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Continuous monitoring of early-age properties of sprayed mortars by in situ ultrasound measurements

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journal contribution
posted on 2021-08-16, 09:22 authored by F Pellegrino, R Salvador, S Aparicio, MG Hernández, JJ Anaya, Sergio Pialarissi-CavalaroSergio Pialarissi-Cavalaro, I Segura
The development of early age properties of sprayed concrete is a key factor that governs its mix design and safe application. The conventional methods to evaluate the evolution of mechanical strength in sprayed concrete present a large interval between each set of measurements and results present a high scatter. In this context, the objective of this study is to characterize the early age properties of sprayed mortars through a novel continuous monitoring system based on in situ ultrasound measurements. Sprayed mortars were also analyzed by isothermal calorimetry, needle penetration and stud driving method. Results indicate that the system developed here can monitor the evolution of early age properties of sprayed mortars continuously without the common drawbacks observed in penetration tests. This research may lead to the development of a more reliable procedure to characterize the early age mechanical properties of sprayed materials in the worksite under safer conditions.

Funding

This research was financially supported by the project RTC-2015- 3185-4 (MAPMIT), co-funded by the Ministerio de Economía y Competitividad of Spain in the Call Retos-Colaboración 2015 and by the European Union through FEDER funds.

History

School

  • Architecture, Building and Civil Engineering

Published in

Construction and Building Materials

Volume

292

Publisher

Elsevier

Version

  • AM (Accepted Manuscript)

Rights holder

© Elsevier

Publisher statement

This paper was accepted for publication in the journal Construction and Building Materials and the definitive published version is available at https://doi.org/10.1016/j.conbuildmat.2021.123389.

Acceptance date

2021-04-13

Publication date

2021-05-21

Copyright date

2021

ISSN

0950-0618

Language

  • en

Depositor

Prof Sergio Cavalaro. Deposit date: 15 August 2021

Article number

123389

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