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 Mechanical Properties Mix Design Slabs
• 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
  
  
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:b9af99d87549773b82587627185e54a59db5aa7d36396f0b35da7a47b20b6f45
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/29155/dot_29155_DS1.pdf
• File Type:
  [PDF - 9.33 MB ]