7 documents found, page 1 of 1

Soy-based rejuvenated asphalt binders: Impact on rheological properties and che...

Análise da susceptibilidade térmica de ligantes asfálticos através da energia d...

The flow activation energy (Ef) is a parameter which can be related to the thermal susceptibility of pure and modified as-phalt binders, providing useful information about their performance in service. This parameter can be obtained using either visco-simetry or rheometry. In this work, experiments for flow activation energy calculation were performed in a rotational viscometer as well as in a Dynamic Shear Rhe...

Sulfated agaran with 4,6-pyruvated form from red seaweed Acanthophora muscoides...

In vitro studies have described the sulfated agaran from Acanthophora muscoides as an intrinsic inhibitor of thrombin generation (TG), but not in ex vivo assay. This investigation partially characterized a pyruvate fraction with in vitro and ex vivo effects on an intrinsic/extrinsic pathway-induced thrombin generation (TG) continuous model using 36 or 60-fold diluted mice or defibrinated, normal human plasma. F...

Estudo comparativo das propriedades químicas do resíduo borra oleosa asfáltica ...

In this work, the main chemical characteristics of asphalt binder oil residue were studied and compared to the properties of the corresponding asphalt binder. The Nuclear magnetic resonance and Fourier transform infrared spectroscopy spectra indicated the presence of aliphatic groups, aromatics, carbonyls and sulfoxides. The thermogravimetric curve showed that the residue begins its thermal decomposition at a h...

Evaluation of Carnauba waxes in warm mix asphalt technology

Carnauba wax (CW) is a natural product which is being evaluated as a warm mix additive in order to reduce energy consumption and pollution emissions levels. The effect of adding three different types of natural carnauba waxes to asphalt cement 50/70 was investigated with the purpose of evaluating their potential as warm mix additives. Rheological tests were carried out using a rotational viscometer and a dynami...

The effect of cardanol-formaldehyde resin in the rheological properties of the ...

Due to increasing traffic in federal and state roads, asphalt pavements develop problems such as permanent deformation, fatigue cracks and thermal breakdown. This work aims to use a phenolic resin obtained from a renewable product (Cashew Nut Shell Liquid- CNSL) as an additive in asphalt mixtures. The resin was synthesized from the reaction of formaldehydewithcardanol, which was extracted from Cashew Nut Shell ...

Petroleum plant sap as an asphalt modifier for pavement applications

This research work aims to contribute to the development of a bio-binder for use at the paving industry, from the modification of a petroleum based asphalt by the sap of Euphorbia Tirucalli (Petroleum Plant). Thus, a base asphalt (PG 64-28) was modified with 3%, 5% e 10%, by weight, of sap of the petroleum plant. The functional groups present in the sap were characterized by Fourier Transformed Infrared Spectro...