The Influence Analysis of the Soil Base and the Base Stiffness of Highway Asphalt Pavement on Pavement Thickness

2012 ◽  
Vol 178-181 ◽  
pp. 1406-1409
Author(s):  
Jian Song ◽  
Wen Yan Cui ◽  
Yun Yun Fan
Keyword(s):  
Asphalt Pavement ◽  
Economic Effect ◽  
Base Material ◽  
Layered System ◽  
Soil Base ◽  
Current Design ◽  
Base Course ◽  
Pavement Base ◽  
Pavement Thickness ◽  
Important Significance

Using pavement thickness layered system computational theories and methods that current design criteria proposed, according to the result of the calculating example, this paper analyzed the influence of different soil base and the base stiffness of highway asphalt pavement for base thickness, and pointed out that thickness of pavement base decreased with increase of the soil base and the base stiffness. Therefore, optimum selecting fillers in constructing road bed beside the upper part of the roadbed, strengthening the subgrade and compacting by layer, to improve the mechanical properties of subgrade. Meanwhile, it has important significance in obtaining the obvious economic effect on decreasing thickness of pavement structure by properly using base material of high stiffness. Besides, this result indicate that the base course underside stresses increased with the base stiffness, therefore, the base course underside stresses should be checked, to ensure the corresponding the tensile strength of base material.

scholarly journals Evaluation on Strength Properties of Lime–Slag Stabilized Loess as Pavement Base Material

2019 ◽  
Vol 11 (15) ◽  
pp. 4099 ◽  
Author(s):  
Liang Jia ◽  
Li Zhang ◽  
Jian Guo ◽  
Kai Yao ◽  
Sin Mei Lim ◽  
...  
Keyword(s):  
Base Material ◽  
Correlation Coefficients ◽  
Strength Properties ◽  
Binder Content ◽  
Curing Time ◽  
Test Results ◽  
Base Course Material ◽  
Course Material ◽  
Base Course ◽  
Pavement Base

This study aimed to investigate the feasibility of using lime–slag stabilized loess as base-course material by assessing its unconfined compressive strength (UCS). Loess stabilized with various mix ratios were compacted and cured to three, five, seven, and 28 days, respectively, for further strength tests. The effects of binder content, lime-to-slag (L/S) ratio, porosity, and curing time on the UCS of stabilized loess were addressed in detail. The test results show that UCS increases with the increase in binder content or curing time, and it gains strength rapidly within the first seven days of curing. At the same binder content, UCS decreases with the decrease in L/S ratio or porosity. Finally, the correlations of UCS with binder content, porosity, and curing time were derived, which exhibited reasonable correlation coefficients R2 (from 0.86 to 0.97).

Lincoln Avenue Reclaimed Asphalt Pavement Base Project

1996 ◽  
Vol 1547 (1) ◽  
pp. 89-95 ◽  
Author(s):  
Navneet Garg ◽  
Marshall R. Thompson
Keyword(s):  
Asphalt Concrete ◽  
Laboratory Testing ◽  
Asphalt Pavement ◽  
Base Material ◽  
Field Performance ◽  
Concrete Surface ◽  
Performance Data ◽  
Reclaimed Asphalt ◽  
Concrete Production ◽  
Pavement Base

Pavement rehabilitation and reconstruction operations have generated large supplies of reclaimed asphalt concrete (RAC). In Illinois crushed RAC generally called recycled asphalt pavement (RAP) supplies are not 100 percent recycled into hot-mix asphalt concrete production. RAP acceptance as a pavement base material has been limited because of the lack of laboratory testing information, information on structural behavior, and field performance data. Limited preliminary laboratory testing and isolated commercial and local road agency paving experience in Illinois indicate that RAP has significant potential as a pavement base. RAP base potential was evaluated by constructing the Lincoln Avenue (Urbana, Illinois) demonstration project during late September and early October 1993. The pavement section is a 305-mm (12-in.) lime-modified, fine-grained subgrade, a 203-mm (8-in.) compacted RAP base, and a 76-mm (3-in.) dense-graded asphalt concrete surface course. The construction, structural response, and performance of the Lincoln Avenue RAP base project were monitored as part of a cooperative study (Illinois Department of Transportation, City of Urbana, and University of Illinois). The accumulated construction, field testing and evaluation, and laboratory testing data and information are summarized. The field construction experience, field control test data, laboratory testing results, falling weight deflectometer results, and Lincoln Avenue performance data indicate that RAP can successfully be used as a conventional flexible pavement base material. The performance of the Lincoln Avenue RAP base pavement (to date) is comparable with that of a crushed stone base.

Investigation of Performance of Asphalt Pavement with Fly-Ash Stabilized Cold In-Place Recycled Base Course

2003 ◽  
Vol 1819 (1) ◽  
pp. 27-31 ◽  
Author(s):  
Haifang Wen ◽  
Mathew P. Tharaniyil ◽  
Bruce Ramme
Keyword(s):  
Fly Ash ◽  
Asphalt Pavement ◽  
Asphalt Pavements ◽  
Generation Process ◽  
Falling Weight Deflectometer ◽  
Structural Capacity ◽  
Base Course ◽  
Pavement Base ◽  
Granular Base ◽  
Falling Weight

