Influence of saturated activated carbon on the rheological and mechanical properties of cementitious materials

Lekkam, Massinissa; Benmounah, Abdelbaki; Kadri, El-Hadj; Soualhi, Hamza; Kaci, Abdelhak

doi:10.1016/j.conbuildmat.2018.11.257

Cited by 16 publications

(10 citation statements)

References 42 publications

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“…As shown in EDS and the study by Lekkam et al. (2019), it turns out that carbon is the most critical component with the presence of some elements such as Si, Ca, and K.…”

Section: Resultsmentioning

confidence: 86%

Evaluation of the incorporation of charcoal residues in cement mortars

Reis

Serra

Zampieron

2021

Environmental Quality Mgmt

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Incorporating agroindustrial waste into cementitious composites can minimize natural resource consumption and decrease the construction industry's environmental impact. This paper aims to evaluate the potential of using charcoal residues (CR) to partially replace fine sand (by volume) on cementitious mortars’ properties. The microstructure and corresponding physicochemical compositions were determined with scanning electron microscopy (SEM), fluorescence, and X‐ray diffraction without prior processing. Test specimens were produced with CR in the contents of 0%, 10%, 20%, and 30% concerning fine sand. After the test specimens curing period, the axial compression strength, tensile strength by diametrical compression, and the SEM were combined with X‐ray dispersion spectrometry. The results showed that although the CR does not present themselves as pozzolanic materials, their incorporation around 20% showed mechanical resistance of 28 MPa, which is confirmed by the analysis of variance. Such results corroborate with research that confirms the feasibility of including these residues in cementitious matrices, adding value to the material.

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“…As shown in EDS and the study by Lekkam et al. (2019), it turns out that carbon is the most critical component with the presence of some elements such as Si, Ca, and K.…”

Section: Resultsmentioning

confidence: 86%

Evaluation of the incorporation of charcoal residues in cement mortars

Reis

Serra

Zampieron

2021

Environmental Quality Mgmt

View full text Add to dashboard Cite

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“…The mass production of hydration products resulted in large changes in the rheology and fluidity of the paste. (6) The application of SF as a new type of mineral admixture in the field of grouting was promising and meaningful. The substitution of SF can reduce the amount of cement while meeting the properties required for grouting, which can save economic costs and protect the environment.…”

Section: Discussionmentioning

confidence: 99%

“…The stability characterizes its ability to maintain its original properties, and the bleeding rate is usually used to characterize the stability of the paste [ 4 ]. The fluidity and rheology of the paste directly influence the effect of grouting or infiltration, which in turn affects the construction quality of metamorphic concrete [ 5 , 6 ]. The time-varying characteristics can significantly affect the diffusion effect of paste [ 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

Study on the Influence of Silica Fume (SF) on the Rheology, Fluidity, Stability, Time-Varying Characteristics, and Mechanism of Cement Paste

et al. 2021

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In this study, the rheology, fluidity, stability, and time-varying properties of cement paste with different substitute contents of silica fume (SF) were investigated. The result showed that the effects of SF on macro-fluidity and micro-rheological properties were different under different water–cement ratios. The addition of SF increased the yield stress and plastic viscosity in the range of 2.61–18.44% and 6.66–24.66%, respectively, and reduced the flow expansion in the range of 4.15–18.91%. The effect of SF on cement paste gradually lost its regularity as the w/c ratio increased. The SF can effectively improve the stability of cement paste, and the reduction range of bleeding rate was 0.25–4.3% under different water–cement ratios. The mathematical models of rheological parameters, flow expansion, and time followed the following equations: τ(t) = τ0 + k0t, η(t) = η0eat, and L(t) = L0 − k1t, L(t) = L0 − k1t − a1t2. The SF slowly increased the rheological parameters in the initial time period and reduced the degree of fluidity attenuation, but the effect was significantly enhanced after entering the accelerated hydration period. The mechanism of the above results was that SF mainly affected the fluidity and rheology of the paste through the effect of water film thickness. The small density of SF particles resulted in a low sedimentation rate in the initial suspended paste, which effectively alleviated the internal particle agglomeration effect and enhanced stability. The SF had a dilution effect and nucleation effect during hydration acceleration, and the increase of hydration products effectively increased the plastic viscosity.

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“…Addition of activated carbon increased the compressive and tensile strength of mortar. Specimen tested porosity and critical pore diameter values were observed to reduced by the addition of granular activated carbon at ≤1% by mass [16].…”

Section: Nj Krou Et Al[2015]mentioning

confidence: 97%

Prospective Benefits of Using Activated Carbon in Cement Composites- An Overview

Aiswarya¹,

Moses²,

Thomas³

et al. 2019

IJARET

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An exhaustive study of available literature on use of activated carbon in cement composites was done. Adsorptive nature of activated carbon can be effectively used to remove toxic air pollutants such as nitrogen oxide, volatile organic compounds by adsorbing to concrete elements (chimneys, tunnels etc.). Experimental research work carried out on cement composites containing activated carbon revealed its potential ability to improve physical, mechanical and durability properties of cement composites. A comprehensive review of selected literature was carried out and the significant findings are presented in this paper. Researchers across the globe had experimentally showed that presence of activated carbon at 1 to 4% in cement composites positively influence various properties of cement composites.

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Influence of saturated activated carbon on the rheological and mechanical properties of cementitious materials

Cited by 16 publications

References 42 publications

Evaluation of the incorporation of charcoal residues in cement mortars

Evaluation of the incorporation of charcoal residues in cement mortars

Study on the Influence of Silica Fume (SF) on the Rheology, Fluidity, Stability, Time-Varying Characteristics, and Mechanism of Cement Paste

Prospective Benefits of Using Activated Carbon in Cement Composites- An Overview

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