Review of recycling waste plastics in asphalt paving materials

Sanchez-Solis

J of Applied Polymer Sci

et al. 2023

This work presents an investigation of the incorporation of maleic anhydride (MAH)-grafted triblock copolymers and montmorillonite clay (Mt) as modifiers of asphalt. A series of unmodified copolymers styrene-butadiene-styrene (SBS), styrene-isoprene-styrene (SIS), or styrene-ethylene/butylene-styrene (SEBS) with clay were prepared by direct mixing of all components. Subsequently, they were compared with their grafted-MAH copolymer counterparts. The asphalt blends were characterized with respect to their rheological, morphological, and physical properties. Experimental results revealed that SBS and SIS grafted-copolymer composites increase the softening point by 1.5%-7%, while the penetration decreases by 2%-15% in comparison to the homologous nongrafted polymers.The improvement can be directly linked to the continuous network polymer in the asphalt blends. The combined use of styrene-isoprene-styrene-g-MAH (SISg-MAH) copolymer and clay impart higher elastic behavior than that of the other blends. G 0 increases about 95% in comparison to that of SIS/Mt, while the complex viscosity is three decades larger in the low frequencies region. Elevated rutting resistance temperature (>100 C), tanδ <5, reveals a solid-like behavior with no Newtonian plateau. SEBS-g-MAH/Mt presents diminished rheological properties with respect to those of SEBS/Mt due to poor dispersion and agglomeration of clay particles in the polymer and asphalt matrix.

Section: Results and Dicussionmentioning

confidence: 99%

Section: Fluorescent Microscope Analysismentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of rheological behavior of asphalt mixtures modified with triblock polymers grafted maleic anhydride and montmorillonite clay

Sanchez-Solis

J of Applied Polymer Sci

et al. 2023

“…Según You et al (2022), la explotación de recursos naturales continúa teniendo un impacto significativo en la industria de la construcción, particularmente en la producción y el mantenimiento de pavimentos asfálticos. Además, Hernandez-Fernandez et al (2021), Gan et al (2022), Meshram et al (2023) y Yao et al (2022) han señalado el creciente interés en la inclusión de escoria en mezclas asfálticas debido a su influencia positiva en las propiedades mecánicas de estas mezclas.…”

Section: Introductionunclassified

Influencia de la escoria metalúrgica en las propiedades mecánicas del pavimento flexible

Moncayo Ylma

2023

ING

El desarrollo de la infraestructura de transporte desempeña un papel fundamental en el fomento de actividades turísticas al mejorar la accesibilidad a diversos destinos. La calidad de las carreteras pavimentadas, en particular, influye en el flujo del comercio y el turismo. La investigación se centró en evaluar la influencia de la adición de escoria metalúrgica (EM) en las propiedades mecánicas de los pavimentos flexibles. Se utilizó una muestra de 60 briquetas que se sometieron a pruebas utilizando el método Marshall con diferentes niveles de adición de EM; 5 %, 8 %, 12 % y 15 %. Los resultados revelaron que la combinación de un 4,5 % de contenido de asfalto (CA) y un 12 % EM demostró ser adecuada en términos de estabilidad, alcanzando un valor de 1540,3 kg, así como un flujo promedio de 2,73 cm. En consecuencia, se concluye que la inclusión de EM mejora las propiedades mecánicas de la capa asfáltica, lo que sugiere que este material podría ser utilizado en el diseño de mezclas para pavimentación vial. Se recomienda que el porcentaje de EM a utilizar se encuentre en el rango del 5 % al 10 % para mantener un equilibrio adecuado entre estabilidad y flujo en la mezcla.

Transportation Research Record: Journal of the Transportation R

“…Asphalt pavement dynamic response analysis has become increasingly important in recent years ( 1 – 3 ). The diagnosis of the dynamic response of the asphalt pavement structure plays a significant role in the structural design, life prognosis, and maintenance decisions of asphalt pavements.…”

mentioning

confidence: 99%

Dynamic Viscoelastic Response of Asphalt Pavement With Random Transversely Isotropic Base Courses

You

et al. 2023

Self Cite

Diagnosis of the dynamic response of an asphalt pavement structure coupled with involving inherent anisotropic properties of pavement materials serves as a vital tool for pavement analysis and design platforms. The mechanical response of asphalt pavement is strongly influenced by the random anisotropic properties (simplified as transversely isotropic properties in this study) because of the shape, distribution, orientation, degree of compaction, void structure, and so forth, of the granular materials in asphalt pavements. This study aims to introduce a computational framework by generating a three-dimensional finite element-based program to analyze the influence of thermo-viscoelasticity of the asphalt layer and transverse isotropy of the base courses and its randomness on asphalt pavements under the effect of moving vehicle loading. The accuracy and efficiency of the developed numerical program were verified by comparing our results with previous studies. Concurrently, the influences of random field conditions, transversely isotropic properties, and the temperature field were involved in assessing their action on the fatigue life prediction of pavement. It was concluded that the fatigue life of the asphalt pavement model, considering the transverse isotropy of the material, random field, and temperature field, was reduced by 48.1%, which would mislead the state assessment of asphalt pavements. Therefore, during asphalt pavement design and its viscoelastic response analysis, it is recommended to consider the influence of the random modulus, temperature fields, and transversely isotropic properties on the structural assessments.