Provstraeckor med Cementbruksbunden Makadam (CM). Produktionsfoersoek vid Tumba och Uppfoeljning av Provstraeckor vid Norsholm och Balsta (Test Sections with Cement-Grouted Macadam (CM). Production Test at Tumba and Results from Test Sections at Norsholm and Balsta): Fid-Bau Portal

Provstraeckor med Cementbruksbunden Makadam (CM). Produktionsfoersoek vid Tumba och Uppfoeljning av Provstraeckor vid Norsholm och Balsta (Test Sections with Cement-Grouted Macadam (CM). Production Test at Tumba and Results from Test Sections at Norsholm and Balsta)

B. A. Hultqvist / B. Carlsson

Abstract

Adaptation to the EC's load regulations will permit vehicles with increased axle loads and tyre pressures on Swedish roads. This will set higher demands on the load distribution properties of the pavement. On heavily trafficked roads, there is consequently an increasing trend towards more rigid pavements, requiring a roadbase with improved properties. This project examines the possibility of using cement-grouted macadam (CM) as a roadbase. The aim of the full-scale tests was partly to test a new working technique and production methods for laying a CM roadbase and to follow up the results of earlier CM test sections. The study shows that a CM roadbase of high quality can be constructed if the prescribed mortar is used, together with the improved spreader equipment developed by the National Road Administration. However, the production method should be refined to improve the evenness of the CM roadbase.