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Concrete Mix Designs PPT
Post: #1

Concrete Mix Designs




Problems of SRA in Pavements

Technical
Early age strength loss
Delay in set time
Interaction with air entrainment admixture
Potentially washout with water
Economic
Cost

Benefits of FRC Pavements

Increased flexural capacity and toughness
Thinner slabs
Increased slab sizes
Limited impact on construction productivity
Limits crack width
Promotes load transfer across cracks (?)

Joint Design

Promote high shear stiffness at joint
High LTE
Larger and stronger aggregates
Increase cyclic loading performance
Predict crack or joint width accurately

Concrete Mix Design

Minimum strength criteria (MORmin)
Minimum fracture energy (GF)
Max. concrete shrinkage criteria (sh)
Aggregate top size (Dmax)
Strong coarse aggregate (LA Abrasionmax)
Saw-cut timing table
Slow down hydration rates and temperature
 

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