In the impact-echo method, the presence and the locations of defects in concrete are estimated from identifying peak frequencies in the frequency spectra, which are responsible for the resonance due to time-of-flight from the defects. In practical applications, however, spectra obtained include so many peak frequencies that it is fairly difficult to identify the defects correctly. SIBIE (Stack ...

Prefabricated concrete structure is an important aspect of the building development in China, while grouted sleeve connection represents a key tool for on prefabricated parts. Various grouting defects may arise during prefabrication and actual construction processes, thereby causing unsafe among components. Here, we report determination mechanical properties full-grouted with defects，using defe...

In this preliminary study, the complexity of the corrosion phenomenon of post-tensioning strands in grouted anchorage assemblies was examined and both physicochemical and electrochemical key technical issues were identified. Measurements of oxygen reduction efficiency in high pH electrolytes were conducted to obtain polarization parameters to be used in modeling. The time evolution of electrica...

The use of prefabricated bridge columns in seismic regions is challenging since performance data on precast column connections limited. A handful accelerated construction (ABC) details to connect adjoining members have been experimentally investigated, and some were found viable for applications field deployment. connection consisting ducts filled with conventional grout the focus present study...