A Laboratory Evaluation of Recycled Tire Rubber in Hot-Mix Asphalt Paving Systems

2009 ◽  
pp. 69-69-15 ◽  
Author(s):  
KR Hansen ◽  
G Anderton
Keyword(s):  
Hot Mix Asphalt ◽  
Laboratory Evaluation ◽  
Tire Rubber ◽  
Asphalt Paving

scholarly journals Preparation and characterisation of modified reclaimed asphalt using nanoemulsion acrylate terpolymer

2019 ◽  
Vol 48 (5) ◽  
pp. 363-374 ◽  
Author(s):  
Abdelrahman Moukhtar Naser ◽  
Hamada Abd El - Wahab ◽  
Mohamed Abd El Fattah Moustafa El Nady ◽  
Abdelzaher E.A. Mostafa ◽  
Long Lin ◽  
...  
Keyword(s):  
Hot Mix Asphalt ◽  
Fourier Transforms ◽  
Thermo Gravimetric Analysis ◽  
Thermoplastic Elastomer ◽  
Warm Mix Asphalt ◽  
Gravimetric Analysis ◽  
Content Type ◽  
Reclaimed Asphalt ◽  
Asphalt Paving ◽  
Modified Binder

Purpose This paper aims to investigate the best methods of utilisation of reclaimed asphalt pavements (RAP) in Egypt, to determine the effect of using 100% RAP instead of using virgin aggregates and asphalt; investigate the effect of thermoplastic elastomer polymer as asphalt modifier; and also improve the mechanical and physical characteristics and consequently improving the quality of asphalt paving, increasing service life of asphalt-paving and reducing costs. Design/methodology/approach Nano acrylate terpolymers were prepared with different % (Wt.) of and were characterised by Fourier transforms infrared (FTIR), for molecular weight (Mw), by thermo gravimetric analysis (TGA) and by transmission electron microscopy (TEM). A 4% (Wt.) of the prepared nanoemulsion terpolymer was mixed with virgin asphalt as a polymer modifier, to improve and reuse of the RAP. The modified binder was tested. The tests conducted include penetration, kinematic viscosity, softening point and specific gravity. Application of Marshall mix design types; hot mix asphalt (HMA), warm mix asphalt (WMA) and cold in place recycled (CIR). Four different mix designs used; control mix contained virgin asphalt by HMA, and the other three mix designs were polymermodified asphalt sample by HMA, WMA and CIR. Findings The research results showed that using 4 Wt.% of the prepared nanoemulsion terpolymer to produce hot mix asphalt (HMA) and warm mix asphalt (WMA) achieved higher stability compared to the control mix and cold in place recycled (CIR). Research limitations/implications This paper discusses the preparation and the characterisation of nanoemulsion and its application in RAPs to enhance and improve the RAP quality. Practical implications Nano-acrylate terpolymer can be used as a new polymer to modify asphalt to achieve the required specifications for RAP. Originality/value According to the most recent surveys, Europe produced 265 tonnes of asphalt for road applications in 2014, while the amount of available RAP was more than 50 tonnes. The use of RAP in new blended mixes reduces the need of neat asphalt, making RAP recycling economically attractive.

Laboratory evaluation of electromagnetic density gauges for hot-mix asphalt mixture density measurement

2018 ◽  
Vol 158 ◽  
pp. 1055-1064 ◽  
Author(s):  
Zhen Leng ◽  
Zeyu Zhang ◽  
Yuan Zhang ◽  
Yangyang Wang ◽  
Huayang Yu ◽  
...  
Keyword(s):  
Hot Mix Asphalt ◽  
Asphalt Mixture ◽  
Density Measurement ◽  
Laboratory Evaluation ◽  
Mixture Density

Survey of State Practices to Control Skid Resistance on Hot-Mix Asphalt Concrete Pavements

1996 ◽  
Vol 1536 (1) ◽  
pp. 52-58 ◽  
Author(s):  
P. W. Jayawickrama ◽  
R. Prasanna ◽  
S. P. Senadheera
Keyword(s):  
Asphalt Concrete ◽  
Hot Mix Asphalt ◽  
Design Guidelines ◽  
State Agency ◽  
Laboratory Evaluation ◽  
Insoluble Residue ◽  
Petrographic Analysis ◽  
Skid Resistance ◽  
Concrete Pavements ◽  
Design Procedures

A nationwide survey on design methods for achieving adequate skid resistance on hot-mix asphalt concrete pavements was conducted. Information was collected on the design practices used by 48 state departments of transportation (DOTs) in the contiguous United States. Survey findings show that the emphasis placed on the skid resistance aspects in various state DOT design procedures vary considerably. Based on the data collected, 21 out of 48 state highway agencies either do not have any design guidelines specifically addressing pavement skid behavior or assume that adequate skid resistance may be ensured through proper mix design. The general approach used by these agencies involves frequent monitoring of pavements to identify pavements with skid-related problems so that appropriate action may be taken. Survey findings indicated that state DOTs that consider skid resistance in their design procedures emphasize controlling the quality of coarse aggregates used in pavement surface course construction. The procedures used for aggregate qualification, however, vary significantly from one state agency to another. Some state DOTs rely on simple aggregate classification methods based on aggregate type, whereas others perform detailed laboratory evaluation. The laboratory test procedures that are most commonly used in evaluating aggregate frictional properties are the polish value test, acid insoluble residue test, and petrographic analysis. In addition to laboratory testing, Florida, Kentucky, Pennsylvania, and Texas use alternative procedures to qualify aggregates based on their field skid performance.

Laboratory evaluation of the effect of bentonite on performance of bitumen and hot mix asphalt mixtures

2016 ◽  
Vol 34 (1) ◽  
pp. 19-23 ◽  
Author(s):  
Alireza Ameli ◽  
Rezvan Babagoli ◽  
Seyed Erfan Tabatabaei Razi
Keyword(s):  
Hot Mix Asphalt ◽  
Asphalt Mixtures ◽  
Laboratory Evaluation

scholarly journals Laboratory Evaluation of Ground Tire Rubber in Stone Mastic Asphalt

2004 ◽  
Vol 1 (1) ◽  
pp. 53
Author(s):  
R. Muniandy ◽  
A. A. Selim ◽  
S. Hassim ◽  
H. Omar
Keyword(s):  
Laboratory Evaluation ◽  
Strength Ratio ◽  
Tire Rubber ◽  
Ground Tire Rubber ◽  
Asphalt Cement ◽  
Mastic Asphalt ◽  
Truck Tires ◽  
Dynamic Creep ◽  
The World ◽  
Stone Mastic Asphalt

Stone mastic asphalt (SMA) is a gap-graded mix whereby stiffer asphalt cement is required to bind the stone matrix or arrangement of stones together. Although various asphalt additives are traditionally available, the use of rubber crumbs in SMA is still a new rresearch endeavor. Many countries around the world are facing serious problems on what to do with reject or discarded tires. In the present study, commercial truck tires, containing 70% natural rubber, were ground and pre-blended in 80-100 penetration asphalt for use in SMA mixtures. An assessment was made of the laboratory performance of rubberized SMA in terms of stability, resilent modulus, dynamic creep and tensile strength ratio. It was observed that the performance of SMA with ground tire rubber was for superior as compared to SMA mix with unmodified asphalt. Sulfur and Styrene Butadeline Rubber (SBR) were used in rubberized SMA mixes as additives to test the sensitivity of SMA mixtures. As standard practice a 0.3% newly developed cellulose oil palm fiber was used in SMA to minimize the asphalt drain-down effects. 

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