C ommercially available fiberbased reinforcement for concrete is made of carbon, aramid, or glass filament fibers impregnated in a resin. Some aramid fiber reinforcement consists of aramid filaments without a resin matrix. For general applications, the most important feature of fiber-based reinforcement is its resistance to corrosion, which makes it ideal for reinforcing concrete exposed to hig...

This study aims at presenting a numerical model for predicting grout flow and penetration length into the jointed rock mass using Universal Distinct Element Code (UDEC). The numerical model is validated using practical data and analytical method for grouting process. Input data for the modeling, including geomechanical parameters along with grout properties, were obtained from a case study. The...

Since time domain reflectometry (TDR) has been identified as one of the potential non-destructive methods for quality control of soil nailing works in 2003, further development work has been carried out. This report updates on the experience gained on the use of this technique to determine soil nail length. Various sources of uncertainty of a TDR test have been studied. They include human judge...

Abstract The development and construction of offshore wind farms requires the correct estimation friction that can be mobilised at rock/grout interface. In conventional studies, shear behaviour a joint is usually investigated with laboratory tests under constant normal load/stress (CNL), however, in engineering practice, direct testing stiffness (CNS) has been proved to more realistic assessmen...

Total thermal resistance of ground heat exchanger (GHE) is comprised of that of the soil and inside the borehole. The thermal resistance of soil can be calculated using the linear source theory and cylindrical source theory, while that inside the borehole is more complicated due to the integrated resistance of fluid convection, and the conduction through pipe and grout. Present study evaluates ...

Abstract This paper designed a special-shaped cross-section hollow self-drilling bolt with discharge grooves, in which Mindlin’s solution of displacement was used the elastic wholly grouted bolt. Theoretically, ultimate pulling force and residual were analyzed by considering average distribution assumption stress. The bolts’ performance 2, 3, 4 grooves compared circular bolts, experimental resu...

This article develops an enhanced UHPC-grout shear connection for steel-concrete composite bridges with precast decks. The primary improvement is the use of ultra-high performance concrete (UHPC) as grout. To validate constructability and mechanical new connection, two series experimental tests (including grouting push-out tests) were conducted. Results from show that both pressure method self-...

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...

One of the main issues involved during tunnel construction with tunnel boring machines is the tail gap grouting. This gap is between the external diameter of tunnel lining and the excavation boundary that is filled with high-pressure grouting materials. In this work, three different approaches of gap grouting modeling in the FLAC3D software are investigated with a special attention to the...