Effect of Using Kaolin and Ground-Granulated Blast-Furnace Slag on Green Concrete Properties

Sharobim, Kamal; Mohamadien, Hassan A.; Omar, Omar; Geriesh, Mostafa M.

doi:10.1007/978-3-319-78175-4_60

Cited by 3 publications

(4 citation statements)

References 6 publications

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“…The flexural strength values for mixes M h 30@1 and M h 30@2 were lower than those of mixes M30@1 and M30@2 by 39% and 46%, respectively. This is in the line with the findings 462 of Sharobim et al (2018) who reported an almost similar reduction for the group of specimens tested after being exposed to 70°C compared with the other group which was tested at 25°C. 464…”

Section: Effect Of Heating On Flexural Strengthsupporting

confidence: 92%

“…For Mix Mh10@2, which included 2% steel fibres had a tensile strength value lower than that of mix M10@2, by 25%. This shows that the reduction of tensile strength for overheated specimens in this study were lower than that observed by Sharobim et al, (2018) who studied specimens containing crumb rubber only heated up to 300°C. However, one of the group 389 specimens studied by them and exposed to 70°C showed an almost similar reduction (24.4%).…”

Section: Effect Of Heating On Tensile Strengthcontrasting

confidence: 70%

“…The Poisson effect took place inversely by reducing the size of the particles that were exposed to the tensile forces which, in turn, reduces the strength. In higher temperatures, this inelastic property degraded leading to rapid and more reduction in the flexural strength as observed by Sharobim et al (2018) for specimens tested after being exposed to 400°C.…”

Section: Effect Of Heating On Flexural Strengthmentioning

confidence: 85%

“…The work reported that the addition of steel fibres from 0.75% led to improved tensile strength of overheated rubberized concrete having 10% crumb rubber compared to normal concrete. Sharobim et al, (2018) reported a higher reduction of tensile strength for specimens overheated in the oven at 300°C. They found a 30% reduction in the splitting tensile strength of overheated rubberized concrete having 10% crumb rubber compared to that of normal concrete.…”

Section: Introduction 79mentioning

confidence: 96%

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Mechanical Properties and Air Permeability of Concrete Containing Waste Tires Extracts

Shaaban

Rizzuto

El-Nemr

et al. 2021

J. Mater. Civ. Eng.

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The safe disposal of waste tyres has been seen as having a negative impact on the environment. To mitigate this impact, the components of waste tyres can be used in the production of green concrete. This study explores the effects of the curing and drying regime on the mechanical properties and permeation characteristics of concrete containing both crumbed rubber and steel fibres that are removed from waste tyres. Five concrete mixes were designed and concrete cubes, cylinders, and prisms were cast using waste tyres extracts. Crumb rubber was treated by submersion in sodium hydroxide and then used to partially replace 10% and 30% of fine aggregates in the concrete mix. Extracted steel fibres were added at the rate of 1% and 2% per volume of each mix. Compressive, indirect splitting tensile as well as flexural strengths were conducted after normal curing while observing several drying conditions. Additionally, air permeability was assessed using a portable apparatus which was developed to assess permeability easily. For the concrete test specimens containing 10% partial replacement of fine aggregate by crumb rubber and 1% steel fibres, it was discovered that the splitting tensile strength and flexural strength were higher than that of the control mix by 21% and 22.6%, respectively. For specimens, that included the 10% crumb rubber and 1% steel fibres, when exposed to oven drying at 105°C for 12 hours, the compressive strength results increased by 17% compared to the control specimens exposed to the same conditions. Unlike the compressive strength results, the splitting tensile and flexural strength results decreased after exposing the specimens to elevated temperature. The addition of crumb rubber and steel fibres as a partial fine aggregate replacement resulted in increasing the air permeability of the concrete to different degrees depending on the percentages used. The oven drying curing regime improved the permeability by reducing it in specimens containing the 10% crumb rubber and 1% steel fibres as indicated by increasing their permeability time index by 15% when compared to air-dried specimens. Using waste tyre extracts as a partial replacement of concrete fine aggregate can be recommended for both indoor and outdoor applications. This study showed that this was a viable, economic and environmentally friendly method for reducing carbon footprint.

