Dynamic Properties of Reclaimed Asphalt Pavement–Green Cement Blends for Road Base Layer

Consoli, NC; Tebechrani Neto, A; Khajeh, A; Salimi, M; Specht, LP; Vestena, PM; da Rocha, CG

Dynamic Properties of Reclaimed Asphalt Pavement–Green Cement Blends for Road Base Layer

Consoli, NC Tebechrani Neto, A Khajeh, A Salimi, M Specht, LP Vestena, PM da Rocha, CG

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Publisher:: Springer Nature
Publication Type:: Journal Article
Citation:: Geotechnical and Geological Engineering, 2023, 41, (6), pp. 3495-3511
Issue Date:: 2023-08-01

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Field	Value	Language
dc.contributor.author	Consoli, NC
dc.contributor.author	Tebechrani Neto, A
dc.contributor.author	Khajeh, A
dc.contributor.author	Salimi, M
dc.contributor.author	Specht, LP
dc.contributor.author	Vestena, PM
dc.contributor.author	da Rocha, CG
dc.date.accessioned	2024-04-17T22:47:21Z
dc.date.available	2024-04-17T22:47:21Z
dc.date.issued	2023-08-01
dc.identifier.citation	Geotechnical and Geological Engineering, 2023, 41, (6), pp. 3495-3511
dc.identifier.issn	0960-3182
dc.identifier.issn	1573-1529
dc.identifier.uri	http://hdl.handle.net/10453/178023
dc.description.abstract	Replacing resource-intensive materials with less impactful alternatives, particularly industrial wastes, or by-products, has been a trend in several areas, including the design and construction of infrastructure projects such as roads and highways. This paper examines the use of Reclaimed Asphalt Pavement (RAP—aged pavement containing asphalt and aggregates removed from existing roads) combined with Carbide Lime (CL—a by-product of acetylene gas manufacture) and Ground Glass (GG—a waste containing amorphous silica) as a blend for the road base layer. The pozzolanic reactions between calcium ions in CL and the amorphous silica in GG create cementitious compounds that were found to enhance splitting tensile strength (qt), maximum shear modulus (Gmax), resilient modulus, and dynamic modulus (E*) of RAP–GG–CL blends. The porosity/binder index provided an appropriate parameter for modelling all these mechanical properties. A unique equation between the dynamic modulus and the porosity/binder index was obtained for the frequencies and temperatures studied. Generally, mixtures with lower porosity/binder index provided higher strength and stiffness due to their lower void volumes and higher solid particles in their micro-architectural structure. Finally, an environmental analysis was carried out, showing that the benefits of this fully recycled alternative to gravel (traditionally used for base layers) can be further enhanced by creating dosages best suited to different scenarios.
dc.language	en
dc.publisher	Springer Nature
dc.relation.ispartof	Geotechnical and Geological Engineering
dc.relation.isbasedon	10.1007/s10706-023-02470-0
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering
dc.subject.classification	Geological & Geomatics Engineering
dc.subject.classification	4005 Civil engineering
dc.subject.classification	4019 Resources engineering and extractive metallurgy
dc.title	Dynamic Properties of Reclaimed Asphalt Pavement–Green Cement Blends for Road Base Layer
dc.type	Journal Article
utslib.citation.volume	41
utslib.for	0905 Civil Engineering
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
utslib.copyright.status	closed_access	*
dc.date.updated	2024-04-17T22:47:20Z
pubs.issue	6
pubs.publication-status	Published
pubs.volume	41
utslib.citation.issue	6

Abstract:

Replacing resource-intensive materials with less impactful alternatives, particularly industrial wastes, or by-products, has been a trend in several areas, including the design and construction of infrastructure projects such as roads and highways. This paper examines the use of Reclaimed Asphalt Pavement (RAP—aged pavement containing asphalt and aggregates removed from existing roads) combined with Carbide Lime (CL—a by-product of acetylene gas manufacture) and Ground Glass (GG—a waste containing amorphous silica) as a blend for the road base layer. The pozzolanic reactions between calcium ions in CL and the amorphous silica in GG create cementitious compounds that were found to enhance splitting tensile strength (qt), maximum shear modulus (Gmax), resilient modulus, and dynamic modulus (E*) of RAP–GG–CL blends. The porosity/binder index provided an appropriate parameter for modelling all these mechanical properties. A unique equation between the dynamic modulus and the porosity/binder index was obtained for the frequencies and temperatures studied. Generally, mixtures with lower porosity/binder index provided higher strength and stiffness due to their lower void volumes and higher solid particles in their micro-architectural structure. Finally, an environmental analysis was carried out, showing that the benefits of this fully recycled alternative to gravel (traditionally used for base layers) can be further enhanced by creating dosages best suited to different scenarios.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/178023