Ph.D. Tezi Görüntüleme

Student: Erol İSKENDER
Supervisor: Asst. Prof. Dr. Atakan AKSOY
Department: İnşaat Mühendisliği
Institution: Graduate School of Natural and Applied Sciences
University: Karadeniz Technical University, Turkey
Level: Ph.D.
Acceptance Date: 25/9/2008
Number of Pages: 128
Registration Number: Di658

       Tests used for evaluation of asphalt mixtures at laboratory are inadequate for prediction of performance because of a lot of parameters act on at the same time. Laboratory compaction methods can not represent road compaction. It is known that Marshall Compaction is not good method simulates in situ compaction. Gyratory compactors are used by various countries but some doubtfulness available related to gyratory angle in this test device.

Any device evaluating of asphalt mix does not contain properties of environmental condition as thawing, freeze, rainfall and so forth at the test time. In this context, a variety of conditioning systems have been presented but efficient of these systems is debated.

       In this research; literature review interested in indirect tensile, indirect tension stregth, repeated creep and French rutting tests, types of pavement distress, conditioning systems, additive types and advantages and disadvantages of some performance tests are presented.

120 Marshall Briquettes and 40 core samples were produced for repeated creep, indirect tension strength and indirect tension tests and 18 specimens were used Marshall Design. Also 8 slabs were produced for French rutting test. Marshall Briquettes were produced same asphalt content with two agent type and non additive. Samples were divided to four groups. Three groups with different conditioning gsytems and control group were tested. Computed tomography was performed indirect tension strength test samples before and after test.

       In general, cracking was started centre of asphalt briquettes and cores. In some samples, cracking was developed combining air voids in samples. That air voids in core samples is smaller and mostly than laboratory samples were observed. Asphalt mixtures prepared laboratory gave beter results than cores. Generally modified mixtures reveal more positive results in view of the creep, rutting and cracking manner.

Key Words: Conditioning Systems, Modified Asphalt Mixtures, SBS, Rutting, Anti-Stripping Agent, Moisture Damage, Computed Tomography