Comparative Analysis of Long-Term Field Performance of Recycled Asphalt in California Environmental Zones

Abstract

A study was performed to evaluate the long-term performance of different pavement materials in California. The performance of many special materials, including recycled asphalt pavement (RAP), was evaluated for actual field performance rather than laboratory-based performance. The sections considered in this study were selected to allow the environmental impact on the performance of a specific treatment to be addressed and comparative analysis between two or more treatments to be performed. This paper focuses on a comparative analysis performed on 47 RAP sections located in three California environmental zones: desert, mountain, and north coast. Comparisons were made between the performance of the RAP sections and those of other treatments located within a reasonable distance on the same route. In total, 131 sections covering seven different treatments were considered. The performance comparisons were made with respect to in situ structural capacity, distress condition, roughness condition, and consistency of construction. Deterioration models were developed and used to estimate the in situ structural capacity, distress condition, and roughness condition for all sections at the same age (5 years) to allow fair comparisons. The expected structural, distress, and roughness service lives were also estimated for all treatments on the basis of the field-observed conditions. The results of the analyses suggested that in all three environmental zones, long-term RAP performance is likely to be comparable to other treatments located within a reasonable distance on the same route.

Karštai regeneruoto asfalto mišinio komponentų sąveikos modeliavimas ir jo naudojimo kelių dangos konstrukcijoje tyrimas

“…Laikui bėgant kelio dangos būklė blogėja dėl eismo ir aplinkos veiksnių poveikio (Zaghloul, Holland 2008;Sivilevičius, Šukevičius 2007;Chatti, El Mahtar 2004;Sivilevičius 2011b;Котлярский 2008;Xu et al 2010;Mo et al 2010;Королев et al 1984;Кашевская 2003).…”

“…Buvo atliktas tyrimas (Zaghloul, Holland 2008) siekiant įvertinti ilgalaikes skirtingų kelio dangos medžiagų savybes Kalifornijoje (JAV). Įvertintos gumos asfalto mišinio, regeneruoto asfalto mišinio ir dangų stiprinamųjų medžiagų faktinės eksploatacinės savybės, o ne savybės, nustatytos laboratoriniais tyrimais.…”

“…Kalifornijos transporto departamentas leidžia naudoti iki 15 % RA granulių kaip naujų mineralinių medžiagų pakaitalą KMA mišinyje. Analizės rezultatai (Zaghloul, Holland 2008) parodė, kad palyginus regeneruotos asfalto dangos (RAD) ruožų ir asfaltbetoninės dangos ruožų iš naujų medžiagų tikėtiną eksploatavimo trukmę (imant kelio ruožus šiaurės pakrantėje) matyti, jog RAD ilgalaikės eksploatacinės savybės yra panašios į asfaltbetonio dangos savybes, o yra gal net geresnės. Gauti rezultatai ir atlikta analizė taip pat parodė, kad visose trijose aplinkos zonose RAD ilgalaikės eksploatacinės savybės gali būti palygintos su kitais kelio dangos apdorojimo metodais ruožuose, kurie išsidėstę viename kelyje priimtinu atstumu.…”

Research and Evaluation of Ruts in the Asphalt Pavement on Lithuanian Highways

“…Consequently, thicker pavements with higher-quality materials are required for high traffic facilities (Zaghloul, Holland 2008). Therefore, it is not possible to compare the structural capacity of two pavement sections such as high traffic main interstate highways and low-traffic rural roads subjected to different traffic intensity without taking into consideration traffic effects.…”

“…For the purposes of the current analysis (Zaghloul, Holland 2008), a pavement section is assumed to be reconstructed when its structural adequacy index reaches a value of 0.5. Apeagyei et al (2011) evaluated the rutting resistance of plant-produced AC mixtures in the laboratory.…”