Hydraulic ram pumps and Sling Pumps

start wrapping the mould with mesh wire before stability is achieved. Once this is done pull out allnails or as many as you can still pull. Then roll wire mesh around the mould as shown in Fig. 5.40.The wire mesh must extend under the sheet at least 150 mm to the inside of the tank, as shown inFig. 5.32. It also must extend about 200 mm over the top of the sheets. Overlapping must be 200mm. It will be difficult to push the mesh wire underneath the mould, so the 20-mm space must bekept between the slab and the sheets. Where the mesh is hindered by the vertical supportingstructure inside the mould, cut the wire vertically in such a way that both of the cut sides can passthe supporting timber. If the fencing mesh is not tight to the mould, which is likely, use soft wireagain to tie it round tightly. The next step is to increase the reinforcement by a layer of chicken wire,overlapping by 200 mm, Fig. 5.41. The chicken wire should be tied loosely to the mesh wire.figure 5.40 figure 5.41Prepare 10-mm mild steel reinforcement bars bending them at both ends after cutting them to theright length, as shown in Fig. 5.41. The bent ends are to be added to the height of the mould. Thesebars are loosely fixed in position by using soft wire and binding them to the fencing mesh. Thevertical bars should be equidistant from each other, between 1.00 and 1.5 m. After this is achieved,start wrapping 16-gauge fencing wire around the outside, starting at the bottom. This is the sameprocedure as shown in Fig. 5.14 and spacing should be accordingly. Wrap the wire three timesaround the bottom, then coil the wire upwards with a 10-mm spacing for the first 600 mm aboveground. From there you can increase the distance to 20 mm until you reach the upper 300 mm,when you should again narrow the distance to 10 mm and apply it again three times at the top.5.3.3 Plastering outsideAfter the reinforcement is finished, prepare for plastering. For this work, see Chapters 3 and 5.1.The first plastering coat is done one day, then the structure is covered with plastic foil. On thesecond day, the second coat is be plastered, Fig. 5.42. The second coat is float-finished using awooden float. After the second coat is finished, the structure must be covered again with plasticsheeting to keep the plaster damp. Only after a period of about 12 hours (overnight) can the plasticbe removed and the mould be dismantled. For this purpose a scaffold or two ladders joined togetheras shown in Fig. 5.16 must provide access to the inside without damaging the wall. Dismantling ofthe shutter must be carried out with great care, avoiding unnecessary hammering and anythingwhich can affect the structure.57