LIGHTLY TRAFFICKED ROADS--GREAT BRITAIN

THE REPORT DEMONSTRATES THAT THE PROPERTIES OF LOWGRADE MATERIALS (THOSE WHICH ON THE BASIS OF ESTABLISHED CRITERIA WOULD BE REJECTED FOR USE IN A PARTICULAR PAVEMENT) CAN BE IMPROVED TO ACCEPTABLE STANDARDS BY THE USE OF SMALL PROPORTIONS OF ADDITIVES SUCH AS CEMENT, LIME OR BITUMEN. SATISFACTORY PERFORMANCE MAY ALSO BE OBTAINED BY THE USE OF SOUND SELECTION AND CONSTRUCTION METHODS AND BY THE CONTROL OF FACTORS SUCH AS MOISTURE CONTENT. AGGREGATES WHICH SATISFY TEST CRITERIA BUT SUBSEQUENTLY DECOMPOSE IN SERVICE, MAY BE IDENTIFIED BY A SODIUM SULPHATE TEST OR BY PETROLOGICAL EXAMINATION TO DETERMINE THE SECONDARY MINERAL CONTENT. A PAVEMENT DESIGN PROCEDURE WHICH INCORPORATES STAGE-CONSTRUCTION PRACTICES HAS BEEN DEVELOPED FOR AREAS WHERE A HIGH RATE OF TRAFFIC IS EXPECTED IN THE FUTURE. FOR ASSESSING THE STRENGTH OF SUBGRADE, IT IS RECOMMENDED THAT THE CBR SHOULD BE MEASURED AT THE HIGHEST MOISTURE CONTENT IT IS EXPECTED TO ATTAIN. FULL-SCALE PAVEMENT-DESIGN EXPERIMENTS WITH STABILIZED AND UNSTABILIZED BASES, AND METHODS OF DETERMINING THE OPTIMUM CEMENT CONTENT IN SOIL-CEMENT PAVEMENTS IS DISCUSSED. A PRACTICAL METHOD OF ASSESSING THE RESIDUAL STRENGTH OF EXISTING PAVEMENTS, TO DETERMINE WHEN STRENGTHENING IS REQUIRED, IS CONSIDERED TO BE THE MEASUREMENT OF TRANSIENT DEFLECTIONS UNDER A MOVING LOAD. INVESTIGATIONS ARE IN PROGRESS TO DEVELOP SURVIVOR CURVES FOR TROPICAL CONDITIONS. THE NEED FOR FULL-SCALE EXPERIMENTS TO ASSESS THE PERFORMANCE UNDER TROPICAL CONDITIONS OF DIFFERENT BITUMINOUS MIXTURES IS EMPHASIZED. METHODS OF PREVENTING EROSION OF EMBANKMENTS, ROAD SHOULDERS AND DRAINS ARE REVIEWED. RESEARCH IN THE EFFICIENT USE OF TRANSPORT INVESTMENT FUNDS FOR THE RESOLUTION OF RURAL DEVELOPMENT PROBLEMS IS REPORTED. THE DEVELOPMENT OF MATHEMATICAL MODELS TO PREDICT THE TRANSPORTATION NEEDS OF CERTAIN LEVELS AND TYPES OF AGRICULTURAL DEVELOPMENT IS DISCUSSED, AND METHODS ARE SUGGESTED FOR RELATING GROWTH IN TRAFFIC DEMANDS TO GENERAL SOCIO-ECONOMIC INDICATORS.

• Supplemental Notes:
  • QUESTION VII ANS-7
• Authors:
  • MILLARD, R S
  • White, C B
  • Hudson, N W
  • Sharman, F A
  • Tingle, E D
  • Wilson, R L
  • Woodrow, E H
• Publication Date: 1971

Media Info

• Features: Figures; References; Tables;
• Pagination: 33 p.
• Serial:
  • Perm Intl Assoc Road Congresses Proc
  • Volume: 2
  • Publisher: Xiiith Congress, Tokyo

Subject/Index Terms

• TRT Terms: Additives; Base course (Pavements); Building materials; California bearing ratio; Chemical tests; Erosion control; Investments; Mathematical models; Moisture content; Pavement design; Performance; Rural areas; Socioeconomic factors; Soil cement pavements; Stabilized materials; Subgrade (Pavements); Tropics
• Old TRIS Terms: Low grade
• Subject Areas: Economics; Geotechnology; Highways; Pavements; Society;

Filing Info

• Accession Number: 00233471
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 11 1974 12:00AM