4.3.3 In the case of tremie concreting, the minimum cement content should be 350 kg/m* of concrete for piles with lower diameters and depths of up to 10 m. The minimum cement content for big diameter and/or deeper piles should be 400 kg/m* of concrete. The maximum limit for dry concrete is 15%. Concrete with higher water-cement ratios or fresh concrete can be used if the temperature at the time of pouring does not exceed 35 °C. Piles made from such concrete will be more resistant to corrosion. Tremie means shower in French. This name was given to these piles because they look like showers when they are being drilled. Tremie concreting is a process by which shallow underground concrete piles are replaced with steel-reinforced concrete piles without using any formwork. This method is commonly employed where formwork is expensive or difficult to obtain. The term "tremie" also refers to the resulting pile. Steel reinforcing is then inserted into the concrete to give it strength. The depth of the new pile will usually be about half that of the old one, so as to avoid having to replace it later on. The main advantage of this method is the reduction in labour costs compared to conventional concrete piling. Formwork is only needed at the top of the hole when placing the concrete slab.