RIGID PAVEMENTS - GREAT BRITAIN

IMPROVED TECHNIQUES FOR USING THE SLIP-FORM PAVER AND CONVENTIONAL PAVING TRAINS ARE DISCUSSED. THE PROTECTION OF THE SUB-GRADE FROM CONSTRUCTIONAL LOADS AND FROM MOISTURE PENETRATION IS USUALLY PROVIDED BY A SUB-BASE OF EITHER A GRANULAR MATERIAL OR LEAN CONCRETE, BUT CEMENT STABILIZED MATERIALS ARE ALSO USED. THE NECESSARY THICKNESS OF THE SUB- BASE IS RELATED TO THE TYPE OF SUB-GRADE, THE SUB-BASE MATERIAL, AND THE WEIGHT OF THE CONSTRUCTIONAL TRAFFIC. GREATER ACCURACY IS NOW ACHIEVED IN THE SHAPING OF THE SUB- BASE BY LAYING THE SUB-BASE MATERIAL WITH WIRE-GUIDED MACHINES AND THIS ACCURACY LEADS TO A REDUCTION IN THE WASTED CONCRETE NEEDED TO MAKE UP IRREGULARITIES IN THE SUB- BASE. THE EMPIRICAL METHOD OF PAVEMENT DESIGN CONTINUES TO BE USED. WITH LITTLE CHANGE IN THE REQURIED JOINT SPACINGS, JOINT ASSEMBLIES HAVE NOW BEEN DEVELOPED WHICH CAN RAPIDLY SET ACCURATELY AND RIGIDLY. EXPERIMENTAL WORK IS BEING CONDUCTED ON TEMPERATURE VARIATIONS IN CONCRETE SLABS. OBSERVATIONS ARE CONTINUED ON THE EXPERIMENTAL PRESTRESSED CONCRETE ROADS AT WINTHORPE. ESTABLISHED METHODS OF MIX DESIGN USED ARE EMPIRICAL AND TRIAL MIXES ARE USUALLY MADE TO DETERMINE THE MOST SATISFACTORY MIX TO BE USED. THE SURFACE TEXTURE OF A CONCRETE ROAD IS APPLIED BY BRUSHING THE SURFACE IN A TRANSVERSE DIRICTION AND TESTS HAVE BEEN DEVELOPED WHICH MAKE IT POSSIBLE TO ASSESS THE SKIDDING RESISTANCE PROPERTIES OF THE APPLIED TEXTURE. A RE- ASSESSMENT IS BEING MADE OF CONSTRUCTION TECHNIQUES USED ON MINOR ROADS. AIR ENTRAINING AGENTS ARE USED TO PROVIDE RESISTANCE TO FROST AND DE-ICING SALT.

• Supplemental Notes:
  • Noiv-6, pp 4-7, 4 TAB
• Authors:
  • Sharp, D R
• Publication Date: 1967

Media Info

• Serial:
  • Perm Intl Assoc Road Congresses Proc
  • Publisher: Xiiith Congress, Tokyo

Subject/Index Terms

• TRT Terms: Air entraining agents; Base course (Pavements); Cement treated soils; Concrete pavements; Construction management; Experimental roads; Granular materials; Joints; Lean concrete; Mix design; Pavement design; Pavements; Pavers; Paving; Prestressed concrete; Skid resistance; Slabs; Slip form paving; Spacing; Subbase materials; Subgrade (Pavements); Surface course (Pavements); Texture; Thickness
• Uncontrolled Terms: Cement treated bases; Laying
• Old TRIS Terms: Brushing; Joint; Lean mix concrete; Thickness design
• Subject Areas: Construction; Geotechnology; Highways; Pavements;

Filing Info

• Accession Number: 00205543
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 3 1994 12:00AM