PARTIE 2 - Icomos

Theme 2
Session 3
TABLE 2. Size distribution of the aggregates
Eco-plasters revive the plasterwork
techniques of the past
White River Sand Fines Marble Dust Limestone Fines Limestone Dust
Fines
Particle
size (mm)
Passing (%)
Particle
size (mm)
Passing (%)
Particle
size (mm)
Passing (%)
Particle
size (mm)
Passing (%)
0, 425 99,5 0,063 100 6,3 100 0,212 90,38
0, 300 55,0 0,040 86,2 4,0 95 0,180 87,48
0, 212 60,0 0,032 89,2 2,0 63 0,150 81,86
0, 150 89,0 1,0 17 0,125 79,88
< 0, 150 96,5 0,500 24 0,090 71,7
0,250 15 0,063 61,5
0,125 11 0,040 55,14
0,063 8,3 0,032 47,7
< 0,063 41,7
Figures 7. a) Aggregates; b) Rabbit glue, to make scagliola; c) samples of hardened
mortars.
Three binding systems and four types of aggregates were studied: non-hydraulic lime putty; non-hydraulic
lime putty-plaster; plaster of Paris-rabbit glue water; the aggregates were natural quartz-based sand; sand
with 41, 7% limestone fines; limestone powder; marble powder.
Table 1 gives bulk density and chemical composition of the components used, and Fig. 6 their SEM analysis.
Table 2 gives the particles size distribution of the aggregates and Fig. 7 shows some components and hardened
mortars.
3.2. TESTING METHODOLOGY
The water to binder ratio of “Stucco II/Proposal” and workability were measured by flow table, according to
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LE PATRIMOINE, MOTEUR DE DÉVELOPPEMENT
HERITAGE, DRIVER OF DEVELOPMENT