Evaluation of the fresh state properties of lime-based grouts through inter-laboratory comparative testing

Author(s): Vasiliki Pachta, Davide Gulotta, Jan Valek, Ioanna Papayianni
Paper category: Proceedings
Book title: Proceedings of the 5th Historic Mortars Conference
Editor(s):José Ignacio Álvarez, José María Fernández,Íńigo Navarro, Adrián Durán, Rafael Sirera
e-ISBN: 978-2-35158-222-0
Publisher: RILEM Publications SARL
Publication year: 2019
Pages: 1225-1237
Total Pages: 13
Language : English

Abstract: The need for evaluating the efficacy of the fresh state properties testing of lime-based
grouts emerged during the activities of RILEM TC SGM and continued in the frame of RILEM
TC 277 LHS. To this direction, a collaboration of three laboratories was achieved (AUTH,
POLIMI, ITAM) to perform a protocol of testing grouts. The first question confronted was the
influence of the binding system on the fresh state properties. Six types of grout mixtures
were prepared (repeated 2 to 8 times) and tested. The binders used were Ledan TB1, PLM-A,
NHL 3.5, finely milled NHL 3.5 quicklime, Roman cement : air lime (4:6) + 0.3‰ citric acid
and lime : pozzolan (1:1) + 1% w.w. superplasticizer. The fresh state properties measured
were fluidity (ASTM C939-02, EN 445: 2007), penetrability (EN 1771:2004) and volume
stability (ASTM C 940-98A). The type of mixer (Hobart or high speed), the time of mixing, as
well as the grout and the room temperature were recorded. From the evaluation of the
results, it was concluded that different types of grout performed differently in mixing and
testing procedures, while the mixing time and the room temperature also affected the
grouts’ properties.

Online publication : 2019
Publication type : full_text
Public price (Euros) : 0.00

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