01124159

Component

https://doi.org/10.3141/2095-13

http://scholar.google.com...noux&publication_year=2009

Active fillers in foamed asphalt mixes are added to modify the fine fraction of aggregate gradation or to reduce the moisture sensitivity of the mix. Some countries use cement as an active filler, and other countries use lime or fly ash, among other ingredients. However, limited information is available concerning the influence of different types of active fillers on the mechanical properties of foamed asphalt mixes. This paper presents the results of a project carried out to study the relative influence of active fillers on the mechanical properties of recycled mixes with foamed asphalt. Four active fillers were studied: portland cement, cement kiln dust, hydrated lime, and fly ash Class C. Indirect tensile strength, triaxial resilient modulus, and triaxial permanent deformation tests were carried out to quantify the influence of these active fillers on the properties of one particular full-depth reclamation material. Different curing methods and moisture conditioning were used to evaluate the role of active fillers after the mix production process. As a result of this study, it was concluded that, for the full-depth reclamation material tested, whereas some active fillers have an important influence on the mechanical properties and long-term performance of foamed asphalt mixes, others act only as mineral fillers of the aggregate gradation. Also, because foamed asphalt takes a long time to cure, some active fillers play an important role in contributing to the early strength of foam recycled mixes.

01145025

09-0248

English

pp 127-135

2009

Transportation Research Record: Journal of the Transportation Research Board

9780309126328

Print

Figures (5) ; Photos (6) ; References (21) ; Tables (4)

Aggregate gradation; Calcium hydroxide; Fillers (Materials); Fly ash; Foamed asphalt; Full-depth reclamation; Kiln dust; Mechanical properties; Modulus of resilience; Portland cement; Recycled materials; Rutting

Indirect tensile strength; Moisture sensitivity

Highways; Materials; Pavements; I31: Bituminous Binders and Materials

TRIS, TRB, ATRI

Jan 30 2009 4:32PM

• Calibration of Flexible Pavement in Mechanistic–Empirical Pavement Design Guide for Washington State
• Combined Effect of Moving Wheel Loading and Three-Dimensional Contact Stresses on Perpetual Pavement Responses
• Comparison of Georgia Department of Transportation Design Procedure with Mechanistic–Empirical Pavement Design
• Design of Tie Bars in Portland Cement Concrete Pavement Considering Nonlinear Temperature Variations
• Development of a Permanent Deformation Model of Asphalt Mixtures for South Korean Pavement Design Guide
• Effect of Axle Load Spectrum Characteristics on Flexible Pavement Performance
• Estimation of Truck Traffic Inputs for Mechanistic–Empirical Pavement Design in California
• Finite Element Model Analysis of Thermal Stresses of Thick Airport Concrete Pavement Slabs
• Full-Depth Reclamation with Engineered Emulsion in Fairburn, Georgia
• Laboratory and Finite Element Evaluation of Joint Lockup
• Methodology to Predict Alligator Fatigue Cracking Distress Based on Asphalt Concrete Dynamic Modulus
• Profile Analysis of Arizona Specific Pavement Studies 5 Project
• Quieter Hot-Mix Asphalt Pavements in Washington State
• Top-Down Cracking Predictions for Airfield Rigid Pavements