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

0505889 - ÚTAM 2020 RIV FR eng C - Conference Paper (international conference)
Pachta, V. - Gulotta, D. - Válek, Jan - Papayianni, I.
Evaluation of the fresh state properties of lime-based grouts through inter-laboratory comparative testing.
5th Historic Mortars Conference. Proceedings of the 5th Historic Mortars Conference. Paris: RILEM Publications, 2019 - (Álvarez, J.; Fernández, J.; Navarro, Í.; Durán, A.; Sirera, R.), s. 1225-1237. RILEM Proceedings, PRO 130. ISBN 978-2-35158-221-3.
[Historic mortars conference /5./. Pamplona (ES), 19.06.2019-21.06.2019]
Institutional support: RVO:68378297
Keywords : lime * grouts * RILEM
OECD category: Materials engineering
https://www.rilem.net/publication/publication/494

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.
Permanent Link: http://hdl.handle.net/11104/0297808