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Linear and non-linear viscoelastic behavior of SBS and LDPE modified bituminous mastics
Graphical abstract Display Omitted
Highlights Dynamic shear/torsional tests as a tool to evaluate mastics’ in-service performance. Marked differences between binders/mastics rheology due to filler contribution. Improved elasticity at 55°C if 3wt.% LDPE binder is loaded with 65wt.% filler. Reduced non-linear strain susceptibility at 25°C in 3wt.% SBS modified mastic.
Abstract This article compares bituminous mastics modified by either the tri-block copolymer styrene-butadiene-styrene (SBS) or low density polyethylene (LDPE). Linear and non-linear oscillatory measurements were conducted at 25 and 55°C, taken as representative of the medium and high in-service temperatures, respectively. For 3wt.% polymer, distinct rheological responses were found. The LDPE-mastic showed enhanced linear complex shear modulus and elasticity at 55°C. Conversely, if subjected to deformations beyond the linear viscoelasticity (LVE) limit, the SBS-mastic presented an improved capacity of complex modulus recovery, at 25°C, when it returned to the LVE regime.
Linear and non-linear viscoelastic behavior of SBS and LDPE modified bituminous mastics
Graphical abstract Display Omitted
Highlights Dynamic shear/torsional tests as a tool to evaluate mastics’ in-service performance. Marked differences between binders/mastics rheology due to filler contribution. Improved elasticity at 55°C if 3wt.% LDPE binder is loaded with 65wt.% filler. Reduced non-linear strain susceptibility at 25°C in 3wt.% SBS modified mastic.
Abstract This article compares bituminous mastics modified by either the tri-block copolymer styrene-butadiene-styrene (SBS) or low density polyethylene (LDPE). Linear and non-linear oscillatory measurements were conducted at 25 and 55°C, taken as representative of the medium and high in-service temperatures, respectively. For 3wt.% polymer, distinct rheological responses were found. The LDPE-mastic showed enhanced linear complex shear modulus and elasticity at 55°C. Conversely, if subjected to deformations beyond the linear viscoelasticity (LVE) limit, the SBS-mastic presented an improved capacity of complex modulus recovery, at 25°C, when it returned to the LVE regime.
Linear and non-linear viscoelastic behavior of SBS and LDPE modified bituminous mastics
Roman, Claudia (author) / Cuadri, Antonio A. (author) / Liashenko, Ievgenii (author) / García-Morales, Moisés (author) / Partal, Pedro (author)
Construction and Building Materials ; 123 ; 464-472
2016-07-12
9 pages
Article (Journal)
Electronic Resource
English
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