Study on effect of mixing condition on strength of mixture of dredged soil and steel slag

Hirai, Shoji; Mizutani, Taka Aki; Kikuchi, Yoshihiro; Nakashima, Shohei; Iguchi, Keiji

doi:10.1201/b12754-42

Cited by 3 publications

(3 citation statements)

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“…The results of the present study have indicated that negative impacts due to nutrient release from the artificial basal media were negligible at any mixing ratios. While Nishijima et al (2015) reported that an increase in DM content enhanced the growth of eelgrass, it is known that the addition of slag consolidates DM and improves its physical properties for use as a basal medium (Chan et al 2011;Hirai et al 2012;Malasavage et al 2012;Yano et al 2016). Therefore, the appropriate ratio for practical use of slag should be determined based on site-specific, topographic and tidal conditions.…”

Section: Discussionmentioning

confidence: 96%

“…However, unconsolidated DM substrates are easily eroded due to limited strength and a high water content (Kaldy et al 2004). The use of steelmaking slag has been proposed to consolidate DM and improve its physical properties for use as a basal medium (Chan et al 2011;Hirai et al 2012;Malasavage et al 2012;Yano et al, 2016). Slag is an industrial by-product of steelmaking operations.…”

Section: Introductionmentioning

confidence: 99%

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Nutrient dynamics in core sediments of an artificial basal medium prepared with steelmaking slag and dredged materials

et al. 2016

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Section: Discussionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Nutrient dynamics in core sediments of an artificial basal medium prepared with steelmaking slag and dredged materials

et al. 2016

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“…Steel slag is a lower cost solidification material than cement, and its effects have been studied [1][2][3][4]. It has been increasingly used in civil engineering in Japan for uses including road subgrade material and asphalt concrete aggregate [5][6][7][8]. Steel slag is generated during the process of steel manufacturing and is often an industrial waste.…”

Section: Introductionmentioning

confidence: 99%

Seepage Behavior Within Embankment Constructed of Mixed Soil with Steel Slag

Kawai

Arinishi

Kataoka

et al. 2021

Lecture Notes in Civil Engineering

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Steel slag is a lower cost solidification material than cement, and its use on geotechnical engineering sites is increasing. However, steel slag is an industrial waste containing a lot of calcium. Since most earth structures are exposed to natural weather conditions, it is a concern that chemical material may leach from the earth structure due to external water head fluctuation. Methods of constructing and maintaining embankment containing chemical materials without leaching are required for the effective use of steel slag. In this study, an embankment model test using steel slag mixed soil was conducted, and rainfall infiltration behavior and alkaline component leachate from the embankment were monitored. Moreover, electric prospecting was concurrently conducted. Consequently, it was found that rainfall infiltration behavior strongly depends on the rainfall pattern, which subsequently influences alkaline leaching. This behavior shows good agreement with results obtained from rainfall infiltration simulation.

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Effect of amorphous silica content in clay on mechanical properties of the mixture of clay and converter steelmaking slag

Kakihara

Kikuchi

Noda

et al. 2020

JGS Special Publication

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A mixture of dredged soil and steelmaking slag solidifies owing to the pozzolanic reaction between the silica and alumina in the dredged soil and the calcium in the steelmaking slag. Previous studies have reported that, for the same steelmaking slag, the concentration of dissolved silica and the shear strength of a mixture of dredged soil and steelmaking slag increases as the content of amorphous silica in the clay increases. However, the relationship between factors that affect solidification strength, such as the ratio of amorphous silica content and the humic acid content, and the solidification strength of a mixture of clayey soil and steelmaking slag has not been clarified. In this study, focusing on the ratio of amorphous silica contents in clay, clays containing different ratios of amorphous silica content were prepared by mixing kaolin clay and metakaolin. The unconfined compressive strengthｓ of the clay mixed with steelmaking slag were measured. For the same curing time and up to an amorphous silica content ratio of 15%, the strength increases with an increase in the ratio. In addition, the shear strength develops earlier for higher content ratios of amorphous silica. Compared with studies on dredged soils mixed with steelmaking slag, the amorphous silica content ratio of the clay in this study was higher than that of dredged soils. However, the shear strength in the dredged soil with amorphous silica from diatoms and minerals mixed with steelmaking slag developed earlier than that of the clay with amorphous silica from minerals mixed with steelmaking slag. The differences in the development of shear strength can be attributed to the difference of the amorphous silica from minerals or that from diatoms.

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Study on effect of mixing condition on strength of mixture of dredged soil and steel slag

Cited by 3 publications

References 0 publications

Nutrient dynamics in core sediments of an artificial basal medium prepared with steelmaking slag and dredged materials

Nutrient dynamics in core sediments of an artificial basal medium prepared with steelmaking slag and dredged materials

Seepage Behavior Within Embankment Constructed of Mixed Soil with Steel Slag

Effect of amorphous silica content in clay on mechanical properties of the mixture of clay and converter steelmaking slag

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