Carbonated Ladle Slag Fines for Carbon Uptake and Sand Substitute

Monkman, Sean; Shao, Yixin; Shi, Caijun

doi:10.1061/(asce)0899-1561(2009)21:11(657)

Cited by 55 publications

(31 citation statements)

References 10 publications

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“…Sean Monkman, Yixin Shao, Caijun Shi, 2009 [9] investigated the possibility of using a carbonated LF slag as a fine aggregate in concrete. The slag was treated with CO 2 to reduce the free lime content while binding gaseous CO 2 into solid carbonates.…”

Section: Literature Reviewmentioning

confidence: 99%

Utilization of Industrial Waste Slag as Aggregate in Concrete Applications by Adopting Taguchi’s Approach for Optimization

Nadeem¹,

Pofale²

2012

OJCE

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This paper presents result of an experimental investigation carried out to evaluate effects of replacing aggregates (coarse & fine) with that of Slag (Crystallized & Granular) which is an industrial waste by-product on concrete strength properties by using Taguchi's approach of optimization. Whole study was done in three phases, in the first phase natural coarse aggregate was replaced by crystallized slag coarse aggregate keeping fine aggregate (natural sand) common in all the mixes, in the second phase fine aggregate (natural sand) was replaced by granular slag keeping natural coarse aggregate common in all the mixes and in the third phase both the aggregates were replaced by crystallized & granular aggregates. The study concluded that compressive strength of concrete improved almost all the % replacements of normal crushed coarse aggregate with crystallized slag by 5% to 7%. In case of replacements of fine aggregate and both type of aggregates, the strength improvements were notably noticed at 30% to 50% replacement level. It could also be said that full substitution of slag aggregate with normal crushed coarse aggregate improved the flexure and split tensile strength by 6% to 8% at all replacements and in case of replacing fine aggregate & both the aggregates( Fine & coarse) with slag, the strength improvement was at 30% to 50% replacements. It is evident from the investigation that Taguchi approach for optimization helped in indentifying the factors affecting the final outcomes. Based on the overall observations, it could be recommended that Slag could be effectively utilized as coarse & fine aggregates in all concrete applications.

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Section: Literature Reviewmentioning

confidence: 99%

Utilization of Industrial Waste Slag as Aggregate in Concrete Applications by Adopting Taguchi’s Approach for Optimization

Nadeem¹,

Pofale²

2012

OJCE

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“…However, in the case of, for instance, fresh BOFS, several challenges exist in terms of its utilization as a concrete product or a road base material: (1) it is hard, so grinding to a certain fineness as SCMs is energy-intensive and costly; (2) the strength of the cement mortar is low, especially for early stage; and (3) free-CaO and -MgO may lead to fatal expansion of hardened cement-BOFS paste (Monkman et al, 2009;Wu et al, 2009;Zhang et al, 2011). According to a report from the Portland Cement Association (Caldarone et al, 2005), the use of SCMs in blended cement may reduce the early-age strength and increase the later-age strength of the concrete, as compared with the use of only Portland cement.…”

Section: Utilization Of Carbonated Product As Supplementary Cementitimentioning

confidence: 99%

“…The use of carbonated steelmaking slag as SCMs offers several benefits (Monkman et al, 2009;Pan et al, 2015a): (1) keep globally available industrial alkaline solid wastes out of landfills; (2) provide an economic approach to sequester CO 2 at the same time for construction use; (3) create an alternative source thereby reducing the need to transport suitable natural sands or the energy required to produce manufactured aggregates; (4) reduce the amount of leachable metals such as chromium after carbonation; and (5) reduce the amount of free CaO and its associated hydration expansion in service. Several studies have investigated the utilization of carbonated steel slag as SCMs in blended cement (Pan et al, 2015c) and a fine aggregate in concrete (Monkman et al, 2009). After carbonation, the physicochemical properties of steelmaking slag change significantly, thereby affecting the performance of blended cement.…”

Section: Utilization Of Carbonated Product As Supplementary Cementitimentioning

confidence: 99%

Challenges and Perspectives on Carbon Fixation and Utilization Technologies: An Overview

Ping

Pan

Pei

et al. 2016

Aerosol Air Qual. Res.

