Production of Roller Compacted Concrete Made of Recycled Asphalt Pavement Aggregate and Recycled Concrete Aggregate and Silica Fume

Ashteyat, Ahmed M.; Obaidat, Ala’ Taleb; Kırgız, Mehmet Serkan; AlTawallbeh, Baiena

doi:10.1007/s42947-021-00068-4

Cited by 18 publications

(4 citation statements)

References 34 publications

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“…The influence of moisture states of RCA on the compactness of RCCP mixtures is presented in Figure 4 and Table 5. As seen in Figure 4, the replacement of RCA lowers the density with the presence of its low-density AM, and consequently, a decrease in the density increases as the fractions of RCA increase ( 49 ). Including RCA in the dry state negatively affected the maximum compactness by 5.7%, 4.5%, and 14.5 % for coarse, fine, and total RCA-inclusive RCCP mixtures, respectively.…”

Section: Resultsmentioning

confidence: 99%

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Enhancing the Performance of Roller-Compacted Concrete Pavement by Synergetic Improvement of Packing Density, Lubrication, and Moisture State of Recycled Concrete Aggregate

Selvam

Singh

Anjana

2023

Transportation Research Record: Journal of the Transportation R

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Roller-compacted concrete pavement (RCCP) is considered superior to other pavement types with reference to cost, ease of construction, and performance. However, the aggregate demand is significantly higher in RCCP than in the conventional concrete pavement. It is predicted that natural minable limestone sources would be exhausted in India in the next 30 to 40 years. One way to reduce the natural aggregates (NA) requirements in RCCP is through the integration of recycled concrete aggregates (RCA). However, the physical property of RCA is significantly inferior to that of NA owing to the presence of adhered mortar (AM), which increases the water demand by 2.3 to 4.6 times and affects the compactness and hardened-state behavior of RCCP. This study has tried to enhance the compactness and improve the performance of RCCP containing RCA (coarse, fine, and total RCAs) through different synergetic approaches. This, in turn, enhances the interlocking capacity using the particle packing approach, followed by mitigating the negative effects of AM by altering the moisture states, then improving the compactability and lubricating the matrix with superplasticizers. The results depict that altering the moisture states alone could adversely affect the RCCP performance because of the moisture transfer mechanism from the hydraulic gradient. Moreover, the inclusion of superplasticizers in different moisture states could manifest better aggregate rearrangement and compactability. Further, it could improve the tensile behavior of the RCCP compared with the concrete containing NA. These findings favor the complete replacement of NA by RCA for low-volume rural road construction.

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Section: Resultsmentioning

confidence: 99%

Section: Fresh Propertiesmentioning

confidence: 91%

Enhancing the Performance of Roller-Compacted Concrete Pavement by Synergetic Improvement of Packing Density, Lubrication, and Moisture State of Recycled Concrete Aggregate

Selvam

Singh

Anjana

2023

Transportation Research Record: Journal of the Transportation R

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“…Recycle concrete aggregate and recycle asphalt pavement aggregate can be incorporated in different rates into RCC mixture by the aim of use in lower traffic pavements. Moreover, besides of waste recycle, reduce actualizes on the cost of RCC [7]. In low rates of rubber addition into RCC mixtures, improvements on compressive strength and flexural strength achieves to obtain.…”

Section: Introductionmentioning

confidence: 99%

Roller compacted concrete technology for vehicle parking area solutions

Dutkiewicz,

Yildirim,

Stałowski

et al. 2024

MATEC Web Conf.

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The purpose of the article is presenting the application of the roller compacted concrete (RCC) as alternative solution to asphalt parking places and roads, showing the advantages and further possibilities for development of RCC in wide range of projects. RCC is produced similar to conventional concrete. However, RCC is zero slump concrete unlike conventional concrete. In this study the construction for parking area in RCC technology is presented for the real project. Presented cases concern heavy and light vehicles parking areas. The experimental results shows the very good quality of RCC placed on site, high compressive strength of the concrete, good workability of the concrete mixture that allows for proper placing of the concrete. RCC provides better mechanical-durable properties, more economical and less carbon footprint based on proper compaction and on lower water/cement ratio comparing to conventional concrete. The article draws attention to the role of the soil under the RCC as well, which should be designed and prepared on site with an appropriate stiffness and should be made according to the requirements resulting from the use of RCC. Such a comprehensive implementation of the soil-RCC subbase system guarantees the proper quality, load-bearing capacity and durability of the structure of the parking places as well as roads, for the assumed period of operation.

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“…Recycling industrial and natural wastes to produce sustainable construction materials has attracted a lot of attention for a decade [ 4 , 5 ]. For instance, palm kernel shells [ 6 ], palm oil fuel ash [ 7 ], recycled concrete [ 8 ], rubber tires [ 9 ], and recycled asphalt [ 10 ] are used as alternatives for aggregates. Crushed WOS also have a lot of potential as an aggregate in cement mortar and concrete.…”

Section: Introductionmentioning

confidence: 99%

Engineering Properties of PVA Fibre-Reinforced Geopolymer Mortar Containing Waste Oyster Shells

et al. 2022

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Recycling crushed waste oyster shells (WOS) as a fine aggregate is an attractive method of disposal. However, its use in geopolymer mortar has not been reported. The influence of PVA fibres on the engineering properties of the new geopolymer mortar is still unclear. To bridge the gap, this study investigated the influence of various PVA fibre contents (0–1.05 vol%) on the flowability, compressive, flexural strengths, drying shrinkage, sorptivity, chloride resistance, porosity, fibre dispersion, embodied CO2 emissions (ECO2e), and embodied energy (EE) of the geopolymer mortar. The results indicated that the inclusion of 0.15–1.05 vol% of PVA fibres improved the flexural strength by 10.10–42.31% and reduced the drying shrinkage by 13.37–65.79%. The flowability and compressive strength decreased by 10.78–34.28% and 7.50–27.65%, respectively, but they were sufficient for construction. The sorptivity increased by 1.45–15.16%, and the chloride resistance decreased by 15.09–56.35%, but the geopolymer mortar was still classified as low chloride penetrability. In summary, the optimal content of PVA fibres is 0.45 vol%, and the geopolymer mortar has good engineering properties and eco-efficiency. The cost analysis and high-temperature resistance of the geopolymer mortar are neglected in this study, which should be evaluated in future work.

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Production of Roller Compacted Concrete Made of Recycled Asphalt Pavement Aggregate and Recycled Concrete Aggregate and Silica Fume

Cited by 18 publications

References 34 publications

Enhancing the Performance of Roller-Compacted Concrete Pavement by Synergetic Improvement of Packing Density, Lubrication, and Moisture State of Recycled Concrete Aggregate

Enhancing the Performance of Roller-Compacted Concrete Pavement by Synergetic Improvement of Packing Density, Lubrication, and Moisture State of Recycled Concrete Aggregate

Roller compacted concrete technology for vehicle parking area solutions

Engineering Properties of PVA Fibre-Reinforced Geopolymer Mortar Containing Waste Oyster Shells

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