The Wonderful World of Epoxy. Presented By: Justin Morris, P.E. Khalil Hanifa, P.E.

Transcription

1 The Wonderful World of Epoxy Presented By: Justin Morris, P.E. Khalil Hanifa, P.E.

2 Outline Recent History of Epoxy Use in Louisiana Louisiana DOTD s Current State of Practice NTPEP ASTM C881 High Friction Surface Treatment (HSFT) AASHTO PP 79 Bridge Overlays

3 The Recent History of Epoxy Use in Louisiana April 2014 LA DOTD Notifies all Epoxy Resin System Manufacturers of Revised Specification to Section 1017 (Requires ASTM C881 Testing) February 2015 LA DOTD Updates its AML Procedure for Epoxy Resin Systems to Reflect Specification Change and to Include NTPEP Testing

4 The Recent History of Epoxy Use in Louisiana July 2015/May 2016 Reminders to Submit Products to NTPEP for Testing Sent to Manufacturers February 2017 LA DOTD Moves All Epoxy Resign Systems (Who Have Not Complied) to Inactive Status on the AML

5 Louisiana DOTD s Current State of Practice For Evaluating Epoxy Manufacturer Submits Product to NTPEP for Testing Under Epoxy and Resin Based Adhesive Bonding Systems Laboratory Results Obtained from NTPEP Used to Determine Conformance to LA DOTD s Standard Specification (Section 1017) Verification Laboratory Testing Conducted by LA DOTD Field Evaluation May Be Required Submitter Notified Whether System Will or Will Not Be Added to the AML based Upon Complete Evaluation

6 NTPEP What Is It? National Transportation Product Evaluation Program Who Do They Serve? The Member Departments of the American Association of State Highway and Transportation Officials (AASHTO) What Do They Do? Establish Work Plans (Requirements/Testing Criteria) for the Testing of Transportation Materials What is the Process? Manufacturers/Suppliers Submit Products to NTPEP for Laboratory/Field Testing and Results are Shared with Member Departments

7 ASTM C881 Epoxy-Resin-Base Bonding Systems for Concrete Types (Applications) Types I II III IV V VI VII Bonding Application Non-Load Bearing (Hardened Concrete to Hardened Concrete) Non-Load Bearing (Freshly Mixed Concrete to Hardened Concrete) Skid-Resistant Materials to Hardened Concrete Load Bearing (Hardened Concrete to Hardened Concrete) Load Bearing (Freshly Mixed Concrete to Hardened Concrete) Bonding/Sealing Segmental Precast Elements Non-stress Carrying Sealer (Segmental Precast Elements)

8 ASTM C881 Epoxy-Resin-Base Bonding Systems for Concrete Grades (Viscosity/Flow) Grades Flow 1 Low Viscosity 2 Medium Viscosity 3 Non-Sagging Consistency

9 ASTM C881 Epoxy-Resin-Base Bonding Systems for Concrete Classes (Temperature Ranges) Classes Temperature Ranges A For Use below 40 F B For Use Between 40 and 60 F C For Use Above 60 F D E F For Use Between 40 and 60 F (Type VI and VII Applications) For Use Between 60 and 80 F (Type VI and VII Applications) For Use Above 75 F (Type VI and VII Applications)

10 High Friction Surface Treatment (HFST) What Is It? A Binder Resin System That Holds a Surface Applied Aggregate Firmly In Place What Is Its Primary Use? Restoring/Enhancing the Friction Properties of a Pavement Surface Where High-Friction or Anti- Skidding Properties are Desired Where Are HFST s Typically Applied? Horizontal Curves, Intersections, Exit-Entrance Ramps, Steep Grades, and Bridges

11 AASHTO PP 79 High Friction Surface Treatment for Asphalt & Concrete Pavements Binder Resin System (Physical Requirements) Viscosity Gel Time Ultimate Tensile Strength Point Durometer Hardness Compressive Strength Cure Rate Water Absorption Adhesive Strength

12 AASHTO PP 79 High Friction Surface Treatment for Asphalt & Concrete Pavements Aggregate (Physical & Chemical Requirements) Resistance to Degradation Aggregate Grading No. 4 Sieve (% Passing) No. 6 Sieve (% Passing) No. 16 Sieve (% Passing) Moisture Content Aluminum Oxide

13 Bridge Overlays Resin (Physical Properties) Property Bridge Overlay HFST Compressive Strength, min 5,000 psi (24 hr.) 5,000 psi (7 days) Shore D Hardness, min Tensile Elongation, min 20% 30% Water Absorption, max 0.5% 1%

14 Questions/Comments