Structural-sensitive properties of self-healing asphalt concrete

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Abstract

The statistical data analysis was performed for 10 different properties of asphalt concrete determined according to GOST 31015–2002 and the optimization of the set of quality indicators was performed. Three characteristics sufficient for assessing the quality of self-healing asphalt concrete were identified. The compressive strength limit at 0 and 20оC and the splitting strength limit at 0оC are the quality system indicators sensitive to the self-healing process. It was found that the self-healing index is inversely proportional to the relative deformations to which the asphalt concrete sample is subjected when determining the physical and mechanical properties. The use of AR polymer in capsules allows achieving a greater self-healing effect compared to capsules containing vegetable oil. The use of capsules with vegetable oil is advisable only when combating cracks formed as a result of thermal-oxidative aging of asphalt concrete bitumen.

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About the authors

S. S. Inozemtsev

National Research Moscow State University of Civil Engineering

Author for correspondence.
Email: inozemtsevss@mail.ru

Candidate of Sciences (Engineering) 

Russian Federation, 26, Yaroslavskoe Highway, Moscow, 129337

E. V. Korolev

Saint Petersburg State University of Architecture and Civil Engineering

Email: korolev@nocnt.ru

Doctor of Sciences (Engineering) 

Russian Federation, 4, 2nd Krasnoarmeyskaya Street, Saint Petersburg 190005

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Supplementary files

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2. Fig. 1. The number of unique asphalt concrete compositions depending on the number of features at m=3

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3. Fig. 2. Schematic diagram of determination of physical and mechanical properties of asphalt concrete: compressive strength (a); crack resistance when splitting (b); work of destruction under shear according to the Marshall scheme (c) and uniaxial compression (d)

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4. Fig. 3. Changes in residual porosity (Vп) and water saturation (W) after self-healing of stone mastic asphalt concrete: 1 – control composition; 2 – with capsules containing vegetable oil; 3 – with capsules containing AR polymer

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5. Fig. 4. Changes in strength (a) and shear fracture energy (b) of stone mastic asphalt concrete samples: 1 – control composition; 2 – with capsules containing vegetable oil; 3 – with capsules containing AR polymer

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6. Fig. 5. Self-healing index of stone mastic asphalt concrete properties: 1 – control composition; 2 – with capsules containing vegetable oil; 3 – with capsules containing AR polymer

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