Polyacrylate Modified Binder for Sustainable Asphalt Pavement Performances Using Superpave Mix Design

2015 ◽  
Vol 747 ◽  
pp. 238-241
Author(s):  
Wan Adilah Ismail ◽  
Intan Rohani Endut ◽  
Sit Zaharah Ishak
Keyword(s):  
Material Selection ◽  
Asphalt Pavement ◽  
Asphalt Binder ◽  
Binder Content ◽  
Mix Design ◽  
Asphalt Binders ◽  
Air Voids ◽  
Modified Asphalt ◽  
Modified Asphalt Binder ◽  
Pavement Construction

Sustainable asphalt pavement is important in decreasing material costs by improving the existing material such as modified asphalt binders. It is also needed to provide a quality riding for road users. In achieving quality riding, the material selection and mix design must be correctly examined before using in pavement construction. Then, the aims of this study are to determine suitability of material selected by examining the aggregate properties and modified asphalt binder. In modified asphalt binder, 6% of polyacrylate polymer was added as an additive in 500g of binder content to dissolve. It was checked through Superpave gyratory compactor in determining air voids samples in term of height after compacted. The samples were mixed with different percentages of binder content; 5%, 5.5%, 6% and 6.5% to produce control and polyacrylate modified samples. 8 gyratory for Ninitialand 100 gyratory for Ndesignwere used in compaction of samples to determine air voids in term of height. The results show that 5.5% of binder content of polyacrylate modified samples has lower air voids compare than control samples. Thus, modified binders are able to minimize binder usage and save natural sources and also cost by improving bonding between mixtures to prevent pavement failure

Road Stress-Absorbing Interlayer Mix Design Method

2012 ◽  
Vol 490-495 ◽  
pp. 2540-2545
Author(s):  
Wen Yuan Xu ◽  
Chun Yao Deng ◽  
Hong Yu Yang
Keyword(s):  
Design Method ◽  
Asphalt Pavement ◽  
Asphalt Binder ◽  
Asphalt Mixture ◽  
Mix Design ◽  
Natural Sand ◽  
Modified Asphalt ◽  
Modified Asphalt Binder

The stress-absorbing interlayer of modified asphalt mixture studied in this report is a special asphalt pavement mixture. Capable of delaying the occurrence of reflection cracks, the asphalt mixture is mainly composed of aggregate passing through a 9.5 mm sieve, machine-made or natural sand, and modified asphalt binder.

scholarly journals Evaluating the Rheological, Chemical and Morphological Properties of SBS Modified Asphalt-Binder under Multiple Aging and Rejuvenation Cycles

2021 ◽  
Vol 11 (19) ◽  
pp. 9242
Author(s):  
Xiaobing Chen ◽  
Yunfeng Ning ◽  
Yongming Gu ◽  
Ronglong Zhao ◽  
Jinhu Tong ◽  
...  
Keyword(s):  
Asphalt Binder ◽  
Morphological Properties ◽  
Asphalt Binders ◽  
Laboratory Simulation ◽  
Fatigue Properties ◽  
Type I ◽  
Modified Asphalt ◽  
Modified Asphalt Binder ◽  
Microscopic Morphology ◽  
Sbs Modified Asphalt

To investigate the influence of multiple cycles of aging and rejuvenation on the rheological, chemical, and morphological properties of styrene–butadiene–styrene (SBS)-modified asphalt-binders, the asphalt-binders were aged using two laboratory simulation methods, namely a rolling thin film oven (RTFO) test for short-term aging and pressure aging vessel (PAV) for long-term aging. The asphalt-binders were then rejuvenated with three types of rejuvenators (Type I, II, and III) with different dosages (i.e., 6%, 10%, and 14% for the first, second, and third rejuvenation, respectively). A dynamic shear rheometer (DSR) was then used to analyze the effect of rejuvenators on the rheological properties of all the asphalt-binders. The changes in the functional groups and microscopic morphology in the process of multiple aging and rejuvenation cycles were studied using Fourier transform infrared (FTIR) and atomic force microscopy (AFM). The results indicated that the three rejuvenators could soften the stiffness and restore the microstructures of the aged asphalt-binders in the process of repeated aging and rejuvenation from DSR and AFM testing. Considering the rutting and fatigue properties, the Type I rejuvenator exhibited the potential to achieve the desired rejuvenation effects under multiple rejuvenation cycles. During the multiple aging and rejuvenation cycles, the aging resistance of SBSMA decreased gradually from the FTIR results. This inherently limited the number of repeated rejuvenation cycles. This research is conducive to promoting the application of repeated penetrating rejuvenation.

