Influence of Hydrated Lime on the Self-Healing Capacity of Cement Mortars
The capacity of hydrated lime to reabsorb CO2 as it hardens has made it a desirable replacement for cement to produce mortars with an overall lower environmental footprint. Still, research into lime-cement formulations remains limited, especially when it comes to their self-healing capacity. Some st...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2023-01-01
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| Series: | MATEC Web of Conferences |
| Online Access: | https://www.matec-conferences.org/articles/matecconf/pdf/2023/05/matecconf_smartincs2023_02021.pdf |
| _version_ | 1827955675722940416 |
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| author | Giordano Franco Grosso Boon Nico De Belie Nele |
| author_facet | Giordano Franco Grosso Boon Nico De Belie Nele |
| author_sort | Giordano Franco Grosso |
| collection | DOAJ |
| description | The capacity of hydrated lime to reabsorb CO2 as it hardens has made it a desirable replacement for cement to produce mortars with an overall lower environmental footprint. Still, research into lime-cement formulations remains limited, especially when it comes to their self-healing capacity.
Some studies show that hydrated lime can improve self-healing in cement mixes, but addition rates are low. Here we present how high lime-cement ratios influence the self-healing capacity of lime mortars. Four mixes of increasing lime-cement ratios were cracked with tensile loading and placed under 1 hour wet, 23 hours dry cycles to stimulate self-healing. The mix design of 50 % lime-50 % cement volume (L50C50) showed self-healing abilities and was tested against a pure cement mixture (L0C100). Microscopy and water flow tests were performed at a cracking age of 7 days and then again after 28 days of healing in three regimes.
Overall, submersion was the best healing regime for both L0C100 and L50C50 and crack self-healing was close to total (100 ± 1 % and 98 ± 6 %, respectively). Nevertheless, the water flow tests show that self-healing in L50C50 was in fact less efficient than that of the L0C100, achieving a 39 ± 21 % reduction in water flow versus 86 ± 11 %. |
| first_indexed | 2024-04-09T14:51:03Z |
| format | Article |
| id | doaj.art-7cd1b8fa504a449682fbc1906eb75690 |
| institution | Directory Open Access Journal |
| issn | 2261-236X |
| language | English |
| last_indexed | 2024-04-09T14:51:03Z |
| publishDate | 2023-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | MATEC Web of Conferences |
| spelling | doaj.art-7cd1b8fa504a449682fbc1906eb756902023-05-02T09:34:12ZengEDP SciencesMATEC Web of Conferences2261-236X2023-01-013780202110.1051/matecconf/202337802021matecconf_smartincs2023_02021Influence of Hydrated Lime on the Self-Healing Capacity of Cement MortarsGiordano Franco Grosso0Boon Nico1De Belie Nele2Ghent University, Center for Microbial Ecology and Technology (CMET)Ghent University, Center for Microbial Ecology and Technology (CMET)Ghent University, Magnel-Vandepitte Laboratory, Dept. of Structural Engineering and Building MaterialsThe capacity of hydrated lime to reabsorb CO2 as it hardens has made it a desirable replacement for cement to produce mortars with an overall lower environmental footprint. Still, research into lime-cement formulations remains limited, especially when it comes to their self-healing capacity. Some studies show that hydrated lime can improve self-healing in cement mixes, but addition rates are low. Here we present how high lime-cement ratios influence the self-healing capacity of lime mortars. Four mixes of increasing lime-cement ratios were cracked with tensile loading and placed under 1 hour wet, 23 hours dry cycles to stimulate self-healing. The mix design of 50 % lime-50 % cement volume (L50C50) showed self-healing abilities and was tested against a pure cement mixture (L0C100). Microscopy and water flow tests were performed at a cracking age of 7 days and then again after 28 days of healing in three regimes. Overall, submersion was the best healing regime for both L0C100 and L50C50 and crack self-healing was close to total (100 ± 1 % and 98 ± 6 %, respectively). Nevertheless, the water flow tests show that self-healing in L50C50 was in fact less efficient than that of the L0C100, achieving a 39 ± 21 % reduction in water flow versus 86 ± 11 %.https://www.matec-conferences.org/articles/matecconf/pdf/2023/05/matecconf_smartincs2023_02021.pdf |
| spellingShingle | Giordano Franco Grosso Boon Nico De Belie Nele Influence of Hydrated Lime on the Self-Healing Capacity of Cement Mortars MATEC Web of Conferences |
| title | Influence of Hydrated Lime on the Self-Healing Capacity of Cement Mortars |
| title_full | Influence of Hydrated Lime on the Self-Healing Capacity of Cement Mortars |
| title_fullStr | Influence of Hydrated Lime on the Self-Healing Capacity of Cement Mortars |
| title_full_unstemmed | Influence of Hydrated Lime on the Self-Healing Capacity of Cement Mortars |
| title_short | Influence of Hydrated Lime on the Self-Healing Capacity of Cement Mortars |
| title_sort | influence of hydrated lime on the self healing capacity of cement mortars |
| url | https://www.matec-conferences.org/articles/matecconf/pdf/2023/05/matecconf_smartincs2023_02021.pdf |
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