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Description | ||
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Duracycle™ is based on the knowledge that asphalt for use in road construction is 100% recyclable and the use of RAP (reclaimed asphalt pavement) for recycling has been widespread for 30 years. Asphalt pavement is the most recycled material in the USA and each year over 100 million tonnes of asphalt pavement is reused or recycled into new pavements. A major benefit is that virtually all of this recycling happens at the top of the value / end use chain i.e. back into new asphalt material, without detriment or compromise to the quality of the finished product. Lafarge North America asphalt operations do not just recycle RAP but our mixes utilize 'waste' material from other industries, with roofing shingles, tire rubber, glass and spent rail ballast all being incorporated into new asphalt production reducing total life cycle greenhouse gases by 10%. Performance: The Superpave mix design method can be applied to mixes containing high percentages of RAP (25%) and ASM (10%). In terms of mechanical performances, results show that the use of RAP and ASM: 1) Increase the stiffness at 20°C and 10Hz. This point is very advantageous for pavement design 2) Improve the rutting resistance of HMA 3) Improve the fatigue resistance of HMA 4) Insignificantly affect low-temperature cracking resistance in mixes containing up to 15% RAP and 5% ASM 5) Slightly affect moisture resistance. However the TSR values are over 80% (required limit in AASHTO) |
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Nov 14, 2020 |
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Nov 14, 2020 |
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Chemicals |