scholarly journals Evaluation of Selected Performance Properties of Nanoclay-Modified Asphalt Binders

2019 ◽  
Vol 271 ◽  
pp. 03006
Author(s):  
Mohammad N. Hassan ◽  
M M Tariq Morshed ◽  
Zahid Hossain
Keyword(s):  
Colloidal Stability ◽  
Asphalt Binder ◽  
Weather Conditions ◽  
Good Alternative ◽  
Asphalt Binders ◽  
Chemical Compositions ◽  
Modified Asphalt ◽  
Adverse Weather ◽  
Modified Asphalt Binder ◽  
Improved Performance

Asphalt binders are often modified with additives such as acid, polymer, or a combination of multiple additives to achieve improved performance to sustain heavy loads and adverse weather conditions. According to some previous researches, nanoclay can be a good alternative of currently practiced Styrene-Butadiene-Styrene (SBS) modification, and the former is expected to reduce the overall cost of the asphalt binder. Three types of nanoclay (Cloisite 10A, 11B, and 15A) were blended with asphalt binders prepared from two different sources (Arabian Crude and Canadian Crude). A blending protocol has been developed to blend nanoclay with the base binders. Mechanical properties including viscosity, rutting parameter have undergone significant changes after the nanoclay modification. It was also observed that nanoclay modified binders offer different moisture susceptibility while bonding with different aggregates; the nanoclay modified asphalt binder exhibits better bonding with gravel than sandstone. Mechanistic properties such as viscosity and rutting parameter are found to be highly correlated with the chemical compositions. Binders from the Canadian crude showed more colloidal stability than binders from the Arabian crude after nanoclay modification.

scholarly journals Cellulose Microfibril and Micronized Rubber Modified Asphalt Binder

Fibers ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 25
Author(s):  
Ang Li ◽  
Abdu A. Danladi ◽  
Rahul Vallabh ◽  
Mohammed K. Yakubu ◽  
Umar Ishiaku ◽  
...  
Keyword(s):  
Linear Regression Analysis ◽  
Asphalt Binder ◽  
Cost Effective ◽  
Cellulose Microfibrils ◽  
Asphalt Binders ◽  
Asphalt Emulsion ◽  
Clear Trend ◽  
Modified Asphalt ◽  
Weight Content ◽  
Modified Asphalt Binder

Cellulose microfibrils (CMFs) and micronized rubber powder (MRP) can be derived from low or negative-cost agricultural/industrial waste streams and offer environment-friendly and cost-effective pathways to develop engineering products. This study investigated the efficacy of adding these micromodifiers on the performance characteristics of asphalt binders. In this work, samples were produced using a mixture of slow-setting anionic asphalt emulsion with various combinations of MRP (at 0, 2 and 10 wt %) and four types of CMFs (hydrophobic and hydrophilic with crystalline ratios of 86% and 95%) at 0, 2 and 5 wt %. The performance of modified asphalt samples was assessed by penetration depth (PD), softening point (SP), and penetration index (PI). Linear regression analysis showed that adding CMFs and/or MRP reduced PD and increased SP values. The type of CMFs significantly affected the performance, which becomes more distinct with the increased weight content of CMFs. While hydrophilic CMFs caused increases in SP and PI values, no clear trend was seen to determine the effect of CMF crystallinity. It was also discovered that the combined addition of CMF and MRP achieved similar PI values at lower total weight content compared to using MRP alone.

