Specifications Part 1 - Water Supply, Sewerage and Tube Well Works

WEIGHT OF COMMON FILLING MATERIALSTable 11.4MaterialWeight Kg/m³Dry sand 1600Ordinary (damp) sand 1840Wet Sand 1920Damp clay 1920Saturated clay 2080Saturated topsoil 1840Sand and damp soil 160011.7 Jointing:11.7.1 The stoneware pipes shall be cement jointed or provided with bituminous.11.7.2 The materials shall consist of the following.(a) Spun yarn or tarred gaskets.(b) Cement.(c) Sand11.7.3. In each joint, spun yarn soaked in neat cement slurry or tarred gasket shall bepassed round the joint and inserted in it by means of a caulking tool. More yarnor gasket shall be added if necessary and shall be well caulked. Yarn or gasketso rammed shall not occupy more then one fourth of the depth of socket.11.7.4 Cement mortar (1:1) (one part of cement to one part of sand) shall be slightlymoistened and carefully inserted by hand into the remaining space of the jointafter caulking of yarn or gasket. The mortar shall than be caulked into the jointwith a caulking tool. More cement mortar shall be added until the joint spacehas been completely filled with tightly caulked mortar. The joint shall then befinished off neatly outside the socket at an angle of 45 degrees (IS 4127-1983)11.7.5 The cement mortar joints shall be cured at least for seven days before testing.11.7.6 The approximate quantity of cement and spun yarn required for each joint forcertain common sizes of pipes are given below for guidance.Table 11.5CementKg100 1 0.25150 1.5 0.35200 2 0.70250 2.5 0.80300 3.25 1.10350 4.5 1.25400 5.5 1.50Nominal Dia of PipemmSpun YarnKgUrban Administration & Development Department Page 133