Utilization of cold bonded fly ash lightweight fine aggregates as a partial substitution of natural fine aggregate in self-compacting mortars

Güneyisi, Erhan; Gesoğlu, Mehmet; Altan, İnan; Öz, Hatice Öznur

doi:10.1016/j.conbuildmat.2014.10.021

Cited by 42 publications

(15 citation statements)

References 32 publications

(52 reference statements)

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“…Nonetheless, the use of FA-LWA as replacement material in SCM shows promising applicability. The increase of the FA-LWA replacement level leads to the improvement of SCM properties such as workability and flowability, although it negatively affects the SCMs strength and porosity (Güneyisi, Gesoʇlu, Altan, & Öz, 2015). Other effects of increasing FA-LWA replacement level values on SCM, are reported by Güneyisi, Gesoglu, Ghanim, Ipek, & Taha (2016).…”

Section: Cold-bonded Pellets For Less Investigated Applicationsmentioning

confidence: 97%

Cold-bonding process for treatment and reuse of waste materials: Technical designs and applications of pelletized products

Ferraro

Colangelo

Farina

et al. 2020

Critical Reviews in Environmental Science and Technology

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This work provides a comprehensive review of research on the cold-bonding pelletization process used to produce lightweight aggregates (LWAs) using waste materials, to valorise the waste and, at the same time, minimize risks related to disposal. Research investigating various aspects of the cold-bonding process highlight: i) feasible mix-designs for pellet production; ii) the most relevant operating parameters affecting the process; and iii) the potential applications of the LWAs produced. The analysis gives a wide overview of the fundamental key-points that control the cold-bonding process. Data comparison provides a useful way to identify the optimal process conditions to allow development of optimum products. This involves the selection of the correct mix-design, including suitable binders and potential additives, and the selection of appropriate operating conditions, which are a function of the waste investigated, and/or waste mix characteristics. The review proposes an optimised approach to experimental studies on cold-bonding processes that has potential to enhance future process performance. Moreover, the present work provides a complete framework useful for decision-making for both manufacturers and researchers working to use this promising technique.

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Section: Cold-bonded Pellets For Less Investigated Applicationsmentioning

confidence: 97%

Cold-bonding process for treatment and reuse of waste materials: Technical designs and applications of pelletized products

Ferraro

Colangelo

Farina

et al. 2020

Critical Reviews in Environmental Science and Technology

View full text Add to dashboard Cite

show abstract

“…According to Jiang et al [ 55 ], normal curing at room temperature was required for cold-bonded artificial aggregate to achieve the strength. However, aggregates produced using the cold bonding method required curing at room temperature or in an enclosed chamber with steam until the required strength was attained [ 56 ]. The major challenge for cold-bonded aggregate is the requirement for a longer hardening period, as it is normally required to cure for 28 days before being discharged and used as construction materials [ 34 ].…”

Section: Manufacturing Of Lightweight Aggregatementioning

confidence: 99%

“…The cold-bonded fly ash aggregate that used different molarities of alkaline activator had a specific gravity of between 1.8 and 1.85 [ 22 ]. In addition, mixing 90% of fly ash with 10% of cement by using cold bonding gives a specific gravity of 1.76 [ 56 ]. The artificial aggregate that was made up of fly ash by using the cold bonding method had a specific gravity of 1.63 as compared to normal coarse aggregate at 2.71 [ 54 ].…”

Section: Physical and Mechanical Properties Of Lightweight Aggregatementioning

confidence: 99%

Artificial Lightweight Aggregates Made from Pozzolanic Material: A Review on the Method, Physical and Mechanical Properties, Thermal and Microstructure

et al. 2022

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As the demand for nonrenewable natural resources, such as aggregate, is increasing worldwide, new production of artificial aggregate should be developed. Artificial lightweight aggregate can bring advantages to the construction field due to its lower density, thus reducing the dead load applied to the structural elements. In addition, application of artificial lightweight aggregate in lightweight concrete will produce lower thermal conductivity. However, the production of artificial lightweight aggregate is still limited. Production of artificial lightweight aggregate incorporating waste materials or pozzolanic materials is advantageous and beneficial in terms of being environmentally friendly, as well as lowering carbon dioxide emissions. Moreover, additives, such as geopolymer, have been introduced as one of the alternative construction materials that have been proven to have excellent properties. Thus, this paper will review the production of artificial lightweight aggregate through various methods, including sintering, cold bonding, and autoclaving. The significant properties of artificial lightweight aggregate, including physical and mechanical properties, such as water absorption, crushing strength, and impact value, are reviewed. The properties of concrete, including thermal properties, that utilized artificial lightweight aggregate were also briefly reviewed to highlight the advantages of artificial lightweight aggregate.

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“…Güneyisi et al [115] used silica fume (SF) and metakaolin as mineral admixtures to enhance the permeability resistance of concretes. It was reported that the use of artificial lightweight aggregate causes an increase in gas permeability.…”

Section: Permeabilitymentioning

confidence: 99%

Green and Durable Lightweight Aggregate Concrete: The Role of Waste and Recycled Materials

et al. 2020

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Lightweight aggregate concrete manufactured by solid waste or recycled by-products is a burgeoning topic in construction and building materials. It has significant merits in mitigating the negative impact on the environment during the manufacturing of Portland cement and reduces the consumption of natural resources. In this review article, the agricultural and industrial wastes and by-products, which were used as cementitious materials and artificial lightweight aggregate concrete, are summarized. Besides, the mechanical properties, durability, and a few advanced microstructure characterization methods were reviewed as well. This review also provides a look to the future research trends that may help address the challenges or further enhance the environmental benefits of lightweight aggregate concrete manufactured with solid waste and recycled by-products.

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Utilization of cold bonded fly ash lightweight fine aggregates as a partial substitution of natural fine aggregate in self-compacting mortars

Cited by 42 publications

References 32 publications

Cold-bonding process for treatment and reuse of waste materials: Technical designs and applications of pelletized products

Cold-bonding process for treatment and reuse of waste materials: Technical designs and applications of pelletized products

Artificial Lightweight Aggregates Made from Pozzolanic Material: A Review on the Method, Physical and Mechanical Properties, Thermal and Microstructure

Green and Durable Lightweight Aggregate Concrete: The Role of Waste and Recycled Materials

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