Combined with the whole process conditions of pavement construction, asphalt pavement temperature control technology can be divided into three categories: high temperature temperature control and disease prevention technology, low temperature insulation and quality stabilization technology, and full-process intelligent monitoring temperature control technology, all of which are suitable for the actual construction of the project. The specific technical points are as follows: 

Precision temperature control technology in high temperature environment (≥35℃) 

Precision control technology of mixing temperature 

Strictly match the type of mixture and set the factory temperature. The factory temperature of conventional asphalt mixture shall be stable at 140℃-165℃, so as to eliminate the volatilization of asphalt light components and premature aging of materials caused by ultra-high temperature mixing, and reduce the hidden danger of high temperature softening of mixture from the source. 

Temperature Control Technology for Peak Offset Construction 

Avoid high temperature peak at noon, select early morning and evening low temperature to carry out paving operation, reduce on-site heat storage time of mixture, delay heat accumulation inside pavement, and avoid rutting, encasing and plastic deformation after molding. 

Dynamic rolling temperature control 

The technology follows the construction principle of "close following, fast pressing and uniform speed", greatly shortens the interval between paving and rolling, completes the operation in the optimal high temperature compaction window of the mixture, strictly controls the number of rolling times, avoids overpressure and under-pressure loosening, and solves the problem of uneven compaction of high temperature mixture. 

Construction Technology of Thin Layer Heat Dissipation 

The layered and thin paving technology is adopted to speed up the heat dissipation speed of the surface layer of the pavement, improve the problems of excessive temperature difference between the surface layer and the interior and serious internal heat storage, and ensure the uniformity of the overall compactness of the pavement and the porosity up to standard. 

Finished product cooling protection technology 

The high-temperature formed pavement shall be sprayed with water to cool down and sealed on site in a timely manner to prevent road deformation caused by early vehicle load rolling and ensure the stable quality of high-temperature construction finished products.

Low temperature environment insulation and temperature control technology (≤5℃) 

Construction threshold management and control technology 

Strictly delimit the red line of low-temperature construction: construction is prohibited when the temperature is lower than-5 ℃ and the wind speed is greater than 6m/s; warm asphalt technology shall be preferred under light wind conditions at about 5℃ to reduce the temperature loss of mixture construction and broaden the window period of low-temperature construction. 

Full process heat preservation technology 

The mixture transportation vehicles shall be covered with thermal insulation quilts to reduce the rapid temperature attenuation during transportation; the pavement base shall be preheated in advance before construction to avoid rapid adsorption of mixture heat by low temperature base and ensure that the initial paving temperature meets the standard. 

Efficient and compact construction temperature control technology 

Streamline site construction procedures, reduce the connection time of each link, quickly complete paving, initial pressing and final pressing operations, rigidly ensure that the initial pressing temperature is not lower than 110℃, and ensure that the compaction quality of mixture at low temperature meets the standard. 

Low temperature maintenance and heat preservation technology 

The pavement shall be covered with thermal insulation and moisture retention materials immediately after molding, so as to alleviate the problems of sudden drop of pavement temperature and excessive temperature difference between inside and outside, and effectively inhibit diseases such as low temperature shrinkage cracks and interlayer bonding failure. 

the whole process intelligent monitoring temperature control technology 

Multi-node temperature real-time monitoring 

Relying on infrared thermal imaging and intelligent sensing equipment, the temperature of the four core nodes of mixture delivery, arrival, paving and rolling shall be monitored in real time, and the data shall be retained to dynamically master the temperature attenuation law. 

Differential precise temperature control matching 

Customized temperature control standards according to different mixture types: AC-20 mixture optimal rolling temperature control at about 152℃, SMA-13 modified asphalt mixture optimal rolling temperature can reach 169℃, to achieve accurate adaptation of materials and temperature control technology. 

Meteorological linkage temperature control 

Real-time monitoring of environmental temperature, wind speed and other meteorological parameters on the construction site, timely avoidance of adverse conditions such as strong wind and strong cooling, elimination of construction quality hazards caused by abnormal temperature and wind speed from the source, and formation of a full-chain closed-loop temperature control system.