Several types of industrial wastes can be used as raw materials to obtain calcium sulfoaluminate (CSA) cement clinker. The first aim of this work was to define the maximum content of zinc that could be incorporated in CSA clinker in order to obtain the threshold limit. The second aim was to study the effect of CSA clinker composition on the threshold limits for zinc. Threshold limits for three CSA clinkers containing 25–75 wt% of ye'elimite were investigated. It was found that, beyond the defined threshold limits, the stability of ye'elimite and belite was not affected and the formation of a zinc oxide phase was detected. The threshold limit for zinc was identified to be 0.3 wt% for all the tested clinkers. Assessment of the reactivity of cements at the threshold limits was followed by calorimetric and compressive strength measurements. The results showed that the doped cements were at least as reactive as the reference cement.

中文翻译：

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硫铝酸钙水泥熟料中锌的掺入

几种类型的工业废物可用作原料来获得硫铝酸钙 (CSA) 水泥熟料。这项工作的第一个目的是确定可掺入 CSA 熟料中的最大锌含量，以获得阈值限制。第二个目的是研究 CSA 熟料成分对锌阈值的影响。研究了含有 25–75 wt% ye'elimite 的三种 CSA 熟料的阈值限制。发现，超出定义的阈值限制，ye'elimite 和 belite 的稳定性不受影响，并且检测到氧化锌相的形成。对于所有测试的熟料，锌的阈值限制为 0.3 wt%。水泥在阈值限制下的反应性评估之后是量热和抗压强度测量。