Acoustic Emission Characteristics of Cementitious Materials During Early Age Hydration

Hamid, I and Wani, UA and Farooq, S and Sharma, A and Sagar, RV (2020) Acoustic Emission Characteristics of Cementitious Materials During Early Age Hydration. In: International Conference on Advanced Research and Innovations in Civil Engineering, 13-14 June 2019, Kochi; India, pp. 103-127.

PDF LEC_NOT_CIV_ENG_83_103-127.pdf - Published Version Restricted to Registered users only Download (1MB) | Request a copy

Abstract

Acoustic Emission (AE) testing was used to study the hydration process in cementitious materials during the first 18 h of setting. AE activity was monitored in fresh cement paste, mortar and concrete specimens. The specimens had a different mixture of composition. It was observed that the AE activity depended on the size of the aggregate present in the cementitious mixture. More AE signals were recorded during the setting process in specimens with the lower w/c ratio than for the higher one. Specimen cast with cement paste showed more AE activity compared to the larger coarse aggregate size (20 mm). The AE activity in fresh concrete is accredited to cavitation in the pores of cement paste during the hydration process and shrinkage. The AE activity showed a notable trend during the time of setting, based on which it was divided into three stages namely, before hydration, partial hydration and complete hydration. The occurrence and duration of these stages varied for cement paste, mortar and concrete. In this study, it was observed that if more AE signals are recorded during the hydration process, higher will be the strength gained by the same concrete in-situ. © 2021, Springer Nature Singapore Pte Ltd.

Item Type:	Conference Paper
Publication:	Lecture Notes in Civil Engineering
Publisher:	Springer Science and Business Media Deutschland GmbH
Additional Information:	cited By 0; Conference of International Conference on Advanced Research and Innovations in Civil Engineering, ARICE 2019 ; Conference Date: 13 June 2019 Through 14 June 2019; Conference Code:249239
Keywords:	Acoustic emission testing; Aggregates; Cements; Hydration; Mixtures; Mortar; Shrinkage, Acoustic emission characteristics; Cementitious materials; Coarse aggregate size; Concrete specimens; Early age hydrations; Fresh concrete; Hydration process; Time of setting, Concretes
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	13 Nov 2020 11:31
Last Modified:	13 Nov 2020 11:31
URI:	http://eprints.iisc.ac.in/id/eprint/66944

Actions (login required)

View Item