Highly Modified Asphalt Binder for Asphalt Crack Relief Mix

2017 ◽  
Vol 2630 (1) ◽  
pp. 110-117 ◽  
Author(s):  
Matheus S. Gaspar ◽  
Kamilla L. Vasconcelos ◽  
Amanda H. M. da Silva ◽  
Liedi L. B. Bernucci
Keyword(s):  
Hot Mix Asphalt ◽  
Asphalt Binder ◽  
Asphalt Mixture ◽  
Bending Test ◽  
Asphalt Binders ◽  
Reflective Cracking ◽  
Modified Asphalt ◽  
Asphalt Overlay ◽  
Modified Asphalt Binder ◽  
Styrene Butadiene

Reflective cracking is a common issue with respect to rehabilitated asphalt pavements, especially when the rehabilitation is done by applying a hot-mix asphalt overlay on the existing damaged pavement. Several approaches can be adopted to delay reflective cracking. They include an increase of the overlay thickness and the use of a stress relief asphalt mixture (SRAM), which is a fine-graded, flexible, and thin asphalt interlayer. Because the efficiency of a SRAM is highly related to the properties of the asphalt binder used in the mixture, it is of interest to use a highly modified asphalt (HiMA) binder. This paper describes a field test comprising three sections at BR-116 (a heavily trafficked highway in Brazil). One of the rehabilitation strategies used for a cracked asphalt pavement was a 2.5-cm SRAM (produced with a HiMA binder) and 5-cm styrene–butadiene–styrene (SBS) hot-mix asphalt (HMA). The other two strategies were to apply SBS HMA overlays of different thicknesses (7.5 cm and 10.5 cm). The aim was to evaluate and compare the capability of these solutions to control reflective cracking. Rheological properties and multiple stress creep and recovery tests were performed on the asphalt binders, and the semicircular bending test was performed on the asphalt mixtures. The surface conditions were monitored, and the results for each section were compared. After a 29-month period, the section that received the interlayer had the lowest cracked area and showed better resistance than the overlays did to reflective cracking and better maintenance of the original thickness of the pavement.

Preparation and Properties of Ageing Resistant Asphalt Binder with Various Anti-Ageing Additives

2011 ◽  
Vol 71-78 ◽  
pp. 1062-1067 ◽  
Author(s):  
Zhen Gang Feng ◽  
Jian Ying Yu ◽  
Heng Long Zhang ◽  
Dong Liang Kuang
Keyword(s):  
Synergistic Effect ◽  
Softening Point ◽  
Asphalt Binder ◽  
Asphalt Binders ◽  
Modified Asphalt ◽  
Uv Absorber ◽  
Modified Asphalt Binder ◽  
Uv Absorbers ◽  
Compound Modification ◽  
Oxidative Ageing

The modified asphalt binders with various anti-ageing additives, including ultraviolet (UV) absorber, antioxidant and combination of them, were prepared, and the effects of UV absorber contents, antioxidant contents and combination of UV absorber and antioxidant on physical properties and ageing characteristics of the asphalt binder were investigated. Results show that the ductility of asphalt binder increases whereas the softening point and viscosity decrease with addition of anti-ageing additives. UV absorbers and antioxidants exhibit different influences on the ageing properties of asphalt binder. The thermal- and photo-oxidative ageing performance of asphalt binder can be simultaneously improved by the compound modification with UV absorber and antioxidant. The combination of UV326 and antioxidant 1010 shows synergistic effect in preventing the asphalt binder from thermal- and photo-oxidative ageing, which contributes to excellent ageing resistance of modified asphalt binder.

Nonlinear Viscoelastic Response of Crumb Rubber Modified Asphalt Binder Under Large Strains

2020 ◽  
Vol 2674 (3) ◽  
pp. 139-149
Author(s):  
Saqib Gulzar ◽  
B. Shane Underwood
Keyword(s):  
Asphalt Binder ◽  
Crumb Rubber ◽  
Oscillatory Shear ◽  
Asphalt Binders ◽  
Large Strains ◽  
Viscoelastic Response ◽  
Modified Asphalt ◽  
Nonlinear Viscoelastic ◽  
Modified Asphalt Binder ◽  
Polymer Modified Asphalt

