Compacted Concrete Pavement
The main objective of this project was to evaluate construction issues and characterize the long-term performance of compacted concrete pavement (CCP). Three CCP test cells were designed and constructed in Scott County, Missouri, as part of a larger construction project. The total pavement length was 42 ft for the three cells. Cell 1 and Cell 2 were prepared without fibers and had a length of 15 and 12 ft, respectively. Cell 3 was prepared with 5 lb/yd³ (pcy) of synthetic fibers and had a length of 15 ft. The moisture content of the concrete was kept between 5% and 6%, and the water-to-cementitious material ratio was maintained between 0.31 and 0.38. Test results showed that the incorporation of fibers enhanced the mechanical properties (compressive and flexural strengths) of CCP mixtures when proper compaction was provided, as in the case of cast-in field samples. Also, fibers changed the flexural failure mode of saw-cut and cast-in-field CCP samples from brittle to ductile failure. The incorporation of fibers had a restraining effect on the drying shrinkage of CCP mixtures. The use of fibers did not have a significant effect on the performance of CCP mixtures, as shown from the falling weight deflectometer (FWD), truck loading tests and curling and warping. This can be mainly related to the extremely dry consistency of the CCP mixtures (Vebe consistency > 60) that can hinder bond strength in the interfacial transition zone with the matrix. This was more accentuated in the saw-cut samples from the paved CCP as the paving process in the field did not provide enough compaction. As for the size of slabs, results showed that the size of CCP slabs was more effective in the curling and warping measurements. The slab with longer length (15 ft) showed higher variations in curing and warping along the diagonal, transverse and longitudinal lengths over time. Therefore, the use of fibers in CCP can be recommended provided that the CCP mixture has adequate workability and sufficient compaction energy applied during construction.
- Record URL:
- Record URL:
-
Corporate Authors:
Missouri University of Science and Technology, Rolla
Center for Infrastructure Engineering Studies
Rolla, MO United States 65409Missouri Department of Transportation
Construction and Materials Division
Jefferson City, MO United States 65102Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC United States 20590 -
Authors:
- Khayat, Kamal H
- 0000-0003-1431-0715
- Farzadnia, Nima
- 0000-0002-9396-4102
- Abdelrazik, Ahmed
- 0000-0002-3075-5725
- Publication Date: 2022-1
Language
- English
Media Info
- Media Type: Digital/other
- Edition: Final Report
- Features: Figures; Photos; References; Tables;
- Pagination: 82p
Subject/Index Terms
- TRT Terms: Durability; Fiber reinforced concrete; Field tests; Mechanical properties; Roller compacted concrete pavements; Shrinkage
- Geographic Terms: Scott County (Missouri)
- Subject Areas: Highways; Materials; Pavements;
Filing Info
- Accession Number: 01837779
- Record Type: Publication
- Report/Paper Numbers: cmr 22-001
- Contract Numbers: MoDOT project # 201904
- Files: NTL, TRIS, ATRI, USDOT, STATEDOT
- Created Date: Feb 28 2022 9:42AM