Reduction of Bitumen Content and Production Temperature of Hot-Mix Asphalt Incorporating RAP Using Dune Sand and Lime

Néji, Jamel; Siala, Ahmed; Khay, Saloua El Euch; Loulizi, Amara

doi:10.1007/978-3-030-46455-4_194

Cited by 2 publications

(6 citation statements)

References 5 publications

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“…Despite its advantages, RAP is still considered as waste and is rarely used in road construction in North African countries [24][25][26]. This work is a continuation of previous investigations that have aimed to better prediction of the viscoelastic behavior of asphalt mixtures incorporating high RAP content, and other additions such as dune sand and lime [13,17,19,20]. In this paper, a new formula that contains 40% of RAP, 10% of dune sand and 1% of hydrate lime is proposed and tested to evaluate its mechanical behavior and compare it to that of the conventional mixes.…”

Section: Introductionmentioning

confidence: 92%

“…It has a significant fraction of 0/1. It is also rich in silica, and its mineralogical nature is quartz, which has a high stiffness that can improve the mechanical behavior of bituminous mixtures [17]. Figures 2 and 3 show the gradation curve of dune sand and the granulometric curves of granular mixtures of both materials, respectively.…”

Section: Materials and Samples Preparationmentioning

confidence: 99%

“…The addition of dune sand to bituminous mixtures has been the subject of several researches, in order to improve their mechanical properties, given its high-stiffness mineralogical nature (quartz) [16]. Due to its abundance in the world, dune sand is also considered another alternative that minimizes the use of non-renewable aggregates [17]. Ben Dhia [18] has revealed a significant improvement in the mechanical behavior of asphalt mixture containing dune sand.…”

Section: Introductionmentioning

confidence: 99%

“…Hence, it has been recommended to mix dune sand with other materials, such as hydrate lime, which is a popular additive that increases asphalt mixtures durability. In fact, lime allows to increase the deformation resistance, stiffness and rutting resistance [17,20] and to reduce the chemical ageing of the bitumen and limit its oxidation [21,22]. Siala and al. have demonstrated that the addition of 1% of hydrate lime to an asphalt mix containing 40% of RAP and 10% of dune sand improves the mechanical performances, in particular, the Marshall creep and the resistances in water and air [13].…”

Section: Introductionmentioning

confidence: 99%

“…Siala and al. have demonstrated that the addition of 1% of hydrate lime to an asphalt mix containing 40% of RAP and 10% of dune sand improves the mechanical performances, in particular, the Marshall creep and the resistances in water and air [13]. A reduction of the production temperature has also been noted to approach the manufacturing temperature of warm-mix asphalt (WMA) [17], which deals with concerns about global warming and energy consumption. This decrease in temperature reduces at the same time the aging of the binder, to have an effect similar to that of a softer binder grade, and the compaction energy [23].…”

Section: Introductionmentioning

confidence: 99%

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Experimental and Numerical Studies of Viscoelastic Behavior of Bituminous Mixture with a High Rate of Reclaimed Asphalt Pavement, Dune Sand and Lime

