Advanced search
1 file | 3.88 MB

Influence of intensive vacuum mixing and heat treatment on compressive strength and microstructure of reactive powder concrete incorporating secondary copper slag as supplementary cementitious material

Romy Suryaningrat Edwin (UGent), Elke Gruyaert (UGent) and Nele De Belie (UGent)
Author
Organization
Abstract
In this study the effect of vacuum mixing and heat treatment on the compressive strength and microstructure of reactive powder concrete (RPC), made with secondary copper slag as partial cement replacement is investigated. The quickly cooled granulated copper slag was ground using a planetary ball mill. A low water-to-binder ratio of 0.185 was chosen. The series of concrete mixtures and cement paste samples were produced with copper slag contents from 0 to 20 wt%. The pozzolanic activity of slag was determined by the Frattini test. The performance of RPC mixed under vacuum conditions and heat-cured was compared to that of RPC mixed at atmospheric pressure without heat treatment. The porosity evolution of RPC was investigated by mercury intrusion porosimetry. A higher workability of the fresh RPC was obtained by mixing under atmospheric pressure. The presence of copper slag in the RPC had no adverse effect on compressive strength for all treatments. The heat treatment decreases the porosity and enhances the RPC strength. Assessment of the pozzolanic activity by means of the Frattini test indicates low pozzolanic reaction of the slag after 15 days. The presence of slag in the paste tends to decrease the total heat production of the paste. The use of copper slag as cement replacement in the RPC production decreases the energy consumption and reduces the carbon footprint. (C) 2017 Elsevier Ltd. All rights reserved.
Keywords
HIGH-PERFORMANCE CONCRETE, BLAST-FURNACE SLAG, MECHANICAL-PROPERTIES, FINE AGGREGATE, COARSE AGGREGATE, BYPASS DUST, TEMPERATURE, HYDRATION, PRESSURE, WASTE, Copper slag, Reactive powder concrete, Compressive strength, Vacuum, mixing-heat treatment, Porosity, Pozzolanic activity

Downloads

    • full text
    • |
    • UGent only
    • |
    • PDF
    • |
    • 3.88 MB

Citation

Please use this url to cite or link to this publication:

Chicago
Edwin, Romy Suryaningrat, Elke Gruyaert, and Nele De Belie. 2017. “Influence of Intensive Vacuum Mixing and Heat Treatment on Compressive Strength and Microstructure of Reactive Powder Concrete Incorporating Secondary Copper Slag as Supplementary Cementitious Material.” Construction and Building Materials 155: 400–412.
APA
Edwin, R. S., Gruyaert, E., & De Belie, N. (2017). Influence of intensive vacuum mixing and heat treatment on compressive strength and microstructure of reactive powder concrete incorporating secondary copper slag as supplementary cementitious material. CONSTRUCTION AND BUILDING MATERIALS, 155, 400–412.
Vancouver
1.
Edwin RS, Gruyaert E, De Belie N. Influence of intensive vacuum mixing and heat treatment on compressive strength and microstructure of reactive powder concrete incorporating secondary copper slag as supplementary cementitious material. CONSTRUCTION AND BUILDING MATERIALS. Oxford: Elsevier Sci Ltd; 2017;155:400–12.
MLA
Edwin, Romy Suryaningrat, Elke Gruyaert, and Nele De Belie. “Influence of Intensive Vacuum Mixing and Heat Treatment on Compressive Strength and Microstructure of Reactive Powder Concrete Incorporating Secondary Copper Slag as Supplementary Cementitious Material.” CONSTRUCTION AND BUILDING MATERIALS 155 (2017): 400–412. Print.
@article{8557536,
  abstract     = {In this study the effect of vacuum mixing and heat treatment on the compressive strength and microstructure of reactive powder concrete (RPC), made with secondary copper slag as partial cement replacement is investigated. The quickly cooled granulated copper slag was ground using a planetary ball mill. A low water-to-binder ratio of 0.185 was chosen. The series of concrete mixtures and cement paste samples were produced with copper slag contents from 0 to 20 wt\%. The pozzolanic activity of slag was determined by the Frattini test. The performance of RPC mixed under vacuum conditions and heat-cured was compared to that of RPC mixed at atmospheric pressure without heat treatment. The porosity evolution of RPC was investigated by mercury intrusion porosimetry. A higher workability of the fresh RPC was obtained by mixing under atmospheric pressure. The presence of copper slag in the RPC had no adverse effect on compressive strength for all treatments. The heat treatment decreases the porosity and enhances the RPC strength. Assessment of the pozzolanic activity by means of the Frattini test indicates low pozzolanic reaction of the slag after 15 days. The presence of slag in the paste tends to decrease the total heat production of the paste. The use of copper slag as cement replacement in the RPC production decreases the energy consumption and reduces the carbon footprint. (C) 2017 Elsevier Ltd. All rights reserved.},
  author       = {Edwin, Romy Suryaningrat and Gruyaert, Elke and De Belie, Nele},
  issn         = {0950-0618},
  journal      = {CONSTRUCTION AND BUILDING MATERIALS},
  keyword      = {HIGH-PERFORMANCE CONCRETE,BLAST-FURNACE SLAG,MECHANICAL-PROPERTIES,FINE AGGREGATE,COARSE AGGREGATE,BYPASS DUST,TEMPERATURE,HYDRATION,PRESSURE,WASTE,Copper slag,Reactive powder concrete,Compressive strength,Vacuum,mixing-heat treatment,Porosity,Pozzolanic activity},
  language     = {eng},
  pages        = {400--412},
  publisher    = {Elsevier Sci Ltd},
  title        = {Influence of intensive vacuum mixing and heat treatment on compressive strength and microstructure of reactive powder concrete incorporating secondary copper slag as supplementary cementitious material},
  url          = {http://dx.doi.org/10.1016/j.conbuildmat.2017.08.036},
  volume       = {155},
  year         = {2017},
}

Altmetric
View in Altmetric
Web of Science
Times cited: