Recycling of silicomanganese slag as pozzolanic material in Portland cements: Basic and engineering properties

Frı́as, Moisés; Rojas, M.I. Sánchez de; Santamarı́a, Jesús; Rodríguez, Celestino

doi:10.1016/j.cemconres.2005.06.014

Cited by 81 publications

(41 citation statements)

References 4 publications

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“…Hence, there is a need to diversify the sources and the supply of pozzolanic mineral additives for use in the manufacture of cements and related materials. The evaluation of industrial wastes and byproducts form the main plank of these investigations, thanks to which pozzolanic fractions are now specified in a range of cement standards [1][2][3][4][5]. Thus, a central research topic, core to numerous investigations [6][7][8][9][10][11][12], concerns the activation of clayey materials, principally in the form of kaolinite (K), from which metakaolin (MK) is generated by the controlled activation of natural kaolinite.…”

Section: Introductionmentioning

confidence: 99%

Coal-Mining Tailings as a Pozzolanic Material in Cements Industry

et al. 2018

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Abstract:The generation of enormous volumes of mine-tailing waste is standard practice in the mining industry. Large quantities of these tailings are also sources of kaolinite-rich materials that accumulate in slag heaps, causing significant environmental degradation and visual impacts on the landscape. The consequences of coal refuse dumped in slagheaps calls for the study of eco-innovative solutions and the assessment of waste types. Moreover, the environmental benefits of reusing large amounts of contaminated waste are also evident. Hence, the objective of this investigation is to expand current knowledge of new siliceous-aluminium minerals and their pozzolanic activity. Four raw tailing samples are characterized to determine their chemical (by ICP/MS analysis), morphological (by SEM/EDX analysis), and mineralogical (by XRD analysis) compositions prior to their thermal activation that transforms the inert wastes at various temperatures into materials with cementitious properties. The results of XRD analysis following activation confirmed that the kaolinite content is fully transformed into metakaolinite. The coal refuse samples presented sufficiently reliable levels of pozzolanic activity for use as additives in industrial cements.

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Section: Introductionmentioning

confidence: 99%

Coal-Mining Tailings as a Pozzolanic Material in Cements Industry

et al. 2018

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“…The Cl -content in the reinforced concrete was required to be lower than 0.024%, meaning the FA is inapplicable to reinforced concrete. According to the XRD crystalline phase spectrum, the CaSO 3 and CaO of FA had high peak strength, followed by AlPO 4 and Ca(OH) 2 . The incinerated ash pH was 10.21, and was alkaline.…”

Section: Methodology Experimental Materialsmentioning

confidence: 99%

“…The chemical composition of FA ( 2 ) to the food processing sludge-derived fuel. The CaO in FA was much lower than Portland cement, meaning the activity of FA was lower than cement.…”

Section: Methodology Experimental Materialsmentioning

confidence: 99%

“…A great variety of pozzolanic materials is used extensively, such as blast furnace slag [1], silicomanganese slag [2], pulp sludge incinerated ash [3], sugarcane incinerated ash [4], palm oil fuel incinerated ash , rice husk ash [5,6], waste glass, ceramics, metakaolin, swelling clay [7][8][9], cattle manure incinerated ash, coal ash [10], semiconductor industry sludge [11], and TFT-LCD waste glass [12]. Some studies have used industrial wastes, such as soda-lime glass [13], industrial sludge, ocean sludge, fly ash [14][15][16], waste glass, recycled concrete aggregate and slag, to make artificial aggregate and lightweight aggregate [17,18].…”

Section: Introductionmentioning

confidence: 99%

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Reuse Resource of Food Processing Sludge-Derived Fuel Incinerated Ash

Chiou¹,

Su²

2015

Int J Waste Resour

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The heat value of food processing sludge is similar to that of bituminous coal, thus is suitable as biofuel; however, the problem of incinerated ash disposal after combustion should be address. This study evaluated the applicability of food processing sludge-derived fuel incinerated ash (FA) to pozzolanic material and soil improvement, and proposed reuse strategies. When applied to pozzolanic material, the addition of FA reduced the hydration heat of fresh incinerated ash cement paste (FACP) significantly (85.96~91.23%), and prolonged the initial setting times (87.88~134.85%) and final setting times (87.88~134.85%) of FACP significantly. When the FA addition was 10% and 20% respectively, the pozzolanic strength activity index (SAI) was greater than 75% until the hardened FACP was cured for 28 days and 90 days respectively. When applied in soil improvement, the final seed germination of Chinese cabbage and water spinach in the original soil (ash content 0%) and improved soil (ash content 20%) was 98% and 90% respectively. There was no significant effect on the growth rate of Chinese cabbage and water spinach. Reuse Resource of Food Processing Sludge-Derived Fuel Incinerated Ash

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“…Si-Mn slag has similar chemical composition with blast furnace slag and it was confirmed that the Si-Mn slag had pozzolanic and latent hydraulic properties, thus most researchers focused on using the slag as blending material in cements in recent years [1][2][3][4][5][6]. Nath et al [2] studied that the air-cooled Si-Mn slag was a supplementary cementing material and the process of mechanical activation or raising Blaine fineness can strengthen hydraulic properties.…”

Section: Introductionmentioning

confidence: 99%

Recycling of Si-Mn Slag in the Preparation of Unburned Water Permeable Bricks

Shao¹,

Ma²,

Liu³

et al. 2017

dteees

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Abstract. This paper studies the feasibility of preparing unburned water permeable bricks with water-quenched silico-manganese (Si-Mn) slag as main aggregate and cement as adhesive. In this study, the characteristics of the Si-Mn slag were detected to recycle it efficiently, and five factors and four levels orthogonal table L 16 (4 5 ) was used to study the main factors on performances of the bricks and obtain optimum process parameters. The results show that the Si-Mn slag is porous and gray-green. It is of small particle size, high levels of SiO 2 -Al 2 O 3 -CaO, and it mainly contains glassy phase and less crystalline phases which make it has hydraulic and pozzolanic characteristics and good compatibility with cement. The main influence factor of the permeability and compressive strength are superplasticizer content and water-cement ratio. And the permeability and compressive strength of colorful double-layer permeable bricks with thickness of 5mm can be 1.08 × 10 -2 cm/s and 33.15 MPa.

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Recycling of silicomanganese slag as pozzolanic material in Portland cements: Basic and engineering properties

Cited by 81 publications

References 4 publications

Coal-Mining Tailings as a Pozzolanic Material in Cements Industry

Coal-Mining Tailings as a Pozzolanic Material in Cements Industry

Reuse Resource of Food Processing Sludge-Derived Fuel Incinerated Ash

Recycling of Si-Mn Slag in the Preparation of Unburned Water Permeable Bricks

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