Reactivity of Ground Coal Bottom Ash to Be Used in Portland Cement

Esperanza Menéndez, Cristina Argiz and Miguel Ángel Sanjuán
Additional contact information
Esperanza Menéndez: The Eduardo Torroja Institute for Construction Science (Spanish National Research Council, CSIC), C/Serrano Galvache, 4, 28033 Madrid, Spain
Cristina Argiz: Civil Engineering School, Technical University of Madrid, C/Profesor Aranguren, 3, Ciudad Universitaria, 28040 Madrid, Spain
Miguel Ángel Sanjuán: Spanish Institute of Cement and its Applications (IECA), C/José Abascal, 53, 28003 Madrid, Spain

J, 2021, vol. 4, issue 3, 1-10

Abstract: Ground coal bottom ash is considered a novel material when used in common cement production as a blended cement. This new application must be evaluated by means of the study of its pozzolanic properties. Coal bottom ash, in some countries, is being used as a replacement for natural sand, but in some others, it is disposed of in a landfill, leading thus to environmental problems. The pozzolanic properties of ground coal bottom ash and coal fly ash cements were investigated in order to assess their pozzolanic performance. Proportions of coal fly ash and ground coal bottom ash in the mixes were 100:0, 90:10, 80:20, 50:50, 0:100. Next, multicomponent cements were formulated using 10%, 25% or 35% of ashes. In general, the pozzolanic performance of the ground coal bottom ash is quite similar to that of the coal fly ash. As expected, the pozzolanic reaction of both of them proceeds slowly at early ages, but the reaction rate increases over time. Ground coal bottom ash is a promising novel material with pozzolanic properties which are comparable to that of coal fly ashes. Then, coal bottom ash subjected to an adequate mechanical grinding is suitable to be used to produce common coal-ash cements.

Keywords: coal bottom ash; coal fly ash; circular economy; pozzolanicity; coal-ash cement (search for similar items in EconPapers)
JEL-codes: I1 I10 I12 I13 I14 I18 I19 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2571-8800/4/3/18/pdf (application/pdf)
https://www.mdpi.com/2571-8800/4/3/18/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jjopen:v:4:y:2021:i:3:p:18-232:d:580186

Access Statistics for this article

J is currently edited by Ms. Angelia Su

More articles in J from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().