Development of lime-pozzolan-cement compositions for the repair and strengthening of historic structures

Title: Development of lime-pozzolan-cement compositions for the repair and strengthening of historic structures
Author(s): E.E.E. Toumbakari, C.B. Malami, C.E. Adami, E.N. Vintzileou
Paper category : conference
Book title: Workshop Repair Mortars for Historic Masonry
Editor(s): C. Groot
Print-ISBN: None
e-ISBN: 978-2-35158-083-7
Publisher: RILEM Publications SARL
Publication year: 2009
Pages: 362 - 373
Total Pages: 12
Nb references: 18
Language: English

Abstract: The paper discusses the properties (mainly physical and mechanical) of repair mortars and grouts destined for the repair and strengthening of historic masonry. Mixtures composed of Portland cement in limited quantities, hydrated lime and natural pozzolans are examined. Aim of the mix design is to produce repair materials with Portland cement content as low as possible, to avoid mainly durability failures. Those materials should at the same time be able to ensure effective repair and strengthening of existing masonry structures, especially in earthquake-prone areas. The follow up of the evolution of some key parameters with time, such as compressive and tensile strength and apparent porosity, has shown that the lime-pozzolan-cement compositions can develop a great variety of properties, some of which can satisfy historic masonry requirements. The effect of the use of local, non-standardized materials (mainly sands) instead of well-graded normalised ones is illustrated with the help of case studies. The modification of the curing conditions seems to affect mainly shrinkage and density properties. Lime-pozzolan-cement compositions permit the reduction of the Portland cement content and are able to produce a variety of mechanical and physical properties, sufficient for the repair and strengthening of historic masonry structures.

Online publication: 2009-06-08
Publication type : full_text
Public price (Euros): 0.00