The properties of hydraulic mortars were studied by means of simultaneous thermal analysis (STA), according to a procedure
proposed in the literature. Hydraulic limes, cement and/or slaked lime were mixed using different proportions of both inert
and reactive aggregates, in order to test the effectiveness of such procedure in distinguishing the different degree of hydraulicity
of such samples. The use of the normalized coordinates suggested in the literature results in overlapping of the clusters
of different kinds of mortars. Modified coordinates are proposed, which give promising results in view of outlining a ‘master
curve’ of hydraulicity.
Authors:G. Rizzo, Laura Ercoli, B. Megna, and Maria Parlapiano
Long aged mortars from ancient hydraulic constructions of Sicily, i.e. the Roman aqueduct of Thermae and the Punic cisterns
and traditional water supply systems in Pantelleria, have been characterised by means of XRD analysis, optical microscopy
and simultaneous thermal analysis to correlate the hydraulic properties to the texture and to their different role in the
construction, i.e. lining, covering, roofing and joint mortars.
According to a procedure proposed in the literature all of the samples, but two air hardening ones, show high hydraulicity,
which somehow can be related to the characteristics of aggregates.