Thin Mortar Overlay for Restoring Friction on Concrete Pavements


  • The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal


Title: Thin Mortar Overlay for Restoring Friction on Concrete Pavements

Author(s): C. F. Scholer

Publication: Special Publication

Volume: 93


Appears on pages(s): 159-168

Keywords: concrete pavements; evaluation; friction; mortars (material); performance; resurfacing; skid resistance

Date: 9/1/1986

Vehicle tire friction with pavements is an essential element of highway safety. On concrete pavements this friction depends upon the macro texture of the pavement surface the Some concrete capacity composition and texture of the fine aggregate. pavements lose enough of their tire friction to cause concern for safety before the pavement's structural life is expended. This PaPe r desc ribe s a techn ique to apply a Thin Mortar Over-for Fric tion, TMOFf to the surface of an existing pavement. lay Portland cement, especially emulsion selected admixture fine aggregate and a mortar having styrene-butadiene produced a excellent properties for friction and for adherence to the under-Indiana evaluations have shown both blast furnace slag and expanded shale (structural lightweight) aggregate to pro- lying pavement. vide exceptional friction properties even after traffic has severely worn the macro texture of the pavement. Recommendations incl ude cleaning pavements with shot equipment then applying a ve ry thin mortar layer having a thickness of 3/16 inch (4.8mm). A flowable mortar must be brushed An asphalt slurry spreader was adapted bl nomiastnal into the concrete surface. successfully to both brush and "squeege" the final surface. Ligh was t traffic could move on the s urface within 8 hours but 24 requ ired for he avY 9 sto pping traffic. Cost of materials hours vary with the cost of the aggregate but is usually between $1.00 and $1.75 (US) per sq. yard ($1.22 and $2.13 per sq. meter). Excel1 ent skid number s were obtained and after more than five years service. remain satisfactory