【作者】 闫铭； 王学文； 张虎元；

【Author】 YAN Ming;WANG Xuewen;ZHANG Huyuan;Key Lab of Mechanics on Western Disaster & Environment,MOE,Lanzhou University;

【机构】 兰州大学,西部灾害与环境力学教育部重点实验室；

【摘要】 我国高放废物地质处置即将进入地下试验室研究阶段,急需开展工业化放大试验,攻克缓冲回填砌块材料制备技术难题。在缓冲回填砌块材料制备方面的研究,国外已有了一定的进展。国外研究表明,压实块砌筑法适用于处置罐体所在的污染缓冲区,主流砌块形式为扇形。压制好的砌块应储藏在能够控制温度和湿度的仓库内养护,防止干裂及表面粉化。采用冻结冰末与低温膨润土拌和技术,与克服传统的水与膨润土直接混合相比,搅拌更容易,物料水化也更均匀。总结和消化国外的新技术,有助于制定我国工业化放大试验技术方案。更多还原

【Abstract】 There is an urgent need for China to commence the full-scale compaction test,resolving the preparation problem for buffer/backfill blocks when underground research laboratory project is planned for High Level Radioactive Waste(HLW) disposal.The foreign countries have some research about the preparation of buffer/backfill blocks in enginnered barrier systems.The foreign research shows that installation of clay blocks with sector shape at waste pollution area is a feasible engineering method.Compacted clay blocks need to be cured in a cabinet with controlled temperature and humidity to avoid desiccation and surface powdering.A freeze mixing method,mixing powdered-ice and cooled bentonite,can be operated more easily and obtain more uniform hydration than the traditional mixing of water and bentonite.It is helpful to review and adsorb the foreign research results for the design of full-scale test of bentonite compaction.更多还原