A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Degree of hydration based analysis of online monitoring of hardening concrete using acoustic emission (AE) and nonlinear elastic wave spectroscopy (NEWS)
In order to evaluate the microstructural properties of freshly poured concrete during curing, a laboratory scale combination of the Acoustic Emission (AE) Technique with Nonlinear Elastic Wave Spectroscopy (NEWS) was developed. The first technique is capable of online monitoring the internal microstructural activity. The second technique is used to probe the nonlinear elastic properties of the microstructure (which gives information about the micromechanical behaviour) through the analysis of the harmonic generation from a continuous wave transmission through the concrete sample. In addition, temperature and P and S wave speeds (providing properties such as Young Modulus of Elasticity and Poisson Ratio) are measured during the curing process at regular time intervals. The evolution in the AE events and in the linear and nonlinear ultrasonic behavior of concrete is analyzed as a function of the degree of hydration for three different compositions during the first three days of the curing process. The results show a good correlation with the phase changes in the concrete due to chemical reactions.
Degree of hydration based analysis of online monitoring of hardening concrete using acoustic emission (AE) and nonlinear elastic wave spectroscopy (NEWS)
In order to evaluate the microstructural properties of freshly poured concrete during curing, a laboratory scale combination of the Acoustic Emission (AE) Technique with Nonlinear Elastic Wave Spectroscopy (NEWS) was developed. The first technique is capable of online monitoring the internal microstructural activity. The second technique is used to probe the nonlinear elastic properties of the microstructure (which gives information about the micromechanical behaviour) through the analysis of the harmonic generation from a continuous wave transmission through the concrete sample. In addition, temperature and P and S wave speeds (providing properties such as Young Modulus of Elasticity and Poisson Ratio) are measured during the curing process at regular time intervals. The evolution in the AE events and in the linear and nonlinear ultrasonic behavior of concrete is analyzed as a function of the degree of hydration for three different compositions during the first three days of the curing process. The results show a good correlation with the phase changes in the concrete due to chemical reactions.
Degree of hydration based analysis of online monitoring of hardening concrete using acoustic emission (AE) and nonlinear elastic wave spectroscopy (NEWS)
Hydratationsgrad basierte Analyse der Online-Überwachung der Aushärtung von Beton mittels Schallemission und nichtlineare elastische Wellenspektroskopie (NEWS)
Schutter, G. de (author) / Sadeleer, W. de (author) / Abeele, K. van den (author) / Wevers, M. (author)
2006
10 Seiten, 10 Bilder, 1 Tabelle, 16 Quellen
Conference paper
Storage medium
English
| Trans Tech Publications | 2014
| British Library Conference Proceedings | 2014