Class C fly ash is a coal combustion product from lignite or subbituminous coal obtained as a result of the power generation process. In recent years, efforts have been made to incorporate self-cementing fly ash into cold in-place recycled (CIR) asphalt material to improve the structural capacity of asphalt pavement base layers. In this study, asphalt pavements in County Trunk Highway JK in Waukesha County, Wisconsin, were pulverized in place and mixed with fly ash and water to function as a base course. To evaluate the contribution of fly ash to the pavement’s structural performance, nondestructive deflection tests were performed with a KUAB 2m-FWD falling weight deflectometer (FWD) on the outer wheelpath right after construction. The MICHBACK program was used to backcalculate the material properties of pavement layers from FWD measurements of deflection. The average moduli of the materials in the hot-mix asphalt layer, fly ash–stabilized base course, and subgrade were backcalculated. The structural capacity and structural number were also obtained from FWD test data. The structural coefficient of 0.16 was obtained for the fly ash–stabilized base course in the highway. The results of FWD testing indicate that CIR stabilization with self-cementing fly ash is an economical method of recycling flexible pavements and eliminates the need for expensive new granular base courses for road reconstruction.

scholarly journals A Sustainability Perspective for Unbound Reclaimed Asphalt Pavement (RAP) as a Pavement Base Material

2018 ◽  
Vol 11 (1) ◽  
pp. 78 ◽  
Author(s):  
Christina Plati ◽  
Brad Cliatt
Keyword(s):  
Mechanical Behavior ◽  
Asphalt Pavement ◽  
Constitutive Models ◽  
Base Material ◽  
Pavement Design ◽  
Environmental Benefits ◽  
Systematic Evaluation ◽  
Reclaimed Asphalt Pavement ◽  
Reclaimed Asphalt ◽  
Pavement Base

The present study aims to investigate reclaimed asphalt pavement (RAP) materials for utilization for a pavement base layer material with the goal towards increasing the reutilization of materials and the movement towards increased pavement sustainability. Reduced cost for materials and transportation of materials, overall environmental benefits and many other advantages have led to increased interests in utilizing RAP in pavements including as base materials for highway/roadway construction projects. The potential advantages of utilizing RAP as an unbound base material are known; however, its overall application is still limited partially due to the lack of systematic evaluation studies for the parameterization of RAPs mechanical behavior in pavement design. With this in mind, the current investigation focuses on the resilient modulus (Mr) properties of RAP aggregates in terms of a material’s elastic response. Experimental data from tri-axial stress tests on specimens consisting of RAP, aggregates and a mixture of both materials are investigated. A number of constitutive models for the description of mechanical behavior of RAP materials are investigated. The required procedures for determining the constitutive constants of the constitutive models is outlined for the aforementioned materials. A comparative analysis is applied, and the related results are evaluated. The main conclusion is that RAP materials can be utilized as a base material in the framework of pavement sustainability, as its behavior under loading conditions are similar to virgin aggregate (VA) materials and can be simulated by using appropriate constitutive models for pavement design processes.

scholarly journals Desain Tebal Perkerasan Lentur Landas Pacu Bandara Soekarno-Hatta, Tanggerang Menggunakan Metode Design & Maintenance Guide 27, Inggris. (Hal. 38-46)

2018 ◽  
Vol 4 (2) ◽  
pp. 38
Author(s):  
Aldo Budi Prayoga ◽  
Silvia Sukirman
Keyword(s):  
Case Studies ◽  
Asphalt Binder ◽  
Base Material ◽  
High Strength ◽  
Flexible Pavement ◽  
Material Type ◽  
Base Course ◽  
Pavement Thickness

ABSTRAKPerkerasan merupakan salah satu komponen pada runway yang harus didesain dan dievaluasi agar dapat melayani lalu-lintas pesawat sehingga tidak menyebabkan kerusakan dan mengakibatkan terganggunya kinerja bandara. Studi kasus pada penelitian ini adalah mendesain tebal perkerasan lentur Runway 3 Bandara Soekarno-Hatta menggunakan Design & Maintenance Guide 27. Tiga alternatif repetisi beban berdasarkan jenis penerbangan yang diasumsikan yaitu alternatif 1 50% internasional dan domestik, alternatif 2 75% internasional dan 25% domestik dan alternatif 3 100% internasional. Dari hasil desain berdasarkan 3 alternatif repetisi beban didapatkan hasil tebal perkerasan yang sama, yaitu 40 mm Marshall Asphalt Surface Course, 60 mm Marshall Asphalt Binder Course, 120 mm Marshall Asphalt Base Course, 401 mm Type FH Drylean Concrete untuk tipe High Strength Bound Base Material dan 563 mm Type F Drylean Concrete untuk tipe Bound Base Material.Kata kunci: perkerasan lentur, runway, marshall asphalt, HSBBM, BBM ABSTRACT                                                                              Pavement is a component of runway that must be designed and evaluated in order to serve airplane traffic so that is not causing damage and result disruption of airport performance. The case studies in this research is to design 3rd Runway's flexible pavement of the Soekarno-Hatta airport use Design & Maintenance Guide 27 . 3 alternative load reps based on the assumed flight type ie alternative 1 with 50% international and domestic, alternative 2 75% international and 25% domestic and alternative 3 100% international. From the results of the design based on 3 alternative reps load obtained the same pavement thickness results, namely 40 mm Marshall Asphalt Surface Course, 60 mm Marshall Asphalt Binder Course, 120 mm Marshall Asphalt Base Course, 401 mm Type FH Drylean Concrete for High Strength Bound Base Material and 563 mm Type F Drylean Concrete for Bound Base Material type. Keywords: flexible pavement, runway, marshall aphalt, HSBBM, BBM

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