Assessing the effect of different compaction mechanisms on the internal structure of roller compacted concrete

Selvam, M.; NSSP, Kalyan; Kannan, K. Ramesh; Singh, Surender

doi:10.1016/j.conbuildmat.2022.130072

Cited by 13 publications

(6 citation statements)

References 63 publications

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“…In line with the other fresh and mechanical properties, a significant improvement in tensile strength (8.3%) was observed when the compaction layers increased for the VT method. This is attributed to the denser packing of aggregates, which could render a tortuous crack propagation, thus increasing the energy dissipation and resulting in higher tensile strength ( 8 ). Notably, the difference in the tensile strength of specimens fabricated with three, four, and five layers of compaction with the VT are in the order of −13.3%, +2.7%, and +8.3%, respectively, with respect to the FSs.…”

Section: Resultsmentioning

confidence: 99%

“…The available literature revealed that the laboratory-produced specimens and field cores are statistically different ( 3 , 6 , 7 ). This could be due to the inability of molded RCCP specimens to simulate field properties in laboratory conditions because of differences in the compaction mechanism and effort ( 8 ). For instance, RCCP is laid by an asphalt paver and consequently compacted with different sets of compaction mechanisms, such as initial passes (to force the material down) with pressure (static roller), intermediate passes (to achieve the desired density) with the combination of either impact + vibration + pressure (vibratory roller) or pressure + kneading (pneumatic roller), and a final pass (to remove roller footprints) with pressure (static roller) ( 9 , 10 ).…”

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confidence: 99%

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Tailoring of Compaction Parameters of the Vibratory Table and Vibratory Hammer for Roller Compacted Concrete Pavements to Resemble Field Properties

Selvam

Singh

2023

Transportation Research Record: Journal of the Transportation R

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Previous studies have indicated that roller compacted concrete pavement may demonstrate significant variations in field behavior compared to laboratory specimens. This discrepancy can be attributed to the dissimilarities in compaction efforts between laboratory and field conditions, wherein the laboratory efforts fail to emulate the field compaction. Thus, in the present study, efforts have been made to optimize the compaction parameters, especially the number of layers of widely employed compaction methods, viz, the vibratory hammer (VH) and vibratory table (VT). A field slab was constructed using a duplex roller to provide a target value for the optimization process. Parameters such as packing density, fresh density, mechanical properties, viz, compressive, split tensile, and flexural strength, and porosity were considered for the tailoring process. Fresh density results showed that VT and VH-compacted specimens with ASTM parameters were loosely (−1.1%) and densely compacted (+5%), respectively, compared with field specimens (FSs). Therefore, to determine the optimal compaction parameters, the number of layers increased to five in the VT method and decreased to one in the VH method. Among different compaction layers, only the specimen fabricated with four layers and one layer in the VT and VH methods, respectively, could closely resemble the fresh, mechanical, and porosity of FSs. In addition, a new compaction procedure for fabricating prismatic specimens is developed for the VH and VT methods based on the compaction energy and packing density approaches.

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Section: Resultsmentioning

confidence: 99%

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confidence: 99%

Tailoring of Compaction Parameters of the Vibratory Table and Vibratory Hammer for Roller Compacted Concrete Pavements to Resemble Field Properties

Selvam

Singh

2023

Transportation Research Record: Journal of the Transportation R

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“…The fresh density of concrete mixes was evaluated in accordance with ASTM D1557 standard ( 26 ). The packing density of blended aggregate mixtures was calculated as per the available procedure in the literature ( 27 ). The compressive strength testing of cylindrical (100 × 200 mm) and cubical specimens (100 × 100 × 100 mm) was carried out at 3, 7, and 28 days in accordance with ASTM C39 ( 28 ) and IS 516 ( 29 ) specifications, respectively.…”

Section: Methodsmentioning

confidence: 99%

Comparative Analysis of Jointed Plain Concrete Pavement and Roller-Compacted Concrete Pavement

