Blasted copper slag as fine aggregate in Portland cement concrete

Anjos, M.A.G. dos; Sales, Ângela Teresa Costa; Andrade, Neivi

doi:10.1016/j.jenvman.2017.03.032

Cited by 74 publications

(23 citation statements)

References 5 publications

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“…Dirty FRAP without washing was found to meet the IDOT compressive strength requirements up to 50% replacement. Reference [7] studied on the potential of blasted copper slag as fine aggregate in Portland cement concrete. The greatest reductions of compressive strength were found when the replacement was over 40%.…”

Section: Literature Reviewmentioning

confidence: 99%

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Effect of Copper Slag and Granite Powder on the Mechanical Properties of Reclaimed Asphalt Pavement Aggregate Concrete

Mahitha¹,

Aswini²

2018

IJSCET

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The replacement of natural gravel aggregate with reclaimed asphalt as coarse aggregate would help in reduction of environmental and ecological effects. Researches were rarely performed by replacing fine aggregate in reclaimed asphalt pavement aggregate concrete. This project aims to investigate the feasibility of improving the strength of recycled asphalt aggregate concrete in which recycled asphalt aggregate is used as a partial replacement of coarse aggregate at 30%. Abrasion and attrition technique is used to modify or roughen the surface of RAP aggregates. Granite powder and copper slag are used as a partial replacement of sand at 5, 10, 15, 20 and 25% in Abrasion and attrition Treated Reclaimed Asphalt Pavement Aggregate Concrete (ABTRAPC). Thirty cubes, twenty cylinders and twenty beams of concrete with granite powder and thirty cubes, twenty cylinders and ten beams of concrete with copper slag were made and tested. The 7 th and 28 th day strengths were found out at these replacements. It was observed that the compressive strength, split tensile strength and flexural strength was found to be maximum at 15% replacement of sand by copper slag. The compressive strength was increased about 29.8% compared to ABTRAPC. Flexural strength similar to normal concrete and about 12.8% greater compared to ABTRAP concrete. The compressive strength and flexural strength was also increased to a maximum at 15% replacement of sand by granite powder and split tensile strength at 20% replacement of granite powder. The results showed that the potential of reclaimed asphalt aggregates as a partial replacement of coarse aggregates in concrete could be effectively enhanced with its a combination with granite powder or copper slag. The increase in compressive strength values and the increase in flexural strength values similar to normal concrete proved that this concrete has its potential to be used in pavement applications.

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Section: Literature Reviewmentioning

confidence: 99%

“…6. At 15% replacement of fine aggregate with granite powder, a flexural strength of 6.12 MPa is obtained which shows a reduction of 9.3% compared to abrasion treated RAP aggregates (6.75 MPa) at 28 days 7…”

mentioning

confidence: 96%

Effect of Copper Slag and Granite Powder on the Mechanical Properties of Reclaimed Asphalt Pavement Aggregate Concrete

Mahitha¹,

Aswini²

2018

IJSCET

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“…However, higher substitutions did not show promising results. DOS ANJOS et al [21] incorporated 20, 40, 60, 80 and 100% of copper slag as aggregates in substitution of sand in the cementitious matrix and verified 5 to 15% loss of mechanical strength with the presence of copper slag in the concrete.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of coppe slag as aggregate addition on properties of cementitious matrix

et al. 2020

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“…Recently, many researchers have published studies on the utilization of copper slag, for example, as a cement additive [12], for preparing abrasive tools [13], for pavement materials [14], and for preparing glasses [15]. These processes could utilize the copper slag at low cost.…”

Section: Introductionmentioning

confidence: 99%

Recovery of Iron from Copper Slag Using Coal-Based Direct Reduction: Reduction Characteristics and Kinetics

Zhang

Gao

et al. 2020

Minerals

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The Fe3O4 and Fe2SiO4 in copper slag were successfully reduced to metallic iron by coal-based direct reduction. Under the best reduction conditions of 1300 °C reduction temperature, 30 min reduction time, 35 wt.% coal dosage, and 20 wt.% CaO dosage (0.75 binary basicity), the Fe grade of obtained iron concentration achieved 91.55%, and the Fe recovery was 98.13%. The kinetic studies on reduction indicated that the reduction of copper slag was controlled by the interfacial reaction and carbon gasification at 1050 °C. When at a higher reduction temperature, the copper slag reduction was controlled by the diffusion of the gas. The integral kinetics model research illustrated that the reaction activation energy increased as the reduction of copper slag proceeded. The early reduction of Fe3O4 needed a low reaction activation energy. The subsequent reduction of Fe2SiO4 needed higher reaction activation energy compared with that of Fe3O4 reduction.

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Blasted copper slag as fine aggregate in Portland cement concrete

Cited by 74 publications

References 5 publications

Effect of Copper Slag and Granite Powder on the Mechanical Properties of Reclaimed Asphalt Pavement Aggregate Concrete

Effect of Copper Slag and Granite Powder on the Mechanical Properties of Reclaimed Asphalt Pavement Aggregate Concrete

Evaluation of coppe slag as aggregate addition on properties of cementitious matrix

Recovery of Iron from Copper Slag Using Coal-Based Direct Reduction: Reduction Characteristics and Kinetics

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