Papers by Keyword: Airport Pavement

Abstract: The huge investment in the airport has great significance for economic development and national defense. In the past 20 years, China has built a large number of airports, and its pavements have been exposed to the outdoor environment for a long time, resulting in easy be damaged. Therefore, in recent years, the problems faced by the renovation of airport pavements have become increasingly prominent. Based on the analysis of the core functional indicators of the airport pavement, the paper establishes the hierarchical structure model, functional model and cost model, and finally forms the optimization model of the renovation process decision. The simulation calculation is carried out through engineering examples, and the advantages, shortcomings and their gaps of different renovation processes are obtained, which prove the rationality and effectiveness of the model.

Abstract: Because the airport road surface is directly under the aircraft repeated taking off and landing, the airport road surface should have a good overall structure, high strength, good performance of anti overload fatigue. Under the long action of aircraft, road surface has been damaged. coupled with rising large wide body aircraft and air traffic, airport of old pavement disease gradually increased, the use of a sharp decline in performance, airport pavement performance directly affects the safty of the plane running. Through the research of the capital airport runway to central structure parameters, pavement on the basis of the findings, the distribution of the pavement structure parameters variability is analyzed, and the pavement damage condition of objective evaluation; combined with the drilling core sample laboratory test data and aviation business volume data, scientifically on the pavement damage character analysis, and provides a reference for future similar engineering treatment.

Abstract: In order to reduce the influence of mixing building material quality variability of asphalt mixture. On the basis of Kunming Changshui International Airport West runway mixing by disk data, The proportional difference standard deviation as the index, Study on the quality stability of the mixture of different types of mixing the raw material consumption variability, hybrid variant gradation and the mixing process. The analysis results show that Factors of mixing type, control accuracy and operating method of great quality variability of asphalt mixture; Different variability of various mixing raw materials; Mixture gradation variability index in 9.5mm, 4.75mm and 2.36mm sieve is greater, And the maximum at 4.75mm; Mixing plant start and end of the mixture quality variability than mixing intermediate stage. Finally, aiming at the mixing plant proposed a series of measures to reduce the mixture quality variability.

Abstract: The overhauling, rebuilding and enlarging of airport pavement often produce vast waste concrete. Use of these concrete as recycled aggregates, make recycled concrete. And by adopting the “double-mixed” technique with high quality fly ash and high efficiency admixture, optimizing the mix proportions design of pavement recycled concrete, research its mechanical properties and verify its application effect.

Abstract: Three-dimensional finite element analysis was made on the transverse joint stress state of the concrete pavement slab with void underneath using ANSYS. The transfer effect of dowel bar was discussed with aircraft loaded in the joints. The influence rule of load transfer effect under different dowel bar spacing and dowel bar cross section dimension was compared. Based on the results of finite element analysis, this paper had carried on the experimental study on stress-transferring effect on concrete pavement joints with different location of the dowel bar. The influencing factors of pavement slab transverse joint with void underneath and the resistance of pavement damage on the joint was analyzed. Theoretical analysis showed that in order to reinforce the resistance capacity of local cavity on concrete pavement joint, the largest spacing of transverse dowel bar set shall not be more than 45cm, and the main factors influencing the resistance void ability on the joint are top reaction modulus, coefficient of cavity, the concrete elastic modulus and coefficient of transverse reinforcement.

Abstract: In this paper, theoretical basis and feasibility of implement of utilizing epoxy asphalt in airport pavement construction are analyzed on the purpose of choosing a satisfying material. Afterwards, we tested the high-temperature and fatigue performance of the mixture which is a major concern during airport pavement design , and the results show that the performance of the epoxy asphalt mixture is very excellent compared to conventional asphalt mixture. At the end of this paper the author put forward the problems to be solved and studied of to promote the application of epoxy asphalt mixture.

Abstract: This paper studies the influence of fly ash with different dosage and grades on the crack performance of airport pavement concrete. In order to test airport pavement concrete material accurately and quickly, Dumbbell Test Method was introduced in its early-age from pouring. Dumbbell Test Method is able to evaluate the effect of fly ash with different grades and dosage on volume stability of airport pavement concrete. This paper also studied the mechanism of the influence of fly ash crack performance of airport pavement concrete.

Abstract: Aiming at rapid-repair engineering of airport cement concrete pavement, this paper chooses rapid-hardening sulphoaluminate cement to prepare rapid-hardening sulphoaluminate concrete (RSC) and evaluate its technology performance referring to test methods of Portland cement concrete. The testing results show that RSC possesses excellent workability, good mechanical properties along with abrasion resistance, little shrinkage, and strong bonding with old pavement, which can well meets the requirements of pavement rapid restoration under the condition of not closing airport.

Abstract: In this paper, the influence of fly ash with different dosage and grades on the crack performance of airport pavement concrete was studied. Its exercise new Dumbbell Test Method could make the airport pavement concrete material be tested accurately and quickly during early-age from pouring. The effect of fly ash with different grades and dosage on volume stability of airport pavement concrete was evaluated by Dumbbell Test Method. Also the paper analyzes the mechanism of the influence of fly ash on the crack performance of airport pavement concrete.

Abstract: According to the test results of before and after the aging of asphalt performance,we analyse the dosage changes of the HALS anti ultraviolet ageing agent to improve SBS modified asphalt ultraviolet light resistance aging performance role. The test results show that GW-944 can better improve the ultraviolet resistance of asphalt aging performance, i.e., original sample asphalt have no other negative influence in a certain extent, and at the same time,also improve asphalt fatigue performance, low temperature performance and high temperature performance after the light aging, but the performance improvement needs to be in the right dosage range;Therefore,to the SBS modified asphalt we can use such ultraviolet aging agent for performance improvement,the research achievement for the airport asphalt pavement UV aging provide a technical basis for effective prevention and treatment.