Mechanical Properties and Microstructure of Low Carbon Binders Manufactured from Calcined Canal Sediments and Ground Granulated Blast Furnace Slag (GGBS)

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

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

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