Hydraulic ram pumps and Sling Pumps

Fig. 5.14.figure 5.14Now the reinforcement of the wall is ready. It must be lined with cloth from the outside to hold theplaster which will be smeared on the reinforcement from the inside. The material you choose for thiswill be determined by availability. Clean sacks can be cut in straight pieces and sewn together. If youcan get sugar sacks made of nylon, this will be best but jute sacks or sisal material are also suitable.The nylon sugar sacks have proved to be very good. Fix the cloth temporarily at the reinforcement,overlapping by about 50 mm. Then take a roll of sisal string and wrap the cloth from top to bottom atintervals of 50 mm in the same way you tied the gauge wire, but using a uniform interval all over,Fig. 5.15.figure 5.15After the tank is entirely wrapped, make sure there is no gap where the reinforcement is visible.Prepare a scaffold to bridge the wall without touching it. Remember all the plaster has to betransported via this scaffold and during all this procedure the wall will be protected from vibrations.Inside there should be enough space between the scaffold and the wall to allow one man to plasterit. In case material for stable scaffolding is not available, fix two ladders together at the top as shownin Fig. 5.16. Outside they should be spread to prevent transmitting vibrations to the wall. Removethe stabilization spreading from inside. Now it may be necessary to adjust the wall to make it standstraight and in a good circle. The foreman climbs the ladder or scaffold and inspects the shape.Where it is not in good cylindrical form, adjustments are made by fastening lengths of binding wire tothe reinforcement mesh. Pull the wire with just the right strength to remove any sags or bulges (seeFig. 5.16). The next step is the preparation and mixing of the plaster, see Chapter 3.38