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Construction of Superpave Mixture


Hydrostatic drive roller drum light 2 times. The results in Table 2. Test section of Table 2 test results verified by the test section,[link widoczny dla zalogowanych], you can work out the type of the initial mixture of basic compaction process, the initial concrete steps are as follows: a) paving mixtures can be tracked after the vibratory roller compaction, static advance pressure, vibration back pressure, compaction speed is usually such as human walking speed, high frequency low-amplitude surface layer compaction method, the higher the frequency of the surface layer of the better compaction, while the lower the impact on the smaller. Vibratory compaction under high temperature by 243 times the vibration compaction mixture at high temperature (> 120C) to achieve a better state of compaction effect on the compaction process of spray water to minimize the amount of steel wheel roller, as long as to ensure non-stick round. b) When the temperature drops to about 115C, the use of vibratory rollers may have pushed the phenomenon of compaction are no longer growing, then the regulator can use the rubber tire roller 3 to 4 times. c) When the temperature is below 93 ℃ can be used when the drum rollers, drive light 2 times, to complete the entire compaction process. With the mixture compaction process of continuous adjustment and improvement, as well as the continuous progress of compaction machinery, highway construction in the Thai song of the SBS modified asphalt used by the analysis of the test section, followed by shared use of bold vibration compaction machine shop, the first trip away static pressure, and achieved very good results. Summarized as \In the compaction process problems that need attention: a) Superpve mixture ratio of the conventional dense grade asphalt with more sensitive and timely materials, dynamic control and adjust the gradation of the compacted mixture is very favorable; b) according to the test segment compaction situation and ensure the mixture does not occur when rolling at high temperatures push phenomenon, according to a reasonable length of compaction speed assignments,[link widoczny dla zalogowanych], roller number, location distribution, so as to ensure that when the mixture is fully compacted at high temperatures; c) When the temperature is reduced, generating mixture over rolled steel wheels,[link widoczny dla zalogowanych], and then use the steel wheels is harmful at this time should be used tire roller compaction. Rubber tire roller generally do not need watering, at the beginning of 3:1 oil and water mixture can be wiped tires, tire temperature,[link widoczny dla zalogowanych], etc. no longer needed after the non-stick round, tire pressure should be provided tire rollers, not too low; d) to Note that the amount of watering, minimizing the cooling rate of mixture, especially in the fall or windy weather. Superpave mixture compaction is not fixed, each project should be paved before the start of the test section, to test whether the nature of mixture volume and evaluation of satisfaction with paving and compaction technology. The test section must be used in the construction technology program, including asphalt mixing plant, paver, parameter settings, personnel and vehicle body construction technology. The mixture should also test the surface the surface of service features, such as friction coefficient and the texture depth and permeability coefficient,[link widoczny dla zalogowanych], in order to test integrated services mixture pavement performance. Through the test section of pavement to the construction process and mixture gradation to make timely adjustments to achieve the best quality pavement. 4 Conclusion From the above mixing, paving the compaction of the Superpave mixture made a preliminary exploration, which are established in the province based on the test road was paved, the construction technology used to explore the success we've paved over a 200km The Superpave mixture physical works, have achieved very good results. (This editing UK) ConstructiveTechniqueofSuperpaveMixtureMaShijieWangLinShandongTransportationResearchInstitute (Jinan250031) AbstractSinceSuperpavemixturehasasignificantdifferencefromtraditionaloneintermsofdesigning, performanceindexesandgradingsystem, theconstructivemethodsofitisnotthesame. SomeresearchonSuperpaveconstructivemethodshaeenmadeandafeasibleplanofconstructionwaspresentedasaresult. Keywords: Superpave; HMA; Constructivetechnique
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