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Section: Effect Of Heating On Flexural Strengthsupporting

confidence: 92%

Section: Effect Of Heating On Tensile Strengthcontrasting

confidence: 70%

Section: Effect Of Heating On Flexural Strengthmentioning

confidence: 85%

Section: Introduction 79mentioning

confidence: 96%

See 2 more Smart Citations

Mechanical Properties and Air Permeability of Concrete Containing Waste Tires Extracts

Shaaban

Rizzuto

El-Nemr

et al. 2021

J. Mater. Civ. Eng.

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Wood sawdust waste-derived nano-cellulose as a versatile reinforcing agent for nano silica cement composites: a systematic study on its characterization and performance

Badawy

El-Feky

El-Tair

et al. 2023

Sci Rep

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The development of sustainable construction materials is a pressing concern for researchers worldwide, as the cement industry is a major contributor to environmental degradation. The incorporation of nano-materials with cement composites has emerged as a promising solution to sustainable materials production. In this study, the effect of the addition of nano cellulose produced from wood sawdust waste on the performance of cement-based nano-silica composite was investigated. The nano-materials were incorporated at low concentrations and in gel form to eliminate the need for any advanced dispersion techniques. The results indicated that the addition of even low concentrations of nano cellulose significantly enhanced the compactness and mechanical properties of the cement matrix. The crack propagation was observed to be arrested with better adherence to the cement hydration product, which resulted from the presence of nano-silica. The nano cellulose fibers were found to bridge the calcium silicate hydrate products, arresting the propagation of cracks at their initial condition. The high pozzolanic reactivity of nano-silica ensured a minimal amount of calcium hydroxide, which is a significant contributor to the carbon footprint of cement production. Overall, the findings of this study suggest that the incorporation of nano cellulose from wood sawdust waste with cement-based nano-silica composite can lead to the development of sustainable and high-performance building materials with improved mechanical properties and reduced environmental impact.

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Utilizing industrial byproducts for the manufacture of clay-cellulose nanocomposite cements with enhanced sustainability

El-Feky,

Badawy,

Youssef

et al. 2024

Sci Rep

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This study investigates the influence of different nano clay contents (0, 1, 3, and 5 wt% of cement) on the microstructure and the mechanical properties of cement composites reinforced with varying Nano cellulose fiber contents (0, 0.5, 0.75, and 1 wt% of cement). Unlike previous research that employed sonication to improve dispersion in the cement matrix, this study explores the effects of unsonicated nano-cellulose addition and the combined incorporation of nano-cellulose and nano-clay. The results demonstrate that these additions significantly enhance the compressive strength, abrasion resistance, and water absorption ratios of the cement composites. Furthermore, the inclusion of nano-clay improves the microstructure of the cement matrix, strengthening the interfacial transition zone and reinforcing the bond between nano-cellulose and the cement matrix. The microstructural analysis using scanning electron microscopy (SEM) reveals the presence of a dense interconnected structure characterized by rod-like crystals. This research contributes to the development of sustainable construction materials by examining the effects of nano-cellulose and nano-clay on the properties and microstructure of cement composites. The utilization of industrial byproducts, such as wood sawdust, for the extraction of nano-cellulose offers an eco-friendly approach to enhance the performance of cement-based materials. The maximum compressive strength obtained, after 28 days, was at mix with 0.75% NCL + 5%NC with a gain of 53.5% than that of the control mix. In mixes containing only nano-clay (NCL), the increase in NCL content led to a higher rate of water absorption in the cement matrix, which reaches 4%. Confirming the results obtained from compressive strength and water absorption, mix with 0.75% NCL and 5% NC had obtained the optimum values with an improvement of 20% than that of the control mix.

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Effect of Using Kaolin and Ground-Granulated Blast-Furnace Slag on Green Concrete Properties

Cited by 3 publications

References 6 publications

Mechanical Properties and Air Permeability of Concrete Containing Waste Tires Extracts

Mechanical Properties and Air Permeability of Concrete Containing Waste Tires Extracts

Wood sawdust waste-derived nano-cellulose as a versatile reinforcing agent for nano silica cement composites: a systematic study on its characterization and performance

Utilizing industrial byproducts for the manufacture of clay-cellulose nanocomposite cements with enhanced sustainability

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