Seite - 1509 - in Book of Full Papers - Symposium Hydro Engineering

4.2. PLACEMENT For RCC dams, important factors shall be considered for placement of the RCC include Transportation; RCC placement temperature; Segregation; Timing; Lift joint conditions and Bedding mortar. Transportation: RCC may be transported from the batching plant to the point of the placement by several means as a function of distance, rate of placement and environmental factors. The method of transport may affect the workability of the RCC and may cause segregation. Transportation and handling equipment should not only have the required capacity but also be capable of being adapted to different mixes and should be designed to minimize segregation. Checks are required to ensure that the method of RCC transport will not adversely affect the fresh RCC properties such as may be induced by drying, wetting or segregation. Maintenance of transport vehicles and conveyor belts has to be carried out and verified. This includes daily maintenance, which entails cleaning off accumulated concrete on the delivery system as well as mechanical maintenance. Figure 2 shows conveyor system for transporting the RCC. Table 4 Typical Quality Control Tests for RCC dam 1509