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A platform for research: civil engineering, architecture and urbanism
Performance-Related Characterization of SBS-Modified Bitumen-Filler Mastics Incorporating Hydrated Lime
https://orcid.org/http://orcid.org/0000-0002-9388-0590
https://orcid.org/http://orcid.org/0000-0002-2891-2517
Nowadays, road maintenance and rehabilitation strategies represent important budget investments worldwide as a result of the need for suitable pavement structures. The selection of alternative materials for more efficient and durable solutions is therefore imperative through research initiatives and field projects. In response to these requirements, this paper reports the main results derived from an experimental study on asphalt mastics produced with a combined use of styrene-butadiene-styrene polymer modified bitumen and hydrated lime as a partial replacement of limestone filler. The set of five materials considered were subjected to laboratory tests, to characterize the stiffening mechanism and the performance response in terms of fatigue, thermal cracking and permanent deformation. From the results, some benefits and limitations on the use of hydrated lime as a partial replacement of limestone filler were observed, indicating its potential use at optimum filler dosage for pavement locations with warm-to-hot weather as a consequence of the filler stiffening mechanism and its consequences on the elastic response to counteract permanent deformation. Fatigue cracking results suggested detrimental effects on the predicted fatigue lives for very high hydrated lime concentrations, further suggesting the need of an optimum HL below 10% by total mastic volume. Furthermore, the low-temperature results measured through delta Tc values validate substantial improvements in the thermal cracking resistance with the incorporation of HL as a partial replacement of LF.
Performance-Related Characterization of SBS-Modified Bitumen-Filler Mastics Incorporating Hydrated Lime
https://orcid.org/http://orcid.org/0000-0002-9388-0590
https://orcid.org/http://orcid.org/0000-0002-2891-2517
Nowadays, road maintenance and rehabilitation strategies represent important budget investments worldwide as a result of the need for suitable pavement structures. The selection of alternative materials for more efficient and durable solutions is therefore imperative through research initiatives and field projects. In response to these requirements, this paper reports the main results derived from an experimental study on asphalt mastics produced with a combined use of styrene-butadiene-styrene polymer modified bitumen and hydrated lime as a partial replacement of limestone filler. The set of five materials considered were subjected to laboratory tests, to characterize the stiffening mechanism and the performance response in terms of fatigue, thermal cracking and permanent deformation. From the results, some benefits and limitations on the use of hydrated lime as a partial replacement of limestone filler were observed, indicating its potential use at optimum filler dosage for pavement locations with warm-to-hot weather as a consequence of the filler stiffening mechanism and its consequences on the elastic response to counteract permanent deformation. Fatigue cracking results suggested detrimental effects on the predicted fatigue lives for very high hydrated lime concentrations, further suggesting the need of an optimum HL below 10% by total mastic volume. Furthermore, the low-temperature results measured through delta Tc values validate substantial improvements in the thermal cracking resistance with the incorporation of HL as a partial replacement of LF.
Performance-Related Characterization of SBS-Modified Bitumen-Filler Mastics Incorporating Hydrated Lime
https://orcid.org/http://orcid.org/0000-0002-9388-0590
https://orcid.org/http://orcid.org/0000-0002-2891-2517
Nowadays, road maintenance and rehabilitation strategies represent important budget investments worldwide as a result of the need for suitable pavement structures. The selection of alternative materials for more efficient and durable solutions is therefore imperative through research initiatives and field projects. In response to these requirements, this paper reports the main results derived from an experimental study on asphalt mastics produced with a combined use of styrene-butadiene-styrene polymer modified bitumen and hydrated lime as a partial replacement of limestone filler. The set of five materials considered were subjected to laboratory tests, to characterize the stiffening mechanism and the performance response in terms of fatigue, thermal cracking and permanent deformation. From the results, some benefits and limitations on the use of hydrated lime as a partial replacement of limestone filler were observed, indicating its potential use at optimum filler dosage for pavement locations with warm-to-hot weather as a consequence of the filler stiffening mechanism and its consequences on the elastic response to counteract permanent deformation. Fatigue cracking results suggested detrimental effects on the predicted fatigue lives for very high hydrated lime concentrations, further suggesting the need of an optimum HL below 10% by total mastic volume. Furthermore, the low-temperature results measured through delta Tc values validate substantial improvements in the thermal cracking resistance with the incorporation of HL as a partial replacement of LF.
Performance-Related Characterization of SBS-Modified Bitumen-Filler Mastics Incorporating Hydrated Lime
Lecture Notes in Civil Engineering
Pereira, Paulo (editor) / Pais, Jorge (editor) / Carvajal-Muñoz, Juan S. (author) / Airey, Gordon (author) / Vergara, Isabela (author) / Sanjuan, Anyely (author) / Pérez, María (author) / Contreras, María (author) / Hernández, Rubén (author) / Cepeda, Juan (author)
International Conference on Maintenance and Rehabilitation of Pavements ; 2024 ; Guimarães, Portugal
2024-07-21
11 pages
Article/Chapter (Book)
Electronic Resource
English
Multi-scale characterization of hydrated lime mastics
| Online Contents | 2017
Multi-scale characterization of hydrated lime mastics
| British Library Online Contents | 2017
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