Guidelines for Early-Opening-to-Traffic Portland Cement Concrete for Pavement Rehabilitation (2005) / Chapter Skim
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Therefore, EOT concrete repair materials must meet or exceed criterion set for opening strength. Concrete strength is essentially a function of the constitutive materials used, their proportions, temperature, and time of hydration.
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3.3 DURABILITY The performance of EOT concrete repairs can be adversely affected by the concrete's lack of durability (i.e., ability to maintain its integrity in the environment in which it was placed)
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In EOT concrete repairs, deterioration due to external sulfate attack would likely first appear as cracking near joints and slab edges, generally within a few years of construction. Fine longitudinal cracking may also occur parallel to longitudinal joints.
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Shrinkage and/or thermal strain could produce such stress when restrained by the aggregates. Both autogenous shrinkage and rapid changes in temperature of EOT concrete mixtures could lead to excessive microcracking of the paste.
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From page 18... ...
A variety of techniques are used for determining the absorption rate of concrete. One common test is ASTM C 642, "Test Method for Specific Gravity, Absorption, and Voids in Hardened Concrete," which is commonly used as a quality control test for precast members (Neville 1996)
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