Recommendations for Using Light Loading Tests – Static Loading Tests (SZZ) and Test by Light Dynamic Plate (LDD) and their Correlation for Road Construction

Doporuceni pro vyuzivani lehkych zatezovacich zkousek - staticke zatezovaci zkousky (SZZ) a zkousky lehkou dynamickou deskou (LDD) a jejich korelace pri vystavbe PK

For the assessment of properties and quality of materials (particularly soils, non-consolidated mixtures) and quality of the performed construction works, the road construction works related to the building of road body and building of road pavement uses control methods (confirmative and control tests) which follow the standards and regulations of SJ-PK MD ČR. The standards, particularly ČSN 73 6133, ČSN 72 1006 and ČSN 73 6126-1, are followed by technical guidelines, e.g. TKP 4, TP 170 (minimum deformation moduli of subgrade). This methodology deals with static loading test – (SZZ) in compliance with ČSN 72 1006, method A and light dynamic plate test (LDD) in compliance with ČSN 72 1006. These tests are used for checking bearing capacity of road subgrade and subbase (non-consolidated) road layers and rockfill layers. The methodology is focused on the determination of suitability criteria and interchangeability of using SZZ and LDD, where higher usability of a more easily performed LDD test can help to more effective checking system. This can be reached by using correlation relationships between both tests. The methodology is designed for better understanding of circumstances leading to higher quality of construction expressed by the requirements of the regulations for all participants in a given road construction (here, particularly soil compacting), and consequently, wider use of the mentioned tests, especially LDD tests. In the maze of standards, regulations, requirements, and guidelines, the selected form for Recommendation can be a benefit in practice thanks to its usefulness by all involved parties in road construction (surveying, design, contracting authority/administrator, contractor, supervision), i.e. parties cooperating and coordinated within the performance of works, and not only as a tool of the final evaluation of the construction (earthworks checks). The integration of the above mentioned possibility of wider use of LDD (with the use of correlation relationships) in the regulation basis (Technical guidelines, standards) can be another step to extend the possibilities of checking soil compaction in greater scale.

  • Corporate Authors:

    Transport Research Centre (CDV)

    Líšeňská 33a
    Brno,   Czech Republic  CZ-636 00
  • Authors:
    • ZEDNIK, P
    • MATULA, R
  • Publication Date: 2012


  • English
  • Czech

Media Info

  • Media Type: Print
  • Features: Appendices; Figures; References; Tables;
  • Pagination: 31p

Subject/Index Terms

Filing Info

  • Accession Number: 01518514
  • Record Type: Publication
  • Source Agency: Transport Research Centre (CDV)
  • Files: ITRD
  • Created Date: Feb 26 2014 10:02AM