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首页> 外文会议>First International Conference on Computational Methods in Materials Characterisation; Santa Fe, New Mexico >Estimation of alkali diffusivity from dynamic leaching test
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Estimation of alkali diffusivity from dynamic leaching test

机译：从动态浸出试验估算碱扩散率

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The reuse of waste materials from manufacturing plants in order to decrease the material volume to be disposed to landfill is increasingly receiving public interest. This research is focused in the evaluation of alkali diffusivity using a short term dynamic leaching test. Such tests are necessary because of environmental regulations. In this study, several concrete mixes were used in order to test the applicability of the method. Concentration profiles of calcium, sodium, potassium and chloride are interpolated with a semi-empirical expression based on diffusion-like leaching behaviour. Although a simplification is introduced, preliminary results indicate that the calculated diffusion coefficient agree with those reported in several other findings. Moreover, the presence of recycled materials slightly increases the ion leachability (K, Na, Cl) and the substitution of fine fraction aggregate results in a lower net leaching suggesting an increase in pozzolanic activities.
机译：来自制造厂的废料的再利用，以减少将要填埋的材料量，越来越受到公众的关注。这项研究的重点是使用短期动态浸出试验评估碱扩散性。由于环境法规的原因，此类测试是必要的。在这项研究中，使用了几种混凝土混合物以测试该方法的适用性。钙，钠，钾和氯化物的浓度曲线通过基于扩散样浸出行为的半经验表达式进行内插。尽管进行了简化，但初步结果表明，计算出的扩散系数与其他一些发现中报道的相符。此外，回收材料的存在会略微增加离子的浸出能力（K，Na，Cl），细颗粒聚集体的替代会导致较低的净浸出，表明火山灰活性增加。

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