The current performance grade (PG) binder specification uses the parameter G*sin δ to quantify fatigue property, which has long been known be weakest part of specification. purpose this study was identify a better test. Six asphalt binders with variety modifiers were characterized using five tests, including δ, elastic recovery test, multiple stress creep (MSCR) linear amplitude sweep (LAS) and double edge notch tension (DENT) test in study. Additionally, push-pull mix employed verify these...

Currently, no satisfactory asphalt binder test method exists that can relate properties measured in the laboratory to fatigue performance service. The loss modulus of binder, G*sinδ, as proposed by Strategic Highway Research Program, is a rheological parameter measures energy dissipated within homogeneous at low strains under dynamic conditions. A number publications have reported this provides little correlation with susceptibility concrete fracture high nonlinear regime simulated...

This study evaluated a limited number, but well-controlled group of asphalt binders the same performance grade made with wide range recycled engine oil bottoms (REOB) contents; 0%, 2.5%, 6% and 15%. The most practical indicator possible presence considerable quantity REOB measureable changes to rheological characteristics was difference between bending beam rheometer (BBR) m-value temperature BBR S stiffness grade, ΔTcritical. When binder exhibited large ΔTcritical, it associated larger...

As the use of reclaimed asphalt pavement (RAP) in concrete mixtures increases, it is important to understand how addition already aged binders affects overall properties and performance mixture. In this study, four plant-produced containing 0%, 20%, 30%, 40% RAP were long-term oven laboratory three levels. Mixture testing included uniaxial complex modulus fatigue. Recovered binder grading (PG) rheological characterisation. The mixture showed that stiffen due ageing at a slower rate than...

Glass transition parameters can be used to study the miscibility, or lack of it, in polymer-modified asphalt binders. In this study, contribution thermodynamics mixing glass was quantitatively assessed a differential scanning calorimeter for four binders partially and fully replaced by an epoxy system. The values heat capacity (Cp) and, subsequently temperature (Tg) all were determined quantify miscibility based on entropic changes. Emphasis also given examining enthalpy as function system...

This paper documents and discusses an investigation into the time–temperature superposition principle as it relates to ductile failure in asphalt. Seven binders of approximately same low intermediate temperature varying high Superpave® grades were tested a dynamic shear rheometer (DSR) double-edge-notched tension test determine their rheological energy master curves. Master curves typically permit prediction properties at very long or short timescales from measurements higher lower...

The use of re-refined engine oil bottoms (REOBs) in asphalt pavements is a topic much debate because the aging susceptibility and quantity additive binder may affect field performance. In this study, four mixtures with varying REOB contents (up to 15%) were long-term oven aged by using high-temperature, short-duration method (135°C, 24 h) compared existing data on more conventional short-term oven-aging procedures. recovered binders underwent Superpave ® grading, double-edge notched tension,...

This study compared two loose mixes' long-term oven aging (LTOA) protocols (i.e., 5-day at 95°C and 8-hour 135°C) based on asphalt binder rheological chemical properties. The were then correlated with field conditions. Extracted recovered binders from four mixtures tested in the Dynamic Shear Rheometer (DSR), Bending Beam (BBR), Double-Edge-Notched-Tension (DENT) Test, Fourier Transform Infrared Spectroscopy by Attenuated Total Reflectance (FTIR-ATR). Based research results, mix protocol of...

A study was conducted on epoxy-modified asphalt (EMA) diluted with two binders of a different chemical structure, to understand the effect curing rates and long-term postcuring characteristics. Dynamic shear rheometer test results did not show clear trend time dosage percentage impact for base binders; parallel-plate geometry may be well-suited EMA because thermosetting properties curing. The binder (ABT) method used assess rheology short-term Analysis ABT data date suggests that source has...

The asphalt community is focused on the paradigm shift in mixture design from volumetrics to an optimization procedure based performance tests called balanced (BMD). Laboratory are being assessed for their relationship binder properties and field performance. However, existing BMD practice does not account long-term oven aging (LTOA). This gap limits appropriateness of thresholds potential improving pavement Federal Highway Administration’s Asphalt Materials Research Program has launched a...

This study examined rheological and failure-based approaches for the optimization of two bio-based petroleum-based recycling agents (RAs). The results showed that optimizing RAs based on performance grade (PG) approach did not fully achieve failure characteristics target asphalt binder. was observed both a RA. binder quality test (ABQT) Glover–Rowe (G-R) potential as surrogate methods estimating optimum dosage RAs, whereas double-edge notched tension (DENT) provided more cost-effective...

This study evaluated the cracking characteristics of asphalt materials containing RAP/RAS and prepared with WMA technology. Tests were performed in laboratory at a full-scale testing facility. Ten test lanes built FHWA’s Accelerated Loading Facility (ALF). The experimental design included three RAP percentages up to 44% by weight (40% recycled binder ratio, RBR), two technologies (water foaming chemical additive), one RAS percentage 20% RBR, different virgin binders (PG 58-28 PG 64- 22)....