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Additional info for Control of Cracking in Concrete State of the Art
Stability of Structures: Elastic, Inelastic, Fracture, and Damage. Oxford University Press, New York, 1991. Bazant, Z. , and J. Planas. , 1998. , S. Diamond, and N. Berke. Steel Corrosion in Concrete. Chapman & Hall, London, 1997. Berke, N. , and M. P. Dalliare. The Effect of Low Addition Rate of Polypropylene Fibers on Plastic Shrinkage Cracking and Mechanical Properties of Concrete, Fiber-Reinforced Concrete: Development and Innovations, ACI SP-142-2, 1994, pp. 19–41. , P. Acker, S. Rigaud, and B.
Construction Practices Construction issues can be classified into two types: physical construction issues that are within the control of contractor, and environmental issues that are not. Both categories can be addressed through a combination of specifications, good concrete placement practices, project partnering, inspection, proper planning, and contractor awareness. The following section primarily describes construction issues related to cracking and how they can be dealt with at the project level.
This has led many to use mixtures with low w/c. Recent work however has illustrated that the propensity for cracking can increase as the strength of concrete increases and especially if insufficiently cured. This is due to the following five factors 1. 2. 3. 4. 5. Early-age autogenous shrinkage, Higher material stiffness, Increased brittleness, Reduced creep, and Increased shrinkage rate (Weiss et al. 1999). Low w/c concrete also bleeds less and is therefore more susceptible to plastic shrinkage cracking.