THEORETICAL ANALYSES OF SUBGRADE MOISTURE UNDER AUSTRALIAN ENVIRONMENTAL CONDITIONS AND THEIR PRACTICAL IMPLICATIONS

THE MATHEMATICAL MODELS PRESENTED IN THIS PAPER CAN BE USED TO ANALYSE MOISTURE CHANGES THAT TAKE PLACE IN PAVEMENTS AND SUBGRADES OF SEALED ROADS. AGREEMENT OF A WIDE RANGE OF TYPICAL ANALYSES FOR THE AUSTRALIAN ENVIRONMENT, WITH THE RESULTS OF AN EARLIER AUSTRALIA-WIDE FIELD INVESTIGATION INCREASES THE VALIDITY OF THE CONCLUSIONS. BRIEFLY, THESE ARE: (A) THE SOIL UNDER SEALED PAVEMENTS, EXCEPT NEAR THE EDGES, IS ISOLATED FROM RAPID CHANGES AND TENDS TO A STABLE EQUILIBRIUM MOISTURE DISTRIBUTON; (B) THE PRESENCE OF THE SEALED PAVEMENT HAS LITTLE OR NO EFFECT ON THE PORE SURFACE; (C) THE STABLE EQUILIBRIUM MOISTURE CONDITIONS CAN BE DETERMINED BY HYDROSTATIC EQUILIBRIUM WITH THE PROFILE BELOW THE DEPTH OF SEASONAL VARIATIONS; (D) THE EDGE EFFECTS, NAMELY, THE LATERAL EXTENT OF THE SEASONAL VARIATIONS UNDER THE EDGES OF THE SEAL ARE GENERALLY LIMITED TO 2-3 FT AND THERE IS NO FUNDAMENTAL REASON WHY THESE EFFECTS CANNOT BE REDUCED FURTHER OR ELIMINATED ENTIRELY. /TRRL(A)/

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 32-49
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00237672
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: TRIS, ATRI
  • Created Date: Jun 11 1972 12:00AM