Laboratory and in-situ tests for estimating improvements in asphalt concrete with the addition of an LDPE and EVA polymeric compound

Celauro, Clara; Bosurgi, Gaetano; Sollazzo, Giuseppe; Ranieri, Maurizio

doi:10.1016/j.conbuildmat.2018.11.152

Cited by 25 publications

(14 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…PMBs are industrially produced by mechanical dispersion via the high shear mixing of a selected (virgin) polymer into the neat bitumen at a high temperature in a molten state. This modification is called “wet” modification, while another option for polymer modification is the “dry” one, where the polymer is added at the bituminous mixtures directly in the mixing chamber in an asphalt plant [ 4 , 5 ]. A typical problem encountered in PMB production is the compatibility between polymer and bitumen and the consequent stability of the modified binder after cooling and for prolonged times without stirring (storage stability), with the risks of macroscopic phase separation between polymer and bitumen.…”

Section: Introductionmentioning

confidence: 99%

Influence of Short-Term Aging on Mechanical Properties and Morphology of Polymer-Modified Bitumen with Recycled Plastics from Waste Materials

et al. 2020

View full text Add to dashboard Cite

Polymer-modified bitumen (PMB) is bitumen that has been specifically engineered with polymer for providing enhanced performance in service. The aging of bitumen is a main aspect that is able to affect its final performance: during the production phase in a hot mix plant, all the binders experience short-term aging due to the high processing temperature. The same is true during the production of the modified binder, when the polymer is dispersed at high temperature in the bitumen mass. This paper aims at studying the effect of short-term aging when using different types of modifiers such as recycled polymers obtained from waste materials. A 50/70 penetration-grade bitumen has been modified, and bitumen characterization has been carried out before and after short-term aging; conventional tests, viscosity measurements, and dynamical mechanical analysis have been used to investigate the properties. Different aging indices have been determined for predicting the effect of short-term aging based on the type of modifier. Furthermore, the morphology of the modified bitumen has been investigated via fluorescent microscopy, before and after aging, in order to highlight morphological changes due to aging. The results confirm that aging affects all the modified binders, due to the thermal stress imposed during PMBs production. Nevertheless, polymer modification is proved to reduce the aging effect in terms of an increase in the elastic modulus as experienced by the original binder.

show abstract

Section: Introductionmentioning

confidence: 99%

Influence of Short-Term Aging on Mechanical Properties and Morphology of Polymer-Modified Bitumen with Recycled Plastics from Waste Materials

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Kekerasan aspal meningkat setelah penambahan crumb rubber mengindikasikan bahwa rata-rata berat dan kerapatan molekul campuran aspal juga turut meningkat (Fang et al, 2016;Hofko et al, 2016). Pada akhirnya rentetan fenomena yang terjadi meningkatkan sifat kohesi dan adhesi aspal setelah dimodifikasi dalam mencegah rutting dan kerentanan terhadap variasi suhu (Celauro et al, 2019).…”

Section: Titik Lembek (Softening Point) Aspal Modifikasi Crumb Rubber...unclassified

Penentuan Stabilitas Penyimpanan Aspal Modifikasi Berbasis Karet Alam Padat Jenis Crumb Rubber

Wiranata¹

2021

jbchees

View full text Add to dashboard Cite

The development of road infrastructure in Indonesia is very rapid to keep pace with the growth of vehicles. However, the structure of road pavements in Indonesia is not optimal and causes various problems due to overload and Indonesia's climate. Therefore, it is necessary to increase the performance of asphalt binders with additives such as natural rubber or better known as natural rubber modified asphalt. This study examines the effect of natural rubber content (crumb rubber standard Indonesian rubber 20), sulfur additive content, storage temperature, and storage time on the phase stability of natural rubber modified asphalt. Making crumb rubber modified asphalt samples begins with the mastication of crumb rubber in an open mill. Next, crumb rubber was melted at 200°C and mixed in asphalt with 8, 10, and 12% levels. The last stage is to test the stability of modified asphalt storage at a temperature of 160°C for 48 hours. The results showed that modified asphalt with various levels of rubber experienced storage stability problems after 48 hours. The addition of sulfur additives did not significantly affect storage stability. The optimum addition of natural rubber at 10% crumb rubber content with the difference in softening point (Tbottom – Ttop) reached 11.6°C.

show abstract

“…Sustainability evaluations, thus, should be effectively taken into consideration in mix-design procedures, in a continuous balance with mechanical performance. For instance, improved mixtures (including, for instance, specific additives) based on local products may assure equivalent service-life of traditional high-level solutions [51] but can increase the environmental efficiency of the asphalt mixture. Finally, recycling asphalt mixture from pavement dismission (both in plant and in place) may also appear as a strategic choice, as it may determine reduction of consumption of aggregate and binder and related transportation impacts in addition to the previously described benefits [29].…”

Section: Environmental Impactsmentioning

confidence: 99%

Impact Analysis Using Life Cycle Assessment of Asphalt Production from Primary Data

et al. 2020

View full text Add to dashboard Cite

Road construction and maintenance have a great impact on the environment, owing to the huge volumes of resources involved. Consequently, current production procedures and technologies must be properly investigated, for identifying and quantifying the life cycle environmental impacts produced. In this paper, primary data, i.e., site-specific data directly collected or measured on a reference plant, are analyzed for calculating the impact of the production of a hot mix asphalt. The analysis is performed in a from “cradle to gate” approach to estimate the environmental burdens of the production process in an average plant, representative of the existing technology in Italy and Southern Europe. The research outcomes are useful to increase reliability in quantification of asphalt production impacts and the contribution of each component. The results represent a reference basis for producers, designers, and contractors in the decisional phases, identifying the most critical aspects in the current practice and the possible improvements for reducing impacts of road industries. In this regard, efficient energy technologies for reducing the production temperature (such as warm mix asphalt) and burned fuels are proven to assure relevant improvements in the environmental performance.

show abstract

Laboratory and in-situ tests for estimating improvements in asphalt concrete with the addition of an LDPE and EVA polymeric compound

Cited by 25 publications

References 30 publications

Influence of Short-Term Aging on Mechanical Properties and Morphology of Polymer-Modified Bitumen with Recycled Plastics from Waste Materials

Influence of Short-Term Aging on Mechanical Properties and Morphology of Polymer-Modified Bitumen with Recycled Plastics from Waste Materials

Penentuan Stabilitas Penyimpanan Aspal Modifikasi Berbasis Karet Alam Padat Jenis Crumb Rubber

Impact Analysis Using Life Cycle Assessment of Asphalt Production from Primary Data

Contact Info

Product

Resources

About