LABORATORY EVALUATION OF AN INNOVATIVE AND COST EFFECTIVE HIGH-FRICTION SURFACE TREATMENT

Event Date/Time: 
December 14, 2018 - 10:00am
Event Location: 
Room 3546D Engineering Building
Speaker: 
Xiaoyu Wendi Chen
Master’s Thesis Defense

Master’s Thesis Defense

 

LABORATORY EVALUATION OF AN INNOVATIVE AND COST EFFECTIVE HIGH-FRICTION SURFACE TREATMENT

 

By

Xiaoyu Wendi Chen

 

Advisor: Prof. M. Emin Kutay

 

Friday, December 14, 2018 at 10:00 am - 12:00 pm

 

Room 3546D Engineering Building

 

Abstract:

            High Friction Surface Treatment (HFST) is a surface treatment that can effectively improve the frictional characteristics of pavements and enhance the user’s safety on the road. Among all existing application of HFSTs, bauxite and oil-based epoxy resin are the most commonly used materials in the United States. However, bauxite and conventional epoxy resin are not cost-effective and provide limited preservation benefits to the pavement structure with existing distresses (i.e., top-down fatigue). In this study, the performance of a new and cost-effective HFST technique that uses waterborne epoxy, emulsified asphalt and corundum sand has been investigated through a battery of laboratory tests. The performance of the innovative HFST was evaluated and compared with common HFSTs (copper slags and bauxites) used in USA with respect to three aspects: (i) skid resistance improvement measured by British Pendulum Tester before and after the treatment, (ii) durability to environmental effects (moisture induced damage and freeze-thaw cycles), and (iii) the effect of application on surfaces with existing top-down cracking through Semi-Circular Bending tests. The results showed that the new HFST with waterborne epoxy and corundum was able to improve the skid resistance as well as (bauxites) or better than (copper slags) the conventional HFSTs. The deterioration rate on skid resistance of new HFST after freeze-thaw cycles and damage were found to be faster than bauxites but slower than copper slag. In addition, since corundum sand used in the low-cost HFST is much finer than either copper slags or bauxites and viscosity of waterborne epoxy is less than oil-based epoxy resin, the new HFST’s material has the potential to fill the existing cracks with a width of 1.5±0.1 mm and relief the further propagation of the existing top-down cracks. Laboratory testing results revealed that the innovative HFSF technique developed by a Chinese manufacturer has the potential to lower the material cost and perform as well as the materials regularly used in the United States.