Research of Low-Temperature Performance of Polyphosphoric Acid-Modified Asphalt

Article Construction & Building Technology

Evaluating the effects of styrene-butadiene rubber (SBR) and polyphosphoric acid (PPA) on asphalt adhesion performance

Yajin Han et al.

Summary: This paper evaluates the influences of SBR, PPA, and SBR&PPA on the adhesion performance of base asphalt. The results show that the dosages of SBR and PPA have a significant impact on the adhesion performance of the asphalt binder and its mixture. At the nanoscale, PPA and SBR modifiers can improve the adhesion force of base asphalt. At the asphalt scale, both modifiers enhance the surface free energy of base asphalt. At the asphalt-aggregate and mixture scales, the SBR modifier significantly enhances the pull-off strength and dry tensile strength of the asphalt. Considering the moisture damage resistance, the asphalt modified with 1.5% SBR&2% PPA is recommended.

CONSTRUCTION AND BUILDING MATERIALS (2022)

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Article Construction & Building Technology

Evaluating the thermal aging-induced raveling potential of thin friction course (TFC)

Yajin Han et al.

Summary: This study investigates the aging-induced raveling performance of thin friction courses (TFCs) and the chemical composition transformation and rheological properties of asphalt emulsion residue. The results demonstrate that prolonging the aging duration and increasing the dosage of emulsion and SBR can improve the raveling resistance of TFCs. The presence of SBR latex reduces the aging degree and enhances the fatigue resistance of asphalt emulsion residue. The aging degree index is well correlated with the raveling potential of TFCs.

CONSTRUCTION AND BUILDING MATERIALS (2022)

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Article Green & Sustainable Science & Technology

Waste engine oil and polyphosphoric acid enhanced the sustainable self-healing of asphalt binder and its fatigue behavior

Ziming Liu et al.

Summary: This study explores the effects of waste engine oil (WEO) and polyphosphoric acid (PPA) on the self-healing and fatigue behavior of asphalt binder. The results show that the addition of PPA and WEO can improve the fatigue performance and self-healing of asphalt binder.

JOURNAL OF CLEANER PRODUCTION (2022)

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Article Construction & Building Technology

Polyphosphoric acid and plasticizer modified asphalt: Rheological properties and modification mechanism

Ruimeng Song et al.

Summary: This study investigates the performance of plasticizer and polyphosphoric acid (PPA) modified asphalts and their impact on high and low temperature properties. The results indicate that the addition of PPA effectively improves the high temperature deformation resistance and elastic recovery ability of plasticizer modified asphalts, with the improvement degree positively correlated to the PPA content. The combination of plasticizer and PPA modification is simple and shows promising overall performance.

CONSTRUCTION AND BUILDING MATERIALS (2021)

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Review Chemistry, Multidisciplinary