Application of steel slag in cement treated aggregate base course

Liu, Jinzhou; Yu, Bin; Wang, Qian

doi:10.1016/j.jclepro.2020.121733

Cited by 127 publications

(52 citation statements)

References 35 publications

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“…A small amount of steel slag will not have a negative impact on the quality of cement produced, but the excessive amount of steel slag will inhibit the early hydration of cement [60]. For GGFBS (ground granulated blast furnace slag) concrete, the hydraulic strength of concrete with GGFBS content less than 50% begins to increase at 7 days, the compressive strength at 28 days is basically the same as that of ordinary concrete, and the compressive strength at 56 days is higher than that of ordinary concrete [61].…”

Section: Application Statusmentioning

confidence: 99%

“…It was found that the addition of steel slag increased the concentration of Ca in pore solution, reduced the supersaturation of pore solution relative to C−H, inhibited the nucleation and growth of C−S−H, and blocked the initial setting of cement slurry. A small amount of steel slag will not have a negative impact on the quality of cement produced, but the excessive amount of steel slag will inhibit the early hydration of cement [60]. For GGFBS (ground granulated blast furnace slag) concrete, the hydraulic strength of concrete with GGFBS content less than 50% begins to increase at 7 days, the compressive strength at 28 days is basically the same as that of ordinary concrete, and the compressive strength at 56 days is higher than that of ordinary concrete [61].…”

Section: Application Statusmentioning

confidence: 99%

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Hydration Activity and Carbonation Characteristics of Dicalcium Silicate in Steel Slag: A Review

Hao

Wang

Zhang

et al. 2021

Metals

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Dicalcium silicate is one of the main mineral phases of steel slag. Ascribed to the characteristics of hydration and carbonation, the application of slag in cement production and carbon dioxide sequestration has been confirmed as feasible. In the current study, the precipitation process of the dicalcium silicate phase in steel slag was discussed. Meanwhile, the study put emphasis on the influence of different crystal forms of dicalcium silicate on the hydration activity and carbonation characteristics of steel slag. It indicates that most of the dicalcium silicate phase in steel slag is the γ phase with the weakest hydration activity. The hydration activity of γ-C2S is improved to a certain extent by means of mechanical, high temperature, and chemical activation. However, the carbonation activity of γ-C2S is about two times higher than that of β-C2S. Direct and indirect carbonation can effectively capture carbon dioxide. This paper also summarizes the research status of the application of steel slag in cement production and carbon dioxide sequestration. Further development of the potential of dicalcium silicate hydration activity and simplifying the carbonation process are important focuses for the future.

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Section: Application Statusmentioning

confidence: 99%

Section: Application Statusmentioning

confidence: 99%

Hydration Activity and Carbonation Characteristics of Dicalcium Silicate in Steel Slag: A Review

Hao

Wang

Zhang

et al. 2021

Metals

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“…Zang et al (2019) proved that the stabilization of the EMR and Red mud in the road bases achieved adequate strength and make it environmentally friendly [1]. The replacement of conventional aggregates with 50% steel slag stabilized with 4% cement content achieved maximum strength and stiffness along with other economic benefits [2]. At the same time, the use of cement treated recycled glass up to 30% along with the other recycled materials achieved required strength properties [3].…”

Section: Introductionmentioning

confidence: 99%

Applications of Cement in Pavement Engineering

Chakravarthi¹,

Kumar²,

Shankar³

2021

Cement Industry - Optimization, Characterization and Sustainable Application

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Recycled materials primarily Reclaimed Asphalt Pavement (RAP), and Recycled Concrete Aggregate (RCA) are produced from pavement rehabilitation and construction-demolition activities. Generally, these materials are utilized for landfills, parking lots, shoulders, and other places that are not environmentally friendly. The top layers of the pavement and concrete structures are constructed using superior qualities of aggregates that satisfy the specification. During their service life, the aggregates present in these structures undergo deterioration due to environmental and traffic factors. After reaching the end of their service life, the deteriorated structures are dismantled and considered as waste. Nevertheless, these recycled materials will have some retain value which can be used in different layers of the pavements in different percentages. The reuse of these materials in place of conventional aggregates preserves the environment and become a sustainable construction practice. Further, the direct utilization of these materials in the pavements may not satisfy the mechanical characteristics. To fulfill these gaps, cement stabilization of recycled materials is the best option. With this background, the proposed book chapter will highlight the usage of cement in pavement application, and a few types of research works carried in cement treated pavement layers will be discussed in a detailed and scientific manner.

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“…The green sustainable development of cement has been a concern of international scholars, and research focus has mainly been on energy conservation, emission reduction and environmental protection, in order to meet the needs of carbon neutrality. Industrial solid wastes, such as fly ash, and blast furnace and steel slag, have been widely used as supplementary cementitious materials in the field of cement and concrete [ 4 , 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

Rapid Evaluation of the Pozzolanic Activity of Bayer Red Mud by a Polymerization Degree Method: Correlations with Alkali Dissolution of (Si+Al) and Strength

et al. 2021

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A large amount of Bayer process red mud is discharged in the process of alumina production, which has caused significant pollution in the environment. The pozzolanic activity of Bayer red mud as a supplementary cementitious material is a research hotspot. In this work, a new method for Fourier-transform infrared spectrometry is used to determine the polymerization degree of Bayer red mud in order to evaluate its pozzolanic activity. Based on the results of the dissolution concentration of (Si+Al), strength index and polymerization degree of Bayer red mud, the relationships between different evaluation methods were analyzed, and the relevant calculation formulas of pozzolanic activity were obtained. The results showed that different evaluation methods can reflect the variation law of pozzolanic activity in Bayer red mud. The polymerization degree of Bayer red mud had a good linear relationship with the pozzolanic activity index obtained by the strength index and dissolution concentration of (Si+Al), respectively. The polymerization degree was negatively correlated with pozzolanic activity index and dissolution concentration of (Si+Al), and the correlation coefficients were greater than 0.85. Therefore, this method was found to be effective and hence can be used as a rapid and simple test for pozzolanic activity evaluation of Bayer red mud.

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Application of steel slag in cement treated aggregate base course

Cited by 127 publications

References 35 publications

Hydration Activity and Carbonation Characteristics of Dicalcium Silicate in Steel Slag: A Review

Hydration Activity and Carbonation Characteristics of Dicalcium Silicate in Steel Slag: A Review

Applications of Cement in Pavement Engineering

Rapid Evaluation of the Pozzolanic Activity of Bayer Red Mud by a Polymerization Degree Method: Correlations with Alkali Dissolution of (Si+Al) and Strength

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