The main focus of this study was to obtain plant produced Reclaimed Asphalt Pavement (RAP) mixtures, document the mixture production parameters and evaluate degree blending between virgin RAP binders. effect on performance (in terms stiffness, cracking, rutting, moisture susceptibility) workability mixtures evaluated. Eighteen were obtained from three locations in Northeast United States. contents (zero 40%) varied softer binders used. data analysis illustrated that is a function parameters....

As construction and remediation take place throughout New Jersey, the amount of demolition debris increases, while availability landfill space decreases. A viable solution for disposing these materials is to incorporate them into base subbase applications. An extensive laboratory program was conducted on two types debris: recycled concrete aggregate (RCA) asphalt pavement (RAP). These were compared with dense-graded coarse (DGABC), which currently being used in roadway applications Jersey....

One of the main benefits advertised about use warm-mix asphalt is increased workability at conventional and lower compaction temperatures. From a field perspective, “workability” commonly defined as mixture property that describes ease with which can be placed, worked by hand, compacted to desired mat density. Unfortunately, laboratory test condition have yet developed quantify these characteristics. A research effort evaluate compactability different additives preblended in polymer-modified...

The concept and use of warm-mix asphalt (WMA) is becoming more popular in the industry. promise reduced energy consumption, emissions, a workable product appealing to an industry pressured by environmentalists with sustainability agendas state agencies that apply pay adjustments on bases ride quality pavement density. WMA may come some potential issues, however. Lower production temperatures result softer because oxidative aging, while poorly dried aggregates create problem from moisture...

Recently, researchers have made effective use of Black Space diagrams to model stiffness and relaxation changes relating non-load-associated cracking. A Space-based approach detecting cracking susceptibility is the Glover–Rowe (G-R) parameter, which requires complex modulus phase angle at a particular temperature–frequency combination. This parameter being evaluated as replacement for low-temperature Superpave binder criteria. Primary objectives are validate G-R binders with laboratory field...

In recent years, there has been a growing interest in incorporating performance testing during the mixture design and quality control of asphalt mixtures. The move toward utilizing related specifications (PRS) balanced concepts have pushed need for to forefront. Numerous researchers proposed variety laboratory tests that showed promise at predicting performance, yet most these test methods are never adopted due number issues often cited by industry: (1) equipment cost; (2) equipment/test...

State departments of transportation are beginning to require the use higher percentages recycled asphalt pavement (RAP) in hot-mix asphalt. To help implement RAP contents, better procedures needed for evaluating binder properties content mixtures without chemical extraction. In particular, new and innovative methods required determine how addition influences mechanical composite (RAP + virgin) mixtures. A method is summarized determining what referred as effective stiffness blended with RAP....

In this paper, various nanomechanical and macromechanical techniques were used to study the effect of a reclaimed asphalt pavement (RAP) binder on microstructure properties virgin evaluate degree blending that occurs between those binders. To end, different atomic force microscopy (AFM) experiments (i.e., AFM tapping mode imaging, nanoindentation, spectroscopy experiments) conducted binder, recovered RAP their composite. addition, dynamic shear rheometer (DSR) tests evaluated binders,...

Abstract Pavement noise evaluations were conducted on 42 pavement surfaces in New Jersey using the Close Proximity Method (CPX) via NCAT Noise Trailer. The CPX is a current ISO Standard that measures sound levels of tire/pavement interface, thereby providing method to evaluate solely influence surface traffic noise. comprised both hot mix asphalt (HMA) and Portland cement concrete (PCC). HMA consisted dense-graded mixes (DGA), open-graded friction course (OGFC) with without crumb rubber,...

In this study, the fatigue performance of 12 plant-produced mixtures from New Hampshire and Vermont that contain reclaimed asphalt pavement (RAP) contents 0–40% by total weight mixture was evaluated. The tests included dynamic modulus, uniaxial fatigue, beam overlay tests. Also, simplified viscoelastic continuum damage (S-VECD) model failure criterion, called GR method, applied input to linear analysis for critical distresses (LVECD) programme predict behaviour tested on thin thick...

AbstractThe impact of reclaimed asphalt pavement (RAP) materials on performance is an important topic study in the industry due to environmental and cost benefits. The primary concern for increasing allowable RAP percentages hot mix relates presence aged materials, which may embrittle mixture decrease cracking resistance. Low-temperature a major distress cold temperature climates, such as Northeastern United States. Currently, there are several procedures analyse low-temperature binders...

