Novel hot air-microwave composite in-place hot recycling complete set and construction technology thereof

Abstract

The invention discloses a novel hot air-microwave composite in-place hot recycling complete set. The novel hot air-microwave composite in-place hot recycling complete set comprises a hot air heater (1) arranged at the foremost end of the complete set, wherein a microwave heater (2) is arranged at the back end of the hot air heater (1); a microwave heating milling machine (3) is arranged at the back end of the microwave heater (2); a dump truck and multifunctional feeder adding combination (4) is arranged at the back end or on the side surface of the microwave heating milling machine (3); a remixing recycling machine (5) is arranged at the foremost end of the complete set. The invention further discloses a construction technology of the novel hot air-microwave composite in-place hot recycling complete set. Through the novel hot air-microwave composite in-place hot recycling complete set and the construction technology thereof, provided by the invention, accurate control of the modular zone heating temperature is achieved and the uniformity of a whole heating surface is guaranteed; the novel hot air-microwave composite in-place hot recycling complete set has good adaptability to large-bend construction, large-angle climbing, transfer transportation and the like; power-variable and intermittent heating of a modular heating wall and machine group control are achieved, the heating efficiency is high, the heating depth is high and adaptability to the disease condition is strong.

Description

technical field [0001] The invention relates to the technical field of road maintenance equipment, in particular to a novel hot-air microwave composite heat-in-place regeneration complete set, and also relates to the construction process of the novel hot-air microwave composite heat-in-place regeneration complete set. Background technique [0002] The huge maintenance workload of national and provincial arterial highways, especially expressways, the high standard of maintenance engineering quality and the maintenance operation environment under the condition of super-large traffic volume prompt us to seek a new maintenance method-in-place thermal regeneration, which is a kind of The special hot-in-place regeneration equipment heats and mills the asphalt pavement, and then mixes certain new aggregates, new asphalt, regenerants, etc. After mixing, paving, rolling and other processes, the surface can be repaired to a certain depth at one time. A range of technologies for the re...

AI Technical Summary

Problems solved by technology

[0004] (1) Scorched road surface, vegetation destruction, environmental pollution

Most pavement heaters use fuel / gas open flame heating, gas infrared heating or extensive high-power diesel hot air circulation heating. The heating temperature of asphalt pavement is not easy to control accurately, which will easily cause aging and coking of asphalt pavement, and the road performance of pavement after regeneration will decline. ; The high temperature and hot smoke around the construction will easily cause the green belt and trees to be scorched, accompanied by a large amount of toxic blue smoke, polluting the environment;

[0005] (2) Insufficient heating depth and poor adaptability to working conditions

The heating depth of the existing pavement heating machine is 30mm-50mm deep, resulting in the regeneration thickness being limited to 30mm-50mm, the deep-seated diseases cannot be treated well, and the adaptability to working conditions is poor;

[0006] (3) The temperature gradient between layers is large, and the aggregate is easily damaged during milling

According to statistics, the temperature of the asphalt material in the upper 10mm-20mm thick of the asphalt pavement is too high (up to 240°C), but the temperature of the asphalt material in the lower 30mm-50mm is only 70°C-80°C, with a large temperature gradient between layers and uneven heating; Moreover, due to the low temperature of the bottom layer, it is easy to cause damage to the aggregate gradation in the asphalt material during the milling process (whitening material appears), which affects the regeneration quality;

[0007] (4) Step-by-step heating and layered milling process have a large heat loss, which is time-consuming, laborious and expensive

[0008] (5) It is difficult to add new materials, the heat loss is large, and the remixing and recycling machine is frequently intermittently operated, which affects the regeneration quality

At present, the addition of new asphalt mixture is mostly completed by transfer dump trucks, and after the road surface is heated and milled, a 200mm-300mm thick pile will be gathered up. Before the transfer dump truck is added, multiple road surface heating machines and heating milling machines need to Move forward 20m~30m, then transfer the dump truck across the thick material pile, ride on the material pile to feed into the hopper of the remixer recycling machine, causing the remixer recycler to stop working frequently, and thick material after feeding The stockpile is driven out, and then multiple heating machines and heating milling machines return to their positions to resume operations. This process of adding materials has defects such as difficulty in adding materials, long intervals, large heat loss, and poor regeneration flatness;

[0009] (6) At present, a certain proportion of new asphalt mixture is not added in the remixing process of the remixing and overlaying process of the hot-in-place regeneration unit, but the regeneration layer is formed by adding an appropriate amount of regenerant after remixing and paving, and then the regeneration layer A certain thickness of brand-new asphalt mixture was paved on the top, and the real double-layer paving was not realized.

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