SIXTH FRAMEWORK PROGRAMME

Assessment of desalination mortars and poultices for historic masonry (2006-2009)

EC PROJECT DESALINATIONNEWSLETTER 2/2007

Contract No. 022714

Scientific co-ordinator: Fulvio Zezza University IUAV of Venice

WP 1: managementWP 2: interviews and selection of desalination system WP 3: case studies WP 4: performance of desalination systems WP 5: NMR research moisture and salt transport WP 6: knowledge transfer

Work Package (WP) list

The following meetings have been organized and the meeting minutes have been produced for each scheduled meeting

1st meeting

1st 6M meeting

1st WP4 meeting

1st Workshop Desalination

2nd 6M meeting

Venice, 9-10 May 2006, Italy

Dijon, 19-20 October 2006, France

Delft, 9 February 2007, The Netherlands

Venice, 21-22 May 2007, Italy

Venice, 22-23 May 2007, Italy

WP1 – Coordination

UNIVERSITY IUAV OF VENICE – FACULTY OF ARCHITECTURE Aula Gradoni – Santa Marta, Dorsoduro 2196

Venice May 21-22, 2007

WORKSHOP DESALINATION

The Workshop proposes an approach to the complex desalination question and penetrates into the scientific and technological objects of the EC Project Desalination to gain a better understanding of the salt transport mechanism between salt laden substrates and poultices. Possibilities and limitations of the desalination treatments are considered taking into account from one hand the environmental conditions and the salt origin, and, from the other, the products characterization, within a modular desalination system which considers different substrates as composition and properties.

The Workshop Desalination aims to extend the knowledge of the restorers on the practice for desalination: the materials properties, the environmental conditions, the kind of salt and the type of treatments to apply for desalination play a fundamental role in their decision.

The results of the online survey of Desalination Questionnaire, collated and assessed using statistical software (SPSS), give an insight into the current working practice and materials selection of conservators, contractors and architects

WP2 – Interviews/selection of mortars

Locationof respondents[survey Qu.1]

other 9.9%

Italy 3.3%

France36.3%

Great Britain2.2%

Germany40.7%

Missing 7.7 %

Location of respondents

Poultice type: regional preferences

other

Italy

France

GreatBritain

Germany

Missing

60

50

40

30

20

10

0

modified industrialproducts

industrial products

self made

Type of poultice products used

WP3 – Case studies

In situ investigations

Church of Zoutelande Waag building AmsterdamThe Netherlands

Italy-Venice

Terese Convent San Geremia Church

New OrleansUSA

Augustusburg Palace

Germany-Bruhl France-Dijon

St. Philibert Church

Practical demonstration performed in situ during the 1st Workshop (Venice). Three different kind of poultices with different grain size composition, specifically prepared by Remmers, have been applied on substrates previously detected by NDT techniques. The comparison of the results (pre – post treatment) by means of the methodological research foreseen in the Project will be the aim of the next in situ research work.

WP3 – Case studiesCase study: Terese Convent - Venice

Within the laboratory tests the characterization of poultices workability, shrinkage and composition has been completed for the four main types of poultices:

• cellulose based poultices• clay based poultices (mineral class)• poultices made off a mixture of cellulose and mineral compounds• ready to use poultices

WP4 – Performance of desalination systems

The first results of moisture transport for different kind of poultices (kaolin sand, cellulose poultice and Arbocel poultice) applied on different substrates, (a fired clay brick and a calcium silicate brick), have been presented

The selection of the salt mixture composition for lab test is ready

calcium silicate brickfired clay brickfine porouscoarse

Mixture compositionIon MolesNa 2NO3 1Cl 1

Mixture compositionIon MolesNa 1NO3 1K 1Cl 1

Salt transport and building materials WP5 - NMR research

NMR equipment

Grey calcium silicate stone

White calcium silicate stone

Red brick Yellow marl limestone

WP6 – Knowledge transferimplementation in MDDS Project website:

salt diffusion on porous building materials

TNO organized a miniworkshop for the partners in the project on the use of MDDS (Monument Damage Diagnostic System), which took part in Feb. 2007

The project website was developed (www.bk.tudelft.nl/desalination). Activities around this deliverable have been performed by TNO and subcontractor SNA.

WP33.1.2 Common procedure for assessment of treatments M183.2 Description of case studies M24

WP44.3 Report on the results on the evaluation of the performance of different desalination systems M324.4 Scheme which indicates what desalination system may be used successfully on substrates with specific pore-size distribution M32

WP55.3 Insert for air flow and relative humidity control during NMR scanning M215.4 Input data for model on moisture and ion transport during drying for mortar/mortar/poultice and substrate combination M22

WP66.4 News letters 3 M25

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