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Influence of Hydrated Lime on the Self-Healing Capacity of Cement Mortars
- Source :
- MATEC Web of Conferences, Vol 378, p 02021 (2023)
- Publication Year :
- 2023
- Publisher :
- EDP Sciences, 2023.
-
Abstract
- 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 %.
- Subjects :
- Engineering (General). Civil engineering (General)
TA1-2040
Subjects
Details
- Language :
- English, French
- ISSN :
- 2261236X
- Volume :
- 378
- Database :
- Directory of Open Access Journals
- Journal :
- MATEC Web of Conferences
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.7cd1b8fa504a449682fbc1906eb75690
- Document Type :
- article
- Full Text :
- https://doi.org/10.1051/matecconf/202337802021