Monitoring lime and cement improvement using spectral induced polarization and bender element techniques
- Autor(en)
- Bate Bate, Junnan Cao, Chi Zhang, Na Hao, Song Wang
- Abstrakt
Spectral induced polarization (SIP) and bender element (BE) techniques show a high sensitivity to particle size, particle distribution and content of generated hydration products, which essentially govern the efficiency of ground improvement. In this context, both SIP and BE were integrated on a column setup to monitor the processes of lime and cement stabilization. A 5 mmol/L Na2CO3 solution was injected into the sand-lime mixture to produce CaCO3 precipitation, while deionized water was injected into the sand-cement mixture to induce the hydration of cement. The average diameters of the precipitated particles or clusters were calculated from the relaxation time, which was a significant parameter of SIP signals, via the Schwarz equation. Two pairs of BE were used to demonstrate the heterogeneity of the product precipitation, which was probably caused by the location of the inflow and outflow on the SIP-BE column. SIP and BE showed the capability of nondestructively monitoring the spatiotemporal chemical evolution processes, which could be helpful for engineering applications.
- Organisation(en)
- Institut für Meteorologie und Geophysik
- Externe Organisation(en)
- Zhejiang University (ZJU), Georgia Southern University
- Journal
- Journal of Rock Mechanics and Geotechnical Engineering
- Band
- 13
- Seiten
- 202-211
- Anzahl der Seiten
- 10
- DOI
- https://doi.org/10.1016/j.jrmge.2020.06.005
- Publikationsdatum
- 2021
- Peer-reviewed
- Ja
- ÖFOS 2012
- 105906 Umweltgeowissenschaften, 105126 Angewandte Geophysik
- Schlagwörter
- ASJC Scopus Sachgebiete
- Geotechnical Engineering and Engineering Geology
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/7325ddea-609c-4a16-a35d-d6d3d41d0f0a