A comprehensive review of warm mix asphalt mixtures-laboratory to field

Sukhija, Mayank; Saboo, Nikhil

doi:10.1016/j.conbuildmat.2020.121781

Cited by 95 publications

(36 citation statements)

References 232 publications

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“…Numerous studies have addressed it by quantifying water sensitivity, some use mixture properties [8][9][10][11], while others use aggregates-bitumen interface properties [12][13][14]. There are different methods that can be used to reduce the viscosity of the bitumen at lower temperatures [15]: foamed methods, organic additives and waxes, and chemical additives, and consequently water sensitivity depends on it [16]. In addition, it is important to evaluate the ageing effect on it [17].…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of the Performance of a Warm Mix Asphalt (WMA) Considering Aged and Unaged Specimens

et al. 2020

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In the last decades, all technology production sectors reached a high level of development, without neglecting the attention to environmental aspects and safeguarding energy resources. Moreover, in the sector of pavement industry, some alternatives of bituminous mixtures were proposed to reduce the greenhouse gas emissions. One of these is the warm mix asphalt (WMA), a mixture produced and compacted at lower temperatures compared to traditional hot mix asphalt (HMA) (about 40 °C less), to allow a reduction of emissions into the atmosphere and the costs. Other operative benefits concern the health of workers during the whole road construction process, the reduction of distances to which the mixture can be transported, and therefore also the positioning of the plants. However, it is not all benefits, since reduced production temperatures can bring short- and long-term water sensitivity issues, which could threaten the pavement performance. This paper evaluated the performance (water sensitivity, stiffness, fatigue, and permanent deformation) of a WMA produced using a warm mix fabrication bitumen and compared it with an HMA tested in parallel. In general, except for the resistance to permanent deformation, the WMA presented performances comparable to HMA. Regarding the fatigue behavior of asphalt mixtures, the WMA was less affected by ageing conditions, despite it showing lower performance than HMA.

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Section: Introductionmentioning

confidence: 99%

“…In foamed methods, additional additives (such as antistripping agents) are sometimes used to improve coating [18]. The other two methods usually do not require those antistripping agents [16].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Performance of a Warm Mix Asphalt (WMA) Considering Aged and Unaged Specimens

et al. 2020

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“…In the asphalt pavement industry, the warm mix asphalt (WMA) has been introduced and used instead of the hot mix asphalt (HMA) to reduce the temperatures of mixture production and placement. This has led to reductions in fuel consumption and noxious gas emissions, which are particularly welcomed in urban environments [1][2][3][4]. A variety of asphalt binders and mixture additives are available to produce WMA mixtures among which wax-based additives are common types.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Wax-Based Warm Mixture Additives from Waste Polypropylene (PP) Plastic and Their Effects on the Properties of Modified Asphalt

Zhou

Li²,

Wang³

et al. 2022

Materials

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The production of high-performance, low-cost warm mix additives (WMa) for matrix asphalt remains a challenge. The pyrolysis method was employed to prepare wax-based WMa using waste polypropylene plastic (WPP) as the raw material in this study. Penetration, softening point, ductility, rotational viscosity, and dynamic shear rheological tests were performed to determine the physical and rheological properties of the modified asphalt. The adhesion properties were characterized using the surface free energy (SFE) method. We proved that the pyrolysis temperature and pressure play a synergistic role in the production of wax-based WMa from WPPs. The product prepared at 380 °C and 1.0 MPa (380-1.0) can improve the penetration of matrix asphalt by 61% and reduce the viscosity (135 °C) of matrix asphalt by 48.6%. Furthermore, the modified asphalt shows favorable elasticity, rutting resistance, and adhesion properties; thus, it serves as a promising WMa for asphalt binders.

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“…Hence, asphalt is widely used in road construction around the world. Asphalt pavements are mostly made with hot mix asphalt (HMA) produced in a stationary or mobile plant, using high temperatures during production, mixing of the binder with the aggregate, and compaction of the mixture to produce the finished driving surface . The production of HMA consumes a significant amount of energy and emits harmful gases, causing environmental pollution and potential health issues for workers around the plant and paving crews .…”

Section: Introductionmentioning

confidence: 99%

Balancing the Use of Wax-Based Warm Mix Additives for Improved Asphalt Compaction with Long-Term Pavement Performance

Ding

Hesp

2021

ACS Sustainable Chem. Eng.

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Using wax-based warm mix additives allows contractors to lower production and compaction temperatures of asphalt, thereby reducing greenhouse and other harmful gas emissions in pavement construction. However, excessive wax can adversely affect the long-term durability of the pavement. In order to quantify solid wax, the effects of selected commercial additives on spectral and thermal properties of asphalt binder were studied by variable-temperature Fourier-transform infrared spectroscopy (VT-FTIR) and differential scanning calorimetry (DSC). The VT-FTIR reduced spectral area versus temperature plots for waxdoped asphalt binder were found to have three distinct parts from which solid wax contents could be determined. The wax precipitation temperature (WPT), obtained from DSC measurements of heat flow during cooling, was found to increase with additive content. In contrast, the wax melting out temperature (WMT), determined upon heating, appears to be independent of the additive content.

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A comprehensive review of warm mix asphalt mixtures-laboratory to field

Cited by 95 publications

References 232 publications

Evaluation of the Performance of a Warm Mix Asphalt (WMA) Considering Aged and Unaged Specimens

Evaluation of the Performance of a Warm Mix Asphalt (WMA) Considering Aged and Unaged Specimens

Preparation of Wax-Based Warm Mixture Additives from Waste Polypropylene (PP) Plastic and Their Effects on the Properties of Modified Asphalt

Balancing the Use of Wax-Based Warm Mix Additives for Improved Asphalt Compaction with Long-Term Pavement Performance

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