Mechanical properties, radiation mitigation and fire resistance of OPC-recycled glass powder composites containing nanoparticles

Ramadan, M.; El-Gamal, S. M. A.; Selim, F.A.

doi:10.1016/j.conbuildmat.2020.118703

Cited by 70 publications

(23 citation statements)

References 79 publications

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“…The % mass loss of the first peak is 6.9 and 7.2, while for the second peak 2.1 and 2.8 after 7 and 28 days of hardening, respectively. These values affirmed the development of the hydration process of PC and the formation of extra quantities of CSHs, ettringite, and AFm (monosulphate), and CH as the main hydration products [27]. The presence of double peaks appearing at 720 and 760 ascertain the partial carbonation of the formed hydration products during the handling of the specimens.…”

Section: X-ray Diffraction (Xrd)supporting

confidence: 53%

“…The formation of additional hydration products and/or the formation of new products (CFSH and CuSH) is the main factor for the obtained dense and hard matrix for this nanocomposite Fig. 22a and b [27].…”

Section: Morphology and Textural Characteristicsmentioning

confidence: 90%

“…These products are stuck in the available spaces (macro and micropores) along the hardened composite, promoting the formation of the hardened matrix that has good resistance to fire deterioration [28]. Evidently, the noticed decrease in the CS values for all composites upon exposure to 600 °C is mainly ascribed to the thermal degradation of nearly all fundamental products such as CSH (I and II), CAH, CASHs, AFm, Aft, CFSH, and CH [27]. Finally, the enormous depletion in CS values for all tested composites after firing at 800 °C is assigned to the complete thermal degradation for all binding centers, as well as the induction of several cracks along with the composite matrix [18].…”

Section: Thermal Resistivity (Tr)mentioning

confidence: 94%

“…11a-d). These outcomes could be explained as follows: the high upgrading in the CS values after exposure to 300 °C could be credited to the hydrothermal reaction (internal autoclaving) that occurs between the H 2 O vapor molecules generated from the evaporation of physically adsorbed water inside different pores along with the hardened cement matrix and the residual unreacted cement grains [27]. The obvious enhancement in the thermal stability of different nanocomposites (especially Mix DCFs3) at 300 °C is assigned to the perfect dispersion of CFs NPs within the composite matrix and its effectiveness to induce the formation of large quantities of various hydration products via its nucleation effect and activation of the internal autoclaving.…”

Section: Thermal Resistivity (Tr)mentioning

confidence: 99%

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Utilization of alum sludge waste for production of eco-friendly blended cement

Mohamed

El-Gamal

Farghali

2022

J Mater Cycles Waste Manag

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This work was focused on evaluating the suitability of replacing Portland cement (PC) by 5, 10 and 15 mass % of activated alum sludge waste (AAS) as a pozzolanic material. Exploitation of low-cost nanocomposite for bolstering the physical, mechanical, and stability against firing of PC–AAS-hardened composites was inspected. CuFe2O4 spinel nanoparticle with average particle size (~ 50 nm) was prepared. Inclusion of CuFe2O4 spinel in different PC–AAS-hardened composites bolsters their physicomechanical features at almost normal curing ages as well as their stability against firing. The positive impact of synthesized CuFe2O4 spinel was affirmed via TGA/DTG and XRD techniques, which indicated the presence of diverse hydration yields such as CSHs, CASHs, CFSH, and CuSH that enhance the overall physicomechanical characteristics and thermal stability of various PC–AAS-hardened composites. The composite containing (90 PC–10 AAS waste–2 CuFe2O4) offers many benefits from the economic and environmental view. Graphical abstract

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Section: X-ray Diffraction (Xrd)supporting

confidence: 53%

Section: Morphology and Textural Characteristicsmentioning

confidence: 90%

Section: Thermal Resistivity (Tr)mentioning

confidence: 94%

Section: Thermal Resistivity (Tr)mentioning

confidence: 99%

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Utilization of alum sludge waste for production of eco-friendly blended cement

Mohamed

El-Gamal

Farghali

2022

J Mater Cycles Waste Manag

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“…The marble residue showed irregular particles of angular shape, probably due to the cutting/sawing process of (8) To confirm the reliability of the data, the obtained temperature ranges are also compared with those reported in the literature [40][41][42][43][44][45][46] in Table 5.…”

Section: (6)mentioning

confidence: 80%

Partial replacement of cement with granular marble residue: effects on the properties of cement pastes and reduction of CO2 emission

Gonçalves

Andrade

2020

SN Appl. Sci.

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The effects of CP V Portland cement replacement with granular marble residues were investigated. The physical-chemical properties of the starting materials and of the pastes were characterized by XRD, XRF, TG/DTA, SEM and granulometric analyses. Axial compressive strength, apparent density, capillary and total capacity of water absorption of the hardened pastes with 0, 10, 20 and 30% replacements, aged for 28 days, were characterized. The results indicated that the partial replacement by the marble residue did not affect the cement hydration but provided packaging improvements and some filler action. The reduction of CO 2 emission was estimated as 0.28 million tons per year due to replacement of 10% CP V Portland cement with the marble residue. The results indicated that this is an alternative means to reduce the CO 2 emissions in the cement industry and to reuse marble residues that otherwise could be inadequately disposed.

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