Self-cementitious property of steel slag powder blended with gypsum

Zhao, Jihui; Wang, Dongmin; Yan, Peiyu; Zhang, Dawang; Wang, Hao

doi:10.1016/j.conbuildmat.2016.03.102

Cited by 78 publications

(22 citation statements)

References 26 publications

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“…In contrast to the strength development at 7 days, the pozzolanic activity of the steel slag began to play an important role in contributing to the strength. Similar results were observed in the works of Zhang et al [21].…”

Section: The Compressive Strengthsupporting

confidence: 92%

“…Extensive research has been devoted to the properties of mortars or concretes with SS incorporated, and the results indicate that SS is advantageous in terms of the mechanical strength and durability of the hardened mortars and concretes [13][14][15][16][17][18][19][20][21]. Tsakiridis et al [8] found that SS cement consisting of 10.5 % SS in the raw meal showed comparable properties to the reference sample in terms of the setting time and compressive strength.…”

Section: Introductionmentioning

confidence: 99%

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The Influence of Steel Slag With Variable Particle Size Distribution on the Workability and Mechanical Properties of Concrete

Zang¹

2018

Ceramics - Silikaty

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The present research investigated the influence of steel slag (SS) with variable particle size on the workability and mechanical properties of concrete. Different SS size ranges (0-15 μm, 15-30 μm, 30-45 μm and 45-80 μm) were obtained by sieving and then were characterised by a laser particle size analyser and a scanning electron microscope (SEM). The slump, compressive strength, pore structures and thermal analysis were used to evaluate the effect of the SS particle size on cement and concrete properties. The experimental results showed that finer SS (0-15 μm and 15-30 μm) resulted in negative effects on the workability, while 30-45 μm and 45-80 μm SS particles presented completely opposite results. Both of these effects were more apparent as the steel slag replacement ratio was increased up to 30 wt. %. Concrete samples with 0-15 μm and 45-80 μm SS particles presented comparable 7-and 28-day compressive strength to the control concrete when their replacement ratios were less than 10 wt. %. Moreover, the concrete samples with 45-80 μm SS particles at 5 % dosage developed the highest compressive strengths at 7 and 28 days, which were 2 % and 5 % higher than the control sample, respectively. The pore structure results indicated that a composition of 5 % 45-80 μm SS particles was advantageous for refining the pore structures of cement paste, further contributing to the 28-day compressive strength development of concrete.

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Section: The Compressive Strengthsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

The Influence of Steel Slag With Variable Particle Size Distribution on the Workability and Mechanical Properties of Concrete

Zang¹

2018

Ceramics - Silikaty

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“…3.6 XRD analysis X-ray diffraction is used to identify phases formed during hydration. Figure 9 shows the XRD patterns of the blend cement binders with 20% amount and the refer- ence sample curing for 28 days (Lothenbach et al 2015;Zhao et al 2016). The main hydration products including silicate, aluminate, calcite and magnesium phases such as portlandite, bluecite and lizardite are showed in the patterns.…”

Section: Liner Shrinkagementioning

confidence: 99%

Study on Physical and Chemical Properties of High Magnesium Nickel Slag-Phosphogysum Composite Cementitious Materials in Different Particle Sizes

Wang

Zhang

et al. 2020

ACT

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High-magnesium nickel slag (HMNS) and phosphogypsum (PG) are hazardous industrial solid waste. The present work focuses on the feasibility of using the two materials as supplementary cementitious materials (SCM) added to cement. The slag and gypsum were ground into different specific surface area (2235 cm 2 /g, 3040 cm 2 /g and 3900 cm 2 /g), then mixed into ten different samples. The effect of SCM addition was detected by isothermal conduction calorimetry (ICC) testing, compressive strength, mercury intrusion porosimetry (MIP), X-ray diffraction (XRD), scanning electron microscope (SEM) and linear shrinkage. The results showed that the HMNS-PG composite cementitious material with suitable specific surface area has relatively high activity, and a small amount of gel and alumina-ferric oxide-trisulfate (AFt or ettringite) are detected in HMNS-PG composite cementitious material. According to the results, the high-magnesium nickel slag could be together with phosphogypsum as substitutes for cement, improved the utilization rate of industrial waste and reduced environmental pollution.

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“…The hydration rate of steel slag at the early age could be accelerated by raising the fineness of particles, curing temperature or alkalinity of the solution. Zhao et al [15] revealed the effect of gypsum in the cementitious paste containing SM slag, wherein a similar hydration process with normal cement paste was shown and the addition of gypsum increased the hydration rate at the early age. In summary, the literature confirms the possibility of using EAF slag as a binder and eco-friendly material with high durability [2,10,11,12,14,15].…”

Section: Literature Reviewmentioning

confidence: 99%

“…Zhao et al [15] revealed the effect of gypsum in the cementitious paste containing SM slag, wherein a similar hydration process with normal cement paste was shown and the addition of gypsum increased the hydration rate at the early age. In summary, the literature confirms the possibility of using EAF slag as a binder and eco-friendly material with high durability [2,10,11,12,14,15]. However, published studies on the material properties of EAF slag concrete are limited, and there is a need for further data, especially on the effect of setting time and shrinkage behavior for practical use.…”

Section: Literature Reviewmentioning

confidence: 99%

Comparing Properties of Concrete Containing Electric Arc Furnace Slag and Granulated Blast Furnace Slag

et al. 2019

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For sustainable development in the construction industry, blast furnace slag has been used as a substitute for cement in concrete. In contrast, steel-making slag, the second largest by-product in the steel industry, is mostly used as a filler material in embankment construction. This is because steel-making slag has relatively low hydraulicity and a problem with volumetric expansion. However, as the quenching process of slag has improved recently and the steel making process is specifically separated, the properties of steel-making slag has also improved. In this context, there is a need to find a method for recycling steel-making slag as a more highly valued material, such as its potential use as an admixture in concrete. Therefore, in order to confirm the possibility of using electric arc furnace (EAF) oxidizing slag as a binder, a comparative assessment of the mechanical properties of concrete containing electric arc furnace oxidizing slag, steel-making slag, and granulated blast furnace (GBF) slag was performed. The initial and final setting, shrinkage, compressive and split-cylinder tensile strength of the slag concretes were measured. It was found that replacing cement with EAF oxidizing slag delayed the hydration reaction at early ages, with no significant problems in setting time, shrinkage or strength development found.

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Self-cementitious property of steel slag powder blended with gypsum

Cited by 78 publications

References 26 publications

The Influence of Steel Slag With Variable Particle Size Distribution on the Workability and Mechanical Properties of Concrete

The Influence of Steel Slag With Variable Particle Size Distribution on the Workability and Mechanical Properties of Concrete

Study on Physical and Chemical Properties of High Magnesium Nickel Slag-Phosphogysum Composite Cementitious Materials in Different Particle Sizes

Comparing Properties of Concrete Containing Electric Arc Furnace Slag and Granulated Blast Furnace Slag

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