A preliminary investigation of a novel mortar based on alkali-activated seashell waste powder

Hasnaoui, Abdelaziz; Bourguiba, Amel; Mendili, Yassine El; Sebaïbi, Nassim; Boutouil, Mohamed

doi:10.1016/j.powtec.2021.05.069

Cited by 30 publications

(11 citation statements)

References 41 publications

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“…This is in accordance with the calcite phase found in XRD. However, for SF, the behaviour was somewhat different, as can be observed in the inset of Figure 5 SF showed a characteristic TGA profile observed in other kinds of shells [ 4 , 8 , 54 ]. Several stages were observed: (i) from room temperature, up to 105 °C humidity was lost; (ii) from 105 to 300 °C, the organic matrix was lost (cellular structure of the mollusc) [ 55 ]; (iii) from 300 to 600 °C, the weight loss was practically non-existent, although in DTA a peak appeared at approximately 500 °C.…”

Section: Resultsmentioning

confidence: 83%

The Effect of Acanthocardia tuberculata Shell Powder as Filler on the Performance of Self-Compacting Mortar

et al. 2023

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In this research, the feasibility of using Acanthocardia tuberculata shell waste from the canning industry in the manufacturing of self-compacting mortar (SCM) was tested. The seashells were finely ground to be used as filler instead of the limestone filler normally used in this type of SCM. First, a physicochemical and microstructural characterisation of all raw materials was carried out, including the particle size distribution of both fillers. Subsequently, the self-compactability properties in the fresh state of SCM were evaluated using a total substitution by volume of limestone filler for seashell powder, using different self-compactiblity parameters. The mineralogical phases of all the SCM tested were identified once hardened by means of X-ray diffraction technique, thermogravimetric and differential thermal analysis. In addition, the mechanical properties, water absorption capacity, dry bulk density and accessible porosity of water of hardened mortars at 28 days of curing were analysed. The effect of replacing limestone filler by Acanthocardia tuberculata filler resulted in a decrease in compressive strength of 29.43, 16.84 and 2.29%, respectively. The results indicate that it is possible to completely replace natural limestone filler with Acanthocardia tuberculata shell filler without significantly affecting the mechanical properties of SCM.

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Section: Resultsmentioning

confidence: 83%

The Effect of Acanthocardia tuberculata Shell Powder as Filler on the Performance of Self-Compacting Mortar

et al. 2023

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“…Limestone the primary raw material in Portland cement production, has the same chemical composition as a seashell: calcium carbonate (CaCO 3 ). This certifies the possibility of a seashell as a cementitious material [ 3 ]. Seashells are the remains of mollusc, and it generates a large amount of waste [ 17 ].…”

Section: Introductionmentioning

confidence: 64%

“…Population and economic growth have led to a speedy increase in construction activities, resulting in high demand for Portland cement due to its extensive use as a binding material [ 1 , 2 ]. The high demand for cement is due to its primary use in concrete and mortars which are keystones in infrastructure and second only to water [ 3 ]. Cement production leads to the emission of CO 2 gas which has a negative environmental impact thus polluting the atmosphere, and increasing respiratory diseases among others [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

“…Some precursors result in calcium alumina silicate hydrate (C–A–S–H) gel, while some as sodium alumina silicate hydrate (N–A–S–H) gel due to their chemical composition. An example of raw material rich in calcium is slag which results in calcium alumina silicate hydrate (C–A–S–H) gel which possesses a tobermorite-like structure when activated due to the chemical composition system, while sodium alumina silicate hydrate (N–A–S–H) gel has low calcium content but high sodium content which possess a disordered pseudo zeolitic structure which is highly crossed linked [ 3 ]. These precursors are deployed in the formation of geopolymer which can be utilized as a binder and a concrete termed geopolymer binder and geopolymer concrete, respectively when activated with an alkali which serves as an activator.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical and durability assessments of steel slag-seashell powder-based geopolymer concrete

Okoro¹,

Oyebisi²

2023

Heliyon

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“…It greatly limits the application prospects of OSP. Abdelaziz et al [ 20 ] conducted alkali-activation treatment on OSP and prepared a new type of alkali-activated shell waste (AASW) mortar with a compressive strength of 22 MPa and a porosity of 16.5%. Hassan et al [ 21 ] evaluated the effect of OSPs on chloride penetration of cement materials.…”

Section: Introductionmentioning

confidence: 99%

Sustainable Use of Waste Oyster Shell Powders in a Ternary Supplementary Cementitious Material System for Green Concrete

et al. 2022

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The increasing concern for decarbonization and sustainability in construction materials is calling for green binders to partially replace cement since its production is responsible for approximately 8% of global anthropogenic greenhouse gas emissions. Supplementary cementitious materials (SCMs), including fly ash, slag, silica fume, etc., can be used as a partial replacement for ordinary Portland cement (OPC) owing to reduced carbon dioxide emissions associated with OPC production. This study aims to investigate the sustainable use of waste oyster shell powder (OSP)-lithium slag (LS)-ground granulated blast furnace slag (GGBFS) ternary SCM system in green concrete. The effect of ternary SCMs to OPC ratio (0%, 10%, 20%, and 30%) on compressive strength and permeability of the green concrete were studied. The reaction products of the concrete containing OSP-LS-GGBFS SCM system were characterized by SEM and thermogravimetric analyses. The results obtained from this study revealed that the compressive strength of concrete mixed with ternary SCMs are improved compared with the reference specimens. The OSP-LS-GGBFS ternary SCMs-based mortars exhibited a lower porosity and permeability compared to the control specimens. However, when the substitution rate was 30%, the two parameters showed a decline. In addition, the samples incorporating ternary SCMs had a more refined pore structure and lower permeability than that of specimens adding OSP alone. This work expands the possibility of valorization of OSP for sustainable construction materials.

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A preliminary investigation of a novel mortar based on alkali-activated seashell waste powder

Cited by 30 publications

References 41 publications

The Effect of Acanthocardia tuberculata Shell Powder as Filler on the Performance of Self-Compacting Mortar

The Effect of Acanthocardia tuberculata Shell Powder as Filler on the Performance of Self-Compacting Mortar

Mechanical and durability assessments of steel slag-seashell powder-based geopolymer concrete

Sustainable Use of Waste Oyster Shell Powders in a Ternary Supplementary Cementitious Material System for Green Concrete

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