Title:
Ultra High-Performance Concrete (UHPC) as a High Friction Surface Treatment (HFST) Binder
Author(s):
Maeger
Publication:
Web Session
Volume:
ws_F23_Maeger.pdf
Issue:
Appears on pages(s):
Keywords:
DOI:
Date:
10/29/2023
Abstract:
Roadway geometric issues greatly increase risk of vehicle crashes. High friction surface treatments (HFSTs) can compensate for this by increasing the available friction, reducing wet weather curve crashes by 83 percent, but at a high relative cost. Ultra high-performance concrete (UHPC) has potential as a cost-efficient alternative. UHPC has exceptional bond strength making it an ideal substitute for polymer resin binders used in HFSTs. This research is developing mix design and application procedures for UHPC based HFSTs including a comparative study of surface retarders. The microtexture, abrasion and friction of various local aggregates have been evaluated against calcined bauxite aggregate. Evaluation of rheology, durability, and bond strength of UHPC mixes is ongoing. The friction, macrotexture and microtexture of UHPC based surfaces are being assessed with Dynamic Friction Tester, British Pendulum Tester, and laser texture scanning. This innovative UHPC application can potentially improve safety at significantly lower cost to transportation agencies.