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This paper provides an overview of state-of-the-art carbon fixation and utilization technologies. Several carbon capture processes, such as chemical absorption and chemical looping, are reviewed and illustrated. In addition, various types of chemicals and fuels that can be produced using concentrated CO 2 (or other forms) through physical, chemical, or enhanced biological methods are presented. Among those carbon conversion methods, two promising approaches, i.e., microalgae ponds and accelerated carbonation using alkaline solid wastes, are reviewed in detail. Microalgae are fast-growing and ubiquitous photosynthetic organisms, which are rich in protein and can be converted to biodiesel fuel. They have been recognized as an alternative feedstock not only because they use CO 2 from the atmosphere but also due to their high lipid content per biomass compared to other plants. In this study, for the microalgae technologies, the principles and applications of open pond systems are discussed in terms of both technological and economic considerations. The important operation parameters affecting productivity of microalgae, including light intensity, temperature, mixing, CO 2 delivery, accumulation of dissolved oxygen, and salinity are summarized. On the other hand, accelerated carbonation technologies are an attractive and feasible approach to integrating alkaline solid waste treatment with CO 2 fixation and utilization. In this study, the performance of various carbonation processes is critically reviewed from the perspectives of process design, energy consumption, and environmental benefits. The carbonated solid product can also be used as supplementary cementitious materials in a blended cement or concrete block. Accordingly, the performance of cement pastes with carbonated product, in terms of workability and strength development, are evaluated from the cement chemistry point of view. Cement manufacturing is an energy and material intensive process, with high annual production. It is noted that, through the accelerated carbonation process, significant indirect environmental benefits can be realized.

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“…Most construction aggregate is used to strengthen composite materials, such as concrete and asphalt concrete, for a myriad of uses ranging from railroad bases to housing foundations. Monkman et al (2009) evaluated the use of carbonated ladle slag as a fine aggregate in zero-slump press-formed compact mortar samples and compared them to similar samples containing control river sand. The 28-day strengths of the mortars made with the carbonated slag sand were comparable to the strengths of the normal river sand mortars (Monkman et al, 2009), which clearly indicates the successful use of carbonated ladle slag as fine aggregates to prepare mortar samples simulating its applications in precast products, such as masonry units, paving stones, and hollow core slabs, which could be further treated by carbonation curing.…”

Section: Aggregate In Concretementioning

confidence: 99%

“…Monkman et al (2009) evaluated the use of carbonated ladle slag as a fine aggregate in zero-slump press-formed compact mortar samples and compared them to similar samples containing control river sand. The 28-day strengths of the mortars made with the carbonated slag sand were comparable to the strengths of the normal river sand mortars (Monkman et al, 2009), which clearly indicates the successful use of carbonated ladle slag as fine aggregates to prepare mortar samples simulating its applications in precast products, such as masonry units, paving stones, and hollow core slabs, which could be further treated by carbonation curing. Moreover, the carbonated particles became coarser due to agglomeration, which should be beneficial for use in aggregate manufacturing (Fernandez Bertos et al, 2004b).…”

Section: Aggregate In Concretementioning

confidence: 99%

An Innovative Approach to Integrated Carbon Mineralization and Waste Utilization: A Review

Pan

Chiang

Chang

et al. 2015

Aerosol Air Qual. Res.

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Carbon dioxide (CO 2 ) emission reduction in industry should be a portfolio option; for example, the carbon capture and utilization by mineralization (CCUM) process is a feasible and proven technology where both CO 2 capture and alkaline waste treatment occur simultaneously through an integrated approach. In this study, the challengeable barriers and significant breakthroughs of CCUM via ex-situ carbonation were reviewed from both theoretical and practical perspectives. Recent progress on the performance of various carbonation processes for different types of alkaline solid wastes was also evaluated based on CO 2 capture capacity and carbonation efficiency. Moreover, several process intensification concepts such as reactor integration and co-utilization with wastewater or brine solution were reviewed and summarized. In addition, the utilization of carbonated products from CCUM as green materials including cement, aggregate and precipitate calcium carbonate were investigated. Furthermore, the current status of worldwide CCUM demonstration projects within the ironand steelmaking industries was illustrated. The energy consumption and cost analyses of CCUM were also evaluated.

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Carbonated Ladle Slag Fines for Carbon Uptake and Sand Substitute

Cited by 55 publications

References 10 publications

Utilization of Industrial Waste Slag as Aggregate in Concrete Applications by Adopting Taguchi’s Approach for Optimization

Utilization of Industrial Waste Slag as Aggregate in Concrete Applications by Adopting Taguchi’s Approach for Optimization

Challenges and Perspectives on Carbon Fixation and Utilization Technologies: An Overview

An Innovative Approach to Integrated Carbon Mineralization and Waste Utilization: A Review

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