Experimental Study and Modeling of Concrete Containing AOD Steel Slag for Pavements

Gupta, Tanvi; Sachdeva, S. N.

doi:10.1007/s13369-020-04619-y

Cited by 7 publications

(7 citation statements)

References 36 publications

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“…According to the experimental results, the addition of ZSF to the concrete mix as a partial replacement of cement increased the compressive strength of the concrete. These results reveal similar trends that are consistent with all previous studies [ 70 , 74 , 75 ]. A positive increase in compressive strength was observed which was more noticeable in standard concrete mix (i.e., reference concrete mix) as compared to the concrete mix containing ZSF.…”

Section: Resultssupporting

confidence: 93%

“…The two-way analysis of variance (ANOVA) normally scrutinizes the influence of two independent variables on their outcome [ 74 , 75 , 83 , 84 , 85 ]. In the present study, the effect of two independent variables (i.e., WRAP40 concrete mix and DRAP40 concrete mix) on a continuous dependent variable (such as Density, 28-days compressive, 28-days Flexural strength and 28-days split tensile strengths) has been determined by two-way ANOVA test at 5% significant level (α).…”

Section: Discussionmentioning

confidence: 99%

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Feasibility Study of Reclaimed Asphalt Pavements (RAP) as Recycled Aggregates Used in Rigid Pavement Construction

et al. 2023

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Reclaimed Asphalt Pavement (RAP) as recycled aggregates is a relatively new construction process of rigid pavements due to the scarcity and degradation of natural aggregates. This study aims at the sequential characterization of RAP aggregate to obtain optimized proportions for strength. For this purpose, RAP aggregates were used for the replacement of natural aggregates (NA) in the concrete mix which was achieved by varying from 0–100%. Furthermore, zirconia silica fume (ZSF) was used as a partial replacement of the cement in the concrete mix, replacing Ordinary Portland Cement (OPC). Experimental studies have shown that the incorporation of washed RAP (WRAP) slightly reduces the compressive strength of concrete by 2.7–37.35% as compared to the reference control concrete mix. Although the 7-days, 28-days and 56-day compressive strength of WRAP recycled aggregate-based concrete is slightly better than the 7-days, 28-days and 56-day compressive strength of dirty RAP (DRAP) recycled aggregate-based concrete. A similar trend was observed in the flexural strength and split tensile strength of WRAP recycled aggregate-based. Overall, the results show that 40% WRAP recycled aggregates with 10% ZSF as a replacement for cement outperform DRAP aggregates in concrete mixes. According to the ANOVA results, the combination of ZSF and WRAP aggregates met the cement concrete pavement strength standard, thereby contributing to sustainable development. Reclaimed Asphalt Concrete Pavements (RACP) are now seen as a potential and long-term answer to the present environmental and economic crisis.

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Section: Resultssupporting

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Feasibility Study of Reclaimed Asphalt Pavements (RAP) as Recycled Aggregates Used in Rigid Pavement Construction

et al. 2023

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“…[ 13 ] It has been found that steel slag can be broadly applied in the construction field, for example, to be used in blended cement manufacturing[ 14 , 15 ]; to be used as a granular material in road base or subbase courses[ 16 , 17 ] or an aggregate in various asphalt mixes or pavement surfaces. [ 18 – 20 ] In particular, making cement from steel slag has received widespread attention,[ 21 – 23 ] but the free lime volume instability of steel slag limits this application. [ 24 ] This is mainly because steel slag contains the f-CaO mineral phase,[ 25 , 26 ] f-CaO hydrates to form Ca(OH) 2 when it meets water,[ 27 ] which causes cracking of concrete engineering, roads, and building materials.…”

Section: Introductionmentioning

confidence: 99%

Three-Stage Method Energy–Mass Coupling High-Efficiency Utilization Process of High-Temperature Molten Steel Slag

