Hydro-thermal reaction according to the CaO/SiO2 mole-ratio in silico-manganese slag

Choi, Sunmi; Kim, Jin-Man; Oh, Sangyoon; Han, Di

doi:10.1007/s10163-015-0431-6

Cited by 13 publications

(5 citation statements)

References 9 publications

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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: 98%

“…The main hydraulic reaction product was C-S-H (C = CaO, S = SiO 2 , H = H 2 O) in the structure which was the key to improve the strength and durability of concrete [2,5]. Sunmi Choi et al [6] investigated the influence of CaO/SiO 2 mole-ratio on hydro-thermal reaction. It indicated that cement of the greatest strength developed under the condition of CaO/SiO 2 at a mole-ratio of 1.0.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Introductionmentioning

confidence: 98%

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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“…Therefore, ferromanganese slag is a slag with high CaO content. In China, ferromanganese slag has a higher content of CaO as the grade of manganese ore is lower than that of the average for the rest of the world [4,5]. According to statistics, the annual emissions of ferromanganese slag in China were about 18 million tons in 2017, the majority of the ferromanganese slag ended up in landfill [6,7].…”

Section: Introductionmentioning

confidence: 99%

Structure and Crystallization of High-Calcium, CMAS Glass Ceramics Synthesized with a High Content of Slag

et al. 2022

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In this work, more than 70 wt % of ferromanganese slag (containing 40 wt % CaO) was used to synthesize high-calcium, CaO-MgO-Al2O3-SiO2 (CMAS) glass ceramics. The effect of SiO2/CaO on the structure, crystallization behavior and microstructure of high-calcium, CMAS, slag glass ceramics was studied by IR, NMR, DSC, XRD and SEM. The results showed that in the high-calcium, CMAS glass ceramics, the main existing forms of silicon–oxygen tetrahedra (Qn) were Q0 and Q1. With the increase in the SiO2/CaO, Qn changed from Q0 and Q1 (main units) to Q1 (main units) and Q2, and then to Q1 and Q2 (main units). The polymerization degree of Qn changed from low to high, making the glass more stable, which led to the increase in crystallization temperature and the decrease in crystallization kinetic constant (k) and frequency factor (υ). At the same time, the change in the Qn structure resulted in a gradual change to the main crystal, from akermanite to diopside–wollastonite.

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“…It contains a lot of Si-based oxide and a little Fe-based oxide. Frias et al [30] identified a fine SiMn slag powder suitable for use as aggregate in concrete, which improves volumetric and thermal stability when used as a cement admixture [31,32]. The molten SiMn slag induces water evaporation when it comes into contact with water due to its high thermal temperature, which created small pores on the inner layer of the slag and large pores on the outer slag layer as the cooling process progressed.…”

Section: Introductionmentioning

confidence: 99%

Effect of Chemical Treatment on Silicon Manganese: Its Morphological, Elemental and Spectral Properties and Its Usage in Concrete

Yun

Bakri

Rahman

et al. 2022

Silicon

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The effect of chemical treatment on silicon manganese slag and the effect of curing time on the compressive strength of completely replacement coarse aggregate silicon manganese concrete (SMC) relative to normal weight concrete (NWC) with gravel as coarse aggregate is the subject of this paper. Alkali and acidic base chemicals are used to alter the neat silicon manganese slag during chemical preparation. The mixture pattern proportions for Grade 30 and Grade 50, respectively, were used to create the concrete. Before the compressive strength tests, the samples were cast and cured for 7-, 14-, and 28-days. The properties of the silicon manganese slag and its concrete were studied using a scanning electron microscope (SEM), energy dispersive x-ray spectroscopy (EDS), and Fourier transform infrared spectroscopy (FTIR). The compressive strength of SMC30 and SMC50 obtained were 37.3 MPa and 51.1 MPa, respectively, on the 28-day. The alkaline treatment smoothest the matrix, while the acid treatment roughens the composition of the silicon manganese slag, according to SEM. The functional group demonstrated a major improvement in FTIR, while EDS revealed a high content of both silicon (Si) and manganese (Mn) elements. As a result, it can be observed that the power of SMC increases as the curing time increases for samples with complete replacement of normal aggregates using silicon slag.

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Hydro-thermal reaction according to the CaO/SiO2 mole-ratio in silico-manganese slag

Cited by 13 publications

References 9 publications

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

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

Structure and Crystallization of High-Calcium, CMAS Glass Ceramics Synthesized with a High Content of Slag

Effect of Chemical Treatment on Silicon Manganese: Its Morphological, Elemental and Spectral Properties and Its Usage in Concrete

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