This paper reports the results of a test programme to determine the friction characteristics of polypropylene straps embedded in compacted colliery spoil. These straps are being considered as an alternative to traditional high adherence galvanized steel straps because of possible corrosion problems associated with steel straps. Laboratory tests have been performed to assess the suitability of colliery discards as backfill material and the soil-strap interaction. The test results showed that the more angular fill gave higher pull-out resistance and friction values. The results provide information on the friction characteristics which can be used in the design of reinforced earth retaining walls using compacted coal wastes as the fill material. Finally, comparison is made of the cost benefits of using these materials in a more conventional structure.
Bok-youn, K. & In-Ki, I. (1990) A study on utilization of coal mining wastes in Korea. In Proceedings, 3rd International Conference on Reclamation, Treatment and Utilization of Coal Mining Wastes. Glasgow, U.K., 369-376.
2.
Bouazza, A., Finlay, T.W. & Wei, M.J. (1990a) Interface friction of two different straps in burnt shale. In Proceedings, International Conference of Construction on Polluted and Marginal Land. London, U.K., 29-31.
3.
Bouazza, A., Finlay, T.W., Wei, M.J. & Hytiris, N. (1990b) Friction characteristics of polypropylene straps in various fills. In Proceedings, 3rd International Conference on Reclamation, Treatment and Utilization of Coal Mining Wastes . Glasgow, U.K., 349-354.
4.
Bouazza, A. & Wei, M.J. (1993) Large shear box tests on reinforced colliery spoils . In Proceedings, 4th International Conference on Reclamation, Treatment and Utilization of Coal Mining Wastes. Krakow, Poland, 1, 127-133.
5.
Brady, K.C., Barrat, D.A. & Cater, R. (1990) Performance of an Experimental Reinforced Earth Structure using Soft Chalk Backfills. Transport Road Research Laboratory, Report no. 260, Crowthorne, U.K.
6.
Finlay, T.W., Wei, M.J. & Hytiris, N. (1988) Friction characteristics of polypropylene straps in reinforced minestone. In Proceedings, International Symposium on Practice of Earth Reinforcement, Fukuoka. Kyushu, Japan. 87-92.
7.
Fernando, D. & Finlay, T.W. (1990) Economics, geotechnicals properties and cost benefits of using low grade materials as fill. In Proceedings, International Conference of Construction on Polluted and Marginal Land. London, U.K., preprint.
8.
Guler, E. (1990) Lime stabilized cohesive soil as a fill for geotextile reinforced retaining structures. In Proceedings, 4th International Conference Geotextiles, Geomembranes and Related Products . La Hague, The Netherlands, 1, 39-44.
9.
Haji-Ali, F. (1990) Field behaviour of a reinforced earth wall in malaysian condition. In Proceedings, International Conference on Performance of Reinforced Structures. Glasgow, U.K., preprint.
10.
Hollinghurst, E. & Murray, R.T. (1986) Reinforcing earth wall at A3/A322 interchange: design, construction and cost. In Proceedings, Institution of Civil Engineering. 1 (80), 1327-1341.
11.
Jewell, R.A. & Jones, C.J.F.P. (1981) Reinforcement of clay soils and waste materials using grids. In Proceedings, 10th International Conference on Soil Mechanics and Foundations Engineering . Stockholm, Sweden, 1, 701-706.
12.
Jones, C.J.F.P. (1984) The use of ash in reinforced earth. In Proceedings, 2nd International Conference on Ash Technology and Marketing, London, U.K., 543 -547.
13.
Rainbow, A.K.M. (1983) An Investigation of some factors influencing the suitability of minestone as the fill in reinforced earth structures. PhD Thesis , Nottingham University, Nottingham , U.K.
14.
Rainbow, A.K.M. (1987) Minestone fill in reinforced earth abutments. Highway andTransportation Engineering, 34 (6), 25-31.
15.
Sleeman, W. (1990). Environmental effects of the utilization of coal mining wastes. In Proceedings, 3rd International Conference on Reclamation, Treatment and Utilization of Coal Mining Wastes . Glasgow, U.K., 65-76.
16.
Taylor, R.K. (1978). Properties of mining wastes with respect to foundations. Foundations Engineering in Difficult Ground ( Newnes-Butterworths, eds). London, U.K., 175-203.
17.
Temporal, J., Craig, A.H., Harris, D.H. & Brady, K.C. (1989) The use of locally available fills for reinforced and anchored earth. In Proceedings, 12th International Conference on Soil Mechanics and Foundations Engineering. Rio de Janeiro, Brazil, 1315-1320.
