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首页> 外文期刊>土木学会論文集 >DEVELOPMENT OF LOW-ALKALINE CEMENT USING POZZOLANS FOR GEOLOGICAL DISPOSAL OF LONG-LIVED RADIOACTIVE WASTE
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DEVELOPMENT OF LOW-ALKALINE CEMENT USING POZZOLANS FOR GEOLOGICAL DISPOSAL OF LONG-LIVED RADIOACTIVE WASTE

机译：利用Pozzolans的低碱性水泥的开发用于长寿放射性废物的地质处理

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摘要

To reduce uncertainties in the safety assessment of the disposal system for long-lived radioactive waste,cement was developed which generates leachates with a lower pH than that of ordinary cement paste. Thiscement is termed “low-alkaline cement”. Large amounts of pozzolans were used to produce the low-alkalinecement with ordinary Portland cement. Silica fume was found to be an effective pozzolans to reduce pH, butthe needed large amount of silica fume reduced the workability of fresh concrete. Therefore, the authors alsoused fly ash with silica fume, to develop more workable low-alkaline cement, termed high-volume fly ashsilica fume cement (HFSC). Two types of HFSC developed showed high compressive strength, smallerdrying shrinkage and lower temperature rise than that of ordinary Portland cement. It was confirmed thatHFSC could be used as self-compacting concrete. Therefore they can be applied as either structural orbackfilling concrete in the disposal system.
机译：减少在长期放射性废物的处置系统安全评估中的不确定性，开发了水泥，其产生浸出的pH值比普通水泥糊的浸出物。这水泥被称为“低碱性水泥”。大量的波佐醇用于生产低碱性水泥与普通的波特兰水泥。发现二氧化硅烟油是一种有效的火山灰，以减少pH，但是所需的大量二氧化硅烟雾降低了新混凝土的可加工性。因此，作者也用二氧化硅烟雾使用粉煤灰，开发更加可行的低碱性水泥，称为大容量粉煤灰硅胶水泥（HFSC）。两种类型的HFSC开发出现高抗压强度，更小干燥收缩和较低的温度升高，比普通波特兰水泥。它被证实了HFSC可用作自压制混凝土。因此，它们可以应用于结构或在处理系统中回填混凝土。

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