【摘要】 本文对湖南浏阳、北京延庆地区热液型海泡石的物化性能、活化处理工艺条件及其对Na+、K+、Ca2 +离子的吸附作用进行了研究。实验表明 ,酸处理的方法可以有效地提高海泡石对Na+、K+、Ca2 +离子的吸附能力 ,并且通过正交实验得到最佳酸化工艺条件为 :酸化时间为 2h ,酸的浓度为 5 % ,液固比为 3 5∶1。经酸处理的海泡石可以有效地降低饱和Ca(OH) 2 溶液中Na+含量 ,这为海泡石作为掺和料吸附混凝土细孔中游离的碱性阳离子 ,抑制混凝土的碱 骨料不良反应的发生提供了实验依据。更多还原

【Abstract】 The physical and chemical properties, technological parameters of activation and absorption ability to Na +, K + and Ca 2+ , taking hydrothermal metasomatic sepiolite from the regions of Liuyang, Hunan and Yanqing, Beijing for experimental example, were studied in this paper. The results show that acidification can effectively improve the ability of sepiolite to absorb Na +, K + and Ca 2+ . The optimal technological parameters of acidification are determined through orthogonal design: the duration of acidification is 2 hours, the concentration of the hydrochloric acid is 3% and the ratio of liquid to solid is 35∶1. The acidified sepiolite can effectively reduce the concentration of Na + in the saturated Ca(OH) 2 solution, which provides the experimental foundation for sepiolite used as admixture to absorb dissociated alkaline cations in the concrete and restrain ill concrete alkali-aggregation reaction.更多还原