Patent ID: 6644891
Filing Date: 2003-11-11
Classification: C04B,H02G,Y10S

Abstract:
A method of laying cables in a trench, comprising the steps of:removing the original soil to prepare said trench; disposing a first layer of a first composition in said trench; disposing said cables on top of said first layer; disposing a second layer of said first composition on top of said cables; disposing a third layer on top of said second layer formed by a second composition to fill said trench; wherein: said first composition comprises: 60-90% by weight of a crushed sand; 4-15% by weight of a silt; 2-12% by weight of a cement; and 4-15% by weight of water; said sand having a particle size in the range of 0.063 mm to 3.15 mm, and said silt having a particle size in the range from 0.002 mm to 0.063 mm.