Abstract Stepped spillways are suitable and economical options for high-storage dams that require significant energy dissipation, structural adaptation to roller-compacted concrete dams, spontaneous flow aeration. In this study, a numerical analysis of the hydraulic characteristics skimming regime stepped spillway Zirdan Dam is carried out. A comparison between smooth provided. By preparing mod...

Language: English The Challenge At the outset the asphalt paving process seems to be simple. Trucks deliver hot mix asphalt from plants to the construction site. There the asphalt is loaded on asphalt pavers that evenly spread the asphalt. Finally, compactors compact the asphalt to its required density. Despite this relatively structured process our research shows that there are significant dis...

During the last three decades, the introduction of new construction materials (e.g. RCC (Roller Compacted Concrete), strengthened gabions) has increased the interest for stepped channels and spillways. However stepped chute hydraulics is not simple, because of different flow regimes and importantly because of very-strong interactions between entrained air and turbulence. In this study, new air-...

In recent years, China’s hydropower station projects are mainly concentrated in the southwest region. These huge facing tight construction period and complex conditions, especially strong wind, dry hot, single-point rainstorm, low early-stage strength remarkable later-stage temperature rise of roller-compacted concrete (RCC) dam, it is very difficult to control prevent dam from cracking. Based ...

More than 90% of Malaysian roads are constructed using asphaltic concrete. However, previous investigations of asphaltic concrete have mainly concentrated on the macroscopic properties of the composite materials based on the assumption that the mixtures are homogeneous and isotropic. This paper applies a digital image processing technique to compare the orientations of coarse aggregate particle...

The most important property of a concrete mix is workability, i.e., the ability mixture to spread and take given form while maintaining solidity uniformity. main influence on workability exerted by water consumption and, in part, cement consumption. Workability determined mobility at time filling mold plasticity, deform without breaking continuity. In process vibrating pressing placed mold, tot...

Ethiopia began constructing the Grand Ethiopian Renaissance Dam (GERD) in 2011 on Blue Nile near borders of Sudan for electricity production. The dam was constructed as a roller-compacted concrete (RCC) gravity-type dam, comprising two power stations, three spillways, and Saddle Dam. main is expected to be 145 m high 1780 long. After filling estimated volume water bounded about 74 billion m3. f...

Due to the construction technology of roller compacted concrete (RCC) gravity dams, there are many weak layers that have potential affect seismic performance dams. However, research on response and failure characteristics RCC dams considering their layered characteristic is still lacking. In this paper, zero-thickness cohesive element presented model mechanical behavior layers. An impacted beam...