Eco-friendly treatment of low-calcium coal fly ash for high pozzolanic reactivity: A step towards waste utilization in sustainable building material

Yang, Jin; Huang, Jianxiang; Su, Ying; He, Xingyang; Tan, Hongbo; Yang, Wei; Strnadel, Bohumír

doi:10.1016/j.jclepro.2019.117962

Cited by 193 publications

(56 citation statements)

References 62 publications

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“…And, the higher BOFS content the lower early strength, due to the relatively lower pozzolanic reactivity than cement. is is similar to some other supplementary materials, such as lowcalcium fly ash [33,60]. Figure 10 presents the relationship between compressive strength (in Table 6) and pore structure for BOFS-blended composites.…”

Section: Link Of Mechanical Strength With Pore Structuresupporting

confidence: 69%

Fluid Permeability of Ground Steel Slag‐Blended Composites Evaluated by Pore Structure

Yang

Jian

et al. 2020

Advances in Materials Science and Engineering

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The resource utilization of steel slag has attracted wide attention. In the present work, the pore structure of cement paste with and without ground basic oxygen furnace slag (BOFS) up to 180 days was investigated by mercury intrusion porosimetry. Permeability was evaluated from the tested pore structure. Results indicate that the porosity, critical pore radius, pore-throat radius, and permeability are increased with the BOFS content and levels off after 28 days. Lower gel porosity and higher coarse capillary porosity were observed in BOFS-blended composites. The calculated permeability (around 0.30–7.49 × 10−19 m2) based on the pore structure agrees well with the range of reported experimental measurements. Well-correlated linear and power-law relationship was noticed between permeability and porosity and characteristic pore radius, respectively.

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Section: Link Of Mechanical Strength With Pore Structuresupporting

confidence: 69%

Fluid Permeability of Ground Steel Slag‐Blended Composites Evaluated by Pore Structure

Yang

Jian

et al. 2020

Advances in Materials Science and Engineering

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“…In addition, concrete has been produced with traditional supplementary cementitious materials (SCMs) that possess a high pozzolanic activity [10], such as fly ash (FA) [11][12][13][14], silica fume (SF) [15][16][17] and ground granulated blast slag (GGBS) [2,[18][19][20][21] that yielded notable improvement in strength and durability. Numerous industrial solid by-products containing calcareous siliceous, and aluminous materials (fly ash, ultrafine fly ash, silica fume, etc.…”

Section: Introductionmentioning

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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“…Allahverdi et al 17 produced the chemically activated high phosphorous slag content cement and confirmed that the mortar made with this cement had perfect mechanical strength but weak durability performance. Mechanical activation technique has been widely used to promote the reactivity of mineral admixtures, since it has become easier to obtain ultrafine mineral admixtures with the progress of grinding technology 11,13,18 . The mechanical grinding technique by increasing the specific surface area of PHS could effectively improve the pozzolanic reactivity of PHS [13][14][15][16] .…”

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confidence: 99%

Effects of Fineness and Content of Phosphorus Slag on Cement Hydration, Permeability, Pore Structure and Fractal Dimension of Concrete

et al. 2021

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The utilization of phosphorus slag (PHS) to replace the fly ash in the construction of hydraulic projects has attracted a growing attention in China. In this study, the influence of PHS fineness and content on cement hydration, mechanical strength, permeability as well as the pore structure and fractal dimension (Ds) of concrete have been discussed. The results indicate that the PHS addition retards the cement hydration and hence decreases the hydration heat within 3 days. The incorporation of PHS with a Blaine specific surface area of 505 m 2 /kg (PHS) could participate in the early pozzolanic reaction and consequently offsets the retarding effect to some extent. The incorporation of 20-40 w% PHS declines the early strength of concrete, but this reduction effect on strength can be eliminated to some degrees by mechanically grinding the PHS. The compressive strengths of concrete added with PHS with a high fineness of 505 m 2 /kg

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Eco-friendly treatment of low-calcium coal fly ash for high pozzolanic reactivity: A step towards waste utilization in sustainable building material

Cited by 193 publications

References 62 publications

Fluid Permeability of Ground Steel Slag‐Blended Composites Evaluated by Pore Structure

Fluid Permeability of Ground Steel Slag‐Blended Composites Evaluated by Pore Structure

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

Effects of Fineness and Content of Phosphorus Slag on Cement Hydration, Permeability, Pore Structure and Fractal Dimension of Concrete

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