The need of the highway agencies to customize their winter maintenance operations on porous asphalt pavements prompted the authors to develop an innovative anti-icing technology based on the hot liquid spray application of a saline hydrogel. A bio-based (phyto-based) thermo-sensitive sodium chloride (NaCl) brine, that has the ability to form a gel simply by coming into contact with a very cold surface, was conceived. The increase in viscosity and the formation of a gel-like structure would make this anti-icing product able of filling the surface voids without permeating through the mixture (longer residual deicing effectiveness), while maintaining at the same time the pavement frictional resistance. In view of adopting sustainable winter maintenance strategies, this innovative blend was formulated by exploiting the thickening and gelling properties of wall-cell polysaccharides contained in seaweeds fibers. The mechanisms of gel formation were experimentally studied in laboratory, analyzing in detail the thermal and rheological properties of the salt hydrogel during the different phases of preparation, storage and application. On the basis of this characterization, a full-scale validation was carried out on an existing highway porous asphalt pavement. For this purpose, a tank truck prototype was equipped with a heating capacity tank and a customized specific spraying system.

Phyto-based sodium chloride hydrogel for highway winter maintenance of porous asphalt pavements / Autelitano, Federico; Longo, Sandro; Giuliani, Felice. - In: CONSTRUCTION AND BUILDING MATERIALS. - ISSN 0950-0618. - 319(2022). [10.1016/j.conbuildmat.2021.126082]

Phyto-based sodium chloride hydrogel for highway winter maintenance of porous asphalt pavements

Autelitano Federico;Longo Sandro;Giuliani Felice
2022

Abstract

The need of the highway agencies to customize their winter maintenance operations on porous asphalt pavements prompted the authors to develop an innovative anti-icing technology based on the hot liquid spray application of a saline hydrogel. A bio-based (phyto-based) thermo-sensitive sodium chloride (NaCl) brine, that has the ability to form a gel simply by coming into contact with a very cold surface, was conceived. The increase in viscosity and the formation of a gel-like structure would make this anti-icing product able of filling the surface voids without permeating through the mixture (longer residual deicing effectiveness), while maintaining at the same time the pavement frictional resistance. In view of adopting sustainable winter maintenance strategies, this innovative blend was formulated by exploiting the thickening and gelling properties of wall-cell polysaccharides contained in seaweeds fibers. The mechanisms of gel formation were experimentally studied in laboratory, analyzing in detail the thermal and rheological properties of the salt hydrogel during the different phases of preparation, storage and application. On the basis of this characterization, a full-scale validation was carried out on an existing highway porous asphalt pavement. For this purpose, a tank truck prototype was equipped with a heating capacity tank and a customized specific spraying system.
Phyto-based sodium chloride hydrogel for highway winter maintenance of porous asphalt pavements / Autelitano, Federico; Longo, Sandro; Giuliani, Felice. - In: CONSTRUCTION AND BUILDING MATERIALS. - ISSN 0950-0618. - 319(2022). [10.1016/j.conbuildmat.2021.126082]
File in questo prodotto:
File Dimensione Formato  
Autelitano_et_al_CONBUILDMAT_2022.pdf

embargo fino al 20/12/2023

Tipologia: Documento in Post-print
Licenza: Creative commons
Dimensione 933.98 kB
Formato Adobe PDF
933.98 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11381/2906331
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 0
  • ???jsp.display-item.citation.isi??? 0
social impact