Pavement Preservation Journal - Spring 2012 - (Page 38)

ASSOCIATIONS Test Sections Constructed at Virginia Smart Road only represents 70 to 80 percent of the textured surface. The rest is still transverse tining. The existing CDG grinding of the plain jointed concrete section was performed with a 3-ft. grinding head and the match line between passes is only about 4 to 5 in. offset from the track line of where the VTTI profile testing studies are conducted. The match line (between adjacent passes) is almost 1/8 in. difference in elevation at some locations. The diamond grinding of both test areas was accomplished using two units, a surface planer/diamond grinder with a 4-ft. head, and a surface planer/diamond grinder with a 3-ft.head. The two machines were used to conduct the work to prevent any excessive overlap between passes which would occur as a result of the different lane widths that existed in the CRCP and JPCP sections. The longitudinal grooving was accomplished using a groover operating longitudinally. Only one unit was used and was set up with 0.125 blades with spacers to create either the ½ in. or ¾ in. groove spacing. The test section construction was donated by the IGGA and Safety Grooving and Grinding to take advantage of VTTI’s surface characteristics leadership in the United States. Their dedicated research staff conducts annual profiler and skid trailer comparisons. This will allow them to study the impact of grinding and grooving on profiler measurements and on friction test results. In addition, the sections allow the future evaluation of splash and spray as the VTTI facility has this capability as well. Groover was used in preparing concrete test sections on Virginia Smart Road in 2011 L ast year the International Grooving & Grinding Association (IGGA) announced construction of diamond grinding and grooving test sections at Virginia Tech Transportation Institute (VTTI) Smart Road research facility. These test sections were constructed to facilitate future road research by VTTI and others. In January 2011, Safety Grooving and Grinding constructed three test strips situated on two test areas. The three test strips included a conventionally diamond ground (CDG) section and an area that was both CDG followed by longitudinal grooving of each half of the lane using two different groove spacings; ½ and ¾ in.. Each of the two test areas were ground one lane wide and 528 feet long. SMART ROAD FACILITY The Virginia Smart Road is a 2.2mile long, two-lane closed roadway which is used for highway and bridge research as well as vehicle and Intelligent Transportation Systems (ITS) research. The facility, completed in 2002, is located near Blacksburg, Va., the home of Virginia Tech Transportation Institute (VTTI). CONCRETE TEST SECTION The Smart Road facility had only two concrete test sections; an approximately 3,000-ft.-long continuously reinforced concrete pavement (CRCP) section, and a 1,200-ft.-long plain jointed section. Both sections are located on a 6 percent grade and were textured with uniform transverse tining. The CRCP was constructed smooth while the plain jointed concrete section was constructed very rough (it was reported as having an IRI of 200 inches per mile when constructed) and subsequently had to be diamondground. The CDG texture probably 38 View past issues of the Pavement Preservation Journal online at www.naylornetwork.com/fpp-nxt http://www.naylornetwork.com/fpp-nxt

Table of Contents for the Digital Edition of Pavement Preservation Journal - Spring 2012

President’s Message
National Preservation Conference: Make Plans Now
Pavement Preservation is ‘Sustainable’ Choice
Deck Micro Surfacing Cuts Accidents, Wins Award
Enhanced Fog Seals Boost Chip Retention
Sophisticated ‘Seal Coats’ Enhance Texas DOT Pavement Preservation
Rejuvenating Treatment Preserves Runway, Grooving
Fine-Mill Pavements for Smooth Thin Overlays
Puerto Rico, Southeast States Focus on Preservation
Maryland Identifies Right Fix for Right Road, Right Time
‘Thin is In’ for New Texas Center Courses
Why to Cut Back on Cutback Asphalt
Test Sections Constructed at Virginia Smart Road
Ground Penetrating Radar Fills Gaps in PMS

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