Thermal resistance, microstructure and mechanical properties of type I Portland cement pastes containing low-cost nanoparticles

El-Gamal, S. M. A.; Abo-El-Enein, S.A.; El-Hosiny, F. I.; Amin, M.S.; Ramadan, M.

doi:10.1007/s10973-017-6629-1

Cited by 83 publications

(31 citation statements)

References 62 publications

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“…The effect of NS on the compressive strength of cement pastes exposed to elevated temperatures has been reported in several works [ 40 , 41 , 42 , 52 ]. Heikal et al [ 52 ] analyzed the effects of 1–6 wt.…”

Section: The Effect Of Nanosilica On the Thermal Resistance Of Cemmentioning

confidence: 99%

“…The study showed that plain OPC samples broke down completely and lost their strength, while samples containing NS retained almost 80% of their initial strength. El-Gamal et al [ 41 ] have evaluated the effects of 0.5–3 wt. % NS admixture on the properties of OPC cement pastes, exposed to temperatures of 300, 600, and 800 °C ( Figure 4 ).…”

Section: The Effect Of Nanosilica On the Thermal Resistance Of Cemmentioning

confidence: 99%

“…Due to its pozzolanic activity and high surface area, alumina particles can react with CH, forming additional hydration products such as C–A–S–H and C–A–H gel. This phenomenon is reflected in a noticeable improvement in microstructure and the mechanical characteristics of cementitious composites [ 41 ]. Accordingly, NA has been introduced as an admixture for improving the thermal resistance of cementitious composites; the studies related to this topic have been summarized in Table 3 .…”

Section: The Effect Of Nanoalumina On the Thermal Resistance Of Cementioning

confidence: 99%

“…El-Gamal et al [ 41 ] have evaluated the effects of 0.5, 1, 2 and 3 wt. %, NA admixture on the properties of OPC cement pastes, exposed to temperatures of 300, 600 and 800 °C.…”

Section: The Effect Of Nanoalumina On the Thermal Resistance Of Cementioning

confidence: 99%

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The Influence of Nanomaterials on the Thermal Resistance of Cement-Based Composites—A Review

2018

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Exposure to elevated temperatures has detrimental effects on the properties of cementitious composites, leading to irreversible changes, up to total failure. Various methods have been used to suppress the deterioration of concrete under elevated temperature conditions. Recently, nanomaterials have been introduced as admixtures, which decrease the thermal degradation of cement-based composites after exposure to high temperatures. This paper presents a comprehensive review of recent developments related to the effects of nanoparticles on the thermal resistance of cementitious composites. The review provides an updated report on the effects of temperature on the properties of cement-based composites, as well as a detailed analysis of the available literature regarding the inclusion of nanomaterials and their effects on the thermal degradation of cementitious composites. The data from the studies reviewed indicate that the inclusion of nanoparticles in composites protects from strength loss, as well as contributing to a decrease in disruptive cracking, after thermal exposure. From all the nanomaterials presented, nanosilica has been studied the most extensively. However, there are other nanomaterials, such as carbon nanotubes, graphene oxide, nanoclays, nanoalumina or nano-iron oxides, that can be used to produce heat-resistant cementitious composites. Based on the data available, it can be concluded that the effects of nanomaterials have not been fully explored and that further investigations are required, so as to successfully utilize them in the production of heat-resistant cementitious composites.

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Section: The Effect Of Nanosilica On the Thermal Resistance Of Cemmentioning

confidence: 99%

Section: The Effect Of Nanosilica On the Thermal Resistance Of Cemmentioning

confidence: 99%

Section: The Effect Of Nanoalumina On the Thermal Resistance Of Cementioning

confidence: 99%

“…El-Gamal et al [ 41 ] have evaluated the effects of 0.5, 1, 2 and 3 wt. %, NA admixture on the properties of OPC cement pastes, exposed to temperatures of 300, 600 and 800 °C.…”

Section: The Effect Of Nanoalumina On the Thermal Resistance Of Cementioning

confidence: 99%

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The Influence of Nanomaterials on the Thermal Resistance of Cement-Based Composites—A Review

2018

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“…However, their use is hindered by the slow hydration rates of ordinary belites [1,[16][17][18]. A contribution on rapid hardening behavior of b-C 2 S by accelerated carbonation curing appeared recently [19] among the other valuable reports relating to the use of thermal methods in the studies of cement hydration and the role of several factors in this process [20,21]. For this reason, the comparative studies of different belite materials activity are needed.…”

Section: Introductionmentioning

confidence: 99%

Characterization of 40-year-old calcium silicate pastes by thermal methods and other techniques

Murzyn

Malata

Wiśniewska

et al. 2019

J Therm Anal Calorim

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Differential thermal analysis, thermogravimetry and evolved gas analysis, as well as the X-ray diffraction, were used to identify and to quantify the products of dicalcium silicate hydration. The samples were 38 years stored in laboratory conditions. The calcium hydroxide, calcium carbonate and calcium silicate hydrate contents were determined and discussed in terms of the specific properties of initial anhydrous phases used.

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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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Thermal resistance, microstructure and mechanical properties of type I Portland cement pastes containing low-cost nanoparticles

Cited by 83 publications

References 62 publications

The Influence of Nanomaterials on the Thermal Resistance of Cement-Based Composites—A Review

The Influence of Nanomaterials on the Thermal Resistance of Cement-Based Composites—A Review

Characterization of 40-year-old calcium silicate pastes by thermal methods and other techniques

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

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