Research On Designing Methods Of Cement Cold Reclying Mixtures Based On VVTM

As one special asphalt pavement maintaining technology, cold recycling has beenwidely studied and applied at home and abroad. However, heavy compaction testing method(HCTM) and static pressure producing specimen method (SPSM) have shown theirinadaptability, which mainly shows the test results cannot reflect the actual performance ofthe cold recycling material, results in cannot offer accuate designing parameters, strengthstandard, gradation and designing method to conduct designing and engineering.Considering all above, it is of great actual significance to carry out study on designingmethods of Cement Cold Recycling Mixtures（CCRM）based on vertical vibration testingmethod (VVTM).Firstly, this paper analyses the principle of VVTM, contrast study is made amongHCTM, SPSM and VVTM, and the adaptablility and reliability of VVTM to CCRM isproved. Secondly, the mechanical properties of CCRM is studied while the influence ofdifferent factors is revealed, the relationship between mechanical indexes is established andthe designing parameters is suggested. Thirdly, the fatigue properties of CCRM is studiedwhile the influence factors is analysed, the fatigue equation is set up and the tensile strengthstructural coefficient is proposed. Then, the effect structural designing parameters todesigning thickness is studied and a base designing thickness is raised. Finally, the strengthdesigning standard of CCRM is discussed by calculation with the theory of ultimate failureand fatigue failure. Based on all the research above, designing method of CCRM is puttingforward and proved by exact example, which will accelerate the maintaining technologydevelopment of asphalt pavement.