Agencies have been increasing their use of polymer modified asphalt binders in recent years to address performance issues and lengthen the useful life of their pavements. When deployed these materials likely experience strain levels exceeding their linear viscoelastic (LVE) limits. The same situation exists in non-polymer modified asphalt binders as well, but the effect may be more pronounced in polymer modified systems because of their bi-phasic nature. In this study, terminally blended crumb rubber (CR-TB) modified asphalt is studied to understand and quantify the nonlinear viscoelastic response under large strains. The CR-TB binders are extensively used in pavements subjected to high vehicular loads and extreme climatic conditions; thereby, their response under large strains becomes more critical. The current standard characterization techniques are based on LVE response using small amplitude oscillatory shear rheology only and do not consider the behavior of binders under large strains. In this study, large amplitude oscillatory shear (LAOS) rheology is used as a framework to more thoroughly investigate the complete response of the CR-TB modified asphalt binder under large strains at 30°C, 40°C, 50°C, and 60°C and at the frequencies of 0.5, 1, and 5 Hz. The LAOS response is analyzed using Fourier-transform rheology and the orthogonal stress decomposition method involving Chebyshev polynomial representation. It is found that nonlinearity manifests greatly in this study material as strain levels increase and frequencies decrease. The relative nonlinearity increases with increasing strain amplitude and is more significant towards lower end of the tested temperature range. The CR-TB binder shows strain-stiffening/softening and shear-thinning/thickening behavior depending upon a specific temperature, strain level, and frequency.

Feasibility of Crumb Rubber Use for Asphalt Pavement Construction

1996 ◽  
Vol 1530 (1) ◽  
pp. 64-71
Author(s):  
Raghu Ram Madapati ◽  
K. Wayne Lee ◽  
Francis J. Manning ◽  
Colin A. Franco
Keyword(s):  
Rhode Island ◽  
Asphalt Pavement ◽  
Crumb Rubber ◽  
Binder Content ◽  
Mix Design ◽  
Dry Process ◽  
Wet Process ◽  
Level I ◽  
Pavement Construction ◽  
And Control

There are two processes of adding crumb rubber modifier (CRM) to hot mix asphalt (HMA), that is, the wet process and the dry process; and different technologies are available for each process. On the basis of the results of the binder study and producer's practices, HMA specimens were prepared using two selected AR binders with Producer R and A CRMs for Rhode Island (RI) dense-graded and dense-graded friction course (DGFC) mixtures, respectively. Aggregates procured from four local asphalt contractors were used. In addition, gap-graded HMA specimens were prepared with 3 percent CRM and control AC-20 binder with two typical local aggregates using the dry process. Marshall mix design was performed on all mixtures to determine optimum binder content and Marshall properties. Mechanical properties were evaluated for the mixtures with and without CRM. Superpave Level I mix design was also performed for dense-graded, DGFC, and gap-graded mixtures with aggregates procured from Contractor C. Finally, the performance of pavements with and without CRM was predicted using the computer program VESYS. Results of this study indicated that the use of CRM is feasible for RI dense-graded and DGFC mixtures utilizing the wet process.

Laboratory Evaluation of Mixture Type on Highly Modified Asphalt Mixtures in Virginia

2018 ◽  
Vol 2672 (28) ◽  
pp. 59-68
Author(s):  
Benjamin F. Bowers
Keyword(s):  
Asphalt Binder ◽  
Aggregate Size ◽  
Asphalt Mixtures ◽  
Laboratory Evaluation ◽  
Maximum Aggregate Size ◽  
Air Voids ◽  
Modified Asphalt ◽  
Modified Asphalt Binder ◽  
Dynamic Modulus Test ◽  
Scb Specimen

The work presented attempts to address reflective cracking of asphalt-surfaced pavements through binder modification with a highly polymer (HP)-modified asphalt binder. Nine asphalt mixtures ranging from fine dense-graded mixtures to stone matrix asphalt (SMA) mixtures were investigated with conventional polymer modified binders and HP binder. The dynamic modulus test, overlay test (OT), and semi-circular bend (SCB) test were used to evaluate the mixtures. In the cracking tests, HP mixtures outperformed the conventionally modified control mixtures for the same mixture type. For HP mixtures, in general, SMA mixtures performed better in the cracking test than dense-graded mixtures. One of the dense-graded mixtures having larger nominal maximum aggregate size (NMAS) performed better than the mixture with a smaller NMAS, whereas the other having a larger NMAS was not significantly different in crack testing. Further, a discussion on the calculation of bulk specific gravity and percent air voids in a cut OT and SCB specimen using saturated surface dry or vacuum sealing methods is presented.

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