As a solid waste, graphite tailings (GTs) have caused serious harm to the environment and nearby residents, using GTs as pavement materials can not only solve environmental problems but also promote sustainable pavements. To this end, study experimentally explored feasibility of three kinds (named GT-A, GT-H, GT-W) fillers prepare asphalt mastics analysed their micro properties, mechanical asphalt-filler interaction, dielectric properties. The results show that (GTAMs) less bee-like...

The skid resistance of asphalt pavement is great importance to the driving safety, but deterioration inevitable owing coupling effect traffic loading and climate conditions. existing prediction models were mainly established based on laboratory accelerated polishing tests (for instance Polished Stone Value, PSV), these can only consider influence a single factor; they fail reflect different factors under real service condition. For purpose investigating influences seasonal variation,...

To ensure the safety of infrastructure users, long-term skid resistance is a crucial factor and determined in large by mineralogical morphological characteristics surfacing aggregate. Most studies have investigated these aggregate properties separately without considering interrelation between one another. The objective this study to consider as well fingerprint develop an innovative approach optimize selection process. investigations are based on 11 different types with broad range...

Due to greater durability and lower maintenance costs, concrete pavements are more competitive than asphalt in areas where rigid required. To ensure the surface skid resistance of pavement for driving safety, appropriate textures must be created on surface. Common texturing treatments Germany include exposed aggregate, grinding grooving, sealing methods. investigate influence different methods wearing pavement, samples with six were manufactured this study. The advanced Aachen Polishing...

Autonomous vehicles (AVs) are becoming increasingly popular, and this can potentially affect road performance. Road performance also influences driving comfort safety for AVs. In study, the influence of changes in traffic volume wheel track distribution caused by AVs on rutting distress asphalt pavement was investigated through finite element simulations. A vehicle-mounted three-dimensional laser profiler used to obtain roughness texture information. The vehicle vibration acceleration...

Unmanned driving is the direction of future development in field transportation. The unmanned will cause sensor monitoring and machine control to play a greater role. According road roughness data collected by ground vehicles vehicle dynamics, it great significance establish vehicle–pavement coupling model analyze guide comfort, cargo safety, friendliness. Pavement main external excitation process vehicle. Therefore, three-dimensional (3D) pavement was constructed based on fractal theory...

The cracking of cement-stabilized macadam (CSM) reflects to the asphalt layer, which is one reasons for failure pavement performance and structure. Adding emulsion CSM can effectively prevent formation cracks. primary purpose this article reveal effect emulsions on by adding different contents emulsion. For purpose, tests unconfined compressive strength (UCS), flexural tensile (FTS), elastic modulus, frost resistance were performed with gradations CSM-5 CSM-10 (the maximum particle sizes in...

This paper conducts correctly the mechanical analysis of joints by clinching for various values module and process parameter.The force tensile shearing joint in AL5052 sheets were analyzed; theoretical calculation formulas deduced based on plastic forming principle.Then was carried out FEM simulation experiment; strength obtained test.The results tests consistent with those calculation.

The article studies the problem of calculating loss atmospheric precipitation to earth surface in design culverts and drainage systems objects on highways. analysis current research revealed that existing expressions for determining infiltration do not currently fully take into account physical processes occur during each phase development infiltration. Therefore, purpose this work is develop a more physically justified expression determine rain run off considering water soil. To initial...

In recent years, there has been a significant progress in helicopter traffic, its volume increasing every year. To solve the transport problem of megacities, first all heliports should be built largest cities, with corporate sector as customers, and possibility excursion flights not excluded. UTair-Ukraine (the world’s airline terms fleet operating more than 300 helicopters various models) plans to actively develop business Ukraine. date, only one modern helipad capital Ukraine – Dnipro-1....

The Forming limit diagram (FLD), also known as a forming curves (FLC), is generally used in metal for predicting behavior of metals. purpose the study to clarify difference among FLC tubes with initial wall-thickness under tension-compression strain states using finite element (FE) simulation tube hydroforming (THF) and different instability criteria. Firstly, geometrical models SUS304 stainless steel differences were built by introducing an index 'wall-thickness deviation rate'. Secondly,...

Welded tubes are hydroformed into hollow parts in the automotive industry, engineering equipment, household appliances, etc. However, order to obtain sound products, it is necessary predict rupture behaviour and analyze effects of process parameters on this failure condition during tube hydroforming. The purpose research reveal randomness potential positions marketed SUS304 stainless steel welded by statistical method under hydroforming conditions. Firstly, were experimentally at two loading...

The article considers the calculation of rigid helipad coverings, singlelayer covering modeling in PC LIRA CAD, FEAFAA; cement-concrete covering, temporary coverings metal plates, differential equation membrane curved surface. A great contribution to this work was made by master construction T.V. Blyznyuk.