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首页> 外文期刊>Polymer Composites >Immobilization of sulfate waste simulate in polymer-cement composite based on recycled expanded polystyrene foam waste: Evaluation of the final waste form under freeze-thaw treatment
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Immobilization of sulfate waste simulate in polymer-cement composite based on recycled expanded polystyrene foam waste: Evaluation of the final waste form under freeze-thaw treatment

机译：基于再生的膨胀聚苯乙烯泡沫废料的聚合物 - 水泥复合材料中固定硫酸盐废物模拟：冻融治疗下最终废物形式的评价

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摘要

A new polymer-cement composite matrix for solidification and stabilizing of low- and intermediate level radioactive sulfate waste, containing high concentration of sulfate as sodium salt (113.16 g/L), had been developed at the inorganic applied chemistry unit, radioisotope department, Egyptian atomic energy authority. The proposed composite is based on ordinary Portland cement and expanded polystyrene recycled from foam wastes. The integrity of the reached final waste forms (polymer-cement composite immobilizing sulfate wastes simulate) was evaluated after subjecting to freeze-thaw (FT) treatment. The cycling was performed for the final waste form at the end of 28 days curing period between (-20 degrees C +/- 1) and (60 degrees C +/- 1) for 180 days. Mass changes, compressive strength, porosity, and bulk density were determined for the solid blocks at the end of definite increasing FT cycles. To evaluate the changes in the internal structure accompanied the FT cycling, Fourier-transform infrared, X-ray diffraction, thermogravimetry, and scanning electron microscopy tools were used. Based on the data obtained, it could be stated that the proposed polymer-cement composite can withstand the aggressive conditions exist during the disposal process and candidate it can be used adequately for incorporating the sulfate waste concentrate originated from the boiling water reactors. POLYM. COMPOS., 38:637-645, 2017. (c) 2015 Society of Plastics Engineers
机译：埃及原子能管理局放射性同位素部门无机应用化学部门开发了一种新的聚合物水泥复合基质，用于固化和稳定中低放射性硫酸盐废物，其中含有高浓度的硫酸钠（113.16 g/L）。该复合材料基于普通波特兰水泥和从泡沫废物中回收的发泡聚苯乙烯。在进行冻融（FT）处理后，对最终废物体（固定硫酸盐废物的聚合物水泥复合材料）的完整性进行了评估。在（-20摄氏度+/-1）和（60摄氏度+/-1）之间的28天固化期结束时，对最终废物体进行180天的循环。在一定的增加FT循环结束时，测定了固体块的质量变化、抗压强度、孔隙率和体积密度。为了评估FT循环过程中内部结构的变化，使用了傅里叶变换红外、X射线衍射、热重分析和扫描电子显微镜工具。根据获得的数据，可以说，拟议的聚合物水泥复合材料能够承受处置过程中存在的侵蚀性条件，并且可以充分用于合并来自沸水反应堆的硫酸盐废水浓缩物。博莱姆。COMPOS。，38:637-645, 2017. （c） 2015年塑料工程师学会

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