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Introduction
Bitumen pavement recycling is a new concept for pavement maintenance and repair. It involves recycling of asphalt materials from the pavement surface, and then re-forming them into a new pavement layer. Bitumen pavement recycling can be done by both hot and cold methods, and is increasingly being used within the construction sector. For example, it is used extensively for road reconstruction and maintenance, as well as for military facilities, airports, and residential driveways. The recycled asphalt material is blended with upgraded aggregates to form a durable paving material which is then laid on the pavement surface. The new asphalt material is highly resistant to wear, and is often stronger than the original pavement material. In addition, it provides an enormous economic, ecological and environmental benefit to the road user.
Hot In-Place Recycling
Hot in-place recycling is one of the most widely used bitumen pavement recycling techniques, and it shares some similarities with cold in-place recycling processes. During the hot in-place recycling process, a special truck or machine is used to heat up the pavement surface and then break down the existing pavement layer into a crushed aggregate. This aggregate is then mixed with a bitumen emulsion, which is then applied to the newly formed road surface. The emulsion is then heated again and spread evenly across the road surface, forming a strong and durable new asphalt layer.
The advantages of hot in-place recycling are that it is very economical, allowing for the reuse of existing asphalt materials and reducing the need to purchase new asphalt. It also decreases the energy required to produce new asphalt, and is one of the most environmentally friendly recycling processes available. In addition, hot in-place recycling reduces the amount of land disruption and dust, which can cause health and safety risks.
Specialized Machinery
In order to perform hot in-place recycling, specialized machinery is needed. The most common type of machine used for hot in-place recycling is a thermal regeneration truck or a specialized asphalt processor. Thermal regeneration trucks are equipped with large tanks which heat up the pavement surface, and then grind or mill down the existing pavement layer into a finely crushed aggregate. Asphalt processors are machinery used for special applications, such as those involving thicker pavements or when large areas are to be recycled. These machines are capable of recycling large areas effectively and quickly, reducing the amount of time needed for the whole process.
Conclusion
Bitumen pavement recycling has become increasingly popular due to its numerous economic, ecological and environmental benefits. Hot in-place recycling is one of the most common methods used for pavement renewal, and requires the use of specialized machinery. This machinery helps to provide a durable and reliable pavement surface, while reducing the amount of energy and resources required for the process. With the increasing use of bitumen pavement recycling techniques, it is expected that this trend will continue to develop and expand in the near future.
