PC CONCRETE TEXTURING

In an effort to determine which method of texturing provides the best skid resistance on portland cement concrete pavement, 10 different texturing methods were investigated: two layer welted burlap (one drag) longitudinal; light longitudinal broom; light longitudinal broom weighted; light longitudinal broom followed by transverse steel comb; transverse steel comb; light transverse fiber broom; transverse heavy nylon bristle broom; single burlap (longitudinal); two sections of (144 sq. ft.) spaced 12 ft.; and single burlap drag 144 sp. ft. with 6-inch frayed end. The procedures for determining the average texture depth of a pavement surface are detailed in the appendix. The skid number was determined and correlated to the texture depth. A linear correlation between texture depth using silicone putty method and the speed gradient was made by computer. Road roughness readings were also taken. It was found that the large changes in skid number, large speed gradients and extremely large wear factors, make the longitudinal burlap drag and broom sections unsatisfactory as a texturing method. In the transverse broom sections, very large skid number changes resulted as the initial texture wore away. They also had large speed gradients and very large wear factors. The transverse steel comb sections performed the best. The texture on these sections is especially good from a hydroplaning aspect. They also have a relatively larger skid life.

Media Info

  • Features: Appendices; Figures;
  • Pagination: 67 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00131063
  • Record Type: Publication
  • Report/Paper Numbers: R-246, MLR-75-3
  • Files: TRIS, STATEDOT
  • Created Date: Apr 21 1976 12:00AM