S. I. Khan, P. Adhikari, Y. Hong, H. Vergara, T. Grout, R. F. Adler, F. Policelli, D. Irwin, T. Korme, and L. Okello School of Civil Engineering and Environmental Sciences, University of Oklahoma, Norman, OK, USA NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD, USA NASA Marshall Space Flight Cente...

A cable-stayed bridge recently constructed by the Ohio Department of Transportation incorporates measures put forth by a Federal Highway Administration study to mitigate stay motion. In following recent trends, the stays at this bridge are built without the use of grout for the purposes of inspection and, if necessary, replacement. Several experiments were performed to determine the viability o...

The longevity of grouting has a significant effect on the safe and sustainable operation of many engineering projects. A 500-day experiment was carried out to study the long-term mechanical behavior of nano silica sol grouting. The nano silica sol was activated with different proportions of a NaCl catalyst and cured under fluctuating temperature and humidity conditions. The mechanical parameter...

Semi-flexible pavement surfacing, or grouted macadam, is an alternative to conventional flexible and rigid pavement. It constructed by injecting cementitious grout into the voids of open-graded asphalt surfacing. The cement used in grouts has adverse environmental effects because carbon dioxide emission production. objective this study was investigate potential using irradiated waste polyethyle...

Tunnelling through cities underlain by soft soil, commonly associated with soil movement around the tunnels and subsequent surface settlement. The predication of ground movement during the tunnelling and optimum support pressure could be based on analytical, empirical or the numerical methods. The commonly used Earth pressure balance (EPB) tunneling machines, uses the excavated soil in a pressu...

The quality of grouted sleeve has a significant influence on the performance splice. Incompactness infilled grout is inevitable in grouting. To investigate tensile behavior splice sleeves due to different compactness, monotonic tests connectors were performed at compactness 100%, 90%, 70%, and 50%, respectively. bond-slip analytical model rebar-grout was deduced by fitting test data, formula fo...

40 Shape memory alloys (SMAs) are a class of smart materials that recover apparent plastic 41 deformation (~6-8% strain) after heating, thus “remembering” the original shape. This 42 shape memory effect (SME) can be exploited for self post-tensioning applications and 43 NiTi-based SMAs are promising as SME is possible at elevated temperatures amenable 44 to practical application compared to con...

For pump installation most experts recommend installing conventional metallic baseplates on concrete foundations and securing them to the foundation with a combination of anchor bolts and epoxy grout. Many papers have been written on the techniques required to obtain a good quality installation free of voids and properly bonded to the concrete and baseplate itself so as to give a long trouble-f...

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...