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    ​​​​​​​​​​​​​​Concrete Durability​

    Concrete durability issues can be costly to repair and are caused by many different factors that occur during the life of the concrete, starting as early as the curing stage. Freezing and thawing cycles, drying shrinkage or restrained sh​rinkage, as well as concrete permeability, sorptivity and alkali silica reactivity are just a few of the issues that can cause costly concrete durability issues. Master Builders Solutions provides testing to help concrete producer partners identify the durability issues they face with concrete mixtures to help solve those challenges.​

    ASTM C666 (Freeze-Thaw Testing)

    ​The durability of concrete subjected to repeated cycles of freezing and thawing can be compromised under certain conditions, particularly, if the concrete is not properly air entrained and approximately 91 percent or more of the pores in the concrete are filled with water during the freeze cycles.  Deterioration is usually manifested in the form of scaling and cracking through the concrete.

    ​ASTM C157 (Drying-Shrinkage Testing)

    ​When concrete dries, the loss of moisture from the capillary pores results in a change in volume.  Restraint of the volume change leads to the development of tensile stresses within the concrete matrix, in​evitably causing cracking and leading to serviceability and durability problems.​

    ​​ASTM C1581 (Restrained-Shrinkage Testing)

    ​When concrete dries, the loss of moisture from the capillary pores results in a change in volume.  Restraint of the volume change leads to the development of tensile stresses within the concrete ​​matrix, inevitably causing cracking and leading to serviceability and durability problems.

    ​ASTM C1202 (Rapid Chloride Penetration Testing)

    ​Corrosion of steel reinforcement is one of the major causes of deterioration of reinforced concrete structures.  The primary reason is the ingress of chlorides from deicing salts or exposure to the marine environment or brackish water.  The rate of ingress of chlorides into concrete depends on the permeability of the concrete, which is affected by factors including materials, mixture proportions, construction practices, and age.​

    ​​ASTM C1585 (Concrete Sorptivity Testing)

    ​Fluid transport in concrete is influenced by the pore structure and size of interconnected capillary pores. The passage of fluids through capillary suction can impact the rate of chemical ingress leading to premature deterioration of concrete.

    ​ASTM C1260 (Alkali-Silica Reactivity Testing)​

    ​ASR is a dele​terious chemical reaction between reactive forms of silica in some aggregates (eg: chert, quartzite, opal, strained quartz crystals) and the highly alkaline cement pore solution in concrete.  This reaction produces an expansive gel in hardened concrete and, when exposed to continuous moisture, swells and causes cracking of the concrete leading to structural problems and/or high maintenance costs.  ASTM C1260 provides a way to assess the potential reactivity of an aggregate intended for use in concrete, whereas ASTM C1567, a slightly modified version, helps to evaluate the ability of a supplementary cementitious material (SCM) to mitigate deleterious internal expansion due to ASR.​​

    Contact the Master Builders Solutions Technical Center

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    Concrete Durability Testing