Composite Pavement Systems, Volume 2: PCC/PCC Composite Pavements

Rao, Shreenath; Darter, M I; Tompkins, Derek; Vancura, Mary; Khazanovich, Lev; Signore, Jim; Coleri, Erdem; Wu, Rongzong; Harvey, John T.; Vandenbossche, Julie M.

doi:10.17226/22645

Cited by 9 publications

(3 citation statements)

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“…The design and construction requirements of two-lift pavement are the same as conventional concrete pavement with respect to preparing the subgrade, base, and subbase, as well as ensuring adequate mechanical properties and reinforcement percentages. The SHRP2 carried out a detailed cost analysis for the U.S. Highway 14 project, which was 31.4 km long and 8.3 m wide, with a thickness of 230 mm and was constructed near Waseca, Minnesota, where good quality aggregates were not available (Rao et al, 2013). The conventional single-lift concrete pavement bid was compared with the expected costs if the project were to be constructed with two-lift concrete pavement.…”

Section: Cost Analysis Of Two-lift Concrete Pavementmentioning

confidence: 99%

Two-lift concrete paving for sustainable pavements

Alqarni¹,

Fowler²

2019

Sustainable Construction Materials and Technologies (SCMT)

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Two-lift concrete pavement, sometimes referred to as composite pavement, is an innovative technique that involves placing a thinner portland concrete layer over a thicker portland concrete layer at a specified interval. A shortage of suitable aggregates for use in concrete pavements in some regions of the world has become a very serious concern for some organizations. Importing aggregates from faraway locations is neither economical nor practical/sustainable; therefore, the use of local materials is highly desirable. The strength of two-lift concrete pavement technology lies in being able to utilize any of the following for the bottom lift: locally available aggregates, manufactured sands, highcoefficient of thermal expansion (CoTE) aggregates, recycled concrete aggregates (RCA), fractionated reclaimed asphalt pavements (FRAP), lower cement content, or a higher amount of supplementary cementitious materials (SCMs). Some of these materials, however, may not be allowed to be used in single-lift concrete pavements due to issues related to polishing, durability, or strength gain. This paper gives a thorough overview of the historical background, potential environmental and sustainable advantages, and practical challenges related to two-lift pavement.

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Section: Cost Analysis Of Two-lift Concrete Pavementmentioning

confidence: 99%

Two-lift concrete paving for sustainable pavements

Alqarni¹,

Fowler²

2019

Sustainable Construction Materials and Technologies (SCMT)

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“…The stiffness of the concrete layer was determined by using the modulus of rupture and the compressive strength test results ( 16 ). Compressive strength (28-day) and modulus of rupture were measured to be 36.6 MPa (5,308 psi) and 4.52 MPa (656 psi), respectively.…”

Section: Accelerated Pavement Testingmentioning

confidence: 99%

The Use of Laboratory-Measured and Strain-Gauge Backcalculated Asphalt Stiffness for Rutting Performance Prediction

Coleri

Harvey

2019

Transportation Research Record: Journal of the Transportation R

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Laboratory tests are conducted with asphalt concrete materials to determine the expected in-situ performance. In addition, laboratory test results are commonly used in mechanistic-empirical design methods for material characterization to improve the predictive accuracy of the models. However, the effectiveness of laboratory tests in characterizing the long-term performance of asphalt concrete materials needs to be validated to be able to use the results for pavement design and long-term performance prediction. Inaccurate performance characterization and prediction can directly affect the decision-making process for pavement maintenance, rehabilitation, and reconstruction and result in unexpected early failures in the field. The major objective of this study is to determine the impact of using laboratory-measured asphalt stiffness on the prediction accuracy of mechanistic-empirical models. In addition, the effect of using linear-elastic modeling assumptions (layered elastic theory) and neglecting the nonlinearity of pavement response at high load levels (and/or at high strain levels for weaker structures) on the predicted rutting performance was determined. In this study, the effectiveness of the use of laboratory asphalt stiffness tests for in-situ asphalt stiffness characterization was determined by comparing the rutting performance predicted using laboratory-measured stiffness to rutting predicted using strain-gauge backcalculated stiffness. It was determined that laboratory tests are able to characterize the in-situ stiffness characteristics of the asphalt mix used in this study and the stiffness characterization process suggested in this study can provide reliable rutting performance predictions. Results of this study are only applicable to tested rubberized asphalt concrete mixtures.

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“…To achieve this, specifications recommend that the placement of the layers should generally be done within a time limit of 1 hour of each other in order to ensure good bond between layers [6]. The bottom layer serves as the main bending-resistant component of the composite slab, while the top lift is generally constructed with higher-quality constituent materials for improved surface characteristics such as noise and skid resistance [7].…”

Section: Introductionmentioning

confidence: 99%

Load Transfer Stiffness of Two-layer Roller Compacted Concrete for Pavements

Mohammed¹,

Thom²,

Dawson³

2019

J. Mater. Appl.

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Roller compacted concrete (RCC) is a form of plain concrete pavement (JPCP). RCC is a zero-slump concrete consisting of well-graded aggregate, cement and water. RCC has many advantages over other pavement types, particularly cost and speed of construction. Recently, RCC has undergone many developments mostly directed towards improving quality, including smoothness and durability. RCC now has the potential to combine the performance of concrete with the low cost of asphalt installation. A two-layer system of RCC with different aggregate types and sizes was utilized in this study. This paper presents the determination of load transfer stiffness across induced joints in a two-layer RCC system based on a cyclic shear test. The test was carried out for three different upper layer placement cases with different crack widths and load magnitudes. From the test results, an approximate equation was formulated to predict joint deterioration. It is suggested that this equation provides a useful tool to assist in the design of two-layer RCC pavement and, potentially for other concrete pavement types.

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Composite Pavement Systems, Volume 2: PCC/PCC Composite Pavements

Cited by 9 publications

References 0 publications

Two-lift concrete paving for sustainable pavements

Two-lift concrete paving for sustainable pavements

The Use of Laboratory-Measured and Strain-Gauge Backcalculated Asphalt Stiffness for Rutting Performance Prediction

Load Transfer Stiffness of Two-layer Roller Compacted Concrete for Pavements

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