Correlación entre el CBR y las propiedades índice y mecánicas en suelos granulares, de las parroquias Huachi Grande y Santa Rosa, cantón Ambato, provincia de Tungurahua

Abstract

The present work is of an experimental nature and was intended to establish reliable correlations between the laboratory CBR with the index and mechanical properties of soils of Huachi Grande and Santa Rosa parishes. The presented equations a correlation coefficient, r, greater than 0.50 and were applied to establish the CBR value of a selected road based on the properties of the soil in that area. Four types of flexible pavements were designed, whose variations were the value of laboratory CBR and the CBR obtained through correlations, in addition to the considerations of low and high traffic. Three roads were selected per parish to determine two points adjacent to each road, on opposite sides or in the same direction separated with a minimum of 500 meters to make the corresponding calicatas, giving a total of 12 samples taken. For in-situ tests, the Dynamic Penetration Cone (DCP) and the Ottawa Cone and Sand for Field Density were used. In the laboratory, Granulometry, Atterberg Limits, the Determination of Specific Gravity, the Compaction Test for Modified Proctor “B” and the CBR test were performed. Once the test data of each sample was processed, they were correlated with Excel by statistical methods, to establish that there is an association between the laboratory CBR with the index and mechanical properties, because the design thicknesses did not vary using the CBR of laboratory or the one obtained through the equations.