Effect of Ferronickel Slag Powder on Strength of Soil in Marine Environment

Over the past few years, soil-cement has been widely used in marine geotechnical engineering; meanwhile, the safety of soil-cement in marine environment has attracted wide attention. In order to study the influence of composite ferronickel slag powder on the strength and micro morphology of soil-cement in marine environment, the composite nickel iron slag powder was added into the soil-cement in this paper. The unconfined compressive strength test, erosion resistance coefficient analysis, SEM, and EDS test analysis of soil-cement were carried out.. Results showed that the marine environment had great influences on the strength of soil-cement, and the addition of compound nickel-iron slag powder can enhance the strength of soil-cement, and the deterioration of the strength of soil-cement is reduced. In addition, the compound ferronickel slag powder has microaggregate effect, morphological effect, and activation effect, which not only improves compaction rate of soil-cement and prevents invasion of erosive ions in marine environment but also has positive effects on the performance of soil-cement.

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Experimental study on the strength of soil-cement with additions of mineral powder and ferronickel slag powder

International Journal of Mining and Mineral Engineering ◽

10.1504/ijmme.2020.109632 ◽

2020 ◽

Vol 11 (3) ◽

pp. 218 ◽

Cited By ~ 1

Author(s):

Feng Chen ◽

Shenghao Tong

Keyword(s):

Experimental Study ◽

Slag Powder ◽

Soil Cement ◽

Ferronickel Slag ◽

Mineral Powder

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Experimental study on the strength of soil-cement with additions of mineral powder and ferronickel slag powder

International Journal of Mining and Mineral Engineering ◽

10.1504/ijmme.2020.10031912 ◽

2020 ◽

Vol 11 (3) ◽

pp. 218

Author(s):

Feng Chen ◽

Shenghao Tong

Keyword(s):

Experimental Study ◽

Slag Powder ◽

Soil Cement ◽

Ferronickel Slag ◽

Mineral Powder

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Effect of Fly Ash on Compressive Strength, Drying Shrinkage, and Carbonation Depth of Mortar with Ferronickel-Slag Powder

Applied Sciences ◽

10.3390/app11031037 ◽

2021 ◽

Vol 11 (3) ◽

pp. 1037

Author(s):

Se-Jin Choi ◽

Ji-Hwan Kim ◽

Sung-Ho Bae ◽

Tae-Gue Oh

Keyword(s):

Compressive Strength ◽

Fly Ash ◽

Construction Industry ◽

Bituminous Coal ◽

Raw Materials ◽

Drying Shrinkage ◽

The Other ◽

Test Results ◽

Slag Powder ◽

Ferronickel Slag

In recent years, efforts to reduce greenhouse gas emissions have continued worldwide. In the construction industry, a large amount of CO2 is generated during the production of Portland cement, and various studies are being conducted to reduce the amount of cement and enable the use of cement substitutes. Ferronickel slag is a by-product generated by melting materials such as nickel ore and bituminous coal, which are used as raw materials to produce ferronickel at high temperatures. In this study, we investigated the fluidity, microhydration heat, compressive strength, drying shrinkage, and carbonation characteristics of a ternary cement mortar including ferronickel-slag powder and fly ash. According to the test results, the microhydration heat of the FA20FN00 sample was slightly higher than that of the FA00FN20 sample. The 28-day compressive strength of the FA20FN00 mix was approximately 39.6 MPa, which was higher than that of the other samples, whereas the compressive strength of the FA05FN15 mix including 15% of ferronickel-slag powder was approximately 11.6% lower than that of the FA20FN00 mix. The drying shrinkage of the FA20FN00 sample without ferronickel-slag powder was the highest after 56 days, whereas the FA00FN20 sample without fly ash showed the lowest shrinkage compared to the other mixes.

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The Growth Characteristics and Kinetics of Metallic Iron in Coal-Based Reduction of Jinchuan Ferronickel Slag

Minerals ◽

10.3390/min11080876 ◽

2021 ◽

Vol 11 (8) ◽

pp. 876

Author(s):

Jianwen Yu ◽

Yonghong Qin ◽

Peng Gao ◽

Yongsheng Sun ◽

Songbo Ma

Keyword(s):

Metallic Iron ◽

Steel Slag ◽

Reduction Process ◽

Growth Period ◽

Metallic Phase ◽

Growth Characteristics ◽

Industry Waste ◽

Iron Slag ◽

Ferronickel Slag ◽

Kinetics Of

As the fourth-largest industry waste residue, after iron slag, steel slag, and red mud, in China, the comprehensive utilization of nickel slag is imminent. Coal-based reduction combined with magnetic separation was considered an efficient method to extract iron from nickel slag. During the coal-based reduction of Jinchuan ferronickel slag, the growth characteristics and kinetics of metallic iron were investigated in this paper. The metallisation rate and metal iron grain size gradually increased with the reduction temperature or the reaction time, and the coal-based reduction process was divided into the rapid formation period and the aggregation growth period of the metallic phase. The granularity distribution of metallic iron obeyed the Doseresp sigmoidal function, and the activation energy of grain growth at different stages were 52.482 ± 4.448 kJ·mol−1 and 26.426 ± 3.295 kJ·mol−1, respectively. Meanwhile, a mathematical growth model of the metallic iron grains was also established.

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