Performance of Ultra-Thin Whitetopping District 58. Neal West, P.E.

Transcription

1 Performance of Ultra-Thin Whitetopping District 58 Neal West, P.E.

2 District 58

3 State Project FERRIDAY - RED GUM ROUTE US 65 CONCORDIA PARISH

4 Contractors Prime Contractor: D&J Construction Co., Inc. Ultra-thin Whitetopping Contractor: James Construction, Inc.

5 State Project

6 State Project

7 Typical Existing Section

8 Roadway section just north of completed project Existing Section Example Pavement Distress

9 Roadway section just north of completed project Existing Section Example Pavement Distress

10 Existing Section Example Surrounding Terrain

11 Typical Finished Section

12 Typical Finished Section Ultra-Thin Section

13 Contract Unit Price S-002 Ultra-thin Whitetopping Placement UTW (4 thick): $ /sq. yd. S-003 Ultra-thin Whitetopping Concrete (4 thick): $ /cu. yd.

14 Contract Materials Material LaDOTD 2000 Specs Portland Cement: Type I or II Fly Ash: Class C or F Ground Iron Blast Furnace Slag Aggregates & ( 1/3 pvmt. thickness) Admixtures Water Synthetic Fibers - ASTM C1116 (Type III)

15 Design Requirements Synthetic Fibers added at rate of 3 lbs./cu. yd. Slump 4 w/o water reducers (+/- 1 ) 8 with super-plasticizer 2 if slip formed Air Content 3% to 5%

16 Design Requirements Minimum Flexural Design Strength of 700 psi in 28 days testing by ASTM C 78 Open to traffic 500 psi For accelerated early strength projects, 500 psi in 24 hours. Pay adjustments apply if 24 hr. strength not met.

17 Contractor Mix Designs Portland Cement Siam Cement, Thailand (6.0, 6.5, & 7.0 bags/cu. yd.) Fine Aggregate (42%) Concrete Sand, Settoon Construction, Natchez, MS Coarse Aggregate (58%) Grade P, Martin Marietta Smithland, KY

18 Contractor Mix Designs Admixtures (within Mfg. s recommended rate) WRNS Master Builders 220N AE Master Builders MBAE 90 Fibers - SI Concrete Systems Inforce Fiber Mesh e3 (3 lb./cu. yd.)

19 Inspection Team Ferriday & Jena P.E. Offices

20 Concrete Production

21 Concrete Plant MMC Vidalia, LA

22 Addition of Fibers

23 Night work Considerations

24 Concrete Delivery

25 Ultra-thin Whitetopping Placement

26 Concrete Paver

27 Concrete Paver

28 Straightedging

29 Straightedging

30 Tine Finish

31 Curing Compound Application Subsection x the recommended rate (1.5 gals/100 sq. ft.)

32 Joint Spacing Table UTW Pavement Thickness, inches (mm) Notes: Maximum Spacing of Joints, feet (m) 2 (50) 2 (0.6) 2 1/2 (65) 2 1/2 (0.75) 3 (75) 3 (0.9) 4 (100) 4 (1.2) 1. Largest Dimension of panel less than 125% of the smallest dimension (150% with the Engineer s approval). 2. Minimum angle between any two intersection joints 80 o. 3. Joints intersect pavement edges at 90 o and extend a minimum of 1.5 feet from pavement edge.

33 Joint Sawing

34 1/3 depth of the pavement thickness Sawed Joint

35 Construction Inspection

36 Construction Inspection

37 Construction Inspection

38 Construction Inspection

39 Construction Inspection

40 Completed Lane

41 Completed Roadway

42 Quality Control & Acceptance - Flexural Strength -

43 Construction Inspection Making Beams Lot size is 100 cu. yds. 4 beams per lot

44 Flexural Beams Weight Comparison Flexural Beams = 60 lbs. vs. Compression Cylinders = 30 lbs.

45 Lime Curing Vats

46 Cleaning specimen prior to testing Flexural Specimens

47

48 Flexural concrete beam placed into breaking device Flexural Specimens

49 Flexural Beam Breaking Device

50 Flexural Test Video

51 Testing Results -photo Early Break 481 psi

52 Flexural Beam - Tested

53 Flexural Beam Failure Plane

54 Flexural Beams Fiber Additive Close-up

55 Flexural Beams Fiber Additive Close-up

56 Flexural 28 days (psi) QC Flexural Testing Results SP Flexure Beam 28 days Specification remove and replace < 700 psi Lot 9 - Change order to 80% pay Low High Avg. Spec Lot No.

57 Quality Control & Acceptance - Ride Quality -

58 Lot Layout For QC/QA Surface Tolerance Total Length of Ultra-thin Whitetopping - 8,722 ft., 23,259 sq. yds. Station Lot # Location From To sq. yds. 1 Rt. Rdwy./Lt. Lane " " " " * Rt. Rdwy./Rt. Lane " " " " * *End of Whitetopping

59 Profilograph Results Specification (subsection ), Category I, < 6 in./mi., Bumps < 0.3 in. per 25 ft. Profile Index (in./mi.) Lot Location Accept. Current 1 Left Lane Right Lane Average:

60 Construction Problems

61 Pavement Cracking Delayed Sawing

62 Pavement Cracking Delayed Sawing

63 Very Early Traffic

64 Patching Traffic Damage

65 Patching Traffic Damage

66

67 Questions?