Etchable iron content (FETCH) proposed as the missing parameter for the better prediction of asphalt mastic stiffening

Makowska, Michalina; Pellinen, Terhi

doi:10.1016/j.conbuildmat.2015.05.099

Cited by 3 publications

(3 citation statements)

References 25 publications

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“…The penetration reduced by approximately 45% and the softening point increased by 8-13 ºC. Filler G had a greater effect than filler L on the softening point, which as referred before is related to the higher Rigden voids of G. These values fall in the range of values reported in the literature [24,27,50], and using the well-known PRADO model developed in Belgium [27] it would be predicted 7 ºC and 11 ºC for fillers L and G, respectively. In addition, the effect of the bitumen was not meaningful (1 ºC variation) which is in line with the results of the absorbing test reported before in section 3.1.…”

Section: Consistency At Intermediate and High Temperaturessupporting

confidence: 64%

“…The filler gradation is similar but the Rigden voids (test method defined in [23]) are significantly different. It has been demonstrated before [24][25][26][27] that the filler stiffening effect is strongly related to the voids in compacted filler (Rigden voids). Rigden [11] reported that with the continuous increase of the filler concentration the mastic behaviour changed from a viscous system to a plastic system at the concentration determined by the voids in compacted filler.…”

Section: Methodsmentioning

confidence: 99%

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Comparative study of the effect of long-term ageing on the behaviour of bitumen and mastics with mineral fillers

Carl

Lopes

Falla

et al. 2019

Construction and Building Materials

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Section: Consistency At Intermediate and High Temperaturessupporting

confidence: 64%

Section: Methodsmentioning

confidence: 99%

Comparative study of the effect of long-term ageing on the behaviour of bitumen and mastics with mineral fillers

Carl

Lopes

Falla

et al. 2019

Construction and Building Materials

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“…The general fraction analysis of bitumens extracted from some of the field collected samples indicated almost 95% of cumulative content of asphaltenes and resins-the value indicating excessive aging, which was surprising and similar only to the values recorded for natural asphalts [16]. This pavement was proven to contain a material high in iron [17], not consistent with the original mix design, and a hypothesis was proposed that catalytic interaction occurred between bitumen and fines during recycling process.…”

Section: Introductionmentioning

confidence: 99%

The oxidation of bitumen witnessed in-situ by infrared spectroscopy

2017

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During the production and recycling of asphalt concrete, bitumen in contact with inorganic particles is exposed to air at high temperatures. As a result an oxidation of bitumen, also known as aging, occurs. The reaction between bitumen and air at 163°C was studied insitu with and without the presence of inorganic impurities by means of fourier transform infrared spectroscopy in the attenuated reflectance mode. This oxidation was discovered to be a step-wise reaction facilitated by the oxidation of thiols and creation of peroxides within the system. The rate of reaction was demonstrated to depend on the type of impurity present, of which iron (III) chloride was the strongest catalyst. It was further demonstrated that the oxidation reaction is inhibited by the adsorption of thiol species present in the system on copper particles. Combining copper with the iron (III) chloride-containing system also resulted in the inhibition of signal increase in the sulfoxide region of the spectra. The results of this preliminary research on the bitumen oxidation reaction presented are proposed for further research regarding control of aging of asphalt concrete, especially during the recycling works.

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Study on the Change Laws of Dynamic Modulus of Asphalt Mastic with Different Framework Types

Chang¹,

Huang²,

Pei³

et al. 2017

dtetr

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ABSTRACT:In order to study the change laws of dynamic modulus with different framework types under different frequencies and temperatures and obtain the dynamic moduli with wider frequency ranges and temperature ranges, asphalt mastic specimens through removing coarse aggregates in AC-13, SMA-13 and OGFC-13 asphalt mixture were prepared. The dynamic moduli with different frequencies and temperatures were measured by simple performance tests, and the master curves of dynamic modulus of asphalt mastics were acquired by the time-temperature equivalence principle. The results show that the dynamic moduli of asphalt mastic increase with the increase of load frequencies under the same temperature, and the dynamic modulus order is AC-13>SMA-13>OGFC-13. In addition, the dynamic moduli of asphalt mastic decrease when the temperatures rise. The dynamic moduli with wider frequency and temperature ranges are obtained from the master curves of dynamic modulus of asphalt mastic.

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Etchable iron content (FETCH) proposed as the missing parameter for the better prediction of asphalt mastic stiffening

Cited by 3 publications

References 25 publications

Comparative study of the effect of long-term ageing on the behaviour of bitumen and mastics with mineral fillers

Comparative study of the effect of long-term ageing on the behaviour of bitumen and mastics with mineral fillers

The oxidation of bitumen witnessed in-situ by infrared spectroscopy

Study on the Change Laws of Dynamic Modulus of Asphalt Mastic with Different Framework Types

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