Located 1,000m above sea level, the Boqta dam's wall will contain 180,000m 3 of roller-compacted concrete and 50,000m 3 of conventionally vibrated concrete
. Once completed, the wall will span 210m at its crest, and a 3km service road will be built, necessitating the excavation of one-million cubic metres of material.
traditional vibrated concrete
and the self-compacting concrete (SCC) were compared and concrete casting tasks were assessed for occupational exposure to hand transmitted vibration (HTV) and noise, as well as for WMSD risk using the Quick Exposure Check (QEC), PLIBEL checklist and ErgoSAM method.
RCC is comparatively soft and susceptible to cracks and outflow compared to formal vibrated concrete
used for building thousands of high dams, bridges, and skyscrapers etc.
The autogenous healing of cement and concrete: its relation to vibrated concrete
and cracked concrete, Proceedings of International Association for Testing Materials.
One lesson learned from SCC projects in Europe and Japan is that the production of SCC requires more experience and care than that of conventional vibrated concrete
. Although most common concrete ingredients and mixers can be used for producing SCC, mixes must be designed properly and tested to assure compliance with the project specifications.
Hardened SCC, as compared with traditional vibrated concrete
of similar water/cement ratio, is expected to have:
The mixture with silica fume additions behaviour is similar to a normal vibrated concrete
. At 14 days, the fly ash continues to develop a larger efficiency given to the SCCFA the lowest results of water absorption by capillarity.