The new groups of Formulated Limes (FL) of lime standard EN 459 - bane or boon?
Title: The new groups of Formulated Limes (FL) of lime standard EN 459 - bane or boon?
Author(s): B. Middendorf, D. Klein, S. Hogewoning, S-O. Schmidt
Paper category : conference
Book title: 2nd Conference on Historic Mortars - HMC 2010 and RILEM TC 203-RHM final workshop
Editor(s): J. Válek, C. Groot and J.J. Hughes
Publisher: RILEM Publications SARL
Publication year: 2010
Pages: 1087 - 1095
Total Pages: 9
Nb references: 26
Abstract: Lime is the most commonly used binder for the preparation of mortars for restoration purposes. In the near future the reviewed EN 459 will standardise a new group of limes, the Formulated Limes (FL). Formulated Limes are limes with hydraulic properties mainly consisting of air lime (CL) and/or natural hydraulic lime (NHL) with added hydraulic and/or pozzolanic material. According to EN 459 the mixing of FL allows the blending CL or NHL with the following main constituents: Portland cement including Portland cement clinker, natural pozzolana, natural calcined pozzolana, limestone and/or granulated blast furnace slag. The available lime in FL in the form of Ca(OH)2 should be between 15 to 80% by mass, which means that vice versa, it is possible to prepare standardised limes with a huge amounts of natural and artificial hydraulic components. These FL allow a very dedicated mix design of mortars and plasters with custom-made properties though their interactions between historic substrates remain unpredictable.
Online publication: 2010-10-25
Publication type : full_text
Public price (Euros): 0.00