Chen

Wang

Liu

et al. 2021

Metall Mater Trans B

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High-temperature molten steel slag is a large amount of industrial solid waste containing available heat energy and resources. This paper introduces an efficient and comprehensive utilization process of high-temperature molten steel slag. The waste heat energy in the high-temperature molten steel slag can be fully recovered through the three-stage heat exchange. Through mass balance and energy balance, the theoretical heat recovery rate can reach 81.42 pct when the waste heat stored in steel slag is converted into usable heat energy, and the exergy efficiency of the overall system is 27.93 pct. When the waste heat stored in the steel slag is converted for electric energy, the theoretical heat recovery rate can reach 24.49 pct, and the exergy efficiency of the overall system is 33.83 pct. When the waste heat stored in steel slag is used for cogeneration, the theoretical heat recovery rate can reach 83.98 pct, and the exergy efficiency of the overall system is 38 pct. The normal-temperature solid steel slag produced by the process is easy for iron selection and subsequent high value-added utilization. The solidification of steel slag in this process consumes a large amount of CO 2 so that the free calcium oxide (f-CaO) in the steel slag is fixed, which is more conducive to subsequent utilization, thereby achieving the purpose of energy saving and emission reduction. Compared with the utilization of traditional steel slag, this process can better utilize the energy and resources contained in steel slag and provides a new method for fully utilizing the waste heat energy and resource attributes of high-temperature molten steel slag. Supplementary Information The online version of this article (10.1007/s11663-021-02213-7).

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“…Except for cementitious characteristics, the potential environmental issues related to the leaching risk of chromium must be considered when AODS was utilized as a cement substitute. The recycling of AODS was very limited due to its high Cr content (0.5-5 wt.%) [13,[25][26][27]. Studies have shown that the chromium leaching risk of AODS is usually underestimated [7].…”

Section: Introductionmentioning

confidence: 99%

“…The existence of chromium in AODS has its characteristics [40], but researchers also need to obtain information on how chromium is present in the cement-based composite material that has undergone the S/S process to beneficial assessing chromium leachability. While studying the maximum applicability of AODS in cement, it is also necessary to consider the potential ecological risks of chromium introduced by the incorporated AODS [26].…”

Section: Introductionmentioning

confidence: 99%

Cementitious Behavior of Argon Oxygen Decarburization Stainless Steel Slag and Its Stabilization on Chromium

Wang

Zeng

et al. 2020

Crystals

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The study mainly aims at the potential of Argon Oxygen Decarburization Slag (AODS) as a supplementary cementitious material and explores the mechanisms of stabilization/solidification (S/S) of chromium in cement-based composite pastes. The basic cementitious parameters, such as water requirement, setting time, soundness, hydration characteristics, and strength indexes of composite binders, were examined through standard methods. The results showed that the most beneficial mineral phase in AODS for cementitious behavior was beta dicalcium silicate (β-C2S). The utilization of a higher AODS dosage in composite binders increased the water requirement and the setting time, while it decreased the hydration heat and the strength indexes. Although the AODS possessed limited cementitious properties, it conformed the Grade II steel slag powder qualified for concrete and cement. Sequential leaching tests were conducted targeting the leachability of chromium in the pastes with different AODS dosage and curing time. Results showed that with the lower AODS dosage and the longer curing time, the S/S efficiency for chromium leaching from the composite paste was better. Utilization of AODS as a cement substitute not only can recycle this solid waste and decrease the emission of CO2 concerning cement production, but also helps to effectively reduce the chromium leaching risk.

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Experimental Study and Modeling of Concrete Containing AOD Steel Slag for Pavements

Cited by 7 publications

References 36 publications

Feasibility Study of Reclaimed Asphalt Pavements (RAP) as Recycled Aggregates Used in Rigid Pavement Construction

Feasibility Study of Reclaimed Asphalt Pavements (RAP) as Recycled Aggregates Used in Rigid Pavement Construction

Three-Stage Method Energy–Mass Coupling High-Efficiency Utilization Process of High-Temperature Molten Steel Slag

Cementitious Behavior of Argon Oxygen Decarburization Stainless Steel Slag and Its Stabilization on Chromium

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