How to choose the label of asphalt for asphalt pavement

、? The asphalt label of asphalt pavement surface should be selected according to climate conditions, construction season, pavement type, construction method and mineral aggregate type. Other asphalt layers can use the same label or different labels. Usually, the upper layer of the surface layer should use thicker asphalt, and the lower layer or connecting layer should use thinner asphalt. When the asphalt label does not meet the use requirements, asphalt with different labels can be mixed, but the technical indicators after mixing should meet the requirements. List of instruments and equipment related to pavement detection: eight-wheel pavement evenness tester, pavement vibration compaction molding machine, electric sand laying instrument, pavement seepage tester, pavement pendulum friction coefficient tester, pavement deflection tester, asphalt rutting tester, asphalt rutting sample molding machine, pavement coring machine and bearing plate test geotechnical instruments and equipment list: standard sieve, vibrating screen, hydrometer, electronic balance, oven, photoelectric liquid plastic limit tester, electric compactor and pavement material strength tester. CBR tester, shaking table tester, lever pressure tester, bearing plate or pavement material strength tester and its accessories, triaxial tester, free expansion tester, soil moisture tester, direct reading calcium tester, electric demoulding machine. List of aggregate instruments for earth-fetching ring cutter: standard sand and gravel sieve, vibrating screen, crushing value tester (cement concrete and asphalt pavement), press, Los Angeles grinder, accelerated grinder, pendulum friction coefficient tester, impact tester, needle gauge, vernier caliper, sand equivalent tester, electronic balance, oven, fine aggregate angularity tester, length measuring instrument and accessories, fine aggregate methylene blue test stirring device, sand filling barrel volume stone filling instrument: electric stone cutter. List of cement mortar instruments: electronic balance, cement mortar mixer, cement standard consistency tester, Reynolds clamp tester, boiling box, cement mortar mixer, cement mortar tamping table, standard constant temperature and humidity curing box, electric bender, press, negative pressure screen analyzer, cement mortar fluidity tester and air permeability. List of cement concrete, mortar and admixture equipment: mortar setting time tester, cement specific length tester and cement standard curing room: standard curing room, cement concrete mixer, cement concrete standard shaking table, press, bending test fixture, cement mortar consistency tester, cement mortar layering tester, mortar fluidity tester, slump cone, capacity cylinder, air content tester, concrete penetration resistance tester, dial indicator, analytical balance and oven. Hydrometer, test screen, splitting test fixture, refrigeration equipment, concrete dynamic elastic modulus tester, concrete abrasion tester, anode polarimeter, acidity meter and screw micrometer. List of complete sets of equipment in commercial concrete laboratory: direct reading cement mortar air content meter, cement compressive furniture, cement sand filling cylinder, cement ocean cylinder, Vicat meter, computer Vicat meter, chloride ion analyzer, mortar consistency meter, digital cement specific length meter and cement mortar fluidity meter. Cement electric bender, cement mortar tamping table, cement mortar mixer, cement paste mixer, digital display cement mortar setting time tester, mortar density tester, pliers tester, boiling box, cement free calcium oxide tester, digital display liquid crystal cement Boehner permeability specific surface instrument, electric cement Boehner permeability specific surface instrument, mortar permeameter, mud viscometer, mud content tester, mud hydrometer, mortar vertical shrinkage and expansion instrument, cement negative pressure screen analyzer, Multifunctional mortar penetrometer, concrete penetration resistance meter, concrete impermeability meter, concrete single horizontal shaft mixer, concrete vibrating table, concrete magnetic vibrating table, concrete pressure exudation meter, concrete reinforcement printer, electronic reinforcement meter, reinforcement grip tester, concrete drilling coring machine, concrete horizontal shrinkage and expansion tester, concrete shrinkage and expansion compensator, concrete slicer, concrete specific length meter, concrete rapid strength tester, air content of improved concrete method, Gravel tester, steel bar position tester, steel bar protective layer tester, concrete direct reading air content, concrete simulated daily air content, digital display concrete air content, steel bar corrosion tester, constant current potentiostat, anode polarization tester, anchor tension tester, concrete rebound tester, digital display rebound tester, sound print rebound tester, slump tester, concrete elastic modulus tester, automatic rock. Concrete trowel, concrete electric flux, concrete vacuum saturator, electric coring machine, concrete Weibull consistency meter, concrete cement standard curing box, concrete cement standard curing room, hair dryer drying box, low-temperature test box, low-temperature freezer, geotextile synthetic material equipment list: geotextile thickness gauge, geotextile thickness gauge, geotextile effective aperture gauge, geotextile dynamic anti-perforation instrument, geotextile drop hammer penetrometer, geotextile Geotextile horizontal permeameter, geotextile permeability coefficient tester, geotextile hydrostatic pressure tester, geotextile comprehensive strength tester, computer geotextile comprehensive strength tester, geotextile direct shear drawing friction coefficient tester, geotextile disc sampler, geotextile drawing friction coefficient XII. What is a standard test and what requirements should be implemented? Standard test is the data collection of internal quality of various projects before construction, and it is the scientific basis for controlling and guiding construction, including various standard compaction tests, aggregate gradation tests, mix ratio tests, structural strength tests, etc. The standard test shall be carried out according to the following requirements: (1) The contractor shall first complete the standard test, and submit the test report and test data to the supervision engineer's central laboratory for approval before each project starts or within a reasonable time. The test supervision engineer shall send test supervision personnel to participate in the whole process of the contractor's test and conduct effective on-site supervision and inspection. (2) The supervision engineer's central laboratory shall conduct parallel inspection (contrast) tests at the same time or after the contractor's standard tests to confirm, deny or adjust the parameters or indicators of the contractor's standard tests. 13. If the coarse aggregate used in asphalt pavement is acidic, what anti-stripping measures should be taken to ensure the adhesion between coarse aggregate and asphalt? 1, dry ground slaked lime or quicklime, cement as a part of the filler, and its dosage should be 1%-2% of the total mineral aggregate; 2. Adding anti-stripping agent into asphalt; 3. Coarse aggregate shall be treated with lime slurry before use. 14. what is the scope of application of sand filling method and what should be paid attention to during testing? Scope of application: It is suitable for measuring the density and compactness of compacted layers of various materials such as base (subbase), crushed stone pavement, subgrade soil, etc. It is also suitable for asphalt surface treatment and density and compactness detection of asphalt penetration surface, but it is not suitable for density detection of materials with large pores such as rock-filled embankment. 15. A soil sample contains both a certain amount of coarse particles and a certain amount of D.