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Construction
Published in Nathalie Schauner, Icold Committee on Concrete Dams, 2020
The favoured RCC layers thickness is ± 300 mm; a thickness that is convenient under field conditions. It can be stated that 300 mm is the thickest layer compatible with the usual RCC mixtures and the usual spreading and compaction equipment and which achieves the specified minimum in situ density and the required layer bonding and dam watertightness.
Design and Construction of RCC Culvert
Published in T. Adachi, K. Tateyama, M. Kimura, Modern Tunneling Science and Technology, 2020
H. Yamamoto, K. Ono, M. Nishigaki
To the next, the construction method of a single RCC layer is as follows. First, RCC is carried by the dump truck and is put once in a steel basket near the culvert. The RCC is put at the construction point using a backhoe and is thinly spread using a mini-backhoe and is compacted using a vibratory roller (2.5 ton ~8 ton). The boundary between the RCC and the embankment is divided by using H-beam.
Three strengthening systems
Published in Lin Li, Farshad Amini, Yi Pan, Saiyu Yuan, Bora Cetin, Hydraulics of Levee Overtopping, 2020
Lin Li, Farshad Amini, Yi Pan, Saiyu Yuan, Bora Cetin
RCC is formed by a mixture of controlled-gradation aggregate, Portland cement, and possible pozzolans (fly ash), mixed with water and then compacted by a roller (e.g., Hansen and Reinhardt 1991; Choi and Hansen 2005). RCC has higher strength properties and abrasive resistance than cement-stabilized soils. The main difference between RCC and conventional concrete is that RCC has an aggregate gradation and paste content suitable for compaction by a vibratory roller (McDonald and Curtis 1997; Choi and Hansen 2005). In addition, conventional concrete has formed or screened surface imperfections that cause cavitation erosion at high (~12 m/s) velocities (ASCE 1994). The major advantages of RCC include reduced cost and speed of construction. RCC has been used in dam construction and/or modification and has potential application for use in protection against levee-overtopping (ASCE 1994; Hansen 2002; Choi and Hansen 2005).
A comparative study on structural design of plain and roller-compacted concrete for heavy-duty pavements
Published in Road Materials and Pavement Design, 2023
Roller-Compacted Concrete (RCC) is the product of using a stiffer than zero-slump concrete mixture than that typically placed by asphalt-type pavers (with some modifications) and compacted by vibratory rollers. In general, RCC has the same basic ingredients as ordinary Portland Cement Concrete (PCC) but with different proportions. It typically has a higher fine aggregate, less cement, and lower water content. Depending on project and targeted strength requirements, the cementitious amount used in RCC pavement may be as high as that of conventional concrete. As it can be seen in Table 1, the latest trend for RCC mix design in the United States (US) is a minimum cement content of ∼270 kg/m3(450 lb/yd3) (in the past ∼180 kg/m3/300 lb/yd3) (RCC Pavement Council, 2021), while in the UK (Britpave, 2022) and EU (Eupave, 2019) countries it is not less than 300 kg/m3.
Mechanistic and microstructural characteristics of roller compacted geopolymer concrete using reclaimed asphalt pavement
Published in International Journal of Pavement Engineering, 2022
Sk Syfur Rahman, Mohammad Jamal Khattak
In the above-described studies, researchers have found the use of RAP in smaller amounts yielded acceptable mechanical properties for both conventional and geopolymer concretes. However, its utilisation for higher dosages compromised the strength and stiffness. In this study, it was intended to investigate the potential improvement of mechanical properties of 100% RAP by introducing the concept of Roller-compacted Geopolymer Concrete. Roller compacted concrete (RCC) is a different type of concrete that is dryer than conventional concrete and must be compacted after placement like hot mix asphalt (HMA) or soils. It contains the same material as conventional concrete except it has a reduced cement content (200 kg/m3) and a zero-slump requirement. High durability and high compressive strength can be expected from a well-designed RCC (Debieb et al. 2009). RCC is less susceptible to cracking due to drying shrinkage and sets fast which makes it more suitable for use in road and dam construction. RCC is considered more economical as compared to conventional concrete as it requires less amount of labour and can be rapidly installed (Abu-Khashaba et al. 2014). The most beneficial aspect of RCC is its reduced cement requirement (100 kg/m3 for dams) (Debieb et al. 2009), although for road construction it may yield a higher quantity of cement and lower water to cement ratio relative to dams (Abu-Khashaba et al. 2014, Chhorn et al. 2017).
Mechanical properties of roller-compacted concrete pavement containing recycled brick aggregates and silica fume
Published in Road Materials and Pavement Design, 2022
Davoud Tavakoli, Pouyan Fakharian, Jorge de Brito
Roller-compacted concrete (RCC) is commonly used in the pavement of roads. It has a zero slump and is compacted by vibration (Chi & Huang, 2014; Duran Atiş, 2005; Li, 1999; Yildizel et al., 2018). In addition to its high production rate, RCC is easy to level and spread as it needs less machinery (Debbarma, Ransinchung, et al., 2019; Debbarma, Singh, et al, 2019; Fakhri & Amoosoltani, 2017). Also, the costs of producing RCC are approximately 10%–20% lower than those of ordinary pavement concrete (Modarres & Hosseini, 2014). The use of RCC has recently played a significant role in the development of transportation infrastructures, due to the increase of oil prices and due to the limitations of asphalt pavements (Hesami et al., 2016; Tsivilis et al., 2000). Given the effective use of RCC in transportation and its economic benefits, and to enhance the quality of RCC to decrease its environmental drawbacks, this study intends to examine this kind of concrete in further detail.