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1.发明授权
公开(公告)号：US5595561A
公开(公告)日：1997-01-21
申请号：US521302
申请日：1995-08-29
申请人： Dennis L. Bean , Lillian D. Wakeley , Judy C. Tom , Melvin C. Sykes , William N. Brabston , Philip G. Malone
发明人： Dennis L. Bean , Lillian D. Wakeley , Judy C. Tom , Melvin C. Sykes , William N. Brabston , Philip G. Malone
CPC分类号： B09B3/0033 , G21F9/34
摘要： A low-temperature method for producing coated hazardous waste pellets whichre used as the aggregate in a concrete wasteform is characterized by combining hazardous waste with a chemically setting organic polymer to form a mixture which is formed into pellets. The pellets are first coated with epoxy and then coated with a silicate-based powder. The liquid concrete-pellet mixture is then placed in molds which can be rotated to concentrate the pellets away from the perimeter of the wasteform. The double-coated hazardous waste pellets have improved bonding when used as a coarse aggregate in a concrete mixture. The resulting wasteform is self-supporting and needs no external container for transportation, storage, or disposal.
摘要翻译： 在混凝土废料形式中用作骨料的涂覆的危险废料颗粒的低温方法的特征在于将危险废物与化学沉淀的有机聚合物结合以形成形成颗粒的混合物。 首先用环氧树脂涂覆颗粒，然后用硅酸盐基粉末涂覆。 然后将液体混凝土颗粒混合物置于可以旋转的模具中，以将颗粒集中在远离废物形式的周边的位置。 当用作混凝土混合物中的粗骨料时，双重涂层的危险废料颗粒具有改善的粘合。 所产生的废物形式是自支撑的，不需要用于运输，储存或处置的外部容器。
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公开(公告)号：US5414197A
公开(公告)日：1995-05-09
申请号：US254004
申请日：1994-06-03
摘要： A method of containing hazardous and toxic wastes includes the steps of irporating the dried waste, in a salt form, in melted polymer, such as asphalt, and forming the waste salt and asphalt blend into aggregate pellets. The pellets are coated with a powdered coating material that is compatible with a portland cement-based mortar or other cementitious material which is used. The coated particles are mixed with mortar to form a polymer-aggregate concrete and cast into wasteforms for storage or burial. If it is desirable to produce a waste form with a continuous layer of mortar on the exterior of the concrete monolith the mold can be placed on a turntable and spun, or otherwise exposed to a centrifugal force to force the mortar to the outside of the mold. Centrifugal separation is possible because the polymer-waste mixture typically has a specific gravity near 1.5 while that of the cementitious mixture is typically greater than 2.0.
摘要翻译： 含有危险和有毒废物的方法包括将干燥废物以盐形式混入熔融聚合物如沥青中并将废盐和沥青混合物形成骨料颗粒的步骤。 该粒料涂覆有与波特兰水泥基砂浆或所用其它胶结材料相容的粉末涂料。 将涂覆的颗粒与砂浆混合以形成聚合物 - 骨料混凝土并浇注成废物形式用于储存或埋置。 如果希望在混凝土整体的外部产生具有连续的砂浆层的废料，则可以将模具放置在转盘上并旋转或以其它方式暴露于离心力以迫使砂浆到模具的外部 。 离心分离是可能的，因为聚合物 - 废物混合物通常具有接近1.5的比重，而水泥混合物的比重通常大于2.0。
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3.发明授权Method of increasing density and strength of highly siliceous cement-based materials 失效提高高硅质水泥基材料密度和强度的方法
公开(公告)号：US5531824A
公开(公告)日：1996-07-02
申请号：US451082
申请日：1995-05-25
CPC分类号： C04B41/009 , C04B41/5024 , C04B41/5072 , C04B41/65 , C04B41/68 , Y10S106/01
摘要： High-strength, high-hardness concrete, mortar, or grout is prepared by blending portland cement, water, and aggregate with a source of reactive silica, pouring the concrete mixture into a form, allowing the concrete to cure until it reaches its conventional 28-day strength, and immersing the cured concrete in a solution of alkali metal hydroxide and aluminum nitrate at 60.degree.-110.degree. C. for 3-14 days. Alternatively, the cured concrete may be sprayed with the solution and maintained at 60.degree.-110.degree. C. for 3-14 days. A dense, hard surface layer of alkali metal aluminum silicate is formed, the compressive strength and surface hardness of the concrete is increased, and the water infiltration rate into the concrete is decreased.
摘要翻译： 通过将波特兰水泥，水和骨料与反应性二氧化硅源混合制备高强度，高硬度混凝土，砂浆或水泥浆，将混凝土混合物倒入一种形式，使混凝土固化直至达到常规28 - 日强度，并将固化的混凝土浸入60℃-110℃的碱金属氢氧化物和硝酸铝溶液中3-14天。 或者，固化的混凝土可以用溶液喷雾并保持在60-110℃3-14天。 形成了一层致密，硬质的表面层的碱金属硅酸铝，混凝土的抗压强度和表面硬度提高，混凝土中的水渗透率降低。
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