Greener self-compacting concrete using stainless steel reducing slag

Sheen, Yeong-Nain; Le, Duc-Hien; Sun, Tao

doi:10.1016/j.conbuildmat.2015.02.081

Cited by 31 publications

(9 citation statements)

References 35 publications

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“…This finding can also be explained by the setting times presented in Table 3 . In particular, increasing the dosage of the BOF increases the initial and final setting times, which is because the retardation of the hardening process caused by the lack of the cement and low hydration rate of additives [ 61 ]. In the case of 1% BOF, the initial and final setting times are observed to be similar.…”

Section: Components Production and Experimental Testing Of Bof-ementioning

confidence: 99%

Blended Cement Mixed with Basic Oxygen Steelmaking Slag (BOF) as an Alternative Green Building Material

et al. 2020

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Portland cement tends to exhibit negative environmental impacts; thus, it is required to find measures that will improve its green credentials. In this study, we report a blended Portland slag cement as an alternative environmentally-friendly building material in order to reduce the total carbon footprint resulted from the production of the ordinary Portland cement (OPC), which may resolve the environmental issues associated with carbon dioxide emissions. The ordinary Portland cement type I enhanced by basic oxygen steelmaking slag (BOF) is produced and casted into cubic and beam-like samples for the compressive and three-point bending tests, and the compressive and flexural strengths are experimentally measured. Numerical simulations are conducted to compare with the experimental result and satisfactory agreements are obtained. X-ray diffraction (XRD) investigations and porosity tests are then carried out using the semi-adiabatic calorimetry, which indicates that 5% BOF is the optimal ratio to accelerate the hydration process while increasing the amount of hydration products, especially at the early curing age of 3 days. Scanning electron microscope (SEM) images further indicate that BOF can be used to prevent the development of microcracks while mitigating their propagation within cement mortar. Our study indicates that the compressive strength of OPC can be critically increased by BOF at the relatively low concentrations of 5%. The blended slag cement reported in this paper provides advanced understanding on the green building material that uses byproduct wastes for the mechanical and electrical performance.

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Section: Components Production and Experimental Testing Of Bof-ementioning

confidence: 99%

Blended Cement Mixed with Basic Oxygen Steelmaking Slag (BOF) as an Alternative Green Building Material

et al. 2020

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“…The concrete performance remains unchanged at a replacement ratio of 0%-10% and the slump gradually decreases; at a replacement ratio of 10%-50%, the slump gradually increases. This increase in slump may be attributed to the reduction in the volume and size of voids owing to the presence of the steel slag powder [64]. This also explains the decrease in slump at a replacement ratio of 10%.…”

Section: Influence Of Slag On the Workability Of Racmentioning

confidence: 93%

Effect of Recycled Aggregate and Slag as Substitutes for Natural Aggregate and Cement on the Properties of Concrete: A Review

Zhang¹,

Wang²,

Zheng³

et al. 2023

Journal of Renewable Materials

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Using recycled aggregate (RA) and slag instead of natural aggregate (NA) and cement can reduce greenhouse gas emissions (GHGE) and achieve effective waste recovery. In recent years, RA has been widely used to replace NA in concrete. Every year, several researchers conduct investigations on the mechanical performance and durability of recycled aggregate concrete (RAC). Due to the loose and porous material properties of RA, the mechanical properties and durability of RAC, such as strength, carbonation resistance, permeability resistance and chloride ion penetration resistance, are greatly reduced compared with natural aggregate concrete. In contrast, concrete containing slag instead of NA and cement generally improved the strength of concrete and reduced the internal porosity of materials. Herein, we discuss the effects of RA and slag on the workability, compressive strength, splitting tensile strength, ultrasonic pulse velocity (UPV) value, and elastic modulus of concrete. The relationships between the compressive strength and the splitting tensile strength, UPV value, and elastic modulus are discussed, and the optimal substitution method is proposed. In addition, various equations for calculating the compressive strength of concrete based on performance factors related to the compressive strength are summarized.

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“…Müller et al [6] outlined methods to evaluate and decrease the environmental impact of concrete, and means to enhance its performance. The results of an investigation on self-compacting concrete made with stainless steel reducing slag were reported by Sheen et al [7]. The influence of the curing time on the fracture toughness of concrete produced with different concentrations of coal fly ash was assessed by Golewski [8].…”

Section: Introductionmentioning

confidence: 94%

How Aware and Active is the Swedish Building and Real Estate Sector in Climate-Smart Concrete?

Bahrami¹,

Awn²,

Corona³

et al. 2022

IJETT

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Carbon dioxide has long proven to be one of the greenhouse gases that affects our planet's climate and environment. With the forthcoming European Union goals and Sweden's own net-zero goal, it is required that the building and real estate sector works with climate-smart materials to construct future buildings. The net-zero goal by 2045 requires a common effort from all companies to find innovative solutions in order to reduce carbon dioxide emissions sharply. This study investigates how aware and active the building and real estate sector is in climatesmart concrete (CSC) through a survey and comparison of environmental product declarations (EPDs). Climatesmart is a term for concrete that contains a lower percentage of Portland cement clinker than traditional concrete. This research aims to examine how far the development has taken place and to evaluate how the market has adopted the newly available products. It is also assessed which alternative additive materials are the most common as well as advantages and disadvantages of the CSC. A questionnaire is created, and the survey is sent out to companies. A comparison is made between three different EPDs of the CSC and two references for concrete with the ordinary Portland cement clinker. Reference concrete 1 is a standard value, and reference concrete 2 is an EPD value. A reference building is used to calculate the volume and weight of its utilized concrete. The three types of the CSC are compared with the reference concrete 1, and the results show a carbon dioxide reduction of 29.3%. However, the comparison of these three types of the CSC with the reference concrete 2 demonstrates a carbon dioxide reduction of 2.8%. In addition, it is concluded that the future will require the building and real estate sector to invest time and training to work with the CSC further.

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Greener self-compacting concrete using stainless steel reducing slag

Cited by 31 publications

References 35 publications

Blended Cement Mixed with Basic Oxygen Steelmaking Slag (BOF) as an Alternative Green Building Material

Blended Cement Mixed with Basic Oxygen Steelmaking Slag (BOF) as an Alternative Green Building Material

Effect of Recycled Aggregate and Slag as Substitutes for Natural Aggregate and Cement on the Properties of Concrete: A Review

How Aware and Active is the Swedish Building and Real Estate Sector in Climate-Smart Concrete?

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