Hydraulic ram pumps and Sling Pumps

ground and straightened for several days, by pressing it with a heavy weight.Reinforcement shall be bent to the required detail, and cold-formed by approved means.Reinforcement shall be free from loose mill scale, rust, oil, grease or other harmful matter.Unless otherwise directed, reinforcement shall be covered with the following: slab -15 mm, beam-25 mm, foundation -50 mm. Concrete covering for reinforcement shall be maintained as shown ondetailed drawings, using all necessary spacers and other temporary supports as required.FormworkFormwork shall be approved and shall conform to the shape, lines, levels and dimensions of theconcrete, as shown in the drawings, and shall be true, rigid, properly braced and sufficiently strongenough to prevent bulging or distortion. All joints shall be sufficiently tight to prevent loss of liquidfrom the concrete. Immediately before concreting, the area of timber in contact with the concreteshall be thoroughly wet or, preferably, treated with shutter oil. When shutter oil is used, none of itshall come into contact with the reinforcement. The Contractor shall be responsible for any damageto work and any consequent damage caused by negligent handling of formwork. Formwork for roofslab shall not be removed before permission to do so has been given by the Clerk of Works. Theminimum period required before removal is 14 days, during which the slab shall be kept wet at alltimes, or covered with an approved waterproof material which shall be in contact with the concretefor the entire period.BrickworkCementSee Concrete Work above.SandPit sand free of clay and vegetable matter shall be mixed with fine river sand to produce a workableand strong mortar. Sand for mortar shall be fine-grained and, if required, shall be screened througha 3-mm sieve screen.Cement MortarCement mortar shall be made of three parts sand to one part cement by volume. Cement mortarshall be mixed in small quantities and shall be used within 30 minutes of mixing.BricksThe dimensions, crushing strength and absorption of clay bricks or cement bricks shall comply withstandard specifications. Before use, all bricks shall be saturated with water.BrickworkBrickwork shall be well bedded and flushed up solid in mortar throughout the whole wall. No oneportion of the wall shall be raised more than one metre above the remaining wall. Mortar joints shallbe 10 mm thick. All wall reinforcement shall be covered entirely with cement mortar joints.Brickwork shall be built in cross bond; no false headers shall be used. Horizontal reinforcement shallbe tied with binding wire on vertical rods from the inside.Cement ScreedCement screed shall comprise one part cement to three parts sand and shall be floated to a trueplane surface with a wooden float. Sand used for screed shall be screened through a 3-mm meshscreen to expel all vegetable matter, pebbles, etc. Sand used shall be pure river sand with less than72