Efficiency of natural pozzolan and natural perlite in controlling the alkali-silica reaction of cementitious materials

Chihaoui, R.; Siad, Hocine; Senhadji, Y.; Mohamed, Mazlan; Nefoussi, Abdelhamid Mejdoub; Lachemi, Mohamed

doi:10.1016/j.cscm.2022.e01246

Cited by 15 publications

(18 citation statements)

References 36 publications

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“…Ultrasonic pulse testing (UPV) can be used to evaluate the structural development, internal cracks, and microstructures of cement-based materials [ 37 ]. The UPV test results for fly ash fine aggregate mortar with different substitution rates are presented in Figure 8 .…”

Section: Resultsmentioning

confidence: 99%

Effect of Replacing Fine Aggregate with Fly Ash on the Performance of Mortar

Zhang

Yang

2023

Materials

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Natural river sand resources are facing depletion, and large-scale mining pollutes the environment and harms humans. To utilize fly ash fully, this study used low-grade fly ash as a substitute for natural river sand in mortar. This has great potential to alleviate the shortage of natural river sand resources, reduce pollution, and improve the utilization of solid waste resources. Six types of green mortars were prepared by replacing different amounts of river sand (0, 20, 40, 60, 80, and 100%) with fly ash and other volumes. Their compressive strength, flexural strength, ultrasonic wave velocity, drying shrinkage, and high-temperature resistance were also investigated. Research has shown that fly ash can be used as a fine aggregate in the preparation of building mortar, thereby ensuring that green-building mortar has sufficient mechanical properties and better durability. The replacement rate for optimal strength and high-temperature performance was determined to be 80%.

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Section: Resultsmentioning

confidence: 99%

Effect of Replacing Fine Aggregate with Fly Ash on the Performance of Mortar

Zhang

Yang

2023

Materials

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“…Cependant, l'ajout de matériaux pouzzolaniques entraîne généralement une diminution des résistances à la compression. Ces résultats concordent avec les recherches antérieures menées par (Chihaoui et al, 2022), (Chaib et al, 2018), et (Erdem et al, 2007).…”

Section: éTat Durciunclassified

L'effet de l'incorporation des sédiments calcinés et de la perlite comme remplacement partiel du ciment sur le comportement des mortiers

Achour,

Belas,

Sadok

2024

J. Eng. Exact Sci.

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L'accumulation de sédiments dans de nombreux barrages construits en Algérie pose un problème préoccupant qui nécessite une attention et une action immédiate de la part des autorités et des gestionnaires de l'Agence Nationale des Barrages et des Transferts (ANBT). De plus, diverses recherches sur les sédiments ont révélé que le fait de les soumettre à un traitement thermique (calcination) permet de les utiliser dans la production de matériaux cimentaires comme substitut partiel au ciment. Additionnés à la perlite, une pouzzolane naturelle, de nombreux avantages peuvent être obtenus, notamment une consommation de ciment réduite, une génération de chaleur minimisée, une maniabilité améliorée, une perméabilité réduite et une résistance accrue. Dans cette étude, l'objectif est d'explorer le potentiel d'utilisation des Les sédiments extraits du barrage Chorfa II ainsi que la perlite provenant de Hammam Boughrara (tous deux situés dans l’ouest algérien) dans le mortier, comme substituts partiels au ciment. Une analyse des sédiments calcinés et de la perlite a révélé la faisabilité d'un remplacement partiel du ciment. Les recherches se sont principalement concentrées sur l'évaluation des propriétés des mortiers à l’état frais et durci.

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“…It is observed that C-S-H gel is formed around GP particles because of the pozzolanic reaction [96]. In the following step, EDS (which is coupled with an SEM image) evaluates the quality and quantity of pozzolanic reactivity by determining the Ca/Si ratio of C-S-H gel produced through pozzolanic reaction based on the mean atomic weight [101,[107][108][109]. Figure 11 shows an example of an SEM image along with the EDS analysis of a hydrated cement sample that was partially replaced with a natural pozzolan at 20% (MZ20).…”

Section: Scanning Electron Microscopy-energy Dispersive X-ray Spectro...mentioning

confidence: 99%

Comprehensive Review of Direct and Indirect Pozzolanic Reactivity Testing Methods

Elyasigorji,

Farajiani,

Hajipour Manjili

et al. 2023

Buildings

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The production of portland cement is among the major contributors to greenhouse gas emissions that adversely affect the environment. Identifying sustainable materials to partially replace portland cement in concrete, such as pozzolanic materials, is crucial in addressing this issue. These materials mainly consist of silica and alumina that react with the available calcium hydroxide to form strength-bearing phases such as calcium silicate hydrates. Understanding the degree of pozzolanic reactivity of materials using efficient reactivity test methods is an important consideration. The paper thoroughly reviews the available literature related to direct and indirect pozzolanic reactivity test methods that have been utilized over the years. Direct methods quantify the amount of consumed calcium hydroxide, whereas indirect methods assess changes in the physical properties of the specimen due to pozzolanic reactions. The aim of this paper is to identify affordable, time-saving, and effective direct and indirect methods. Based on this study, the Frattini, electrical conductivity, and pH tests are considered the most time-efficient methods to assess pozzolanic materials. Electrical conductivity and pH tests are also easy to perform. In contrast, other methods are more time-consuming.

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Efficiency of natural pozzolan and natural perlite in controlling the alkali-silica reaction of cementitious materials

Cited by 15 publications

References 36 publications

Effect of Replacing Fine Aggregate with Fly Ash on the Performance of Mortar

Effect of Replacing Fine Aggregate with Fly Ash on the Performance of Mortar

L'effet de l'incorporation des sédiments calcinés et de la perlite comme remplacement partiel du ciment sur le comportement des mortiers

Comprehensive Review of Direct and Indirect Pozzolanic Reactivity Testing Methods

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