Reactivity of Ground Coal Bottom Ash to Be Used in Portland Cement
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...
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| Format: | Article |
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MDPI AG
2021-06-01
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| Series: | J |
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| Online Access: | https://www.mdpi.com/2571-8800/4/3/18 |
| _version_ | 1797529157170626560 |
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| author | Esperanza Menéndez Cristina Argiz Miguel Ángel Sanjuán |
| author_facet | Esperanza Menéndez Cristina Argiz Miguel Ángel Sanjuán |
| author_sort | Esperanza Menéndez |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-10T10:09:45Z |
| format | Article |
| id | doaj.art-6d8f67b6046a425ba17894ba92d35aa0 |
| institution | Directory Open Access Journal |
| issn | 2571-8800 |
| language | English |
| last_indexed | 2024-03-10T10:09:45Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | J |
| spelling | doaj.art-6d8f67b6046a425ba17894ba92d35aa02023-11-22T01:18:42ZengMDPI AGJ2571-88002021-06-014322323210.3390/j4030018Reactivity of Ground Coal Bottom Ash to Be Used in Portland CementEsperanza Menéndez0Cristina Argiz1Miguel Ángel Sanjuán2The Eduardo Torroja Institute for Construction Science (Spanish National Research Council, CSIC), C/Serrano Galvache, 4, 28033 Madrid, SpainCivil Engineering School, Technical University of Madrid, C/Profesor Aranguren, 3, Ciudad Universitaria, 28040 Madrid, SpainSpanish Institute of Cement and its Applications (IECA), C/José Abascal, 53, 28003 Madrid, SpainGround 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.https://www.mdpi.com/2571-8800/4/3/18coal bottom ashcoal fly ashcircular economypozzolanicitycoal-ash cement |
| spellingShingle | Esperanza Menéndez Cristina Argiz Miguel Ángel Sanjuán Reactivity of Ground Coal Bottom Ash to Be Used in Portland Cement J coal bottom ash coal fly ash circular economy pozzolanicity coal-ash cement |
| title | Reactivity of Ground Coal Bottom Ash to Be Used in Portland Cement |
| title_full | Reactivity of Ground Coal Bottom Ash to Be Used in Portland Cement |
| title_fullStr | Reactivity of Ground Coal Bottom Ash to Be Used in Portland Cement |
| title_full_unstemmed | Reactivity of Ground Coal Bottom Ash to Be Used in Portland Cement |
| title_short | Reactivity of Ground Coal Bottom Ash to Be Used in Portland Cement |
| title_sort | reactivity of ground coal bottom ash to be used in portland cement |
| topic | coal bottom ash coal fly ash circular economy pozzolanicity coal-ash cement |
| url | https://www.mdpi.com/2571-8800/4/3/18 |
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