Study On Quality Control Of Asphalt Pavement Construction Of Penglai To Qixia Expressway Project

Times In the process of highway construction,the quality of asphalt pavement can be effectively controlled,and it is directly related to whether there will be early damage.Combining with engineering practice,the influencing factors on the quality of the asphalt pavement construction,there are more need through a number of test index to reflect,the indicators will be different degrees of influence to the pavement quality.Want to realize effective control of highway asphalt pavement construction quality,but also in combination with the engineering practice of pavement construction quality variability analysis,so as to put forward effective means for the pavement construction quality control.Based on this understanding,based on the analysis of related literature,on the basis of combination of penglai to qixia construction of highway engineering construction,the highway asphalt pavement construction of asphalt materials,and aggregate mixture quality control question for analysis,found that project using asphalt penetration,softening point of the coefficient of variation of relative slightly larger,mainly by raw material,production process,the influence of storage conditions and test accuracy;Aggregate slopes with the variation coefficient single grain big situation,level of asphalt with aggregate coefficient of variation range between 0.48 to 2.09,with engineering using aggregate slopes not find a single grain specification problems related to secondary crushing aggregate way;The engineering use of asphalt mixture gradation,asphalt content,mixture will play temperature,paving segregation and rolling compaction degree of variation,the influence of such factors as the need to strengthen the various construction stages to effectively control the segregation,temperature etc.In view of the dynamic control of asphalt pavement construction quality,the control factors of different construction processes need to be clarified,and the construction quality control and management can be realized by strengthening the monitoring and management.The dynamic quality control index system can be established before and during construction from the perspective of dynamic control demand.This paper USES Delphi method to collect expert opinions,and then completes the establishment of judgment matrix with improved analytic hierarchy process,and finally calculates the weight of system indicators,thus providing a basis for the selection of key control indicators of dynamic control system.Through mathematical statistics of the selected indexes,a scientific dynamic control method is put forward,which can point out the direction for developing the function of dynamic control system of asphalt pavement construction quality.Combination of penglai to qixia highway asphalt pavement construction quality control requirements,by using quality control chart was proposed in this paper for dynamic control ofconstruction quality of technical methods,we collected data through the construction of quality control diagram,to determine the construction process is stable,and then realize the control of construction quality difference.However,considering that the expressway asphalt pavement construction contains a lot of inspection indicators,the dynamic control cannot be realized.Combined with the representation of the index selection,feasibility principle,such as on the quality of asphalt pavement construction dynamic control chose asphalt content,grading,compaction degree,flatness and thickness of the five key indicators.From the dynamic control of the compaction degree,flatness and thickness of asphalt pavement,it is possible to strengthen the difference control of construction quality through index data analysis.Considering the engineering construction need to go through all kinds of mixture in sieve and readjust the production mix,difficult to conduct quality control chart in the practical work of drawing and put forward the dynamic control system of highway asphalt pavement construction quality,the use of system building database implementation of control chart data refresh in time,and using the method of "mobile quality control line" mu + 2 sigma as construction quality control chart,the lower limit.Microsoft SQL Server was adopted to build the database,and the functional design of the system was implemented by VC++,and the design and implementation of dynamic control software with high degree of automation was completed.Using the construction data of penglai to qixia expressway project as sample data,the system can be used to realize the effective dynamic control of the key indexes of asphalt pavement construction quality.