A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Monitoring early-age acoustic emission of cement paste and fly ash paste
Abstract In this study, a combined approach of several monitoring techniques was applied to allow correlations between the AE activity and related processes such as shrinkage and settlement evolution, capillary pressure and temperature development in fresh cementitious media. AE parameters related to frequency, energy, and cumulative activity which exhibit sensitivity to the particle size distribution of cement paste are compared with inert fly ash (FA) leading to isolation of the mechanical sources from the chemical ones. Characterization of the origin of different processes occurring in cement paste during hydration is complex. Although acoustic emission (AE) monitoring has been used before, a qualitative relation between the microstructural formation or other early-age processes and the number or parameters of AE signals has not been established. The high sensitivity of AE enables the recording of elastic waves within the cementitious material, allowing the detection of even low-intensity activities.
Highlights Connection between the early age processes in cement paste and the acoustic emission signals. Comparison between cement paste and fly ash suspension to separately study the chemical reaction and the shrinkage. Parameters of the early-age acoustic emission like frequency and rise time are sensitive to the different processes. Acoustic activity of cement paste for the first hours is mainly attributed to the settlement.
Monitoring early-age acoustic emission of cement paste and fly ash paste
Abstract In this study, a combined approach of several monitoring techniques was applied to allow correlations between the AE activity and related processes such as shrinkage and settlement evolution, capillary pressure and temperature development in fresh cementitious media. AE parameters related to frequency, energy, and cumulative activity which exhibit sensitivity to the particle size distribution of cement paste are compared with inert fly ash (FA) leading to isolation of the mechanical sources from the chemical ones. Characterization of the origin of different processes occurring in cement paste during hydration is complex. Although acoustic emission (AE) monitoring has been used before, a qualitative relation between the microstructural formation or other early-age processes and the number or parameters of AE signals has not been established. The high sensitivity of AE enables the recording of elastic waves within the cementitious material, allowing the detection of even low-intensity activities.
Highlights Connection between the early age processes in cement paste and the acoustic emission signals. Comparison between cement paste and fly ash suspension to separately study the chemical reaction and the shrinkage. Parameters of the early-age acoustic emission like frequency and rise time are sensitive to the different processes. Acoustic activity of cement paste for the first hours is mainly attributed to the settlement.
Monitoring early-age acoustic emission of cement paste and fly ash paste
Dzaye, Evin Dildar (author) / De Schutter, Geert (author) / Aggelis, Dimitrios G. (author)
2019-12-21
Article (Journal)
Electronic Resource
English
Monitoring Acoustic Emission of Fresh Cement Paste
| TIBKAT | 2020
Cement paste composition, cement paste as well as preparation method and application of cement paste
| European Patent Office | 2024
Identification of damage mechanisms in cement paste based on acoustic emission
| British Library Online Contents | 2018
Identification of damage mechanisms in cement paste based on acoustic emission
| British Library Online Contents | 2018
Identification of damage mechanisms in cement paste based on acoustic emission
| British Library Online Contents | 2018