TY - JOUR
T1 - RILEM TC 277-LHS report
T2 - lime-based mortars for restoration–a review on long-term durability aspects and experience from practice
AU - Groot, Caspar
AU - Veiga, Rosario
AU - Papayianni, Ioanna
AU - Van Hees, Rob
AU - Secco, Michele
AU - Alvarez, José I.
AU - Faria, Paulina
AU - Stefanidou, Maria
PY - 2022
Y1 - 2022
N2 - For conservation interventions of historic masonry generally lime-based mortars such as pure air lime mortars, lime-pozzolan mortars, natural hydraulic lime mortars and ternary mortars (lime-pozzolan-cement) are used. The main reason is that their hygric and mechanical (strength and ductility) performance are easy to adapt to most existing historic masonry (compatibility requirements). Although the basic appropriateness of lime-based mortars for restoration is undisputed, there are also some limitations in the application of these mortars. In this report a review is given of the theoretical backgrounds and further of laboratory research developments in the field of lime-based binders and mortars over the past decades. Furthermore, practical experiences in positive and negative sense (damage cases) are elaborated. Drawbacks and points of attention are being dealt with, which are essential for a durable application of lime-based mortars for the conservation of historic masonry. In general, it is concluded that points of attention should be addressed through a thorough evaluation of their potential and through testing of their suitability. For these mortars, even more than for modern cement-based mortars, specifically, environmental exposure conditions and application conditions should be considered.
AB - For conservation interventions of historic masonry generally lime-based mortars such as pure air lime mortars, lime-pozzolan mortars, natural hydraulic lime mortars and ternary mortars (lime-pozzolan-cement) are used. The main reason is that their hygric and mechanical (strength and ductility) performance are easy to adapt to most existing historic masonry (compatibility requirements). Although the basic appropriateness of lime-based mortars for restoration is undisputed, there are also some limitations in the application of these mortars. In this report a review is given of the theoretical backgrounds and further of laboratory research developments in the field of lime-based binders and mortars over the past decades. Furthermore, practical experiences in positive and negative sense (damage cases) are elaborated. Drawbacks and points of attention are being dealt with, which are essential for a durable application of lime-based mortars for the conservation of historic masonry. In general, it is concluded that points of attention should be addressed through a thorough evaluation of their potential and through testing of their suitability. For these mortars, even more than for modern cement-based mortars, specifically, environmental exposure conditions and application conditions should be considered.
KW - Binding mechanism
KW - Damage cases
KW - Lime-based mortars
KW - Long-term durability
KW - Practice
UR - http://www.scopus.com/inward/record.url?scp=85142921635&partnerID=8YFLogxK
U2 - 10.1617/s11527-022-02052-1
DO - 10.1617/s11527-022-02052-1
M3 - Article
AN - SCOPUS:85142921635
SN - 1359-5997
VL - 55
JO - Materials and Structures/Materiaux et Constructions
JF - Materials and Structures/Materiaux et Constructions
IS - 10
M1 - 245
ER -