Behavior of a warm mix asphalt made in an asphalt plant

Quintana, Hugo Alexánder Rondón; Vergara, Oswaldo Ignacio León; Gómez, Wilmar Darío Fernández

doi:10.14482/inde.35.1.8947

Cited by 4 publications

(4 citation statements)

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“…Existen asfaltos de emulsión, asfalto líquido y asfalto de cemento, siendo el último determinado según el grado de penetración como 40/50, 60/70, 80/100, 120/150 y 200/300 [44], y el más usado para la fabricación de mezclas asfálticas es el asfalto PEN 60/70 [47].…”

Section: Identificación Del Asfalto (Bitumen Betún O Ligante Asfáltico)unclassified

Revisión sistemática del comportamiento convencional y reológico del biocompuesto asfalto-biomasas producidas

2023

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La ingeniería de pavimentos, busca con ahínco materiales no petrolíficos como sustituyentes/mejoradores del asfalto. La producción de bioasfalto con biomasa es la técnica más usual con beneficios económicos, sociales y medioambientales. Este documento tiene como objetivo realizar una revisión literaria del mejoramiento del asfalto con biomasa en subproductos de biocarbón o bioaceite. Se efectuó una revisión de 80 artículos científicos, los cuales estudiaron las propiedades convencionales y reológicas del asfalto con porcentajes óptimos de adición de biomodificadores, considerándolos como nuevas tecnologías en las construcciones viales. Los resultados muestran que la dosis y tipo del biomaterial influye mucho como modificador, dado que el rendimiento del bioasfalto a base de biomasa garantiza reacciones positivas con una mínina adición de 1% de aceite de palma hasta 100% de ceniza de madera como máximo. En conclusión, a mayor dosis de biomodificador a altas temperaturas mayor es la mejora en la viscosidad, estabilidad, grado de penetración, punto de reblandecimiento, resistencia a la tracción indirecta, módulo de resistencia, resistencia a la deformación, resistencia a la fatiga, resistencia al deslizamiento y resistencia a la humedad del asfalto, además de tener mejores condiciones de envejecimiento oxidativo, pues generalmente el ligante asfáltico es compatible con la mayoría de los biomateriales, siendo viable como fuente de energía renovable, sostenible y de calidad.

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Section: Identificación Del Asfalto (Bitumen Betún O Ligante Asfáltico)unclassified

Revisión sistemática del comportamiento convencional y reológico del biocompuesto asfalto-biomasas producidas

2023

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“…Although the great improvements in rheological and mechanical properties that polymers such as SBS, HDPE, LLDPE, and EVA provide to asphalt binders, the usage of these additives to produce asphalt concrete mixtures (hot mix asphalt-HMA) still requires high temperatures during mixing-compaction stages (generally from 140 to 190 • C) to compensate the high bitumen-polymer viscosity [13][14][15]. These high mixing-compaction temperatures not only increase energy requirements but are also a major source of pollution, mainly because of the release of harmful gases such as CO 2 , SO 2 , volatile organic compounds, CO, and NO x [14,16,17]. This situation also provides a hazardous working environment and negatively impacts the health of workers involved in laying and compacting asphalt pavements [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

“…The use of Sasobit as a WMA is becoming increasingly widespread in the pavement construction industry due to its greater workability and numerous advantages, including energy savings, lower pollutants emissions (up to 30%), and lower mixing-compaction temperatures (about 20-40 • C reduction) [13]. Sasobit can generally improve the mechanical properties of asphalt mixtures [14] and was, thus, chosen as an LLDPE-asphalt additive.…”

Section: Introductionmentioning

confidence: 99%

“…After crystallization, Sasobit generates a lattice structure in the asphalt, which is the basis of the Sasobit-modified asphalt binder's structural stability and enhancement in asphalt stiffness and deformation resistance [23][24][25]. The recommended Sasobit loads in asphalt vary from 0.8 wt% to 3 wt% (by weight of the asphalt binder) [14]. It has been indicated that Sasobit-modified asphalt showed higher stiffness and intermediate testing temperatures compared with unmodified binders [17].…”

Section: Introductionmentioning

confidence: 99%

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Rheological and Thermo-Oxidative Aging Properties of Asphalt Modified with a Combination of Sasobit and Linear Low-Density Polyethylene

et al. 2023

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Research of different asphalt modifiers has been necessary for the attempt to construct durable roads with higher standards. Fischer Tropsch-paraffin wax (Sasobit) has recently attracted considerable attention over polymer modification due to its capacity to lower the energy requirements for asphaltic mix construction. In this study, Sasobit was used to recover the performance as well as the workability of 3 wt% linear low-density polyethylene (LLDPE) modified asphalt. A base asphalt binder with a penetration grade of 50/70 was blended with 3 wt% LLDPE and 3 wt% Sasobit separately and then combined with different Sasobit dosages (1–3 wt%). The performance of modified asphalt binders was evaluated using conventional, rheological, and thermal tests. As a result, it was found that loading Sasobit (1–3 wt%) into LLDPE-asphalt mixture steadily decreased the penetration and ductility at 25 °C from 25 to 12 dmm and 31 to 18 cm, respectively, and softening point increased by 20% indicating improved high-temperature performance. The binder workability and mix temperature were improved since the addition of Sasobit reduced the LLDPE-asphalt viscosity from 0.292 to 0.189 Pa.s (22% less). Sasobit improved the thermo-oxidative aging resistance of the binder by showing less weight variation (less than 0.001%) after the Rolling Thin-Film Oven Test (RTFOT) and high ductility retention (65%). Thermogravimetry (TG) and kinetics analysis results indicated that Sasobit-LLDPE delayed the initial and maximum decomposition temperature by 11 °C and hence increased the thermal stability of modified binders. Thus, the proposed binders are a suitable solution for asphalt pavement construction in regions that encounter high-temperature changes.

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Influence of four non-conventional additives on the physical, rheological and thermal properties of an asphalt

Jojoa¹,

Quintana²,

Gilede³

et al. 2018

Ing. Inv.

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This article shows the evaluation of the influence of two polymer wastes (crumb rubber – GCR and low density polyethylene – LDPE), a natural bitumen (Gilsonite - G) and a chemical component (Husil) about the physical, rheological and thermal properties of an asphalt cement (AC 60/70 penetration grade). Over a control asphalt and the modified asphalts were performed: penetration, softening point, ductility, ignition point, rheology (using a dynamic cut rheometer – DSR), Multi Stress Creep and Recovery (MSCR), linear amplitude sweep (LAS), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) tests. The results show that fourth additives increase the stiffness and rutting resistance of the asphalts. Additionally, it reports an increase in fatigue cracking resistance when asphalt cement is modified with GCR, G and Husil. The additives give thermal stability to the asphalt cement, providing less mass loss (linked mostly to a less oxidation).

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Behavior of a warm mix asphalt made in an asphalt plant

Cited by 4 publications

References 0 publications

Revisión sistemática del comportamiento convencional y reológico del biocompuesto asfalto-biomasas producidas

Revisión sistemática del comportamiento convencional y reológico del biocompuesto asfalto-biomasas producidas

Rheological and Thermo-Oxidative Aging Properties of Asphalt Modified with a Combination of Sasobit and Linear Low-Density Polyethylene

Influence of four non-conventional additives on the physical, rheological and thermal properties of an asphalt

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