dei, l. lime-alcohol dispersion wall painting conservation

8/7/2019 Dei, L. Lime-Alcohol Dispersion Wall Painting Conservation

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!"!"!"!"

Luigi DeiLuigi Dei

Department of Chemistry & CSGI Consortium

University of Florencevia della Lastruccia, 3 I-50019 Sesto Fiorentino - Firenze - Italy


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Le restaurateur doit rmedier dans la mesure dupossible au divorce fatal que le temps - et plussouvent les hommes - ont provoqu entre lamatire vieillisante et la forme quelle incarne

Paul Philippot

Restorers should make up everything possiblefor the fatal divorce that the time - and more often

the men - have brought on between the agingmatter and the form it embodies


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Best consolidating agent

according to the golden rule

Slaked lime (grassello),

that is Ca(OH)2plus water paste


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Research strategy

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Topics

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Physicochemical characterisation of the dispersions

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Time (hours)

0 2 4 6 8 10 12 14 16 18

-parameter

0

20

40

60

80

100

120

slaked lime/water

powder/1-propanolslaked lime/1-propanol

= {1 - [(At=0

- At)/A

t=0}x100


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water

ethanol

1-propanol

2-propanol

1-butanol

2-butanol

1-octanol

-parameter

020

40

60

80

100

Ca(OH)2Powder

Ca(OH)2Slakedlim

e


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Evaluation of the consolidating power

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3333 /,///,///,///,//

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Resistance to surface abrasion by microdurometer

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Scotch Tape Test parameter in mg.cm-2 is

the average mass of surface specimen

taken away by a strip of scotch tapenormalized to the area (method

developed by Prof. Giorgio Torraca,

Rome, Italy)


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% !!

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[Time(s)]1/2

0 2 4 6 8

Weig

htchange(%)

0

4

8

12

16

Lime/sand 0.125 not treated

Lime/sand 0.125 treated


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Time (hours)

0 50 100 150 200 250

W

eightchange(%)

-6

-5

-4

-3

-2

-1

0

Lime/sand 0.125 not treated

Lime/sand 0.125 treated


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++++ *))*))*))*)) %%%% 2222 %%%% 2-2-2-2-

Lime/sand volume ratio CA/g.cm-2.s-1/2 /m-1 loss of material by STT/mg.cm-2

0.500 0.056 1,111 0

0.333 0.048 625 0

0.125 0.064 312 5.19

0.125 treated 0.035 556 1.37

0.100 0.072 227 7.12

0.100 treated 0.042 417 4.12


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$7$89:$;)+)9;4)$$7$89:$;)+)9;4)$$7$89:$;)+)9;4)$$7$89:$;)+)9;4)$ 2-2-2-2-8+;18+;18+;18+;1

39*$8*9;*9;8$+1+*$*()9;6+11+9;)9;*39*$8*9;*9;8$+1+*$*()9;6+11+9;)9;*39*$8*9;*9;8$+1+*$*()9;6+11+9;)9;*39*$8*9;*9;8$+1+*$*()9;6+11+9;)9;*

+;3*);$*;*$8


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Avnso Church, Copenhaghen


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USA6.jpg


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New horizons for the research

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Conclusions

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dei, l. lime-alcohol dispersion wall painting conservation

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