2022 SFP 3-1 COMPLETED
Release time: 2024/07/17 Publisher： original Views：
Application technology and engineering demonstration of hot in-place recycling of waste asphalt pavement
Principal Investigator：
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Zeng Wei Research Institute of Highway Ministry of Transport |
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Project Background:
Aged asphalt pavement recycling technology is beneficial to the sustainable development of highway engineering. The hot-in-place regeneration technology can realize the original in-place regeneration of the aged pavement, and can quickly repair the original pavement disease. However, due to the high heating temperature of the original pavement can result to high energy consumption, serious flue gas pollution. Asphalt warm mix technology is a green pavement technology can reduce the construction temperature and achieve the purpose of reducing energy consumption, reducing greenhouse gas and harmful substances emissions.
Aims & Goals:
1. To research and develop new additives with fast penetration and easy compaction functions for hot-in-place recycling technology of aged asphalt pavement;
2. To reduce the construction temperature of hot-in-place recycled asphalt mixture by more than 30°C, compared with the traditional hot-in-place recycling technology;
3. To improve the performance of in-place recycled asphalt mixture and meet the specification requirements by optimizing the mineral grading of hot-in-place recycled asphalt mixture and additives.
1. The freeze-thaw splitting strength ratio of in-place warm mixed recycled asphalt mixture was increased by 2.4% by using new additives of hydrocarbon-based regenerator ( polycyclic aromatic hydrocarbons extracted oil) and warm mixing agent (silane);
2. Adopting in-place warm mixed regeneration technology, the construction temperature is reduced by nearly 20℃ and the energy consumption of in-place recycled asphalt mixture construction is effectively reduced.
PAPER1: 'Performance research and engineering application of in-place recycled asphalt mixture with warm mixing technology' (in Chinese), Petroleum Asphalt, 2023, 37(3) :43-47.
PATENT 1: A kind of hot-in-place recycled asphalt mixture with warm-mixed technology and its preparation method (filed)
STANDARD: Group standard - Technical specification for clean hot in-place recycling construction of asphalt pavement (Draft for review)
DEMONSTRATION 1：A demonstration of 4.8 km hot in-place recycled asphalt pavement using warm-mixed technology was implemented in the Nanyang section of Shanghai-Shaanxi expressway.
DEMONSTRATION 2：A demonstration of hot in-place recycling of waste asphalt pavement was implemented in Baotou-Maoming expressway.