Selvam

Kumar

Singh

2023

Transportation Research Record: Journal of the Transportation R

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Jointed plain concrete pavement (JPCP) is the widely preferred conventional concrete pavement for highways; however, the higher initial construction cost and extended time for traffic opening limit its applicability. Recent advancements like roller-compacted concrete pavement (RCCP) could address the above concerns of JPCP. Yet, there is a lack of knowledge and comparative studies on the performance assessment, sustainability, and economic analysis of RCCP and JPCP. Therefore, this study aims to evaluate the engineering properties (density, compressive and flexural strength, and fluid flow properties), cost analysis (materials and initial construction cost), and sustainability (carbon dioxide emissions and energy consumption) of both pavements. The fresh density and mechanical properties of RCCP were 8%–9% and 13%–35% higher than JPCP; thus, 44%–89% and 24%–57% reductions in water absorption and porosity were observed in the considered RCCP mixes against JPCP. The higher strength properties of RCCP significantly reduced the pavement thickness by 10%–25%, thereby lowering the materials and initial construction costs by 52%–78%. Further, sustainability assessment through the cradle-to-gate (from raw material extraction to transportation phase) and gate-to-gate (only concrete production in a ready-mix plant) approaches revealed that employment of RCCP could significantly reduce carbon dioxide emissions (9%–30%) and energy consumption (10%–32%) compared with JPCP mixes. The findings show that RCCP can be considered sustainable, economical, and higher-performance pavement than JPCP.

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“…When compaction is not compacted or aggregate separation occurs at the layer, the void ratio of concrete at the layer will increase signi cantly, leading to a reduction in interlayer adhesive force. Insu cient or excessive compaction will lead to deterioration of the concrete performance, which will have an impact on the integral stability or anti-seepage effect of the dam, and affect the healthy operation of the dam; the current research on rolling parameters includes the role of different rolling parameters in vibratory compacted (VC) (Kokubu et al 1996), the monitoring method of rolling parameters (Zhong et 2003) compared the compaction densities and mechanical properties of roller compacted concrete compacted using the Proctor compaction methods with those compacted using gyratory compaction method, and found that the gyratory compaction method produced signi cantly higher densities at higher water contents; Selvam et al (2023) in a comprehensive investigation found that the main factors affecting aggregate distribution are the ratio of aggregates to mortar, particle spacing, and compaction method. The compaction method plays a crucial role in the formation of the internal structure of roller compacted concrete.…”

Section: Introductionmentioning

confidence: 99%

“…However, due to the increase in aggregate particle size, it may cause problems such as aggregate separation or internal defects in concrete, and may also affect the compaction effect of vibratory milling and thus affect the structural impermeability of the dam and the performance of the mix (Hashemi et al 2018). Roller compacted concrete requires proper compaction methods to achieve the required engineering properties, improved compaction increases the load carrying capacity and thus the service life of the project (Selvam et al 2023). The dense accumulation of aggregates in roller compacted concrete mixture helps to achieve higher compressive strengths ).…”

Section: Introductionmentioning

confidence: 99%

Research on the mix proportion and on-site construction technology of a four-graded roller compacted concrete

Shi,

Zhou,

et al. 2024

Preprint

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In order to improve construction and production efficiency, and fully leverage the technical and economic advantages of continuous pouring and rapid rise of roller compacted concrete, the four-graded roller compacted concrete was widely used in hydraulic engineering. Based on the characteristics and testing methods of four-graded roller compacted concrete, the multiple sets, the effects of mix proportion, maximum particle size of coarse aggregate, and compaction degree were analyzed. The differences in construction technology between three-graded roller compacted concrete and four-graded roller compacted concrete were compared, and the more suitable construction technology parameters for four-graded roller compacted concrete were obtained. When the water consumption and vibrating compacted (VC) value are within the range of 71kg/m³~70kg/m³ and 3.5s ~ 6s, respectively, the VC value and air content of four-graded roller compacted concrete are optimal. Choose 30%~32% for sand ratio. The combination ratio of natural coarse aggregates (extra large: large: medium: small) adopts 25: 30: 25: 20. The VC value of 3.5s is suitable. After 6 times of heavy rolling and vibration rolling, the surface has a good slurry state, with a relative compaction degree exceeding 98%. The vibration force is 395kN, and the working speed is 1.0 ~ 1.5km/h. The suggestions as follows: when the layer thickness is 0.4m, the four-graded roller compacted concrete should be rolled twice without vibration, six times with vibration, and two times without vibration; When the layer thickness is 0.5m, the four-graded roller compacted concrete should be rolled twice without vibration, eight times with vibration, and two times without vibration.

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Assessing the effect of different compaction mechanisms on the internal structure of roller compacted concrete

Cited by 13 publications

References 63 publications

Tailoring of Compaction Parameters of the Vibratory Table and Vibratory Hammer for Roller Compacted Concrete Pavements to Resemble Field Properties

Tailoring of Compaction Parameters of the Vibratory Table and Vibratory Hammer for Roller Compacted Concrete Pavements to Resemble Field Properties

Comparative Analysis of Jointed Plain Concrete Pavement and Roller-Compacted Concrete Pavement

Research on the mix proportion and on-site construction technology of a four-graded roller compacted concrete

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