Standard Paragraphs for VDOT Technicians Field Rep Essays

Standard Paragraphs for VDOT Technicians Field Reports The GeoConcepts representative arrived on site, as requested, to observe and/or perform the followings:- Concrete: Self-Consolidated Concrete (SCC): Observe the placement of 24.0 cubic yards of 5000 psi Caisson Self- Consolidated Concrete (SCC) for drilled shaft #7. Concrete sample was taken from each truck and tested for temperature, slump and air content. All test results were informed to Dewberry representative. One set (Set #23) of nine cylinders (three for 28 day, four for early field breaks and two for permeability) was molded for compressive strength and permeability testing in our laboratory. Curb & Gutter Observed the placement of 90.0 cubic yards of 3000 psi A3 Extrusion Concrete supplied by Vulcan Materials. The concrete was poured for curb and gutter (CG-7) between structure 11-3 and structure 13-3 from station 158+30 to station 173+25 to the right side of west bound of route 50. The concrete observed on this date appeared to be placed in compliance with project specifications with regard to temperature, slump, air content, and batch to placement time. One set (Set #50) of 5 (3 for 28 days lab and 2 field) concrete cylinders (4"X8") for compressive strength of in our laboratory. Storm Water Structure Inverts: Observed the placement of 10.0 cubic yards of 4000 psi A4 Modified Concrete supplied by Titan Virginia Ready Mix LLC. The concrete was poured for the inverts of storm water structures #21-6 (sta.223+75), #22-1 (sta.226+00) on east bound of Rt.606. and structure #28-12 (sta.11+60) on Loudoun County Parkway. No sample was taken for this concrete. Box Culvert: Observed the placement of 80 cubic yards of 4000 psi A4 Modified Concrete (VDOT Design #9026-U-16) supplied by Titan Virginia Ready Mix LLC. The concrete was poured for box culvert (Structure #11-2) Wall and Slab (pour #11) on west bound of Route 659. Concrete observed on this day at this location appeared to be placed in compliance with project specifications with regard to temperature, slump, air content and batch to placement time. One set (Set #23) of seven cylinders (3 for 28 day lab, 2 for permeability and 2 for early field break) was molded for compressive strength and permeability testing in our laboratory. The rebar surface temperature was measured to be 40 F. Prior to concrete placement, the area was covered with plastic sheet, capped with plywood on top and heated with vacuum pump heater. The contractor continued to heat the area during and after concrete placement in order to keep the temperature within the limit of specifications. Bridge Deck: The GeoConcepts representative arrived on site as requested to observe the placement of 170 cubic yards of 4,000 psi A4 General Concrete for west bound Bridge Deck Span "G" on Gloucester Parkway. Concrete observed on that day appeared to be placed in accordance with project drawing and specifications with regard to temperature, slump and air content. Two sets (Set #23 day lab, three for early field break and two for permeability) were molded for compressive strength and permeability testing in our laboratory. Retaining Wall: Observed the placement of 17.0 cubic yards of 3000 psi A3 General Concrete for the 3rd footing section #10 of Retaining Wall #4 (RW-3) from station 229+45 to 230+05 on westbound of Route 659. Concrete observed for this date appeared to be placed in compliance with project specifications with regard to temperature, slump and air content. One set (Set #121) of five cylinders (three for 28 day lab and two for permeability) was molded for compressive strength and permeability testing in our laboratory. Soils & Aggregate: RCP Storm line: Observed the placement and compaction of VDOT #25 stones and soils for 40 linear feet of 15" diameter RCP stormwater line between storm structures #34-16 and #34-17 from approximate stations 199+50 to 200+25 at right side of westbound of Route 606. The contractor installed structure #28-11 on that day. Utilizing the Nuclear Method (ASTM D-6938-08a), checked the compactions of VDOT #25 stones and soils; test results indicated that the compacted material, at the areas and elevations tested, met or exceeded the project requirements of 95% of the maximum dry density of VDOT #25 stone (using suppliers laboratory proctor provided by the Dewberry Representative) and soils (using our laboratory proctor, Project source #S-2N). The soils observed on this date appeared to be placed in compliance with project specifications with regard to lift thickness and moisture content. Roadway Embankment: Observed the placement and compaction of soils for roadway embankment from station 13+50 and 16+50 on east bound of Fort Johnson Road. Utilizing