This article analyzes the limitations of existing regulatory documents for coarse-grained soils when determining the degree of compaction of subgrade soils during road construction. It also highlights the problems that arise in determining the compaction coefficient due to the failure to apply the current GOST 22733-2016 standard to soils with grain sizes larger than 20 mm. Since technical specifications used in international projects contain clear requirements for the density of foundations, a method for adjusting the density of coarse-grained soils based on AASHTO T 224 and ASTM D 4718 standards was studied. Using these standards, correction formulas for the relationship between the site and laboratory densities were calculated using a practical example. The study's results confirm that the implementation of international standards for the density of coarse-grained soils improves the accuracy of compaction assessment. The relevance of improving quality control in road construction, equipping it with modern equipment, and integrating international standards is also substantiated.

subgrade soil, degree of compaction, large fractions, GOST 22733-2016, AASHTO T 224, ASTM D 4718, adjustment method, maximum dry density technical specification, quality control

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