Internally cured concrete for pavement and bridge deck applications.

Details

• Creators:
  Tia, Mang ; Subgranon, Thanachart ; Kim, Kukjoo ; Rodriguez, Andrea Medina ; Algazlan, Abdullah
• Corporate Creators:
  University of Florida. Dept. of Civil and Coastal Engineering
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Bridge decks
  • Concrete curing
  • Concrete pavements
  • Cracking
  • Field tests
  • Laboratory tests
  • Lightweight aggregates
  • Mix design
  • Slabs
  • Mechanical properties
• Publication/ Report Number:
  BDV31-977-11 ; U.F. Project No: 00110686
• Resource Type:
  Tech Report
• Geographical Coverage:
  Florida
• Corporate Publisher:
  Florida. Dept. of Transportation
• Abstract:
  A laboratory and field testing program was conducted to evaluate the performance and usability of internally ; cured concrete (ICC) using lightweight aggregates for bridge decks and concrete pavement slabs under Florida ; conditions. The laboratory testing program evaluated three standard mixes (SM) and three corresponding ICC mixes ; with the same water-cementitious (w/c) ratios and cementitious materials contents. The ICC mixes were produced ; by replacing a part of the fine aggregate with a pre-wetted lightweight aggregate (LWA). The quantity of LWA used ; was an amount that would supply 7 lb of absorbed water per 100 lb of cementitious materials used. The amounts of ; water-reducing admixtures needed for the ICC mixes to achieve the same workability of the fresh concrete were less ; than those for the standard mixes with the same w/c ratios. The compressive strength, flexural strength, elastic ; modulus, splitting tensile strength, and coefficient of thermal expansion of the ICC mixes were lower than those of ; the standard mixes with the same w/c ratio. The ICC mixes showed substantially greater resistance to shrinkage ; cracking than the standard mixes as observed from the results of the restrained shrinkage ring test. ; Two ICC test slabs and one SM test slab were constructed to evaluate the performance of ICC in pavement ; slabs. The results of the critical stress analysis showed that at a critical loading condition, the computed stress-to- ; strength ratios for the ICC slabs were lower than that for the SM slab. Visual inspection of the SM slab after heavy ; vehicle simulator (HVS) loading showed that some hairline cracks could be seen next to the wheel path. These ; hairline cracks could be caused when micro shrinkage cracks developed into hairline cracks after the slab was loaded ; repetitively by the HVS wheel load. No visible cracks were observed from the two ICC test slabs. ; Based on the results of the critical stress analysis and the visual inspection of the three test slabs, the ICC test ; slabs appeared to have better performance than the standard-mix slab. A field testing program to further assess the ; performance and benefits of ICC mixes in bridge deck and pavement applications is recommended
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• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/29155/dot_29155_DS1.pdf
• File Type:
  [PDF - 9.33 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:b9af99d87549773b82587627185e54a59db5aa7d36396f0b35da7a47b20b6f45