| dc.description.abstract | In this study, artificial aggregates used as foundation materials, and as aggregates in CLSM, cause corrosion of metal materials and reinforced concrete. The study includes the EU column leaching test, ponding test, calculating the diffusion coefficient of concrete with the NIST program, simulation practice in situ.
The results: (1) Artificial aggregates for column leaching test, analysis of six leaching of heavy metals, are lower than the Dutch standard and heavy metal pollution of EPA standards. (2) The results of concrete design mixture 210 and 280 kgf/cm2 with NIST program and 90 days of ponding test, NIST program shows the prediction for the diffusion coefficient of 210 kgf/cm2 design mixture is close, but for the 280 kgf/cm2 design mixture is underestimated. (3) A variety of corrosion prevention of carbon steel in artificial aggregate gradation, after five months the weight loss of the hot-dip galvanized and epoxy zinc painted carbon steels, less than the same treatment in the natural gradation, because the weight difference dealing with corrosion, resulting in weight loss for the experimental error. (4) RC components in the different foundation materials and CLSM after five months, no chloride ions penetrate the internal and not lose the basic protection of the environment, the reinforced after cutting and before making RC components, their yield strength, tensile strength and elongation were similar, and they all consistent with CNS 560.
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