Information about lime, working with lime binders, pozzolans and aggregates: 

Organizations related to lime, lime putty, lime mortar, historic restoration and conservation:

http://www.forumcalce.it (Italy)

http://www.ihbc.org.uk  (United Kingdom)

http://www.buildinglimesforum.org.uk (United Kingdom)

http://www.buildinglimesforumireland.com (Ireland)

http://www.kalkforum.org  (Norway)

http://www.fical.org  (Spain)

http://www.calcina.ch/fr/ (France)

The lime spectrum: An overview of the properties of lime putty, NHL and OPCs and their place in historic restoration:          

http://www.kalkforum.org/uploads/pdf/artikler/The_Lime_Spectrum_pdf.pdf

The availability of Lime and Masonry Construction in New England

www.historicnewengland.org/...or.../pdf231.pdf

Lime mortar and plaster - scientific studes:

http://www.getty.edu/conservation/our_projects/science/mortars/

http://run.unl.pt/bitstream/10362/11497/1/L10%20-%20Faria_Martins_book%20chapter%20from%20DBMC_2013.pdf

Studies on aggregate size distribution in lime mortars with specifications for cold climates mortars:

The myth in the mix 

Aggregate grain size distribution

General guidelines for formulating, working with, and aftercare of lime based mortars:

http://www.nps.gov/tps/how-to-preserve/briefs/2-repoint-mortar-joints.htm

 http://www.heritageltd.com/Binding%20Specification.pdf

Limecrete:

http://www.limecrete.net/Limecrete%20Method%20Statement%20v2.pdf

http://www.ecohousestore.co.uk/pub/files/1190802419_Limecrete.pdf

Zeolite study:

http://www.getty.edu/conservation/our_projects/science/mortars/cement_concrete_research.pdf

Cocciopesto mortars study:

https://ojs.cvut.cz/ojs/index.php/ap/article/download/1672/1504

http://documents.mx/documents/smeaton-project.html