Activation of hydration properties of iron ore tailings and their application as supplementary cementitious materials in cement

Yao, Geng; Wang, Qiang; Wang, Zhiming; Wang, Junxiang; Lyu, Xianjun

doi:10.1016/j.powtec.2019.11.002

Cited by 109 publications

(32 citation statements)

References 61 publications

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“…Upon further amplification of the acicular hydration products that exist in C85IP15, there are a lot of cluster structures and some acicular hydration products even formed interpenetrating networks ( Figure 8 f). The ITP has reactivity after grinding, which has the potential to react under the stimulation of CH and gypsum [ 17 ]. Moreover, the unreacted particles form a good grade and contribute to the dense structure [ 18 ], which provides excellent strength and helps to improve the concrete strength.…”

Section: Resultsmentioning

confidence: 99%

“…The major components of the iron tailings are Fe 2 O 3 , SiO 2, and Al 2 O 3 [ 13 ], and their chemical–mineralogical constitution is readily considered as an alternative material for improving the performance of concrete [ 14 , 15 ]. Moreover, their low-cost is conducive to application in concrete production [ 16 , 17 ]. Iron tailing powder (ITP), as a product of grinding iron tailings, has pozzolanic potential and accelerates the hydration of cement [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, their low-cost is conducive to application in concrete production [ 16 , 17 ]. Iron tailing powder (ITP), as a product of grinding iron tailings, has pozzolanic potential and accelerates the hydration of cement [ 17 ]. Furthermore, the unreacted particles can form a good grade, contributing to form the dense structure and to improving the mechanical strength of concrete [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effects of Curing Conditions on the MECHANICAL and Microstructural Properties of Ultra-High-Performance Concrete (UHPC) Incorporating Iron Tailing Powder

Zhong

Yan

et al. 2021

Materials

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It has been reported that iron tailing powder (ITP) has the potential to partially replace cement to prepare ultra-high-performance concrete (UHPC). However, the reactivity of ITP particles in concrete largely depends on the curing method. This study investigates the effects of curing conditions on the mechanical and microstructural properties of UHPC containing ITP. To achieve this objective, three research tasks are conducted, including (1) preparing seven concrete formulations by introducing ITP; (2) characterizing their mechanical performance under different curing regimes; and (3) analyzing their microstructure by XRD patterns, FTIR analysis, and SEM observation. The experimental results show that there is an optimum ITP dosage (15%) for their application. The concrete with 15% ITP under standard curing obtains 94.3 MPa at 7 days, their early-age strength could be even further increased by ~30% (warm-water curing) and ~35% (steamed curing). The steam curing regime stimulates the activity of ITP and refines the microstructure. This study demonstrates the potential of replacing Portland cement with ITP in UHPC production.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of Curing Conditions on the MECHANICAL and Microstructural Properties of Ultra-High-Performance Concrete (UHPC) Incorporating Iron Tailing Powder

Zhong

Yan

et al. 2021

Materials

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show abstract

“…Moreover, the sample CITP15 reaches the highest strength value at 28 days (148.8 MPa). e addition of ITP accelerated the hydration of cement [22] and promoted the generation of hydration products [30]. Also, the fine ITP particles filled the voids and contributed to the strength of concrete [24,26].…”

Section: Compressive Strengthmentioning

confidence: 99%

“…e use of iron tailing powder (ITP) could be considered an ideal alternative cementitious material in concrete-related applications [19], because of its abundant storage [20] and low-cost [19]. Meanwhile, the outstanding pozzolanic reactivity [21,22] and the filling effect of ITP particles enable it to replace cement partially, thereby reducing the CO 2 emission caused by Portland cement in concrete production. Additionally, the fine ITP particles had a large surface area, which conduces to accelerating the cement hydration and helps to generate a compact cement matrix with more calcium silicate hydrates (C-S-H gel) and less CH [20].…”

Section: Introductionmentioning

confidence: 99%

The Role of Iron Tailing Powder in Ultra‐High‐Strength Concrete Subjected to Elevated Temperatures

Huang

Zhang

et al. 2021

Advances in Civil Engineering

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Iron tailing powder (ITP) is considered to have the potential to replace cement to manufacture ultra-high-performance concrete (UHPC). However, the performance of UHPC with the addition of ITP after exposure to high temperatures is more complex. This investigation prepares seven UHPC formulations by introducing different contents of ITP and investigates the mechanical behavior (residual strength), bound water content, and microstructural properties (crystalline and amorphous phases, chemical structure, and morphology) of UHPC subjected to elevated temperatures. The experimental results show that the addition of ITP postpones the spalling of concrete when exposed to high temperatures. The concrete incorporating 15% ITP maintains 53.8% of its original strength at 800°C, unlike the concrete without ITP that maintains 31.6% of its original strength. The addition of ITP increases the number of micropores/cracks in concrete and helps release the vapor pressure caused by water evaporation. The findings of this investigation highlight the potential application of ITP for future UHPC design and manufacture.

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CNT grown in situ from iron ore tailings: simple dispersion and environmental sustainability

Zerbini Costal,

da Silva Calderón-Morales,

do Carmo Lima Carvalho

et al. 2023

J Nanopart Res

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Activation of hydration properties of iron ore tailings and their application as supplementary cementitious materials in cement

Cited by 109 publications

References 61 publications

Effects of Curing Conditions on the MECHANICAL and Microstructural Properties of Ultra-High-Performance Concrete (UHPC) Incorporating Iron Tailing Powder

Effects of Curing Conditions on the MECHANICAL and Microstructural Properties of Ultra-High-Performance Concrete (UHPC) Incorporating Iron Tailing Powder

The Role of Iron Tailing Powder in Ultra‐High‐Strength Concrete Subjected to Elevated Temperatures

CNT grown in situ from iron ore tailings: simple dispersion and environmental sustainability

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