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首页> 外文会议>2001 conference of Waste Management (WM);Annual Waste Management Symposium >COLLOIDAL SILICA GROUT SELECTION AND CHARACTERIZATION INSUPPORT OF THE BARRIER DEPLOYMENT AT BROOKHAVEN NATIONALLABORATORY
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COLLOIDAL SILICA GROUT SELECTION AND CHARACTERIZATION INSUPPORT OF THE BARRIER DEPLOYMENT AT BROOKHAVEN NATIONALLABORATORY

机译：布鲁克哈芬国家实验室支持屏障部署的胶体二氧化硅灌浆的选择和表征

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Small and large-scale laboratory testing of colloidal silica grout was performed in support of the BrookhavenrnNational Laboratory (BNL) Linear Accelerator Isotope Producer (BLIP) grouting project. The testing consistedrnof two phases: the selection of a colloidal silica variant that best reduced the saturated hydraulic conductivity ofrnthe native Brookhaven soils in column injection tests, and the injection of the selected colloidal silica into largernsand tanks to determine the in situ saturated hydraulic conductivity of the grouted sand. Nine colloidal silicarnvariants, having different colloid particle size ranges, were identified, injected into sand columns, and tested in arnflexible wall permeameter. Results indicate that the selected colloidal silica grout was successful at reducing thernsaturated hydraulic conductivity of the BNL soils by four to five orders of magnitude. Additional soil columnsrnwere grouted to replicate the results and to develop soil-water characteristic curves for the grouted material forrncomputer modeling parameters. The soil-water characteristic curves developed for the grouted soils were uniquernand supported the use of the colloidal silica grout to isolate activated soils in the vadose zone. Further testingrnwas conducted with the selected colloidal silica by injecting it into sand tanks placed in a load cell to simulaterninjection at depth; and results indicate that the saturated hydraulic conductivity of the grouted sands was reducedrnby two to six orders of magnitude.
机译：在布鲁克海文国家实验室（BNL）线性加速器同位素生产者（BLIP）灌浆项目的支持下，进行了胶体二氧化硅灌浆的小型和大型实验室测试。该测试包括两个阶段：选择在柱注入测试中能最大程度降低天然布鲁克海文土壤饱和水导率的胶态二氧化硅变体，以及将选定的胶态二氧化硅注入更大的砂箱中以确定原位饱和饱和水导率。灌浆的沙子。鉴定出九种胶体二氧化硅变体，它们具有不同的胶体粒径范围，并注入砂柱中，并在易弯曲的壁式渗透仪中进行测试。结果表明，所选择的胶态二氧化硅灌浆成功地将BNL土的饱和水力传导率降低了4到5个数量级。对额外的土壤柱进行灌浆，以复制结果并为灌浆材料建立土壤-水特征曲线，以用于计算机建模参数。为灌浆土壤开发的土壤-水特征曲线是独特的，并支持使用胶体二氧化硅灌浆隔离渗流带中的活化土壤。通过将选定的胶态二氧化硅注入到称重传感器中的砂箱中，进行进一步的测试，以模拟深处的注入；结果表明，灌浆砂的饱和导水率降低了两个到六个数量级。

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