TESTS OF CONCRETE PAVEMENT SLABS ON CEMENT-TREATED SUBBASES

CONCRETE PAVEMENT SLABS WERE BUILT ON CEMENT-TREATED SUBBASES AND TESTED TO DETERMINE DEFLECTION, STRAIN, AND PRESSURE RESPONSE TO STATIC LOADS. CONCRETE THICKNESS VARIED FROM 3 TO 8 IN. AND SUBBASE THICKNESS FROM 3 TO 9 IN. SUBBASE SURFACE TREATMENTS WERE /A/ CEMENT-SAND GROUT TO PRODUCE BOND, /B/ A POLYETHYLENE FILM TO PREVENT BOND, AND /C/ IN ONE INSTANCE, AN ASPHALT EMULSION. THE PAVEMENTS WERE EVALUATED RELATIVE TO 8-IN. CONCRETE ON A 5-IN. GRAVEL SUBBASE BY MEASURING DEFLECTIONS, SLAB STRAINS, AND SUBGRADE PRESSURES WHEN LOADS WERE APPLIED AT INTERIORS, EDGES, AND JOINTS. BASED ON EQUAL EDGE DEFLECTIONS, THE ABILITY TO CARRY LOADS RANGED FROM 200 PERCENT OF THE STANDARD FOR 8-IN. CONCRETE BONDED TO 5-IN. CEMENT-TREATED SUBBASES, TO 45 PERCENT FOR 3-IN. CONCRETE ON A 3-IN. CEMENT-TREATED SUBBASE WITH AN ASPHALT EMULSION TREATMENT. IT WAS SHOWN THAT BONDED INTERLAYERS INCREASED THE ABILITY TO CARRY LOAD AS MUCH AS AN ADDITIONAL 1/2 TO 1 IN. OF CONCRETE. EXPERIMENTAL DEFLECTIONS AT INTERIORS AND EDGES WERE IN GOOD AGREEMENT WITH THOSE COMPUTED BY THE WESTERGAARD FORMULAS WHEN THE BEARING VALUE OF THE CEMENT- TREATED SUBBASE WAS MEASURED BY A 30-IN. PLATE. /AUTHOR/

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 39-58
  • Monograph Title: Rigid pavement design 1963
  • Serial:

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Filing Info

  • Accession Number: 00206213
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Mar 24 1994 12:00AM