Study On Factors Influencing Paving Of Asphalt Mixtures And Development Of Real-time Monitoring System

At present,the quality control of the construction for asphalt pavement in our country is control afterwards in main,what is impossible to judge the quality of asphalt pavement construction process in real time,but as a key part in the construction of pavement,the asphalt mixture paving has very important effect on the operation performance of the pavement.Therefore,it is necessary to strictly control the quality of paving process,so as to ensure the quality of pavement construction.In the process of paving,the main influence parameters of pavement forming quality include the operation parameters of the paver,the mixture and environment.This paper mainly studies the speed of paver,frequency and amplitude of vibration system,paving temperature and other parameters on the influence of mixture paving quality.through on-site and laboratory tests,we get the influence rule of paving speed,paving temperature and paver vibration system on the quality of mixture paving.According to the paving speed,flatness influence degree of compaction on the pavement,determine the reasonable control range and stability index of paving speed;according to the spreading effect of temperature on the mixture cooling rate and temperature segregation,puts forward the effective compaction temperature of mixture paving temperature prediction formula and put forward the temperature segregation control method based on the SPC control chart.Through the study,we put forward the reasonable control of the paving speed,for SMA-13,the paving speed should be controlled in the range of 1m/min~3m/min,paving speed standard deviation is less than 0.25m/min;for AC-20,paving speed should be controlled in the range of 2m/min~4m/min,paving speed standard deviation is less than 0.3m/min.At the same time according to the mixture and cooling process and paving temperature monitoring result,establish a model to predict the effective compaction time,whether the effective compaction time judgment in the paving process meet the construction requirements.And on the basis of real-time monitoring system of asphalt pavement paving quality,we collect the pavement construction data in real time,and by the qualified rate,SPC control chart and the quality of process data statistical method,we analysis data in real time,and visualization and output to realize the automatic alarm over threshold.We forming a set to be able to real-time monitoring data evaluation system of paver work and asphalt mixture parameters,processing the construction process data,feedback of job quality information in realtime,and it is able to put forward reasonable solution to the corresponding problem.