Method for calculating bituminous pavement heating power control in hot in place recycling process

Abstract

The invention discloses a method for calculating bituminous pavement heating power control in a hot in place recycling process, and aims at providing reliable basis for the bituminous pavement heating power control in the hot in place recycling process through researching the influences, on the bituminous pavement temperature fields, of heating power. An adopted technical scheme is that the method comprises the following steps: 1) establishing a bituminous pavement unsteady state heat conduction model; 2) establishing and simplifying a bituminous pavement unsteady state heat conduction equation; 3) solving the bituminous pavement unsteady state heat conduction equation; 4) simulating bituminous pavement unsteady state heat conduction. According to the method, the relationship between the heating power and the temperature rising characteristics, heating times and thermal power of bituminous mixtures in the bituminous pavement heating link of a bituminous pavement hot in place recycling process is deeply researched on the basis of a heat transfer theory, so as to provide references for the bituminous pavement heating power control.

Description

technical field [0001] The invention belongs to the technical field of highway asphalt pavement regeneration, and in particular relates to a method for controlling and calculating the heating power of asphalt pavement during in-situ heat regeneration. Background technique [0002] As of the end of 2014, the total mileage of China's highways reached 4.4639 million kilometers, of which the total mileage of expressways reached 111,900 kilometers, surpassing the United States to become the world's first, and roads paved with asphalt concrete accounted for a large proportion. With the rapid development of my country's economy and road construction, the tonnage of vehicles continues to increase, and more and more railway freight is turned to fast and flexible road transportation. The increase in traffic volume, the increase in tire pressure, the increasing load and the increase in service life have all accelerated the aging of the road. The asphalt pavement has various degrees of ...

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Problems solved by technology

However, these literatures have not studied the influence of heating power on the temperature field of asphalt pavement during the hot-in-place regeneration process, and have limited guidance on the heating power control during machine design and operation.

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