Multidimensional analysis of foaming process impact on 50/70 bitumen ageing

Iwański, Marek; Mazurek, Grzegorz; Buczyński, Przemysław; Zapała-Sławeta, Justyna

doi:10.1016/j.conbuildmat.2020.121231

Cited by 20 publications

(14 citation statements)

References 24 publications

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“…The type of binder had a significant impact on the compaction properties of the tested mixes, which resulted in obtaining different values of mechanical parameters. The obtained results confirmed the possibility of applying cold recycled mixes with foamed asphalt to the layers of pavement structures [ 32 ].…”

Section: Introductionsupporting

confidence: 71%

Research on the Properties of Mineral–Cement Emulsion Mixtures Using Recycled Road Pavement Materials

2021

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The reduction in natural resources and aspects of environmental protection necessitate alternative uses of waste materials in the area of construction. Recycling is also observed in road construction where mineral–cement emulsion (MCE) mixtures are applied. The MCE mix is a conglomerate that can be used to make the base layer in road pavement structures. MCE mixes contain reclaimed asphalt from old, degraded road surfaces, aggregate improving the gradation, asphalt emulsion, and cement as a binder. The use of these ingredients, especially cement, can cause shrinkage and cracks in road layers. The article presents selected issues related to the problem of cracking in MCE mixtures. The authors of the study focused on reducing the cracking phenomenon in MCE mixes by using an innovative cement binder with recycled materials. The innovative cement binder based on dusty by-products from cement plants also contributes to the optimization of the recycling process in road surfaces. The research was carried out in the field of stiffness, fatigue life, crack resistance, and shrinkage analysis of mineral–cement emulsion mixes. It was found that it was possible to reduce the stiffness and the cracking in MCE mixes. The use of innovative binders will positively affect the durability of road pavements.

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Section: Introductionsupporting

confidence: 71%

Research on the Properties of Mineral–Cement Emulsion Mixtures Using Recycled Road Pavement Materials

2021

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“…Alterations of bitumen chemical composition and morphology due to ageing can be successfully observed using Atomic Force Microscopy (AFM) [ 33 , 34 ] and ATR spectroscopy. Such changes were demonstrated in the study reported by Iwański et al [ 30 ]. Their findings were consistent with the test results presented by Dong et al [ 35 ].…”

Section: Introductionsupporting

confidence: 63%

“…Compared with conventional technology, low production temperature of HWMA and WMA with and without foamed bitumen alleviates the negative impact of high temperature on the bitumen [ 12 , 13 ], reduces the rate of its ageing [ 27 , 28 , 29 ], and generates smaller changes in binder parameters and mixture properties [ 30 , 31 , 32 ]…”

Section: Introductionmentioning

confidence: 99%

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Effects of the Water-Based Foaming Process on the Basic and Rheological Properties of Bitumen 70/100

et al. 2021

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The process of water-based foaming of bitumen produces binders that can be incorporated in cold recycled asphalt mixes and pavement upper structural layers made of half-warm mix asphalt prepared at 100–130 °C. During the foaming process, cold water and air act on hot bitumen (160–170 °C), which results in the explosive vaporization of water leading to changes in the binder structure. The impact of foaming on the properties of bitumen 70/100 was evaluated by investigating the binder characteristics before and after foaming. Determination of two foaming parameters, maximum expansion and half-life, was followed by measurements of penetration at 25 °C, softening point, Fraass breaking point, and dynamic viscosity at 60, 90, and 135 °C. Rheological and low-temperature tests were also performed before and after foaming bitumen 70/100. The Bending Beam Rheometer method was applied to determine the low temperature stiffness modulus. A DHR-2 rheometer was used to determine the dynamic modulus and phase angle of the tested binder. The Black and master curves before and after foaming were plotted in the 2S2P1D model and the model parameters were analysed. Analysis of the test results confirmed the effects of the foaming process on the basic, low-temperature, and rheological characteristics of the bitumen.

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“…Huang et al [31], in their neutron scattering experiments, found no microstructural changes in bitumen subjected to foaming. Some other studies [32][33][34][35] on the other hand, have shown significant effects of foaming on the high-and low-temperature properties of paving grade and polymer modified bitumen.…”

Section: Introductionmentioning

confidence: 99%

Foaming Performance and FTIR Spectrometric Analysis of Foamed Bituminous Binders Intended for Surface Courses

Maciejewski

Chomicz-Kowalska

2021

Materials

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This study explores the effects of foaming on three selected bituminous binders: 50/70 paving grade bitumen, 45/80-55 polymer modified bitumen and 45/80-80 HiMA binder. The first part of the investigations included the evaluation of the foaming performance in terms of foaming temperature and foaming water content with the utilization of desirability functions and based on the equality of maximum expansion ratio and bitumen foam half-life. The second part of the study investigated the effects of foaming on the chemical structure of the binders using Fourier-transform infrared spectroscopy. The results of the spectroscopic measurements permitted calculation of structural indices specific to functional groups associated with bitumen oxidation, as well as those indicative of elastomeric modification. The results have shown that the different types of bitumen exhibited different foaming characteristics, which was most evident in bitumen foam half-lives, with the HiMA binder performing the best. The spectrometric measurements did not show any significant effects of foaming on the chemical structure of the evaluated binders related to oxidative stress, neither were any major changes in the PmB-specific regions found.

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Multidimensional analysis of foaming process impact on 50/70 bitumen ageing

Cited by 20 publications

References 24 publications

Research on the Properties of Mineral–Cement Emulsion Mixtures Using Recycled Road Pavement Materials

Research on the Properties of Mineral–Cement Emulsion Mixtures Using Recycled Road Pavement Materials

Effects of the Water-Based Foaming Process on the Basic and Rheological Properties of Bitumen 70/100

Foaming Performance and FTIR Spectrometric Analysis of Foamed Bituminous Binders Intended for Surface Courses

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