5. Installation of valves. It is better not to weld the armature, but to bind with the help of a wire, since there will be weak spots in the places of welding. It can be knitted by hand or with the help of a special pistol that is tucked in with a wire bay. For tightening more convenient to use a special hook.
6. Pouring concrete. Alignment To achieve a monolithic ribbon of concrete, the solution must be poured as thoroughly as possible. With large volumes, you can use the finished solution.
For work using concrete M200-M400. When using the M200 grade, the quality of the sand (its class) should be higher. The proportions of the solution can be calculated using the table below.
Filling is done in layers no more than 20 cm. After the trench is filled with concrete, it is trimmed with a bayonet spade or by tapping on the frame of the reinforcement or formwork. (more…)