Utilization of some industrial wastes for eco-friendly cement production

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

doi:10.1016/j.susmat.2017.03.001

Cited by 42 publications

(22 citation statements)

References 28 publications

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“…FA is in the form of spherical particles composed of many phases-amorphous and also crystalline compounds, mostly silicon, calcium, aluminium and iron oxides. The versatility of fly ash for production of different types of cements is attributed to its physical features, chemical properties and phase composition [77][78][79].…”

Section: Fly Ash (Fa)mentioning

confidence: 99%

End-of-Life Materials Used as Supplementary Cementitious Materials in the Concrete Industry

et al. 2020

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A sustainable solution for the global construction industry can be partial substitution of Ordinary Portland Cement (OPC) by use of supplementary cementitious materials (SCMs) sourced from industrial end-of-life (EOL) products that contain calcareous, siliceous and aluminous materials. Candidate EOL materials include fly ash (FA), silica fume (SF), natural pozzolanic materials like sugarcane bagasse ash (SBA), palm oil fuel ash (POFA), rice husk ash (RHA), mine tailings, marble dust, construction and demolition debris (CDD). Studies have revealed these materials to be cementitious and/or pozzolanic in nature. Their use as SCMs would decrease the amount of cement used in the production of concrete, decreasing carbon emissions associated with cement production. In addition to cement substitution, EOL products as SCMs have also served as coarse and also fine aggregates in the production of eco-friendly concretes.

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Section: Fly Ash (Fa)mentioning

confidence: 99%

End-of-Life Materials Used as Supplementary Cementitious Materials in the Concrete Industry

et al. 2020

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“…Consequently, the influence of cement production on the environment creates a great challenge for both academic researchers and construction industries in the present time. Therefore, it is critical to find alternative cementitious materials with eco‐friendly properties to substitute OPC, which is environmentally stressful 8–12 . For these reasons, geopolymer concrete is a suitable composite material possessing all the essential properties to be an alternative to conventional cement, using a novel, low‐cost, eco‐friendly materials 13,14 .…”

Section: Introductionmentioning

confidence: 99%

Structural performance of ambient‐cured reinforced geopolymer concrete beams with steel fibres

Hassan

Arif

Shariq

2020

Structural Concrete

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In the present investigation, the structural behavior of reinforced geopolymer concrete (RGPC) beams containing steel fiber has been studied. Four‐point flexural loading condition was applied in this experimental study; for testing the RGPC beams. The deflections of the RGPC were gauged at the mid‐span of the specimens. The crack patterns and failure mode of RGPC beam specimens were measured during the testing process. From these measurements, it has been observed that the steel fibers control cracking due to plastic and drying shrinkages. The length and width of cracks generally improved with the increment of steel fiber content. The findings also indicate that the flexural strength and elastic modulus of RGPC are remarkably enhanced due to the incorporation of steel fibers. Furthermore, the failure mode of RGPC is almost similar to the failure mode of conventional concrete. However, the RGPC performed better than the conventional concrete in terms of flexural strength and other mechanical properties. It has also been noticed that the increase of a/d ratio results in shifting the flexural failure mode in the mid‐span regions towards the support points. The experimental results have been compared with the relevant published literature as well as with the different standard codes.

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“…It is noted in several studies that about 7% of the world's CO 2 emissions originate from cement production 6–9 . Over the next few years, it is estimated that 17% of total CO 2 emissions will come from cement production 10,11 . Since cement production is carried out at high temperatures (1400–1,500°C), it requires a significant amount of energy.…”

Section: Introductionmentioning

confidence: 99%

“…Geopolymers proposed as alternative to cement reduce CO 2 emissions from cement production by 80% 8,26 . It is expressed in various studies that geopolymer production provides 60% energy savings compared to Portland cement production 10,27,28 . Furthermore, because the hydration of geopolymer binders does not form products such as C 3 A and Ca(OH) 2 , the durability properties of geopolymer concretes are expected to be better than those produced by conventional cement 2 …”

Section: Introductionmentioning

confidence: 99%

Influence of various factors on properties of geopolymer paste: A comparative study

Kantarcı

Türkmen

Ekinci

2020

Structural Concrete

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A comprehensive experimental study was conducted to investigate effect of different production parameters such as activator type, activator concentration and curing temperature on fresh and hardened properties of volcanic tuff based geopolymer paste (GP) samples. Volcanic tuff obtained from Nevşehir (Central Anatolia, Turkey) was ground to particle size less than 45 μm, after that alkali activation process was provided with two type of alkali activators such as NaOH and NaOH+Na2SiO3 (SH and SH + SS) solutions. Produced geopolymer samples were cured at different temperatures ranging from 23 to 150°C. Compressive strength, setting time, hydration heat of GP samples were investigated. Additionally, microstructural investigations were performed with SEM and XRD analyzes. As a result of modification of experimental parameters, compressive strength development reached to 41.43 MPa was obtained from GP samples, which did not harden in laboratory conditions. It was also determined that the alkali activation of volcanic tuff with SH exhibited better mechanical and microstructural properties than alkali activation with SH + SS.

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Utilization of some industrial wastes for eco-friendly cement production

Cited by 42 publications

References 28 publications

End-of-Life Materials Used as Supplementary Cementitious Materials in the Concrete Industry

End-of-Life Materials Used as Supplementary Cementitious Materials in the Concrete Industry

Structural performance of ambient‐cured reinforced geopolymer concrete beams with steel fibres

Influence of various factors on properties of geopolymer paste: A comparative study

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