6503 Bridges 95% in excellent to good condition. FDOT: 12,088 centerline miles, 42,633 lane miles. Statewide: 121,446 centerline miles, 267,793 lane miles. FDOT: 10% centerline miles, 16% lane miles. FDOT carries 54% of all traffic in state. 1 Deficient Pavements (%) Criteria 2005 2006 2007 2008 2009 2010 2011 Ride 5.6 3.8 3.5 3.2 2.6 2.6 2.6 Crack 17.0 15.8 14.6 14.9 13.0 10.9 9.7 Rut 1.2 0.9 0.9 1.0 0.6 0.6 0.6 Section 334.046 of Florida Statutes: “Ensuring that 80% of the pavement on the SHS meets Department Standards” 24% 22% 20% Crack Ride Rut % of SHS Deficient 18% 16% 14% 12% 10% 8% 6% 4% 2% 0% 4 5 334 Superpave Asphalt Concrete Variable Thickness Overbuild SP 9.5 minimum thickness = 3/8 inch SP 12.5 minimum thickness = 3/4 inch Roadway Sampling and Testing Allows engineer to move core location for safety reasons Individual Test Tolerance for QC Testing ONE average sublot density MPR failure terminates the LOT – course or fine. Defective Material Removal of mandatory requirement to remove material if delineation occurs. 6 300 Prime and Tack Coats Minimum tack rate for newly constructed asphalt layers = 0.03 gal/sy 330 Construction Requirements Straightedge Exceptions – clarification of intersection Friction Course - Address all deficiencies in either wheel path that exceed 3/16 inch. 338 Value Added pavements Bleeding area description clarified to an “area 10 sf.” 7 Replacement of RA binders with PG binders. 300 Prime and Tack Coats NTSS-1hm now allowed for use as prime coat. Tack all asphalt layers prior to constructing next course. 330 General Construction Clarification to Table 330-1 – Ambient Air Temperature Requirements Deleted requirement for RSE QC testing on friction course on jobs w/ laser acceptance Clarified straightedge deficiency corrections 8 Changed minimum overbuild thickness for SP-12.5 to ½” Deleted RA Grades and references to viscosity Replaced Pavement Composition Reports with Pavement Coring Reports No more gradation and binder content Do not perform density testing in areas less than 50 tons within a sublot 9 Change in density tonnage for pay factor calculation Deleted Ninitial mix design requirement New RAP Binder Table Percent RAP Binder Grade 0 - 15 PG 67-22 16 - 30 PG 58-22 > 30 PG 52-28 10 Concept: Focus on performance rather than prescriptive construction requirements Eliminate all specification requirements for tacking (materials, application rates, methods of control, etc.) for all dense graded mixtures Eliminate all FDOT pre-testing of tack coat materials Require Contractor to identify in QC Plan the methods to be used for bonding pavements Provision for bond strength testing if determined necessary by the Engineer Based on visual inspection Informational bond strength testing available upon request Contact Sungho Kim 352-955-6314 / Sungho.Kim@dot.myflorida.com Will be used on trial project: SR-26 Alachua County Multiple test sections: SR-2 Baker County US-90 Gadsden County HVS ARMI = Poorest performance for rutting and cracking on test sections UF Study = Bad Will be removed as a standard design alternative Current research being done to find appropriate replacement for ARMI Maintain use of current quantity of GTR. Minimum of 7% GTR Optional addition of SBS polymer. Replace ARB-5 and ARB-12 with PG 76-22R. Meet the criteria of a performance graded binder. Separation and Workability July 2013 Specification Changes 16 Planned test section on US-98 in Gulf County (2012) to evaluate: Micro-surfacing. 1/2” and 3/4” HMA overlays with FC-4.75 mix. 1” HMA overlay with FC-9.5 mm mix. Hot-in-place recycling. Bonded friction course. Mill and resurface 1” FC-9.5. Mill and resurface 1.5” FC-12.5. Control sections. 17 Located in Auburn, AL. FDOT’s sections (2 ea x 200’) Bonded Friction Course RAP versus RAS PG 76-22 (SBS) versus PG 76-22R 1.7 mile total length of track 18 Thick polymer modified tack coats. Two types (emulsified - spray paver) or non-emulsified. Asphalt Mix Emulsified Polymer Membrane Surface of Mix Direction of Paving 1/2 1/3 Existing Pavement 19 Loads at 8 mph. Temperature controlled. Can change wheel type (single or dual). Purchased in S. Africa. Current Round of Testing PG 76-22R Sections 4.75 mm mix Prime vs. no prime vs. tack 20 Effects of increased RAP in dense graded friction courses (UF) FC-5 durability study (Rutgers) Sampling at the Paver (NCAT) Data Analysis (NCAT) CPF Analysis (FDOT) End of Project CPF QC Adjusted Lot CPF F & t Statistical New LIMS system (FDOT) 284,996 300,000 250,000 223,093 191,030 Tonnage 200,000 150,000 100,000 50,000 39,869 7,856 730 15,165 0 2006 2007 2008 2009 Year 2010 2011 2012 Questions/ Comments? 23