Borcheni

Kraiem

Neifar

et al. 2023

JERA

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Road construction is now a priority in the economic and social development policy of a country. The increased need to improve the infrastructure system and to counter the deficit in certain quarry gravels and non-renewable resources while saving increasingly expensive road investments, makes recourse to the use of abundant and inexpensive materials in order to reduce the use of non-renewable natural materials. The objective of this research is to predict the viscoelastic behavior of asphalt mixtures incorporating high Reclaimed Asphalt Pavement (RAP) content, allowing to reduce the consumption of new aggregates and bituminous binders, and other additives such as dune sand and lime. A new formula containing 3,7% of 35/50 penetration grade virgin bitumen, 40% of Reclaimed Asphalt, 10% of dune sand, and 1% of hydrate lime was tested and compared to the conventional formula containing 5,3% of the same virgin bitumen. To evaluate the impact of dune sand and lime addition on the mechanical behavior of bituminous mixtures containing high rates of RAP, complex modulus tests were conducted on the studied mixtures, at different temperatures and frequencies, using a two-point bending device that was developed at the National School of Engineers of Tunis. Their viscoelastic properties were determined using a Generalized Maxwell model which was calibrated by 2S2P1D model. The paper describes a three-dimensional Finite Element (FE) model developed using ABAQUS software, that is used to simulate 2-point bending tests on trapezoidal samples of the studied mixtures to determine their complex modulus and accurately predict their mechanical behavior under traffic loading at ranges of temperatures and frequencies that are not experimentally accessible. To validate the FE model, determined viscoelastic properties have then been introduced into through the Prony series and its outputs were validated by experimental measurements. Both experimental and numerical results show that the use of RAP, dune sand and lime greatly improves the rigidity of the mix at high temperatures. A suggested continuation of this work would be an investigation of the rutting resistance.

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Section: Introductionmentioning

confidence: 92%

Section: Materials and Samples Preparationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Experimental and Numerical Studies of Viscoelastic Behavior of Bituminous Mixture with a High Rate of Reclaimed Asphalt Pavement, Dune Sand and Lime

Borcheni

Kraiem

Neifar

et al. 2023

JERA

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Laboratory Investigation of Using Calcium Lignosulfonate as an Oxidation Inhibitor in Bitumen

Fatemi

Bazaz

Ziaee

2022

Advances in Civil Engineering

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Asphalt mixtures are the major constituent of road constructions. Those mixtures expose to high-temperature levels during the construction process and their life cycle. The bitumen aging occurred because of the harmful effects of elevated temperatures upon the asphalt mixtures, which leads to oxidation, evaporation, and physical hardening within the bitumen structure. The aging phenomenon can intensify the hardness and brittleness of bitumen, which negatively affects the performance of asphalt mixtures. Researchers have investigated different types of bitumen additives to diminish the negative effects of bitumen aging, among which biomass additives are more attractive for researchers because that additives are organic and mainly emanate from waste materials. The current study investigated the effect of calcium lignosulfonate (CLS) at four quantities (i.e., 5%, 10%, 15%, and 20% by the weight of base bitumen) as an antiaging bitumen additive on physical, workability, thermal susceptibility, rheological, and chemical properties of 60/70 penetration grade bitumen. The results revealed that although the addition of CLS into the bitumen enhanced the rigidity of bitumen against rutting failure at high-temperature conditions, the CLS-modified bitumen was more susceptible to fatigue failure than the virgin bitumen at low-temperature regions. The workability analysis showed that the CLS powder could improve the bitumen’s consistency against permanent deformation at high-temperature levels. Although the bitumen’s viscosity increased because of CLS modification, the CLS-modified bitumen provided acceptable workability based on the Superpave specifications. Outcomes from the rheological test revealed that the addition of CLS into the bitumen improved the rutting resistance of bituminous mixtures at high-temperature levels. The SARA analysis indicated that the hardening of CLS-modified samples emanated from the formation of asphaltenes within the bitumen because of CLS incorporation. Different types of aging indices, including PRP, SPI, VAI, and AIRF, which were calculated in this research, showed that the presence of CLS within the bitumen could retard the bitumen’s aging process.

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Reduction of Bitumen Content and Production Temperature of Hot-Mix Asphalt Incorporating RAP Using Dune Sand and Lime

Cited by 2 publications

References 5 publications

Experimental and Numerical Studies of Viscoelastic Behavior of Bituminous Mixture with a High Rate of Reclaimed Asphalt Pavement, Dune Sand and Lime

Experimental and Numerical Studies of Viscoelastic Behavior of Bituminous Mixture with a High Rate of Reclaimed Asphalt Pavement, Dune Sand and Lime

Laboratory Investigation of Using Calcium Lignosulfonate as an Oxidation Inhibitor in Bitumen

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