A Study on the Phrsical and Mechanical Properties of Concrete with Ferro Copper Slag

Lee, Mun-Hwan; Lee, Sea-Hyun; Song, Tae-Hyeob

doi:10.4334/jkci.2003.15.3.361

Cited by 8 publications

(4 citation statements)

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“…e copper-nickel slag belongs to acid slag, on the basis of the basicity coefficient of copper-nickel, as determined using formula (1) [19]. e formula indicates that the activity coefficient and mass coefficient can be used to reflect the ratio of the active component to the inactive component of the copper-nickel slag.…”

Section: Methodsmentioning

confidence: 99%

Mechanism of Alkali‐Activated Copper‐Nickel Slag Material

Zhang

Jin

Guo

et al. 2020

Advances in Civil Engineering

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A copper-nickel slag-based alkali-activated cementing material (CNSCM) for backfilling was prepared using copper-nickel slag as a raw material and sodium silicate (SS) as an activating agent. The effects of SS content (6%, 8%, and 10%) and curing humidity on the compressive strength of CNSCM were investigated using an electronic universal testing machine. Types of hydration products and microstructures were analyzed by X-ray diffraction, Fourier transform infrared spectroscopy, and scanning electron microscopy. The results indicated that by increasing the SS content, the compressive strength of the CNSCM exhibited an increasing trend, followed by a decreasing trend. The optimal content was 8%. Humidity was identified as another factor affecting compressive strength, which reached 17 MPa after curing for 28 d under standard conditions. A decrease in humidity could improve the compressive strength of the material. The main hydration reaction products of the CNSCM were C-S-H gel, Fe (OH)2 or Fe (OH)3 gel, and CaCO3.

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Section: Methodsmentioning

confidence: 99%

Mechanism of Alkali‐Activated Copper‐Nickel Slag Material

Zhang

Jin

Guo

et al. 2020

Advances in Civil Engineering

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“…AlJabri et al, 2006AlJabri et al, , 2009aAlJabri et al, , 2009bAlJabri et al, , 2011Alnuaimi, 2009;Bahadur and Nayak, 2012;Nagan, 2010, 2011;Brindha and Sureshkumar, 2010;Cachim et al, 2009;Ghosh, 2007;Holcim (Singapore), 2007;Hwang and Laiw, 1989;Ishimaru et al, 2005;Koh and Lye, 2012;Lee et al, 2003;Ling and Thim, 1999;Madany et al, 1991;Meenakashi and Ilangovan, 2011;Nazer et al, 2013;Resende et al, 2008;Shoya et al, 1997Shoya et al, , 1999Shoya et al, , 2003Song et al, 2003;Sudarvizhi and Ilangovan, 2012;Wu et al, 2010a) is that, even though the researchers did not generally comply with the important requirement of maintaining the particle grading when CS/WCS was used as a component of sand, Table 4. A series of trial mixes, using SIBA, RCA and CS/WCS materials the material can be used effectively for making concrete, provided that good concrete design practice is adopted.…”

Section: Strengthmentioning

confidence: 96%

“…Given the chemical and physical nature of CS/WCS, its use as a component of sand at different levels of replacement could hardly be expected to cause any problem with the corrosion of reinforcement in concrete; nevertheless researchers have undertaken some work in this area (Brindha and Nagan, 2011;Lee et al, 2003), as outlined in Table 11. Although somewhat faster corrosion with CS/WCS has been recorded, careful examination of the information of the test mixes suggests that this is most likely to be due to the test mixes with CS/WCS not being properly designed and, consequently, they experienced segregation and bleeding.…”

Section: Corrosion Of Reinforcementmentioning

confidence: 98%

Use of copper slag and washed copper slag as sand in concrete: a state-of-the-art review

Lye

Koh²,

Mangabhai³

et al. 2015

Magazine of Concrete Research

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This paper provides the gist of the systematic review undertaken, involving evaluation, analysis, repackaging and modelling of all the literature that could be sourced on the subject. Copper slag (CS) and washed copper slag (WCS), as to be expected, have essentially similar basic physical (although WCS is usually finer than CS) and chemical characteristics and therefore they can be treated as one material. In-depth analysis of 2192 test data sourced from the literature showed that, given all the basic material characteristics, CS/WCS can be used as the sand component for making all strength grades of concrete and giving similar (or in some aspects better) performance to the corresponding concrete made with natural sand. The special attribute of CS/WCS for lowering the mix water demand has been used by the authors to develop two simple models for utilising the potential water savings and estimating the strength gains that can be realised when designing concrete with CS/WCS for given strength at a specific age. It is demonstrated that the water-saving potential of CS/WCS can be used to make other recycled and secondary materials more acceptable for use in concrete.

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“…In this construction method, small-diameter piles are installed around the columns of the existing facility, and the existing columns are connected to small-diameter piles for supporting superstructures before the excavation of the underground space. The safety of small-diameter piles as a temporary facility in the floating and underground extension method has been evaluated based on construction and measurement cases [17][18][19]. In addition, compared with the general bottom-up and top-down methods, the top-down method using small-diameter piles was more economical as the number of basement floors increased [20].…”

Section: Introductionmentioning

confidence: 99%

Study on Increase in Stability of Floating and Underground Extension Method through Slab Pre-Construction

Kim

Min²,

Kim³

et al. 2021

Sustainability

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The development of underground spaces in urban areas plays a crucial role in the regeneration and sustainability of cities. However, the conventional underground excavation works in metropolises limit the use of the ground facilities owing to stability, noise, and vibration problems, which may cause huge economic damage. In this study, a method of pre-constructing slabs of underground facilities was analyzed to improve the stability of the floating and underground extension method, even during the use of the target building. First, a numerical simulation was conducted to compare the stability of the top-down method with slab pre-construction with that of the conventional top-down method. Then, the stability of the test bed was checked by applying this construction method to the field. As a result, the top-down method with slab pre-construction significantly improved the stability of the target building by preventing the buckling of the columns and supporting members. The increase in the displacement of existing columns and supporting members was controlled after the pre-construction of the slab. In addition, the crack width and ground settlement were stable within the management standards at the field. Thus, this construction method is expected to be crucial in pursuing urban regeneration and sustainability through the efficient development of underground spaces.

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A Study on the Phrsical and Mechanical Properties of Concrete with Ferro Copper Slag

Cited by 8 publications

References 0 publications

Mechanism of Alkali‐Activated Copper‐Nickel Slag Material

Mechanism of Alkali‐Activated Copper‐Nickel Slag Material

Use of copper slag and washed copper slag as sand in concrete: a state-of-the-art review

Study on Increase in Stability of Floating and Underground Extension Method through Slab Pre-Construction

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