Determination of maximum soil density
Abstract
Currently in Ukraine there is a normative document DSTU B B.2.1-12: 2009 Soils Method of laboratory determination of maximum density. According to this standard, the maximum soil density can be determined by 3 methods. The maximum soil density at optimum humidity was experimentally determined by the standard method and the Proctor method. A comparison of these methods for the construction of buildings and structures. These methods are also used in the construction of roads.
When determining the maximum density at optimum humidity by the standard method, the maximum density was 1.95 g/cm3, and the optimum humidity was 12.13%.When determining the density of the Proctor, the maximum density was 1.89 g/cm3, and the optimum humidity is 8%.When determining the modified density according to Proctor, the maximum density was 1.98 g / cm, and the optimum humidity was 7.6%.
In the study of the modified Proctor density compared to the method determining the Proctor density, the number layers increased to 5 at and the number of strokes per layer to 59 at layer-by-layer compaction.
Due to the use method of determining the modified density by Proctor, it is possible to obtain higher density values by 1.5% at lower humidity of 7.6% compared to the standard method of determining the maximum density at optimal humidity. Compared to the Proctor density method, the density is 4.8% higher and the humidity is 5% lower. This will lead to better soil compaction in the construction of buildings and structures, roads and airfields.
Comparison of different methods has shown the best advances in modern methods of modified force for Рroctor. This can be a much larger number of strokes with a larger number layers when using and the existence of soil chips that were favorable.
The Proctor method proved to be more accurate in determining the maximum density. When using the modified Proctor method, the density is the highest. Thanks to the use of a modified Proctor method it is possible to achieve better soil compaction in construction.
