Use of crushed tile and concrete as filling in pipe trenches

Abstract On the basis of detailed laboratory work and full-scale pipe work, studies have been effected to establish whether it is possible to use crushed tile and concrete in 0-4 mm fractions as filling in pipe trenches. The results of the studies prove that crushed material can be used for levelling and filling material in pipe trenches. The results have been gathered through video inspection and inclination measurements. In addition, deformation measurements were carried out on the plastic pipes in the test field. The compression of the material used in the pipe trenches does not always comply with the minimum requirements to road construction, but damage/deformation has not been demonstrated. The results only prove that the technical conditions of the piping have been observed. No studies have been carried out concerning any up-down movements in the road surface.