Peculiarities of the use of the cold recycling method for the restoration of asphalt concrete pavements

Bieliatynskyi, Аndrii; Yang, Shilin; Pershakov, Valerii; Shao, Meiyu; Ta, Mingyang

doi:10.1016/j.cscm.2022.e00872

Cited by 15 publications

(16 citation statements)

References 7 publications

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“…Pectous hydrated newly formed structures in cement are equalized (400 • C) by the 7th day of hydration, although the total loss by burning remains at a higher level in plain cement, and its evening out comes due by the age of 28 days. This is due to the interaction of ash with calcium hydroxide to form hydrated silicates, hydrated aluminates, and hydrated aluminum silicates [29]. It is possible that a change in the kinetics of crystallization of calcium hydrosulfoaluminate, which is a highly hydrated compound, can have a particular influence.…”

Section: Resultsmentioning

confidence: 99%

Development of building materials based on a high content of fly ash and polycondensation products from Chinese heat and power plants

Bieliatynskyi

Yang

Pershakov

et al. 2022

Materials Science-Poland

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The addition of fly ash from thermal power plants (TPP) and chemical additives, such as polycondensation products of acetone and formaldehyde, is an effective and economical method for increasing the strength and durability of building materials, in particular concrete. Fly ash added to the concrete and mortars at 10%–15% does not reduce their technical properties, while polycondensation products of acetone and formaldehyde plasticize and accelerate the hardening process of concrete. The study aims to substantiate the possibility of obtaining concrete on dense aggregates with a high content of fly ash through the use of polycondensation products of acetone and formaldehyde as additives, which are highly soluble in water and polyfunctional. The strength indicators were determined using standard methods. The study has shown quantitative changes in the properties of the fly ash-concrete mixture, improvement of its physical and technical characteristics, and durability of the fly ash concrete with the addition of polycondensation products of acetone and formaldehyde. In the present study, the authors determine the effect of fly ash addition on the properties of a concrete mixture, as well as the maximum possible content of fly ash that can be added to concrete to maximize certain properties required of the mixture; additionally, the same action is conducted with the addition of polycondensation products of acetone and formaldehyde concomitant with the addition of fly ash.

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Section: Resultsmentioning

confidence: 99%

Development of building materials based on a high content of fly ash and polycondensation products from Chinese heat and power plants

Bieliatynskyi

Yang

Pershakov

et al. 2022

Materials Science-Poland

Self Cite

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“…At the same time, the expediency of manufacturing and using distilled bitumen, obtained by vacuum distillation of heavy feedstock, seems to be quite rational [20]. However, during the manufacture of these mixtures, weather and climatic conditions, the characteristics of the feedstock (light and heavy oils), and the system for assessing the quality of bitumen were not always taken into account [25].…”

Section: Resultsmentioning

confidence: 99%

Investigation of the properties of cast asphalt concrete mixture with the addition of fiber from the fly ash of thermal power plants

Bieliatynskyi

Yang

Pershakov

et al. 2022

Materials Science-Poland

Self Cite

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The introduction of new road-building materials with advanced physical and mechanical properties is the trend in contemporary civil engineering, which aims to increase the quality of road surfaces. The use of cast asphalt concrete in the upper layers of road surfaces as a replacement for layers made of traditional fine-grained asphalt concrete will not only increase the pace of construction and repair, but also the durability and quality of the road pavement. However, this method requires operational and economic optimization. Using fiber from the fly ash of thermal power plants is one of the solutions for the design of cast asphalt concrete compositions. The aim of the work is to design the optimal composition of hot cast asphalt concrete and cold cast emulsion–mineral mixtures with the use of fiber from the fly ash of thermal power plants for the construction of thin-layer coatings of highways of all categories and values; to study their properties; and to determine the feasibility of their use as reinforcing and stabilizing additives. The method of GOST 11506, namely, “Method for determining the softening temperature of the ring and ball”, with the apparatus “Lintel KiSh-20m-4” was used during the experiments. The use of standard laboratory tests made it possible to analyze the quality indicators of the materials under study and design the optimal compositions of hot cast asphalt concrete, taking into account the delamination of the mixture and the criterion of decomposition, in addition to exploring the properties of the obtained material.

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“…The white and black series neutral value color card of Munsell color system are shown in figure 2. After calculating the tristimulus value by spectral data, the lightness value L * in CIE1976L * a * b * uniform color space is calculated by equation (5), and its relationship with Munsell Value V is approximately expressed by the equation (6) [41,42].…”

Section: K X Y K Y Z K Zmentioning

confidence: 99%

“…Asphalt pavement has been widely promoted due to its advantages of comfortable driving, low noise, less dust, clear color of traffic marks and improve the image of the city, and due to those advantages, more than 90% highways were paved with asphalt in China [1][2][3][4]. However, most asphalt pavements would suffer from different degrees of whitening caused by ageing of bitumen during their service life [5][6][7], the color of the pavement surface turns from black to grey [8][9][10]. The whitening of asphalt pavement causes the traffic marks to be blurred, which may lead to traffic accidents.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of asphalt ageing degree based on asphalt color

Wang

et al. 2023

Eng. Res. Express

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To understand the relationship between the surface color and ageing of asphalt, the evaluation method for asphalt surface color was established with the color parameter of Munsell Value, then two asphalts were adopted to study the influence of asphalt ageing on its surface color, and the mechanism of whitening was investigated by the four generic fractions experiment, color spectrum tests and scanning electron microscopy (SEM) test. The results show that the surface color of asphalt will be changed by some factors, while ageing is an important factor. The thermal-oxidative ageing (TOA) of asphalt would lead to the asphalt to be darker in color due to the component migration caused by ageing, while the ultraviolet ageing (UVA) of asphalt will result in a grey or white asphalt surface because of the fact that UVA makes the surface wrinkled and rough which would cause the asphalt surface to change from specular reflection to diffuse reflection. Since the whitening of asphalt surface caused by UVA is much more serious than the blacking caused by TOA, the asphalt pavement always tends to appear grey or white during its service life. To verify the close relationship between the surface color and UVA degree of asphalt, two modified asphalts with anti-ultraviolet ageing agents, carbon black and layered double hydroxides, were suffered from UVA, and their ageing degrees were assessed with the parameters of Munsell Value and conventional physical properties, results indicate the two evaluations on UVA degree have much consistency, which means it is feasible to adopt Munsell Value, a parameter of asphalt surface color, to evaluate the UV ageing degree of asphalt.

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Peculiarities of the use of the cold recycling method for the restoration of asphalt concrete pavements

Cited by 15 publications

References 7 publications

Development of building materials based on a high content of fly ash and polycondensation products from Chinese heat and power plants

Development of building materials based on a high content of fly ash and polycondensation products from Chinese heat and power plants

Investigation of the properties of cast asphalt concrete mixture with the addition of fiber from the fly ash of thermal power plants

Evaluation of asphalt ageing degree based on asphalt color

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