The purpose of this study was to evaluate the effect density on fatigue cracking and rutting performance hot mix asphalt mixtures. Two plant produced Superpave mixtures, 9.5 12.5 mm, were utilised fabricate specimens target levels 88, 91, 94 97% theoretical maximum specific gravity. used mixture stiffness in test device, characteristics utilising beam overlay test-based analysis potential using pavement analyser flow number test. Additionally, mechanistic-empirical design guide (MEPDG)...

Many hot-mix asphalt plants store material in heated silos before it is ready to be transported construction sites. The time that stored the silo not controlled and varies widely, depending on several factors. As exposed elevated temperatures, short-term aging of binder may occur. Another important consideration interaction between reclaimed pavement (RAP) virgin binders, as blending or diffusion could occur binders. In this study, a 25% RAP mixture were sampled at incremental storage times...

This study evaluated the performance of reclaimed asphalt pavement (RAP) mixtures for (a) RAP percentage, (b) content, and (c) various base binders. All were produced in laboratory better control plant production variables. A simplified viscoelastic continuum damage model was used to evaluate fatigue properties mixtures, triaxial stress sweep (TSS) test rutting. In addition, layered critical distresses (LVECD) analysis predict resistance mixtures. To explain observed rutting behavior, binder...

In July 2007 the Massachusetts State Highway Department (Mass-Highway) began a pavement rehabilitation project involving placement of hot-mix asphalt (HMA) over section portland cement concrete (PCC) on Interstate 495. The consisted 50.8-mm (2-in.) thick leveling course, followed by 25.4-mm (1-in.) reflective crack relief interlayer (RCRI) and an overlay another intermediate course consisting dense-graded HMA mixture that was identical to course. Within approximately 2 months after...

Re-refined engine oil bottom (REOB), one of several products obtained from refining recovered oil, has been used in the asphalt industry since 1980s. Generally, REOBs are to help soften base binder and commonly 3% 10% by weight achieve desired low temperature properties. Recently, blame for poor cracking performance a number Canadian northern U.S. pavement sections laid on use REOBs. This issue prompted state agencies northeast United States ban its use, without necessarily understanding how...

In 2017, China passed the National Sword Policy that established a policy to no longer import plastic waste from other countries. Before imported approximately 45% of world’s plastic. The had significant impact on how U.S.A. and countries around world handled tremendous surplus waste. Research studies as late 1970s demonstrated may be utilized an asphalt modifier when properly dosed controlled, although limited recent data exists utilizing mixture design testing procedures today. A research...

A research effort consisting of both field and laboratory testing was undertaken to evaluate reflective crack relief interlayer (RCRI) mixes as a means mitigating cracking in composite pavements. Extensive that included falling weight deflectometer (FWD) weigh-in-motion (WIM) sensors used establish applied loads the resultant movements pavement structure. The were parameters for study. purpose program potential through bending expansion-contraction-type plant-produced asphalt different...

Because there is a greater emphasis on promoting sustainable materials within transportation infrastructure, state agencies in the U.S. Northeast are investigating different strategies that will enable use of higher percentages recycled asphalt pavement (RAP) while not sacrificing performance pavement. In particular, most concerned with fatigue and thermal cracking performance, as well general workability handling higher-RAP-content mixtures when used. conjunction Transportation Pooled Fund...

Truck traffic is one of the significant inputs in design and analysis pavement structures. This paper focuses on comprehensive cluster truck New Jersey for implementation mechanistic-empirical design. Multiple year data were collected from a large number weigh-in-motion stations across Jersey. Statistical was first conducted to analyze directional temporal (yearly) variations data. Hierarchical three optimum clusters found axle load spectra (single, tandem, tridem), vehicle class...

As a result of the ban on disposal contaminated dredged sediments in New York Bight, states and Jersey have embarked rigorous program seeking environmentally friendly solutions to handling material, including beneficial use stabilized material (SDM) roadway applications. A pilot study was initiated 1998 construct two embankments site Elizabeth, Jersey, where SDM successfully used as cover for more than 100 acres commercial development area. The included laboratory phase geotechnical...