Natural hydraulic lime-based mortars are recommended for retrofitting operations in historical buildings, primarily because of their high chemical-physical and mechanical compatibility; moreover, because their autogenous and engineering self-healing capacities. This work proposes a methodology to quantify the autogenous self-healing in terms of recovery of the compression strength and ultrasonic pulse velocity in samples made of natural hydraulic lime mortars; specimens were pre-cracked at different ages (14 - 84 days) and levels of damage (70% of the compression strength in pre-peak regime; 90% of the compression strength in post-peak regime), and then cured under water up to 28 days. The capacity of healing after two loading/healing cycles has been also investigated. An interdisciplinary approach has been pursued characterising the mechanical aspects of the healing and the chemical nature of the products via SEM/EDS analyses. The results have provided useful indication about the dependence of the self-healing capacity on the aforementioned variables.

Effect of age and level of damage on the autogenous healing of lime mortars

FERRARA, LIBERATO;
2017-01-01

Abstract

Natural hydraulic lime-based mortars are recommended for retrofitting operations in historical buildings, primarily because of their high chemical-physical and mechanical compatibility; moreover, because their autogenous and engineering self-healing capacities. This work proposes a methodology to quantify the autogenous self-healing in terms of recovery of the compression strength and ultrasonic pulse velocity in samples made of natural hydraulic lime mortars; specimens were pre-cracked at different ages (14 - 84 days) and levels of damage (70% of the compression strength in pre-peak regime; 90% of the compression strength in post-peak regime), and then cured under water up to 28 days. The capacity of healing after two loading/healing cycles has been also investigated. An interdisciplinary approach has been pursued characterising the mechanical aspects of the healing and the chemical nature of the products via SEM/EDS analyses. The results have provided useful indication about the dependence of the self-healing capacity on the aforementioned variables.
2017
autogenous self-healing, compressive strength, UPV, lime-based mortar
File in questo prodotto:
File Dimensione Formato  
JCOMB_2017_494_Original_V0.pdf

accesso aperto

: Pre-Print (o Pre-Refereeing)
Dimensione 3.29 MB
Formato Adobe PDF
3.29 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/1024039
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 50
  • ???jsp.display-item.citation.isi??? 42
social impact