1 / 29

Micro-surfacing

Micro-surfacing. Sponsored by: Minnesota LTAP Center Presented by: Michael Marti, P.E. SRF Consulting Group, Inc. Dan Wegman, P.E. SemMaterials. History of Micro-surfacing. Developed in Europe in 1970’s Introduced in U.S. in 1980 Now used in more than 30 states

jolene-sutton
Download Presentation

Micro-surfacing

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Micro-surfacing Sponsored by:Minnesota LTAPCenter Presented by:Michael Marti, P.E. SRF Consulting Group, Inc. Dan Wegman, P.E. SemMaterials

  2. History of Micro-surfacing • Developed in Europe in 1970’s • Introduced in U.S. in 1980 • Now used in more than 30 states • Used for rut filling and texturing

  3. What is Micro-surfacing? • Surface treatment 3/8” to 1/2” thick • Sometimes mislabeled as a polymer modified slurry seal • Advantages over slurry seal are • Chemical breaking process • Faster curing time • Can be applied at night • Can be placed in a thicker layer

  4. What is Micro-surfacing? • It is a mixture of • Polymer modified emulsion • Crushed aggregate • Mineral filler • Water • Additive

  5. Micro-surfacingPaving Machine Mineral filler Crushed Aggregate Polymer-modified Emulsion, Water, and Chemical Additive Conveyor Mixer . Micro-surfacing mix Water Spraybar Spreader box

  6. Micro-Surfacing Application Cementadditivewater PolymerModifiedEmulsion Crushedaggregate Water Flows Spreaderbox Mixture Brown & Homogeneous Breaking Time 60 to 120 seconds Mixture Black Mixing time15 to 45 seconds Direction Traffic in Approximately One Hour

  7. How is Micro-surfacing used? • On asphalt and concrete pavements it can • fill ruts • restore skid resistance • address oxidized, raveled, and flushed surfaces • reprofile (leveling) • provides wear course • be used as an interlayer

  8. Performance varies with... • Climate • Traffic • Existing pavement • Materials / mixture design • Construction quality

  9. Condition of existing pavement • Structurally sound • Moderate- and high-volume roads

  10. Weather conditions • Air temperature at least 50°F • Pavement temperature at least 50°F • No rain • No freezing within 24 hours

  11. Construction considerations • Repair / seal joints and cracks; cure • Clean the surface of the road • Tack coat • dry or raveled surface • concrete

  12. Micro-surfacing performance • Wheel rut resistance - Excellent • Skid resistance - Excellent • Raveling resistance - Good • Treatment for flushing - Good • Interlayer - Good • Resistance to reflection cracks - Low

  13. Rut Box

More Related