The leaching performance of the mixes evaluated in this study was not particularly sensitive to the factors used in the experimental design. Leach indices were determined for the test mixes for contaminants of interest. All of the test mixes exhibited higher mean compressive strengths after 90 days of curing, with only one composition having a mean compressive strength of less than 500 psi. This may be explained in that the cementitious phases matured more quickly in the mixes with higher concentrations of slag, as evidenced by the data for the time to peak heat generation. Higher fly ash concentrations decreased the compressive strength after 28 days of curing. Higher sodium concentrations and higher water to premix ratios led to reduced compressive strength. After 28 days of curing, several of the test mixes had mean compressive strengths that were below the 500 psi requirement. The low activity waste form for disposal at the Hanford Site is required to have a compressive strength of at least 500 psi. Samples were cured for at least 28 days at ambient temperature in the laboratory prior to cured properties analyses. These observations may help to describe some of the cured properties of the samples, in particular the differences in compressive strength observed after 28 and 90 days of curing. ![]() B.Ĭoncentration in the salt solution reduced the time to peak heat flow, and reducing the amount of slag in the premix increased the time to peak heat flow. International Nuclear Information System (INIS)įox, K. ![]() Institute of Scientific and Technical Information of China (English)Ĭauses of higher alkyne pipe blocking of acetylene concentration system in the natural gas-based acetylene production plant were found out by analyzing higher alkyne gas component concentration variation.
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