New Criterion for Continuous Compaction Control Systems by Soil Vibratory Rollers

This chapter substantiates the need to improve methods for monitoring the quality of compaction of road-building materials and the use of continuous compaction control systems in the composition of vibratory rollers to ensure documentation and quality control of 100% of the compaction surface. The criteria of soil compaction are considered, based on which the work of modern systems for the continuous compaction control by Ammann/Case, Bomag, Caterpillar, Dynapac, Sakai and Volvo rollers is based. The importance of considering the different modes of operation of the vibration roller: constant contact, partial separation and double jump and others, as well as indications of the transition of the drum to the undesired mode of oscillations double jump, is indicated. The characteristics of compaction indicators are analyzed, the calculation of which is based on the analysis of the acceleration spectrum of the vibration roller, as well as indicators considering the strength characteristics of the material to be compacted. The necessity of creating a domestic continuous compaction control system by vibratory rollers has been substantiated. A new promising compaction criterion for such a system is presented. The use of the proposed CV index makes it possible to fine-tune the continuous compaction control systems of the vibratory roller to a specific type of material. It also allows improving the sensitivity of the continuous control system to changes in the characteristics of the soil being compacted.