Tito Machinery Leads RAP Regeneration Plant Technology

Since the beginning of this year, Fujian Tietuo Machinery Co., Ltd. (hereinafter referred to as Tietuo Machinery) has been conquering the sharp growth of its large-scale complete sets of equipment for RAP recycling plants, maintaining a 30% growth rate. Especially in terms of asphalt recycling equipment, compared with last year, the first three quarters of the previous year have doubled.

Significant economic and social benefits According to Gao Tuile, chief technical officer of Tietuo Machinery, a recycling plant with an output of 80 tons per hour is used in conjunction with a corresponding model of primary equipment to build a 10-km-long, bidirectional 6-lane road with asphalt thickness of 18 cm of asphalt pavement, the total amount of asphalt mixture needed is about 100,000 tons. If you do not use renewable technology, the cost of fresh asphalt mixture is about 50 million yuan. If you choose suitable equipment and construction technology, add 30% of recycled materials, you can not only use the old road repair and reconstruction under the premise of meeting road pavement quality requirements. The waste produced in the process protects the local natural environment, and it can reduce the material cost of asphalt pavement by 10% to 15%.

According to the plan, by 2020, the total length of highways in China will exceed 100,000 kilometers, and the total length of asphalt pavement will exceed 1 million kilometers. As the semi-rigid base asphalt pavement is widely used in our country, the design service life is generally between 10 and 15 years. Calculated on the 100,000-km high-speed road in 2020, the annual overhaul mileage will reach 6,700 kilometers, and more than 69 million tons of waste materials will be produced. If these materials are not well recycled, they will not only pollute the natural environment, but also cause great waste of sand and stone, asphalt and other resources.

The emergence of asphalt mixture regeneration technology has opened up a new path to solve this problem. This regeneration technology will excavate or milling, crushing, and screening the old road surface materials. Through testing the aging degree and gradation of RAP, the RAP aggregate will be added to the specific gravity, proportion, and a certain amount of regenerant and new aggregate, and Bitumen and other materials are remixed to form a complete set of process technology for recyclable mixes with good road performance. Zhang Yiluo, an associate professor of the College of Highway Studies of Chang’an University, pointed out in the report that there are several classifications of this regeneration technology based on different processing technologies for materials, in which the plant regeneration heat regeneration method has high parameter controllability such as mixture temperature and mix ratio, and equipment procurement cost. Low-level advantages are the highest at home and abroad, and developed countries mainly adopt the RAP thermal regeneration factory model.

Resolving key problems in regenerative technology At present, RAP regenerative equipment developed by Tietuo Machinery has overcome many difficulties in RAP thermal regenerative technology and first raised the concept of RAP thermal regenerative technology to the height of industrialized process management in China.

Tietuo also solved the key issues affecting the regenerative technology, such as RAP grade control, RAP material testing, formula design, mixing of recycled asphalt mixture, avoiding further aging of asphalt, guaranteeing full regeneration of aged asphalt, and solving sticking of cylinder wall. Material problems, development and use of regenerants, etc.

At the same time, Tietuo Machinery also collaborated with the Institute of Modern Construction and Maintenance Technology of Chang’an University to develop the RAP factory management process management software. The basic concept of the software is the objective of all parameter data and project quality requirements that will be verified from RAP. The data is input into the software together. The computer compares the input actual data with the basic data preset in the software to generate the recommended compound ratio, regenerant model, regenerant addition amount, etc. The data is generated by the laboratory personnel according to the software. The data is designed and verified by the ratio. The software can further help customers scientifically and efficiently advance the RAP regeneration project.

In addition, Tietuo Machinery owns more than 30 patented technologies with independent intellectual property rights in terms of regeneration equipment and RAP regeneration equipment and processes. In particular, the invention patent entitled “Plant mixing heat regeneration technology and equipment with pre-mixing of hot regenerated material” solves the technical problems that many experts in the industry have long thought about.

The core technology of this patent refers to adding a rejuvenating agent to the heated RAP by stirring the regenerative equipment on the plant and stirring it in the mixing tank. This new method can make the regenerant and RAP The old asphalt is fully dispersed, infiltrated, and miscible. The regenerant reduces the viscosity of the old asphalt and can be better blended with new aggregates, new asphalt, and minerals during the mixing process. In addition, compared with the traditional technology, this process not only shortens the mixing time, but also improves the quality of the mix, while at the same time it increases the overall production capacity of the device. It is understood that the adoption of new primary machine and reclaimer equipment from Tietuo Machinery will increase overall production efficiency by more than 20%.