Article (Scientific journals)
Gravel wash mud, a quarry waste material as supplementary cementitious material (SCM)
THAPA, Vishojit Bahadur; WALDMANN, Danièle; Simon, Claude
2019In Cement and Concrete Research, 124 (105833)
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Keywords :
Gravel wash mud (GWM); Supplementary cementitious materials; Alternative clay materials; Calcined clays; Pozzolanic activity
Abstract :
[en] The suitability of gravel wash mud (GWM), a sludge waste from gravel quarrying, is examined for its use as a partial Ordinary Portland cement (OPC) clinker substitute. The gravel wash mud was dried, milled into a fine powder and calcined at 750°C, 850°C and 950°C. In this study, various characterisation methods including particle size distribution (PSD), X-ray fluorescence (XRF), X-ray diffraction (XRD) and the simultaneous thermal analysis (STA) were applied on the calcined GWM powders to determine the optimal calcination temperature. Over 200 specimens were prepared based on different cement paste and mortar mixes to investigate the potential of calcined GWM powders as SCMs. The pozzolanic activity of the GWM powders was verified by applying strength-based evaluation methods, simultaneous thermal analysis and SEM on hardened samples. Very promising strength-enhancing capacities were observed for samples containing GWM powders calcined at 850°C with a OPC replacement level of 20 wt.%.
Research center :
University of Luxembourg: Laboratory of Solid Structures
Disciplines :
Civil engineering
Author, co-author :
THAPA, Vishojit Bahadur ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit
WALDMANN, Danièle ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit
Simon, Claude
External co-authors :
no
Language :
English
Title :
Gravel wash mud, a quarry waste material as supplementary cementitious material (SCM)
Publication date :
October 2019
Journal title :
Cement and Concrete Research
ISSN :
0008-8846
Publisher :
Elsevier, Oxford, United Kingdom
Volume :
124
Issue :
105833
Peer reviewed :
Peer Reviewed verified by ORBi
Focus Area :
Sustainable Development
Name of the research project :
CO2REDCEM
Available on ORBilu :
since 29 July 2019

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