Presenting a Selected Method for the Industrial Use of Roller Concrete through Pavement

Abstract

Several methods have been proposed by organizations and concrete committees to determine the mixing ratios of RCCP. These methods are generally experimental, semi-experimental, and based on theoretical methods. Although, generally, in different methods of mixing ratio design, two approaches of soil density and psychological (efficiency) approach are used. These two approaches are respectively defined based on the optimization of the dry density of the sample by the optimal moisture content and the mixing plan by the absolute volume. In this article, the various methods presented to determine the mixing ratios of roller concrete have been investigated. These methods are experimental and are based on making several test mixtures to determine the optimal design. In recent years and with the development of the application of mathematical models in the concrete mixing design, the use of semi-empirical and theoretical methods instead of experimental methods to determine the mixing design resulted in a significant improvement in the properties of the fresh and hardened roller concrete mixture, as well as reducing the number of experimental mixtures. In this article, the different stages of two recent methods of pavement roller concrete mixing design, including the optimal volume model of the paste (semi-experimental method) and the compressible compression model (theoretical method), are presented, and the assumptions, considerations, and achievements of each are discussed.