Date of Graduation
Statler College of Engineering and Mineral Resources
Civil and Environmental Engineering
Hema J. Siriwardane.
The objective of this research work was to study the performance of flowable fill as a backfill material around buried plastic corrugated pipes. The flowable fill materials used in this study contained varying proportions of fly ash, bottom ash, river sand, waste foundry sand, and cement. The relationships between flowability and compressive strength were investigated for different mixtures by using ASTM test methods in order to design suitable mixtures that meet WVDOT materials specifications. The second phase of the research was to design and construct a laboratory-scale pipe testing apparatus. The final phase was to find the pipe-soil interactions under several variable laboratory conditions using the constructed pipe testing apparatus and different backfill materials. These variables included: trench width, pipe diameter, in-situ soil strength, backfill strength, and surcharge loading. The results of these experiments show that the fly ash based flowable fill materials can be successfully used as a backfill around buried pipes even with narrow trench widths.
Simmons, Andrew Ray, "Use of flowable fill as a backfill material around buried pipes" (2002). Graduate Theses, Dissertations, and Problem Reports. 1898.