PROPOSALS FOR CORRECTION OF PAVEMENTS DESIGN METHODOLOGIES IN RELATION TO DESIGN CHARACTERISTICS OF SANDS FOR CONSTRUCTION WORKS

Abstract

In the road industry regulatory framework, there is a noticeable overabundance of governing documents. Many standards developed in the last decade are rather poorly developed, and also completely ignore the continuity with documents related to the subject matter. Unfortunately, contradictions in regulatory requirements for the same type of product are often created on purpose. Sometimes the contradictions are so significant that, for example, the same building material with specific established characteristics can be classified according to related state standards in completely different ways. The described situation, among other things, affected the governing documents that contain information on the requirements for sands.

The article presents the discrepancies between the four state standards in terms of the classification of sands, explains what difficulties the new classification and a set of requirements for the criteria for assigning a group of sand leads to. The problems arising in the design of road pavements are described, including according to the new preliminary national standard PNST 542-2021, in which the requirements for sands proposed by the same technical committee that lobbed PNST 542-2021 (TC 418 «Road sector»).